Merge branch 'master' into balsalmiq-support

.gitlab-ci.yml

@@ -403,13 +403,6 @@ docs:check:links:
     # Check the internal links
     - bundle exec nanoc check internal_links
 
-bundler:check:
-  stage: test
-  <<: *dedicated-runner
-  <<: *ruby-static-analysis
-  script:
-   - bundle check
-
 bundler:audit:
   stage: test
   <<: *ruby-static-analysis

README.md

@@ -4,6 +4,7 @@
 [![Overall test coverage](https://gitlab.com/gitlab-org/gitlab-ce/badges/master/coverage.svg)](https://gitlab.com/gitlab-org/gitlab-ce/pipelines)
 [![Code Climate](https://codeclimate.com/github/gitlabhq/gitlabhq.svg)](https://codeclimate.com/github/gitlabhq/gitlabhq)
 [![Core Infrastructure Initiative Best Practices](https://bestpractices.coreinfrastructure.org/projects/42/badge)](https://bestpractices.coreinfrastructure.org/projects/42)
+[![Gitter](https://badges.gitter.im/gitlabhq/gitlabhq.svg)](https://gitter.im/gitlabhq/gitlabhq?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 ## Test coverage
 

app/assets/javascripts/blob/pdf/index.js

@@ -31,7 +31,7 @@ export default () => {
       },
     },
     template: `
-      <div class="container-fluid md prepend-top-default append-bottom-default">
+      <div class="js-pdf-viewer container-fluid md prepend-top-default append-bottom-default">
         <div
           class="text-center loading"
           v-if="loading && !error">

app/assets/javascripts/blob/viewer/index.js

+/* global Flash */
+export default class BlobViewer {
+  constructor() {
+    this.switcher = document.querySelector('.js-blob-viewer-switcher');
+    this.switcherBtns = document.querySelectorAll('.js-blob-viewer-switch-btn');
+    this.copySourceBtn = document.querySelector('.js-copy-blob-source-btn');
+    this.simpleViewer = document.querySelector('.blob-viewer[data-type="simple"]');
+    this.richViewer = document.querySelector('.blob-viewer[data-type="rich"]');
+    this.$blobContentHolder = $('#blob-content-holder');
+
+    let initialViewerName = document.querySelector('.blob-viewer:not(.hidden)').getAttribute('data-type');
+
+    this.initBindings();
+
+    if (this.switcher && location.hash.indexOf('#L') === 0) {
+      initialViewerName = 'simple';
+    }
+
+    this.switchToViewer(initialViewerName);
+  }
+
+  initBindings() {
+    if (this.switcherBtns.length) {
+      Array.from(this.switcherBtns)
+        .forEach((el) => {
+          el.addEventListener('click', this.switchViewHandler.bind(this));
+        });
+    }
+
+    if (this.copySourceBtn) {
+      this.copySourceBtn.addEventListener('click', () => {
+        if (this.copySourceBtn.classList.contains('disabled')) return;
+
+        this.switchToViewer('simple');
+      });
+    }
+  }
+
+  switchViewHandler(e) {
+    const target = e.currentTarget;
+
+    e.preventDefault();
+
+    this.switchToViewer(target.getAttribute('data-viewer'));
+  }
+
+  toggleCopyButtonState() {
+    if (!this.copySourceBtn) return;
+
+    if (this.simpleViewer.getAttribute('data-loaded')) {
+      this.copySourceBtn.setAttribute('title', 'Copy source to clipboard');
+      this.copySourceBtn.classList.remove('disabled');
+    } else if (this.activeViewer === this.simpleViewer) {
+      this.copySourceBtn.setAttribute('title', 'Wait for the source to load to copy it to the clipboard');
+      this.copySourceBtn.classList.add('disabled');
+    } else {
+      this.copySourceBtn.setAttribute('title', 'Switch to the source to copy it to the clipboard');
+      this.copySourceBtn.classList.add('disabled');
+    }
+
+    $(this.copySourceBtn).tooltip('fixTitle');
+  }
+
+  loadViewer(viewerParam) {
+    const viewer = viewerParam;
+    const url = viewer.getAttribute('data-url');
+
+    if (!url || viewer.getAttribute('data-loaded') || viewer.getAttribute('data-loading')) {
+      return;
+    }
+
+    viewer.setAttribute('data-loading', 'true');
+
+    $.ajax({
+      url,
+      dataType: 'JSON',
+    })
+    .fail(() => new Flash('Error loading source view'))
+    .done((data) => {
+      viewer.innerHTML = data.html;
+      $(viewer).syntaxHighlight();
+
+      viewer.setAttribute('data-loaded', 'true');
+
+      this.$blobContentHolder.trigger('highlight:line');
+
+      this.toggleCopyButtonState();
+    });
+  }
+
+  switchToViewer(name) {
+    const newViewer = document.querySelector(`.blob-viewer[data-type='${name}']`);
+    if (this.activeViewer === newViewer) return;
+
+    const oldButton = document.querySelector('.js-blob-viewer-switch-btn.active');
+    const newButton = document.querySelector(`.js-blob-viewer-switch-btn[data-viewer='${name}']`);
+    const oldViewer = document.querySelector(`.blob-viewer:not([data-type='${name}'])`);
+
+    if (oldButton) {
+      oldButton.classList.remove('active');
+    }
+
+    if (newButton) {
+      newButton.classList.add('active');
+      newButton.blur();
+    }
+
+    if (oldViewer) {
+      oldViewer.classList.add('hidden');
+    }
+
+    newViewer.classList.remove('hidden');
+
+    this.activeViewer = newViewer;
+
+    this.toggleCopyButtonState();
+
+    this.loadViewer(newViewer);
+  }
+}

app/assets/javascripts/dispatcher.js

@@ -48,6 +48,7 @@ import BlobForkSuggestion from './blob/blob_fork_suggestion';
 import UserCallout from './user_callout';
 import { ProtectedTagCreate, ProtectedTagEditList } from './protected_tags';
 import ShortcutsWiki from './shortcuts_wiki';
+import BlobViewer from './blob/viewer/index';
 
 const ShortcutsBlob = require('./shortcuts_blob');
 
@@ -299,6 +300,7 @@ const ShortcutsBlob = require('./shortcuts_blob');
           gl.TargetBranchDropDown.bootstrap();
           break;
         case 'projects:blob:show':
+          new BlobViewer();
           gl.TargetBranchDropDown.bootstrap();
           initBlob();
           break;

app/assets/javascripts/line_highlighter.js

@@ -41,7 +41,6 @@ require('vendor/jquery.scrollTo');
     LineHighlighter.prototype._hash = '';
 
     function LineHighlighter(hash) {
-      var range;
       if (hash == null) {
         // Initialize a LineHighlighter object
         //
@@ -51,10 +50,22 @@ require('vendor/jquery.scrollTo');
       this.setHash = bind(this.setHash, this);
       this.highlightLine = bind(this.highlightLine, this);
       this.clickHandler = bind(this.clickHandler, this);
+      this.highlightHash = this.highlightHash.bind(this);
       this._hash = hash;
       this.bindEvents();
-      if (hash !== '') {
-        range = this.hashToRange(hash);
+      this.highlightHash();
+    }
+
+    LineHighlighter.prototype.bindEvents = function() {
+      const $blobContentHolder = $('#blob-content-holder');
+      $blobContentHolder.on('click', 'a[data-line-number]', this.clickHandler);
+      $blobContentHolder.on('highlight:line', this.highlightHash);
+    };
+
+    LineHighlighter.prototype.highlightHash = function() {
+      var range;
+      if (this._hash !== '') {
+        range = this.hashToRange(this._hash);
         if (range[0]) {
           this.highlightRange(range);
           $.scrollTo("#L" + range[0], {
@@ -64,10 +75,6 @@ require('vendor/jquery.scrollTo');
           });
         }
       }
-    }
-
-    LineHighlighter.prototype.bindEvents = function() {
-      $('#blob-content-holder').on('click', 'a[data-line-number]', this.clickHandler);
     };
 
     LineHighlighter.prototype.clickHandler = function(event) {

app/assets/stylesheets/framework/markdown_area.scss

@@ -120,6 +120,10 @@
     // Ensure that image does not exceed viewport
     max-height: calc(100vh - 100px);
   }
+
+  table {
+    @include markdown-table;
+  }
 }
 
 .toolbar-group {

app/assets/stylesheets/framework/mixins.scss

@@ -12,6 +12,13 @@
   max-width: $max_width;
 }
 
+/*
+ * Mixin for markdown tables
+ */
+@mixin markdown-table {
+  width: auto;
+}
+
 /*
  * Base mixin for lists in GitLab
  */

app/assets/stylesheets/pages/builds.scss

@@ -200,6 +200,7 @@
 
   .header-content {
     flex: 1;
+    line-height: 1.8;
 
     a {
       color: $gl-text-color;

app/assets/stylesheets/pages/issues.scss

@@ -101,11 +101,16 @@ ul.related-merge-requests > li {
   }
 }
 
-.merge-request-ci-status {
+.merge-request-ci-status,
+.related-merge-requests {
+  .ci-status-link {
+    display: block;
+    margin-top: 3px;
+    margin-right: 5px;
+  }
+
   svg {
-    margin-right: 4px;
-    position: relative;
-    top: 1px;
+    display: block;
   }
 }
 

app/assets/stylesheets/pages/notes.scss

@@ -97,6 +97,10 @@ ul.notes {
             padding-left: 1.3em;
           }
         }
+
+        table {
+          @include markdown-table;
+        }
       }
     }
 

app/assets/stylesheets/pages/wiki.scss

@@ -159,3 +159,9 @@ ul.wiki-pages-list.content-list {
     padding: 5px 0;
   }
 }
+
+.wiki {
+  table {
+    @include markdown-table;
+  }
+}

app/controllers/application_controller.rb

@@ -118,6 +118,10 @@ class ApplicationController < ActionController::Base
     end
   end
 
+  def respond_422
+    head :unprocessable_entity
+  end
+
   def no_cache_headers
     response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
     response.headers["Pragma"] = "no-cache"

app/controllers/concerns/renders_blob.rb

+module RendersBlob
+  extend ActiveSupport::Concern
+
+  def render_blob_json(blob)
+    viewer =
+      if params[:viewer] == 'rich'
+        blob.rich_viewer
+      else
+        blob.simple_viewer
+      end
+    return render_404 unless viewer
+
+    render json: {
+      html: view_to_html_string("projects/blob/_viewer", viewer: viewer, load_asynchronously: false)
+    }
+  end
+end

app/controllers/projects/blob_controller.rb

@@ -2,6 +2,7 @@
 class Projects::BlobController < Projects::ApplicationController
   include ExtractsPath
   include CreatesCommit
+  include RendersBlob
   include ActionView::Helpers::SanitizeHelper
 
   # Raised when given an invalid file path
@@ -34,8 +35,20 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def show
+    @blob.override_max_size! if params[:override_max_size] == 'true'
+
+    respond_to do |format|
+      format.html do
         environment_params = @repository.branch_exists?(@ref) ? { ref: @ref } : { commit: @commit }
         @environment = EnvironmentsFinder.new(@project, current_user, environment_params).execute.last
+
+        render 'show'
+      end
+
+      format.json do
+        render_blob_json(@blob)
+      end
+    end
   end
 
   def edit
@@ -96,7 +109,7 @@ class Projects::BlobController < Projects::ApplicationController
   private
 
   def blob
-    @blob ||= Blob.decorate(@repository.blob_at(@commit.id, @path))
+    @blob ||= Blob.decorate(@repository.blob_at(@commit.id, @path), @project)
 
     if @blob
       @blob

app/controllers/projects/builds_controller.rb

 class Projects::BuildsController < Projects::ApplicationController
   before_action :build, except: [:index, :cancel_all]
-  before_action :authorize_read_build!, except: [:cancel, :cancel_all, :retry, :play]
+  before_action :authorize_read_build!, only: [:index, :show, :status, :raw, :trace]
   before_action :authorize_update_build!, except: [:index, :show, :status, :raw, :trace]
   layout 'project'
 
@@ -60,20 +60,22 @@ class Projects::BuildsController < Projects::ApplicationController
   end
 
   def retry
-    return render_404 unless @build.retryable?
+    return respond_422 unless @build.retryable?
 
     build = Ci::Build.retry(@build, current_user)
     redirect_to build_path(build)
   end
 
   def play
-    return render_404 unless @build.playable?
+    return respond_422 unless @build.playable?
 
     build = @build.play(current_user)
     redirect_to build_path(build)
   end
 
   def cancel
+    return respond_422 unless @build.cancelable?
+
     @build.cancel
     redirect_to build_path(@build)
   end
@@ -85,9 +87,12 @@ class Projects::BuildsController < Projects::ApplicationController
   end
 
   def erase
-    @build.erase(erased_by: current_user)
+    if @build.erase(erased_by: current_user)
       redirect_to namespace_project_build_path(project.namespace, project, @build),
                 notice: "Build has been successfully erased!"
+    else
+      respond_422
+    end
   end
 
   def raw

app/controllers/projects/raw_controller.rb

@@ -15,7 +15,7 @@ class Projects::RawController < Projects::ApplicationController
 
       return if cached_blob?
 
-      if @blob.lfs_pointer? && project.lfs_enabled?
+      if @blob.valid_lfs_pointer?
         send_lfs_object
       else
         send_git_blob @repository, @blob

app/helpers/blob_helper.rb

@@ -52,7 +52,7 @@ module BlobHelper
 
     if !on_top_of_branch?(project, ref)
       button_tag label, class: "#{common_classes} disabled has-tooltip", title: "You can only #{action} files when you are on a branch", data: { container: 'body' }
-    elsif blob.lfs_pointer?
+    elsif blob.valid_lfs_pointer?
       button_tag label, class: "#{common_classes} disabled has-tooltip", title: "It is not possible to #{action} files that are stored in LFS using the web interface", data: { container: 'body' }
     elsif can_modify_blob?(blob, project, ref)
       button_tag label, class: "#{common_classes}", 'data-target' => "#modal-#{modal_type}-blob", 'data-toggle' => 'modal'
@@ -95,7 +95,7 @@ module BlobHelper
   end
 
   def can_modify_blob?(blob, project = @project, ref = @ref)
-    !blob.lfs_pointer? && can_edit_tree?(project, ref)
+    !blob.valid_lfs_pointer? && can_edit_tree?(project, ref)
   end
 
   def leave_edit_message
@@ -118,28 +118,15 @@ module BlobHelper
     icon("#{file_type_icon_class('file', mode, name)} fw")
   end
 
-  def blob_text_viewable?(blob)
-    blob && blob.text? && !blob.lfs_pointer? && !blob.only_display_raw?
-  end
-
-  def blob_rendered_as_text?(blob)
-    blob_text_viewable?(blob) && blob.to_partial_path(@project) == 'text'
-  end
-
-  def blob_size(blob)
-    if blob.lfs_pointer?
-      blob.lfs_size
-    else
-      blob.size
-    end
+  def blob_raw_url
+    namespace_project_raw_path(@project.namespace, @project, @id)
   end
 
   # SVGs can contain malicious JavaScript; only include whitelisted
   # elements and attributes. Note that this whitelist is by no means complete
   # and may omit some elements.
-  def sanitize_svg(blob)
-    blob.data = Gitlab::Sanitizers::SVG.clean(blob.data)
-    blob
+  def sanitize_svg_data(data)
+    Gitlab::Sanitizers::SVG.clean(data)
   end
 
   # If we blindly set the 'real' content type when serving a Git blob we
@@ -221,13 +208,42 @@ module BlobHelper
     clipboard_button(text: file_path, gfm: "`#{file_path}`", class: 'btn-clipboard btn-transparent prepend-left-5', title: 'Copy file path to clipboard')
   end
 
-  def copy_blob_content_button(blob)
-    return if markup?(blob.name)
-
-    clipboard_button(target: ".blob-content[data-blob-id='#{blob.id}']", class: "btn btn-sm", title: "Copy content to clipboard")
+  def copy_blob_source_button(blob)
+    clipboard_button(target: ".blob-content[data-blob-id='#{blob.id}']", class: "btn btn-sm js-copy-blob-source-btn", title: "Copy source to clipboard")
   end
 
   def open_raw_file_button(path)
     link_to icon('file-code-o'), path, class: 'btn btn-sm has-tooltip', target: '_blank', rel: 'noopener noreferrer', title: 'Open raw', data: { container: 'body' }
   end
+
+  def blob_render_error_reason(viewer)
+    case viewer.render_error
+    when :too_large
+      max_size =
+        if viewer.absolutely_too_large?
+          viewer.absolute_max_size
+        elsif viewer.too_large?
+          viewer.max_size
+        end
+      "it is larger than #{number_to_human_size(max_size)}"
+    when :server_side_but_stored_in_lfs
+      "it is stored in LFS"
+    end
+  end
+
+  def blob_render_error_options(viewer)
+    options = []
+
+    if viewer.render_error == :too_large && viewer.can_override_max_size?
+      options << link_to('load it anyway', url_for(params.merge(viewer: viewer.type, override_max_size: true, format: nil)))
+    end
+
+    if viewer.rich? && viewer.blob.rendered_as_text?
+      options << link_to('view the source', '#', class: 'js-blob-viewer-switch-btn', data: { viewer: 'simple' })
+    end
+
+    options << link_to('download it', blob_raw_url, target: '_blank', rel: 'noopener noreferrer')
+
+    options
+  end
 end

app/models/blob.rb

@@ -3,8 +3,41 @@ class Blob < SimpleDelegator
   CACHE_TIME = 60 # Cache raw blobs referred to by a (mutable) ref for 1 minute
   CACHE_TIME_IMMUTABLE = 3600 # Cache blobs referred to by an immutable reference for 1 hour
 
-  # The maximum size of an SVG that can be displayed.
-  MAXIMUM_SVG_SIZE = 2.megabytes
+  MAXIMUM_TEXT_HIGHLIGHT_SIZE = 1.megabyte
+
+  # Finding a viewer for a blob happens based only on extension and whether the
+  # blob is binary or text, which means 1 blob should only be matched by 1 viewer,
+  # and the order of these viewers doesn't really matter.
+  #
+  # However, when the blob is an LFS pointer, we cannot know for sure whether the
+  # file being pointed to is binary or text. In this case, we match only on
+  # extension, preferring binary viewers over text ones if both exist, since the
+  # large files referred to in "Large File Storage" are much more likely to be
+  # binary than text.
+  #
+  # `.stl` files, for example, exist in both binary and text forms, and are
+  # handled by different viewers (`BinarySTL` and `TextSTL`) depending on blob
+  # type. LFS pointers to `.stl` files are assumed to always be the binary kind,
+  # and use the `BinarySTL` viewer.
+  RICH_VIEWERS = [
+    BlobViewer::Markup,
+    BlobViewer::Notebook,
+    BlobViewer::SVG,
+
+    BlobViewer::Image,
+    BlobViewer::Sketch,
+    BlobViewer::Balsamiq,
+
+    BlobViewer::PDF,
+
+    BlobViewer::BinarySTL,
+    BlobViewer::TextSTL,
+  ].freeze
+
+  BINARY_VIEWERS = RICH_VIEWERS.select(&:binary?).freeze
+  TEXT_VIEWERS = RICH_VIEWERS.select(&:text?).freeze
+
+  attr_reader :project
 
   # Wrap a Gitlab::Git::Blob object, or return nil when given nil
   #
@@ -16,10 +49,16 @@ class Blob < SimpleDelegator
   #
   #     blob = Blob.decorate(nil)
   #     puts "truthy" if blob # No output
-  def self.decorate(blob)
+  def self.decorate(blob, project = nil)
     return if blob.nil?
 
-    new(blob)
+    new(blob, project)
+  end
+
+  def initialize(blob, project = nil)
+    @project = project
+
+    super(blob)
   end
 
   # Returns the data of the blob.
@@ -35,88 +74,107 @@ class Blob < SimpleDelegator
   end
 
   def no_highlighting?
-    size && size > 1.megabyte
+    size && size > MAXIMUM_TEXT_HIGHLIGHT_SIZE
   end
 
-  def only_display_raw?
+  def too_large?
     size && truncated?
   end
 
+  # Returns the size of the file that this blob represents. If this blob is an
+  # LFS pointer, this is the size of the file stored in LFS. Otherwise, this is
+  # the size of the blob itself.
+  def raw_size
+    if valid_lfs_pointer?
+      lfs_size
+    else
+      size
+    end
+  end
+
+  # Returns whether the file that this blob represents is binary. If this blob is
+  # an LFS pointer, we assume the file stored in LFS is binary, unless a
+  # text-based rich blob viewer matched on the file's extension. Otherwise, this
+  # depends on the type of the blob itself.
+  def raw_binary?
+    if valid_lfs_pointer?
+      if rich_viewer
+        rich_viewer.binary?
+      else
+        true
+      end
+    else
+      binary?
+    end
+  end
+
   def extension
-    extname.downcase.delete('.')
+    @extension ||= extname.downcase.delete('.')
   end
 
-  def svg?
-    text? && language && language.name == 'SVG'
+  def video?
+    UploaderHelper::VIDEO_EXT.include?(extension)
   end
 
-  def pdf?
-    extension == 'pdf'
+  def readable_text?
+    text? && !valid_lfs_pointer? && !too_large?
   end
 
-  def ipython_notebook?
-    text? && language&.name == 'Jupyter Notebook'
+  def valid_lfs_pointer?
+    lfs_pointer? && project&.lfs_enabled?
   end
 
-  def sketch?
-    binary? && extension == 'sketch'
+  def invalid_lfs_pointer?
+    lfs_pointer? && !project&.lfs_enabled?
   end
 
-  def balsamiq?
-    binary? && extension == 'bmpr'
+  def simple_viewer
+    @simple_viewer ||= simple_viewer_class.new(self)
   end
 
-  def stl?
-    extension == 'stl'
+  def rich_viewer
+    return @rich_viewer if defined?(@rich_viewer)
+
+    @rich_viewer = rich_viewer_class&.new(self)
   end
 
-  def markup?
-    text? && Gitlab::MarkupHelper.markup?(name)
+  def rendered_as_text?(ignore_errors: true)
+    simple_viewer.text? && (ignore_errors || simple_viewer.render_error.nil?)
   end
 
-  def size_within_svg_limits?
-    size <= MAXIMUM_SVG_SIZE
+  def show_viewer_switcher?
+    rendered_as_text? && rich_viewer
   end
 
-  def video?
-    UploaderHelper::VIDEO_EXT.include?(extname.downcase.delete('.'))
+  def override_max_size!
+    simple_viewer&.override_max_size = true
+    rich_viewer&.override_max_size = true
   end
 
-  def to_partial_path(project)
-    if lfs_pointer?
-      if project.lfs_enabled?
-        'download'
-      else
-        'text'
-      end
-    elsif image?
-      'image'
-    elsif svg?
-      'svg'
-    elsif pdf?
-      'pdf'
-    elsif ipython_notebook?
-      'notebook'
-    elsif sketch?
-      'sketch'
-    elsif stl?
-      'stl'
-    elsif balsamiq?
-      'bmpr'
-    elsif markup?
-      if only_display_raw?
-        'too_large'
-      else
-        'markup'
+  private
+
+  def simple_viewer_class
+    if empty?
+      BlobViewer::Empty
+    elsif raw_binary?
+      BlobViewer::Download
+    else # text
+      BlobViewer::Text
     end
-    elsif text?
-      if only_display_raw?
-        'too_large'
-      else
-        'text'
   end
-    else
-      'download'
+
+  def rich_viewer_class
+    return if invalid_lfs_pointer? || empty?
+
+    classes =
+      if valid_lfs_pointer?
+        BINARY_VIEWERS + TEXT_VIEWERS
+      elsif binary?
+        BINARY_VIEWERS
+      else # text
+        TEXT_VIEWERS
       end
+
+    classes.find { |viewer_class| viewer_class.can_render?(self) }
   end
 end

app/models/blob_viewer/base.rb

+module BlobViewer
+  class Base
+    class_attribute :partial_name, :type, :extensions, :client_side, :binary, :switcher_icon, :switcher_title, :max_size, :absolute_max_size
+
+    delegate :partial_path, :rich?, :simple?, :client_side?, :server_side?, :text?, :binary?, to: :class
+
+    attr_reader :blob
+    attr_accessor :override_max_size
+
+    def initialize(blob)
+      @blob = blob
+    end
+
+    def self.partial_path
+      "projects/blob/viewers/#{partial_name}"
+    end
+
+    def self.rich?
+      type == :rich
+    end
+
+    def self.simple?
+      type == :simple
+    end
+
+    def self.client_side?
+      client_side
+    end
+
+    def self.server_side?
+      !client_side?
+    end
+
+    def self.binary?
+      binary
+    end
+
+    def self.text?
+      !binary?
+    end
+
+    def self.can_render?(blob)
+      !extensions || extensions.include?(blob.extension)
+    end
+
+    def too_large?
+      blob.raw_size > max_size
+    end
+
+    def absolutely_too_large?
+      blob.raw_size > absolute_max_size
+    end
+
+    def can_override_max_size?
+      too_large? && !absolutely_too_large?
+    end
+
+    # This method is used on the server side to check whether we can attempt to
+    # render the blob at all. Human-readable error messages are found in the
+    # `BlobHelper#blob_render_error_reason` helper.
+    #
+    # This method does not and should not load the entire blob contents into
+    # memory, and should not be overridden to do so in order to validate the
+    # format of the blob.
+    #
+    # Prefer to implement a client-side viewer, where the JS component loads the
+    # binary from `blob_raw_url` and does its own format validation and error
+    # rendering, especially for potentially large binary formats.
+    def render_error
+      return @render_error if defined?(@render_error)
+
+      @render_error =
+        if server_side_but_stored_in_lfs?
+          # Files stored in LFS can only be rendered using a client-side viewer,
+          # since we do not want to read large amounts of data into memory on the
+          # server side. Client-side viewers use JS and can fetch the file from
+          # `blob_raw_url` using AJAX.
+          :server_side_but_stored_in_lfs
+        elsif override_max_size ? absolutely_too_large? : too_large?
+          :too_large
+        end
+    end
+
+    def prepare!
+      if server_side? && blob.project
+        blob.load_all_data!(blob.project.repository)
+      end
+    end
+
+    private
+
+    def server_side_but_stored_in_lfs?
+      server_side? && blob.valid_lfs_pointer?
+    end
+  end
+end

app/models/blob_viewer/binary_stl.rb

+module BlobViewer
+  class BinarySTL < Base
+    include Rich
+    include ClientSide
+
+    self.partial_name = 'stl'
+    self.extensions = %w(stl)
+    self.binary = true
+  end
+end

app/models/blob_viewer/client_side.rb

+module BlobViewer
+  module ClientSide
+    extend ActiveSupport::Concern
+
+    included do
+      self.client_side = true
+      self.max_size = 10.megabytes
+      self.absolute_max_size = 50.megabytes
+    end
+  end
+end

app/models/blob_viewer/download.rb

+module BlobViewer
+  class Download < Base
+    include Simple
+    # We treat the Download viewer as if it renders the content client-side,
+    # so that it doesn't attempt to load the entire blob contents and is
+    # rendered synchronously instead of loaded asynchronously.
+    include ClientSide
+
+    self.partial_name = 'download'
+    self.binary = true
+
+    # We can always render the Download viewer, even if the blob is in LFS or too large.
+    def render_error
+      nil
+    end
+  end
+end

app/models/blob_viewer/empty.rb

+module BlobViewer
+  class Empty < Base
+    include Simple
+    include ServerSide
+
+    self.partial_name = 'empty'
+    self.binary = true
+  end
+end

app/models/blob_viewer/image.rb

+module BlobViewer
+  class Image < Base
+    include Rich
+    include ClientSide
+
+    self.partial_name = 'image'
+    self.extensions = UploaderHelper::IMAGE_EXT
+    self.binary = true
+    self.switcher_icon = 'picture-o'
+    self.switcher_title = 'image'
+  end
+end

app/models/blob_viewer/markup.rb

+module BlobViewer
+  class Markup < Base
+    include Rich
+    include ServerSide
+
+    self.partial_name = 'markup'
+    self.extensions = Gitlab::MarkupHelper::EXTENSIONS
+    self.binary = false
+  end
+end

app/models/blob_viewer/notebook.rb

+module BlobViewer
+  class Notebook < Base
+    include Rich
+    include ClientSide
+    
+    self.partial_name = 'notebook'
+    self.extensions = %w(ipynb)
+    self.binary = false
+    self.switcher_icon = 'file-text-o'
+    self.switcher_title = 'notebook'
+  end
+end

app/models/blob_viewer/pdf.rb

+module BlobViewer
+  class PDF < Base
+    include Rich
+    include ClientSide
+
+    self.partial_name = 'pdf'
+    self.extensions = %w(pdf)
+    self.binary = true
+    self.switcher_icon = 'file-pdf-o'
+    self.switcher_title = 'PDF'
+  end
+end

app/models/blob_viewer/rich.rb

+module BlobViewer
+  module Rich
+    extend ActiveSupport::Concern
+
+    included do
+      self.type = :rich
+      self.switcher_icon = 'file-text-o'
+      self.switcher_title = 'rendered file'
+    end
+  end
+end

app/models/blob_viewer/server_side.rb

+module BlobViewer
+  module ServerSide
+    extend ActiveSupport::Concern
+
+    included do
+      self.client_side = false
+      self.max_size = 2.megabytes
+      self.absolute_max_size = 5.megabytes
+    end
+  end
+end

app/models/blob_viewer/simple.rb

+module BlobViewer
+  module Simple
+    extend ActiveSupport::Concern
+
+    included do
+      self.type = :simple
+      self.switcher_icon = 'code'
+      self.switcher_title = 'source'
+    end
+  end
+end

app/models/blob_viewer/sketch.rb

+module BlobViewer
+  class Sketch < Base
+    include Rich
+    include ClientSide
+
+    self.partial_name = 'sketch'
+    self.extensions = %w(sketch)
+    self.binary = true
+    self.switcher_icon = 'file-image-o'
+    self.switcher_title = 'preview'
+  end
+end

app/models/blob_viewer/svg.rb

+module BlobViewer
+  class SVG < Base
+    include Rich
+    include ServerSide
+
+    self.partial_name = 'svg'
+    self.extensions = %w(svg)
+    self.binary = false
+    self.switcher_icon = 'picture-o'
+    self.switcher_title = 'image'
+  end
+end

app/models/blob_viewer/text.rb

+module BlobViewer
+  class Text < Base
+    include Simple
+    include ServerSide
+
+    self.partial_name = 'text'
+    self.binary = false
+    self.max_size = 1.megabyte
+    self.absolute_max_size = 10.megabytes
+  end
+end

app/models/blob_viewer/text_stl.rb

+module BlobViewer
+  class TextSTL < BinarySTL
+    self.binary = false
+  end
+end

app/models/commit.rb

@@ -316,7 +316,7 @@ class Commit
   def uri_type(path)
     entry = @raw.tree.path(path)
     if entry[:type] == :blob
-      blob = ::Blob.decorate(Gitlab::Git::Blob.new(name: entry[:name]))
+      blob = ::Blob.decorate(Gitlab::Git::Blob.new(name: entry[:name]), @project)
       blob.image? || blob.video? ? :raw : :blob
     else
       entry[:type]

app/models/project_services/chat_notification_service.rb

@@ -22,7 +22,7 @@ class ChatNotificationService < Service
   end
 
   def can_test?
-    super && valid?
+    valid?
   end
 
   def self.supported_events

app/models/repository.rb

@@ -450,7 +450,7 @@ class Repository
 
   def blob_at(sha, path)
     unless Gitlab::Git.blank_ref?(sha)
-      Blob.decorate(Gitlab::Git::Blob.find(self, sha, path))
+      Blob.decorate(Gitlab::Git::Blob.find(self, sha, path), project)
     end
   rescue Gitlab::Git::Repository::NoRepository
     nil

app/models/service.rb

@@ -26,6 +26,7 @@ class Service < ActiveRecord::Base
   has_one :service_hook
 
   validates :project_id, presence: true, unless: proc { |service| service.template? }
+  validates :type, presence: true
 
   scope :visible, -> { where.not(type: 'GitlabIssueTrackerService') }
   scope :issue_trackers, -> { where(category: 'issue_tracker') }
@@ -131,7 +132,7 @@ class Service < ActiveRecord::Base
   end
 
   def can_test?
-    !project.empty_repo?
+    true
   end
 
   # reason why service cannot be tested

app/models/user.rb

@@ -1068,11 +1068,13 @@ class User < ActiveRecord::Base
       User.find_by_email(s)
     end
 
-    scope.create(
+    user = scope.build(
       username: username,
       email: email,
       &creation_block
     )
+    user.save(validate: false)
+    user
   ensure
     Gitlab::ExclusiveLease.cancel(lease_key, uuid)
   end

app/views/notify/repository_push_email.html.haml

@@ -74,7 +74,7 @@
           - else
             %hr
             - blob = diff_file.blob
-            - if blob && blob.respond_to?(:text?) && blob_text_viewable?(blob)
+            - if blob && blob.readable_text?
               %table.code.white
                 = render partial: "projects/diffs/line", collection: diff_file.highlighted_diff_lines, as: :line, locals: { diff_file: diff_file, plain: true, email: true }
             - else

app/views/projects/blob/_blob.html.haml

@@ -26,9 +26,4 @@
   %article.file-holder
     = render "projects/blob/header", blob: blob
 
-    - if blob.empty?
-      .file-content.code
-        .nothing-here-block
-          Empty file
-    - else
-      = render blob.to_partial_path(@project), blob: blob
+    = render 'projects/blob/content', blob: blob

app/views/projects/blob/_content.html.haml

+- simple_viewer = blob.simple_viewer
+- rich_viewer = blob.rich_viewer
+- rich_viewer_active = rich_viewer && params[:viewer] != 'simple'
+
+= render 'projects/blob/viewer', viewer: simple_viewer, hidden: rich_viewer_active
+
+- if rich_viewer
+  = render 'projects/blob/viewer', viewer: rich_viewer, hidden: !rich_viewer_active

app/views/projects/blob/_header.html.haml

@@ -9,17 +9,19 @@
     = copy_file_path_button(blob.path)
 
     %small
-      = number_to_human_size(blob_size(blob))
+      = number_to_human_size(blob.raw_size)
 
   .file-actions.hidden-xs
+    = render 'projects/blob/viewer_switcher', blob: blob unless blame
+
     .btn-group{ role: "group" }<
-      = copy_blob_content_button(blob) if !blame && blob_rendered_as_text?(blob)
+      = copy_blob_source_button(blob) if !blame && blob.rendered_as_text?(ignore_errors: false)
       = open_raw_file_button(namespace_project_raw_path(@project.namespace, @project, @id))
       = view_on_environment_button(@commit.sha, @path, @environment) if @environment
 
     .btn-group{ role: "group" }<
       -# only show normal/blame view links for text files
-      - if blob_text_viewable?(blob)
+      - if blob.readable_text?
         - if blame
           = link_to 'Normal view', namespace_project_blob_path(@project.namespace, @project, @id),
               class: 'btn btn-sm'
@@ -34,7 +36,7 @@
           tree_join(@commit.sha, @path)), class: 'btn btn-sm js-data-file-blob-permalink-url'
 
     .btn-group{ role: "group" }<
-      = edit_blob_link if blob_text_viewable?(blob)
+      = edit_blob_link if blob.readable_text?
       - if current_user
         = replace_blob_link
         = delete_blob_link

app/views/projects/blob/_image.html.haml

-.file-content.image_file
-  %img{ src: namespace_project_raw_path(@project.namespace, @project, @id), alt: blob.name }

app/views/projects/blob/_render_error.html.haml

+.file-content.code
+  .nothing-here-block
+    The #{viewer.switcher_title} could not be displayed because #{blob_render_error_reason(viewer)}.
+
+    You can
+    = blob_render_error_options(viewer).to_sentence(two_words_connector: ' or ', last_word_connector: ', or ').html_safe
+    instead.

app/views/projects/blob/_svg.html.haml

-- if blob.size_within_svg_limits?
-  -# We need to scrub SVG but we cannot do so in the RawController: it would
-  -# be wrong/strange if RawController modified the data.
-  - blob.load_all_data!(@repository)
-  - blob = sanitize_svg(blob)
-  .file-content.image_file
-    %img{ src: "data:#{blob.mime_type};base64,#{Base64.encode64(blob.data)}", alt: blob.name }
-- else
-  = render 'too_large'

app/views/projects/blob/_text.html.haml

-- blob.load_all_data!(@repository)
-= render 'shared/file_highlight', blob: blob, repository: @repository

app/views/projects/blob/_too_large.html.haml

-.file-content.code
-  .nothing-here-block
-    The file could not be displayed as it is too large, you can
-    #{link_to('view the raw file', namespace_project_raw_path(@project.namespace, @project, @id), target: '_blank', rel: 'noopener noreferrer')}
-    instead.

app/views/projects/blob/_viewer.html.haml

+- hidden = local_assigns.fetch(:hidden, false)
+- render_error = viewer.render_error
+- load_asynchronously = local_assigns.fetch(:load_asynchronously, viewer.server_side?) && render_error.nil?
+
+- url = url_for(params.merge(viewer: viewer.type, format: :json)) if load_asynchronously
+.blob-viewer{ data: { type: viewer.type, url: url }, class: ('hidden' if hidden) }
+  - if load_asynchronously
+    .text-center.prepend-top-default.append-bottom-default
+      = icon('spinner spin 2x', 'aria-hidden' => 'true', 'aria-label' => 'Loading content')
+  - elsif render_error
+    = render 'projects/blob/render_error', viewer: viewer
+  - else
+    - viewer.prepare!
+    = render viewer.partial_path, viewer: viewer

app/views/projects/blob/_viewer_switcher.html.haml

+- if blob.show_viewer_switcher?
+  - simple_viewer = blob.simple_viewer
+  - rich_viewer = blob.rich_viewer
+
+  .btn-group.js-blob-viewer-switcher{ role: "group" }
+    - simple_label = "Display #{simple_viewer.switcher_title}"
+    %button.btn.btn-default.btn-sm.js-blob-viewer-switch-btn.has-tooltip{ 'aria-label' => simple_label, title: simple_label, data: { viewer: 'simple', container: 'body' } }>
+      = icon(simple_viewer.switcher_icon)
+
+    - rich_label = "Display #{rich_viewer.switcher_title}"
+    %button.btn.btn-default.btn-sm.js-blob-viewer-switch-btn.has-tooltip{ 'aria-label' => rich_label, title: rich_label, data: { viewer: 'rich', container: 'body' } }>
+      = icon(rich_viewer.switcher_icon)

app/views/projects/blob/show.html.haml

@@ -2,6 +2,9 @@
 - page_title @blob.path, @ref
 = render "projects/commits/head"
 
+- content_for :page_specific_javascripts do
+  = page_specific_javascript_bundle_tag('blob')
+
 %div{ class: container_class }
   = render 'projects/last_push'
 

app/views/projects/blob/_download.html.haml → app/views/projects/blob/viewers/_download.html.haml

 .file-content.blob_file.blob-no-preview
   .center
-    = link_to namespace_project_raw_path(@project.namespace, @project, @id) do
+    = link_to blob_raw_url do
       %h1.light
-        %i.fa.fa-download
+        = icon('download')
       %h4
-        Download (#{number_to_human_size blob_size(blob)})
+        Download (#{number_to_human_size(viewer.blob.raw_size)})

app/views/projects/blob/viewers/_empty.html.haml

+.file-content.code
+  .nothing-here-block
+    Empty file

app/views/projects/blob/viewers/_image.html.haml

+.file-content.image_file
+  %img{ src: blob_raw_url, alt: viewer.blob.name }

app/views/projects/blob/viewers/_markup.html.haml

+- blob = viewer.blob
+.file-content.wiki
+  = markup(blob.name, blob.data)

app/views/projects/blob/_notebook.html.haml → app/views/projects/blob/viewers/_notebook.html.haml

@@ -2,4 +2,4 @@
   = page_specific_javascript_bundle_tag('common_vue')
   = page_specific_javascript_bundle_tag('notebook_viewer')
 
-.file-content#js-notebook-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }
+.file-content#js-notebook-viewer{ data: { endpoint: blob_raw_url } }

app/views/projects/blob/_pdf.html.haml → app/views/projects/blob/viewers/_pdf.html.haml

@@ -2,4 +2,4 @@
   = page_specific_javascript_bundle_tag('common_vue')
   = page_specific_javascript_bundle_tag('pdf_viewer')
 
-.file-content#js-pdf-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }
+.file-content#js-pdf-viewer{ data: { endpoint: blob_raw_url } }

app/views/projects/blob/_sketch.html.haml → app/views/projects/blob/viewers/_sketch.html.haml

@@ -2,6 +2,6 @@
   = page_specific_javascript_bundle_tag('common_vue')
   = page_specific_javascript_bundle_tag('sketch_viewer')
 
-.file-content#js-sketch-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }
+.file-content#js-sketch-viewer{ data: { endpoint: blob_raw_url } }
   .js-loading-icon.text-center.prepend-top-default.append-bottom-default.js-loading-icon{ 'aria-label' => 'Loading Sketch preview' }
     = icon('spinner spin 2x', 'aria-hidden' => 'true');

app/views/projects/blob/_stl.html.haml → app/views/projects/blob/viewers/_stl.html.haml

@@ -2,7 +2,7 @@
   = page_specific_javascript_bundle_tag('stl_viewer')
 
 .file-content.is-stl-loading
-  .text-center#js-stl-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }
+  .text-center#js-stl-viewer{ data: { endpoint: blob_raw_url } }
     = icon('spinner spin 2x', class: 'prepend-top-default append-bottom-default', 'aria-hidden' => 'true', 'aria-label' => 'Loading')
   .text-center.prepend-top-default.append-bottom-default.stl-controls
     .btn-group

app/views/projects/blob/viewers/_svg.html.haml

+- blob = viewer.blob
+- data = sanitize_svg_data(blob.data)
+.file-content.image_file
+  %img{ src: "data:#{blob.mime_type};base64,#{Base64.encode64(data)}", alt: blob.name }

app/views/projects/blob/viewers/_text.html.haml

+= render 'shared/file_highlight', blob: viewer.blob, repository: @repository

app/views/projects/diffs/_content.html.haml

@@ -3,9 +3,9 @@
   - return unless blob.respond_to?(:text?)
   - if diff_file.too_large?
     .nothing-here-block This diff could not be displayed because it is too large.
-  - elsif blob.only_display_raw?
+  - elsif blob.too_large?
     .nothing-here-block The file could not be displayed because it is too large.
-  - elsif blob_text_viewable?(blob)
+  - elsif blob.readable_text?
     - if !project.repository.diffable?(blob)
       .nothing-here-block This diff was suppressed by a .gitattributes entry.
     - elsif diff_file.collapsed?

app/views/projects/diffs/_diffs.html.haml

@@ -27,7 +27,7 @@
     - diff_commit = commit_for_diff(diff_file)
     - blob = diff_file.blob(diff_commit)
     - next unless blob
-    - blob.load_all_data!(diffs.project.repository) unless blob.only_display_raw?
+    - blob.load_all_data!(diffs.project.repository) unless blob.too_large?
     - file_hash = hexdigest(diff_file.file_path)
 
     = render 'projects/diffs/file', file_hash: file_hash, project: diffs.project,

app/views/projects/diffs/_file.html.haml

@@ -6,7 +6,7 @@
 
     - unless diff_file.submodule?
       .file-actions.hidden-xs
-        - if blob_text_viewable?(blob)
+        - if blob.readable_text?
           = link_to '#', class: 'js-toggle-diff-comments btn active has-tooltip', title: "Toggle comments for this file", disabled: @diff_notes_disabled do
             = icon('comment')
           \

app/views/shared/milestones/_sidebar.html.haml

@@ -89,7 +89,7 @@
       .sidebar-collapsed-icon
         %strong
           = icon('exclamation', 'aria-hidden': 'true')
-        %span= milestone.issues_visible_to_user(current_user).count
+        %span= milestone.merge_requests.count
       .title.hide-collapsed
         Merge requests
         %span.badge= milestone.merge_requests.count

app/views/shared/projects/_project.html.haml

@@ -54,5 +54,5 @@
             = number_with_delimiter(project.star_count)
         %span.prepend-left-10.visibility-icon.has-tooltip{ data: { container: 'body', placement: 'left' }, title: visibility_icon_description(project) }
           = visibility_level_icon(project.visibility_level, fw: true)
-      .prepend-top-5
+      .prepend-top-0
         updated #{updated_tooltip}

app/views/shared/snippets/_blob.html.haml

@@ -9,7 +9,7 @@
 
   .file-actions.hidden-xs
     .btn-group{ role: "group" }<
-      = copy_blob_content_button(@snippet)
+      = copy_blob_source_button(@snippet)
       = open_raw_file_button(raw_path)
 
       - if defined?(download_path) && download_path

changelogs/unreleased/29181-add-more-tests-for-spec-controllers-projects-builds-controller-spec-rb.yml

+---
+title: Resolve "Add more tests for spec/controllers/projects/builds_controller_spec.rb"
+merge_request: 10244
+author: dosuken123

changelogs/unreleased/31138-improve-test-settings-for-services-in-empty-projects.yml

+---
+title: Improves test settings for chat notification services for empty projects
+merge_request: 10886
+author:

changelogs/unreleased/31292-milestone-sidebar-display-incorect-number-of-mr-when-minimized.yml

+---
+title: Fixed milestone sidebar showing incorrect number of MRs when collapsed
+merge_request: 10933
+author:

changelogs/unreleased/dm-blob-viewers.yml

+---
+title: Add Source/Rendered switch to blobs for SVG, Markdown, Asciidoc and other text
+  files that can be rendered
+merge_request:
+author:

changelogs/unreleased/dm-fix-ghost-user-validation.yml

+---
+title: Skip validation when creating internal (ghost, service desk) users
+merge_request:
+author:

changelogs/unreleased/fix_build_header_line_height.yml

+---
+title: Change line-height on build-header so elements don't overlap
+merge_request:
+author: Dino Maric

changelogs/unreleased/make_markdown_tables_thinner.yml

+---
+title: Make markdown tables thinner
+merge_request: 10909
+author: blackst0ne

changelogs/unreleased/related-branch-ci-status-icon-alignment.yml

+---
+title: Fixed alignment of CI icon in issues related branches
+merge_request:
+author:

config/routes/project.rb

@@ -173,7 +173,7 @@ constraints(ProjectUrlConstrainer.new) do
           post :retry
           post :play
           post :erase
-          get :trace
+          get :trace, defaults: { format: 'json' }
           get :raw
         end
 

db/migrate/20170421102337_remove_nil_type_services.rb

+class RemoveNilTypeServices < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def up
+    execute <<-SQL
+      DELETE FROM services WHERE type IS NULL OR type = '';
+    SQL
+  end
+
+  def down
+  end
+end

doc/integration/chat_commands.md

 # Chat Commands
 
-Chat commands allow user to perform common operations on GitLab right from there chat client.
-Right now both Mattermost and Slack are supported.
+Chat commands in Mattermost and Slack (also called Slack slash commands) allow you to control GitLab and view GitLab content right inside your chat client, without having to leave it. For Slack, this requires a [project service configuration](../user/project/integrations/slack_slash_commands.md). Simply type the command as a message in your chat client to activate it. 
 
-## Available commands
+Commands are scoped to a project, with a trigger term that is specified during configuration. (We suggest you use the project name as the trigger term for simplicty and clarity.) Taking the trigger term as `project-name`, the commands are:
 
-The trigger is configurable, but for the sake of this example, we'll use `/trigger`
 
-* `/trigger help` - Displays all available commands for this user
-* `/trigger issue new <title> <shift+return> <description>` - creates a new issue on the project
-* `/trigger issue show <id>` - Shows the issue with the given ID, if you've got access
-* `/trigger issue search <query>` - Shows a maximum of 5 items matching the query
-* `/trigger deploy <from> to <to>` - Deploy from an environment to another
+| Command | Effect |
+| ------- | ------ |
+| `/project-name help` | Shows all available chat commands |
+| `/project-name issue new <title> <shift+return> <description>` | Creates a new issue with title `<title>` and description `<description>` |
+| `/project-name issue show <id>` | Shows the issue with id `<id>` |
+| `/project-name issue search <query>` | Shows up to 5 issues matching `<query>` |
+| `/project-name deploy <from> to <to>` | Deploy from the `<from>` environment to the `<to>` environment |
\ No newline at end of file

doc/user/project/integrations/project_services.md

@@ -49,8 +49,8 @@ Click on the service links to see further configuration instructions and details
 | [Mattermost Notifications](mattermost.md) | Receive event notifications in Mattermost |
 | [Microsoft teams](microsoft_teams.md) |  Receive notifications for actions that happen on GitLab into a room on Microsoft Teams using Office 365 Connectors |
 | Pipelines emails | Email the pipeline status to a list of recipients |
-| [Slack Notifications](slack.md) | Receive event notifications in Slack |
-| [Slack slash commands](slack_slash_commands.md) | Slack chat and ChatOps slash commands |
+| [Slack Notifications](slack.md) | Send GitLab events (e.g. issue created) to Slack as notifications |
+| [Slack slash commands](slack_slash_commands.md) | Use slash commands in Slack to control GitLab |
 | PivotalTracker | Project Management Software (Source Commits Endpoint) |
 | [Prometheus](prometheus.md) | Monitor the performance of your deployed apps |
 | Pushover | Pushover makes it easy to get real-time notifications on your Android device, iPhone, iPad, and Desktop |

doc/user/project/integrations/slack.md

 # Slack Notifications Service
 
-## On Slack
+The Slack Notifications Service allows your GitLab project to send events (e.g. issue created) to your existing Slack team as notifications. This requires configurations in both Slack and GitLab.
 
-To enable Slack integration you must create an incoming webhook integration on
-Slack:
+> Note: You can also use Slack slash commands to control GitLab inside Slack. This is the separately configured [Slack slash commands](slack_slash_commands.md).
 
-1. [Sign in to Slack](https://slack.com/signin)
-1. Visit [Incoming WebHooks](https://my.slack.com/services/new/incoming-webhook/)
-1. Choose the channel name you want to send notifications to.
-1. Click **Add Incoming WebHooks Integration**
-1. Copy the **Webhook URL**, we'll need this later for GitLab.
+## Slack Configuration
 
-## On GitLab
+1. Sign in to your Slack team and [start a new Incoming WebHooks configuration](https://my.slack.com/services/new/incoming-webhook/).
+1. Select the Slack channel where notifications will be sent to by default. Click the **Add Incoming WebHooks integration** button to add the configuration.
+1. Copy the **Webhook URL**, which we'll use later in the GitLab configuration.
 
-After you set up Slack, it's time to set up GitLab.
+## GitLab Configuration
 
-Navigate to the [Integrations page](project_services.md#accessing-the-project-services)
-and select the **Slack notifications** service to configure it.
-There, you will see a checkbox with the following events that can be triggered:
+1. Navigate to the [Integrations page](project_services.md#accessing-the-project-services) in your project's settings, i.e. **Project > Settings > Integrations**.
+1. Select the **Slack notifications** project service to configure it.
+1. Check the **Active** checkbox to turn on the service.
+1. Check the checkboxes corresponding to the GitLab events you want to send to Slack as a notification.
+1. For each event, optionally enter the Slack channel where you want to send the event. (Do _not_ include the `#` symbol.) If left empty, the event will be sent to the default channel that you configured in the Slack Configuration step.
+1. Paste the **Webhook URL** that you copied from the Slack Configuration step.
+1. Optionally customize the Slack bot username that will be sending the notifications.
+1. Configure the remaining options and click `Save changes`.
 
-- Push
-- Issue
-- Confidential issue
-- Merge request
-- Note
-- Tag push
-- Pipeline
-- Wiki page
-
-Below each of these event checkboxes, you have an input field to enter
-which Slack channel you want to send that event message. Enter your preferred channel name **without** the hash sign (`#`).
-
-At the end, fill in your Slack details:
-
-| Field | Description |
-| ----- | ----------- |
-| **Webhook**  | The [incoming webhook URL][slackhook] which you have to setup on Slack. |
-| **Username** | Optional username which can be on messages sent to Slack. Fill this in if you want to change the username of the bot. |
-| **Notify only broken pipelines** | If you choose to enable the **Pipeline** event and you want to be only notified about failed pipelines. |
-
-After you are all done, click **Save changes** for the changes to take effect.
-
->**Note:**
-You can set "branch,pushed,Compare changes" as highlight words on your Slack
-profile settings, so that you can be aware of new commits when somebody pushes
-them.
+Your Slack team will now start receiving GitLab event notifications as configured.
 
 ![Slack configuration](img/slack_configuration.png)
\ No newline at end of file
-
-[slackhook]: https://my.slack.com/services/new/incoming-webhook

doc/user/project/integrations/slack_slash_commands.md

@@ -2,23 +2,22 @@
 
 > Introduced in GitLab 8.15
 
-Slack commands give users an extra interface to perform common operations
-from the chat environment. This allows one to, for example, create an issue as
-soon as the idea was discussed in chat.
-For all available commands try the help subcommand, for example: `/gitlab help`,
-all review the [full list of commands](../../../integration/chat_commands.md).
+Slack slash commands (also known as chat commmands) allow you to control GitLab and view content right inside Slack, without having to leave it. This requires configurations in both Slack and GitLab. 
 
-## Prerequisites
-
-A [team](https://get.slack.help/hc/en-us/articles/217608418-Creating-a-team) in
-Slack should be created beforehand, GitLab cannot create it for you.
+> Note: GitLab can also send events (e.g. issue created) to Slack as notifications. This is the separately configured [Slack Notifications Service](slack.md).
 
 ## Configuration
 
-Go to your project's [Integrations page](project_services.md#accessing-the-project-services)
-and select the **Slack slash commands** service to configure it.
+1. Slack slash commands are scoped to a project. Navigate to the [Integrations page](project_services.md#accessing-the-project-services) in your project's settings, i.e. **Project > Settings > Integrations**.
+1. Select the **Slack slash commands** project service to configure it. This page contains required information to complete the configuration in Slack. Leave this browser tab open.
+1. Open a new browser tab and sign in to your Slack team. [Start a new Slash Commands integration](https://my.slack.com/services/new/slash-commands).
+1. Enter a trigger term. We suggest you use the project name. Click **Add Slash Command Integration**.
+1. Complete the rest of the fields in the Slack configuration page using information from the GitLab browser tab. In particular, the URL needs to be copied and pasted. Click **Save Integration** to complete the configuration in Slack.
+1. While still on the Slack configuration page, copy the **token**. Go back to the GitLab browser tab and paste in the **token**.
+1. Check the **Active** checkbox and click **Save changes** to complete the configuration in GitLab.
 
 ![Slack setup instructions](img/slack_setup.png)
 
-Once you've followed the instructions, mark the service as active and insert the token
-you've received from Slack. After saving the service you are good to go!
+## Usage
+
+You can now use the [Slack slash commands](../../../integration/chat_commands.md).
\ No newline at end of file

features/project/source/browse_files.feature

@@ -11,6 +11,7 @@ Feature: Project Source Browse Files
     Given I visit project source page for "6d39438"
     Then I should see files from repository for "6d39438"
     
+  @javascript
   Scenario: I browse file content
     Given I click on ".gitignore" file in repo
     Then I should see its content

features/project/source/markdown_render.feature

@@ -6,11 +6,13 @@ Feature: Project Source Markdown Render
 
   # Tree README
 
+  @javascript
   Scenario: Tree view should have correct links in README
     Given I go directory which contains README file
     And I click on a relative link in README
     Then I should see the correct markdown
 
+  @javascript
   Scenario: I browse files from markdown branch
     Then I should see files from repository in markdown
     And I should see rendered README which contains correct links
@@ -29,36 +31,42 @@ Feature: Project Source Markdown Render
     And I click on GitLab API doc directory in README
     Then I should see correct doc/api directory rendered
 
+  @javascript
   Scenario: I view README in markdown branch to see reference links to file
     Then I should see files from repository in markdown
     And I should see rendered README which contains correct links
     And I click on Maintenance in README
     Then I should see correct maintenance file rendered
 
+  @javascript
   Scenario: README headers should have header links
     Then I should see rendered README which contains correct links
     And Header "Application details" should have correct id and link
 
   # Blob
 
+  @javascript
   Scenario: I navigate to doc directory to view documentation in markdown
     And I navigate to the doc/api/README
     And I see correct file rendered
     And I click on users in doc/api/README
     Then I should see the correct document file
 
+  @javascript
   Scenario: I navigate to doc directory to view user doc in markdown
     And I navigate to the doc/api/README
     And I see correct file rendered
     And I click on raketasks in doc/api/README
     Then I should see correct directory rendered
 
+  @javascript
   Scenario: I navigate to doc directory to view user doc in markdown
     And I navigate to the doc/api/README
     And Header "GitLab API" should have correct id and link
 
   # Markdown branch
 
+  @javascript
   Scenario: I browse files from markdown branch
     When I visit markdown branch
     Then I should see files from repository in markdown branch
@@ -73,6 +81,7 @@ Feature: Project Source Markdown Render
     And I click on Rake tasks in README
     Then I should see correct directory rendered for markdown branch
 
+  @javascript
   Scenario: I navigate to doc directory to view documentation in markdown branch
     When I visit markdown branch
     And I navigate to the doc/api/README
@@ -80,6 +89,7 @@ Feature: Project Source Markdown Render
     And I click on users in doc/api/README
     Then I should see the users document file in markdown branch
 
+  @javascript
   Scenario: I navigate to doc directory to view user doc in markdown branch
     When I visit markdown branch
     And I navigate to the doc/api/README
@@ -87,6 +97,7 @@ Feature: Project Source Markdown Render
     And I click on raketasks in doc/api/README
     Then I should see correct directory rendered for markdown branch
 
+  @javascript
   Scenario: Tree markdown links view empty urls should have correct urls
     When I visit markdown branch
     Then The link with text "empty" should have url "tree/markdown"
@@ -99,6 +110,7 @@ Feature: Project Source Markdown Render
 
   # "ID" means "#id" on the tests below, because we are unable to escape the hash sign.
   # which Spinach interprets as the start of a comment.
+  @javascript
   Scenario: All markdown links with ids should have correct urls
     When I visit markdown branch
     Then The link with text "ID" should have url "tree/markdownID"

features/steps/project/source/browse_files.rb

@@ -4,6 +4,7 @@ class Spinach::Features::ProjectSourceBrowseFiles < Spinach::FeatureSteps
   include SharedProject
   include SharedPaths
   include RepoHelpers
+  include WaitForAjax
 
   step "I don't have write access" do
     @project = create(:project, :repository, name: "Other Project", path: "other-project")
@@ -36,10 +37,12 @@ class Spinach::Features::ProjectSourceBrowseFiles < Spinach::FeatureSteps
   end
 
   step 'I should see its content' do
+    wait_for_ajax
     expect(page).to have_content old_gitignore_content
   end
 
   step 'I should see its new content' do
+    wait_for_ajax
     expect(page).to have_content new_gitignore_content
   end
 

features/steps/project/source/markdown_render.rb

@@ -5,6 +5,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   include SharedAuthentication
   include SharedPaths
   include SharedMarkdown
+  include WaitForAjax
 
   step 'I own project "Delta"' do
     @project = ::Project.find_by(name: "Delta")
@@ -34,6 +35,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I should see correct document rendered' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/api/README.md")
+    wait_for_ajax
     expect(page).to have_content "All API requests require authentication"
   end
 
@@ -63,6 +65,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I should see correct maintenance file rendered' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/raketasks/maintenance.md")
+    wait_for_ajax
     expect(page).to have_content "bundle exec rake gitlab:env:info RAILS_ENV=production"
   end
 
@@ -94,6 +97,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I see correct file rendered' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/api/README.md")
+    wait_for_ajax
     expect(page).to have_content "Contents"
     expect(page).to have_link "Users"
     expect(page).to have_link "Rake tasks"
@@ -138,6 +142,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I see correct file rendered in markdown branch' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/api/README.md")
+    wait_for_ajax
     expect(page).to have_content "Contents"
     expect(page).to have_link "Users"
     expect(page).to have_link "Rake tasks"
@@ -145,6 +150,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I should see correct document rendered for markdown branch' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/api/README.md")
+    wait_for_ajax
     expect(page).to have_content "All API requests require authentication"
   end
 
@@ -162,6 +168,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   # Expected link contents
 
   step 'The link with text "empty" should have url "tree/markdown"' do
+    wait_for_ajax
     find('a', text: /^empty$/)['href'] == current_host + namespace_project_tree_path(@project.namespace, @project, "markdown")
   end
 
@@ -197,6 +204,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   end
 
   step 'The link with text "ID" should have url "blob/markdown/README.mdID"' do
+    wait_for_ajax
     find('a', text: /^#id$/)['href'] == current_host + namespace_project_blob_path(@project.namespace, @project, "markdown/README.md") + '#id'
   end
 
@@ -291,10 +299,12 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'I should see the correct markdown' do
     expect(current_path).to eq namespace_project_blob_path(@project.namespace, @project, "markdown/doc/api/users.md")
+    wait_for_ajax
     expect(page).to have_content "List users"
   end
 
   step 'Header "Application details" should have correct id and link' do
+    wait_for_ajax
     header_should_have_correct_id_and_link(2, 'Application details', 'application-details')
   end
 

features/steps/shared/markdown.rb

@@ -3,7 +3,7 @@ module SharedMarkdown
 
   def header_should_have_correct_id_and_link(level, text, id, parent = ".wiki")
     node = find("#{parent} h#{level} a#user-content-#{id}")
-    expect(node[:href]).to eq "##{id}"
+    expect(node[:href]).to end_with "##{id}"
 
     # Work around a weird Capybara behavior where calling `parent` on a node
     # returns the whole document, not the node's actual parent element

lib/gitlab/data_builder/push.rb

@@ -41,7 +41,7 @@ module Gitlab
         type = Gitlab::Git.tag_ref?(ref) ? 'tag_push' : 'push'
 
         # Hash to be passed as post_receive_data
-        data = {
+        {
           object_kind: type,
           event_name: type,
           before: oldrev,
@@ -61,16 +61,15 @@ module Gitlab
           repository: project.hook_attrs.slice(:name, :url, :description, :homepage,
                                                :git_http_url, :git_ssh_url, :visibility_level)
         }
-
-        data
       end
 
       # This method provide a sample data generated with
       # existing project and commits to test webhooks
       def build_sample(project, user)
-        commits = project.repository.commits(project.default_branch, limit: 3)
         ref = "#{Gitlab::Git::BRANCH_REF_PREFIX}#{project.default_branch}"
-        build(project, user, commits.last.id, commits.first.id, ref, commits)
+        commits = project.repository.commits(project.default_branch.to_s, limit: 3) rescue []
+
+        build(project, user, commits.last&.id, commits.first&.id, ref, commits)
       end
 
       def checkout_sha(repository, newrev, ref)

lib/gitlab/git/blob.rb

@@ -109,10 +109,6 @@ module Gitlab
         @binary.nil? ? super : @binary == true
       end
 
-      def empty?
-        !data || data == ''
-      end
-
       def data
         encode! @data
       end

scripts/prepare_build.sh

@@ -32,7 +32,7 @@ sed -i 's/localhost/redis/g' config/resque.yml
 cp config/gitlab.yml.example config/gitlab.yml
 
 if [ "$USE_BUNDLE_INSTALL" != "false" ]; then
-    retry bundle install --clean $BUNDLE_INSTALL_FLAGS
+    retry bundle install --clean $BUNDLE_INSTALL_FLAGS && bundle check
 fi
 
 # Only install knapsack after bundle install! Otherwise oddly some native

spec/controllers/projects/builds_controller_spec.rb

 require 'spec_helper'
 
 describe Projects::BuildsController do
-  let(:user) { create(:user) }
+  include ApiHelpers
+
   let(:project) { create(:empty_project, :public) }
+  let(:pipeline) { create(:ci_pipeline, project: project) }
+  let(:user) { create(:user) }
 
+  describe 'GET index' do
+    context 'when scope is pending' do
       before do
-    sign_in(user)
+        create(:ci_build, :pending, pipeline: pipeline)
+
+        get_index(scope: 'pending')
+      end
+
+      it 'has only pending builds' do
+        expect(response).to have_http_status(:ok)
+        expect(assigns(:builds).first.status).to eq('pending')
+      end
+    end
+
+    context 'when scope is running' do
+      before do
+        create(:ci_build, :running, pipeline: pipeline)
+
+        get_index(scope: 'running')
+      end
+
+      it 'has only running builds' do
+        expect(response).to have_http_status(:ok)
+        expect(assigns(:builds).first.status).to eq('running')
+      end
+    end
+
+    context 'when scope is finished' do
+      before do
+        create(:ci_build, :success, pipeline: pipeline)
+
+        get_index(scope: 'finished')
+      end
+
+      it 'has only finished builds' do
+        expect(response).to have_http_status(:ok)
+        expect(assigns(:builds).first.status).to eq('success')
+      end
+    end
+
+    context 'when page is specified' do
+      let(:last_page) { project.builds.page.total_pages }
+
+      context 'when page number is eligible' do
+        before do
+          create_list(:ci_build, 2, pipeline: pipeline)
+
+          get_index(page: last_page.to_param)
+        end
+
+        it 'redirects to the page' do
+          expect(response).to have_http_status(:ok)
+          expect(assigns(:builds).current_page).to eq(last_page)
+        end
+      end
     end
 
-  describe 'GET index' do
     context 'number of queries' do
       before do
         Ci::Build::AVAILABLE_STATUSES.each do |status|
@@ -23,13 +78,8 @@ describe Projects::BuildsController do
         RequestStore.clear!
       end
 
-      def render
-        get :index, namespace_id: project.namespace,
-                    project_id: project
-      end
-
       it "verifies number of queries" do
-        recorded = ActiveRecord::QueryRecorder.new { render }
+        recorded = ActiveRecord::QueryRecorder.new { get_index }
         expect(recorded.count).to be_within(5).of(8)
       end
 
@@ -39,10 +89,83 @@ describe Projects::BuildsController do
           pipeline: pipeline, name: name, status: status)
       end
     end
+
+    def get_index(**extra_params)
+      params = {
+        namespace_id: project.namespace.to_param,
+        project_id: project
+      }
+
+      get :index, params.merge(extra_params)
+    end
+  end
+
+  describe 'GET show' do
+    context 'when build exists' do
+      let!(:build) { create(:ci_build, pipeline: pipeline) }
+
+      before do
+        get_show(id: build.id)
+      end
+
+      it 'has a build' do
+        expect(response).to have_http_status(:ok)
+        expect(assigns(:build).id).to eq(build.id)
+      end
+    end
+
+    context 'when build does not exist' do
+      before do
+        get_show(id: 1234)
+      end
+
+      it 'renders not_found' do
+        expect(response).to have_http_status(:not_found)
+      end
+    end
+
+    def get_show(**extra_params)
+      params = {
+        namespace_id: project.namespace.to_param,
+        project_id: project
+      }
+
+      get :show, params.merge(extra_params)
+    end
+  end
+
+  describe 'GET trace.json' do
+    before do
+      get_trace
+    end
+
+    context 'when build has a trace' do
+      let(:build) { create(:ci_build, :trace, pipeline: pipeline) }
+
+      it 'returns a trace' do
+        expect(response).to have_http_status(:ok)
+        expect(json_response['html']).to eq('BUILD TRACE')
+      end
+    end
+
+    context 'when build has no traces' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+
+      it 'returns no traces' do
+        expect(response).to have_http_status(:ok)
+        expect(json_response['html']).to be_nil
+      end
+    end
+
+    def get_trace
+      get :trace, namespace_id: project.namespace,
+                  project_id: project,
+                  id: build.id,
+                  format: :json
+    end
   end
 
   describe 'GET status.json' do
-    let(:pipeline) { create(:ci_pipeline, project: project) }
     let(:build) { create(:ci_build, pipeline: pipeline) }
     let(:status) { build.detailed_status(double('user')) }
 
@@ -71,6 +194,7 @@ describe Projects::BuildsController do
       before do
         project.add_developer(user)
         sign_in(user)
+
         get_trace
       end
 
@@ -84,6 +208,7 @@ describe Projects::BuildsController do
     context 'when user is logged in as non member' do
       before do
         sign_in(user)
+
         get_trace
       end
 
@@ -101,4 +226,221 @@ describe Projects::BuildsController do
                   format: :json
     end
   end
+
+  describe 'POST retry' do
+    before do
+      project.add_developer(user)
+      sign_in(user)
+
+      post_retry
+    end
+
+    context 'when build is retryable' do
+      let(:build) { create(:ci_build, :retryable, pipeline: pipeline) }
+
+      it 'redirects to the retried build page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_build_path(id: Ci::Build.last.id))
+      end
+    end
+
+    context 'when build is not retryable' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+
+      it 'renders unprocessable_entity' do
+        expect(response).to have_http_status(:unprocessable_entity)
+      end
+    end
+
+    def post_retry
+      post :retry, namespace_id: project.namespace,
+                   project_id: project,
+                   id: build.id
+    end
+  end
+
+  describe 'POST play' do
+    before do
+      project.add_developer(user)
+      sign_in(user)
+
+      post_play
+    end
+
+    context 'when build is playable' do
+      let(:build) { create(:ci_build, :playable, pipeline: pipeline) }
+
+      it 'redirects to the played build page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_build_path(id: build.id))
+      end
+
+      it 'transits to pending' do
+        expect(build.reload).to be_pending
+      end
+    end
+
+    context 'when build is not playable' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+
+      it 'renders unprocessable_entity' do
+        expect(response).to have_http_status(:unprocessable_entity)
+      end
+    end
+
+    def post_play
+      post :play, namespace_id: project.namespace,
+                  project_id: project,
+                  id: build.id
+    end
+  end
+
+  describe 'POST cancel' do
+    before do
+      project.add_developer(user)
+      sign_in(user)
+
+      post_cancel
+    end
+
+    context 'when build is cancelable' do
+      let(:build) { create(:ci_build, :cancelable, pipeline: pipeline) }
+
+      it 'redirects to the canceled build page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_build_path(id: build.id))
+      end
+
+      it 'transits to canceled' do
+        expect(build.reload).to be_canceled
+      end
+    end
+
+    context 'when build is not cancelable' do
+      let(:build) { create(:ci_build, :canceled, pipeline: pipeline) }
+
+      it 'returns unprocessable_entity' do
+        expect(response).to have_http_status(:unprocessable_entity)
+      end
+    end
+
+    def post_cancel
+      post :cancel, namespace_id: project.namespace,
+                    project_id: project,
+                    id: build.id
+    end
+  end
+
+  describe 'POST cancel_all' do
+    before do
+      project.add_developer(user)
+      sign_in(user)
+    end
+
+    context 'when builds are cancelable' do
+      before do
+        create_list(:ci_build, 2, :cancelable, pipeline: pipeline)
+
+        post_cancel_all
+      end
+
+      it 'redirects to a index page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_builds_path)
+      end
+
+      it 'transits to canceled' do
+        expect(Ci::Build.all).to all(be_canceled)
+      end
+    end
+
+    context 'when builds are not cancelable' do
+      before do
+        create_list(:ci_build, 2, :canceled, pipeline: pipeline)
+
+        post_cancel_all
+      end
+
+      it 'redirects to a index page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_builds_path)
+      end
+    end
+
+    def post_cancel_all
+      post :cancel_all, namespace_id: project.namespace,
+                        project_id: project
+    end
+  end
+
+  describe 'POST erase' do
+    before do
+      project.add_developer(user)
+      sign_in(user)
+
+      post_erase
+    end
+
+    context 'when build is erasable' do
+      let(:build) { create(:ci_build, :erasable, :trace, pipeline: pipeline) }
+
+      it 'redirects to the erased build page' do
+        expect(response).to have_http_status(:found)
+        expect(response).to redirect_to(namespace_project_build_path(id: build.id))
+      end
+
+      it 'erases artifacts' do
+        expect(build.artifacts_file.exists?).to be_falsey
+        expect(build.artifacts_metadata.exists?).to be_falsey
+      end
+
+      it 'erases trace' do
+        expect(build.trace.exist?).to be_falsey
+      end
+    end
+
+    context 'when build is not erasable' do
+      let(:build) { create(:ci_build, :erased, pipeline: pipeline) }
+
+      it 'returns unprocessable_entity' do
+        expect(response).to have_http_status(:unprocessable_entity)
+      end
+    end
+
+    def post_erase
+      post :erase, namespace_id: project.namespace,
+                   project_id: project,
+                   id: build.id
+    end
+  end
+
+  describe 'GET raw' do
+    before do
+      get_raw
+    end
+
+    context 'when build has a trace file' do
+      let(:build) { create(:ci_build, :trace, pipeline: pipeline) }
+
+      it 'send a trace file' do
+        expect(response).to have_http_status(:ok)
+        expect(response.content_type).to eq 'text/plain; charset=utf-8'
+        expect(response.body).to eq 'BUILD TRACE'
+      end
+    end
+
+    context 'when build does not have a trace file' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+
+      it 'returns not_found' do
+        expect(response).to have_http_status(:not_found)
+      end
+    end
+
+    def get_raw
+      post :raw, namespace_id: project.namespace,
+                 project_id: project,
+                 id: build.id
+    end
+  end
 end

spec/controllers/projects/services_controller_spec.rb

@@ -8,6 +8,7 @@ describe Projects::ServicesController do
   before do
     sign_in(user)
     project.team << [user, :master]
+
     controller.instance_variable_set(:@project, project)
     controller.instance_variable_set(:@service, service)
   end
@@ -18,20 +19,60 @@ describe Projects::ServicesController do
     end
 
     describe "#test" do
+      context 'when can_test? returns false' do
+        it 'renders 404' do
+          allow_any_instance_of(Service).to receive(:can_test?).and_return(false)
+
+          get :test, namespace_id: project.namespace.id, project_id: project.id, id: service.id, format: :html
+
+          expect(response).to have_http_status(404)
+        end
+      end
+
       context 'success' do
+        context 'with empty project' do
+          let(:project) { create(:empty_project) }
+
+          context 'with chat notification service' do
+            let(:service) { project.create_microsoft_teams_service(webhook: 'http://webhook.com') }
+
+            it 'redirects and show success message' do
+              allow_any_instance_of(MicrosoftTeams::Notifier).to receive(:ping).and_return(true)
+
+              get :test, namespace_id: project.namespace.id, project_id: project.id, id: service.id, format: :html
+
+              expect(response).to redirect_to(root_path)
+              expect(flash[:notice]).to eq('We sent a request to the provided URL')
+            end
+          end
+
+          it 'redirects and show success message' do
+            expect(service).to receive(:test).and_return(success: true, result: 'done')
+
+            get :test, namespace_id: project.namespace.id, project_id: project.id, id: service.id, format: :html
+
+            expect(response).to redirect_to(root_path)
+            expect(flash[:notice]).to eq('We sent a request to the provided URL')
+          end
+        end
+
         it "redirects and show success message" do
-          expect(service).to receive(:test).and_return({ success: true, result: 'done' })
+          expect(service).to receive(:test).and_return(success: true, result: 'done')
+
           get :test, namespace_id: project.namespace.id, project_id: project.id, id: service.id, format: :html
-          expect(response.status).to redirect_to('/')
+
+          expect(response).to redirect_to(root_path)
           expect(flash[:notice]).to eq('We sent a request to the provided URL')
         end
       end
 
       context 'failure' do
         it "redirects and show failure message" do
-          expect(service).to receive(:test).and_return({ success: false, result: 'Bad test' })
+          expect(service).to receive(:test).and_return(success: false, result: 'Bad test')
+
           get :test, namespace_id: project.namespace.id, project_id: project.id, id: service.id, format: :html
-          expect(response.status).to redirect_to('/')
+
+          expect(response).to redirect_to(root_path)
           expect(flash[:alert]).to eq('We tried to send a request to the provided URL but an error occurred: Bad test')
         end
       end

spec/factories/ci/builds.rb

@@ -79,6 +79,19 @@ FactoryGirl.define do
       manual
     end
 
+    trait :retryable do
+      success
+    end
+
+    trait :cancelable do
+      pending
+    end
+
+    trait :erasable do
+      success
+      artifacts
+    end
+
     trait :tags do
       tag_list [:docker, :ruby]
     end

spec/factories/services.rb

 FactoryGirl.define do
   factory :service do
     project factory: :empty_project
+    type 'Service'
+  end
+
+  factory :custom_issue_tracker_service, class: CustomIssueTrackerService do
+    project factory: :empty_project
+    type 'CustomIssueTrackerService'
+    category 'issue_tracker'
+    active true
+    properties(
+      project_url: 'https://project.url.com',
+      issues_url: 'https://issues.url.com',
+      new_issue_url: 'https://newissue.url.com'
+    )
   end
 
   factory :kubernetes_service do

spec/features/copy_as_gfm_spec.rb

@@ -479,6 +479,7 @@ describe 'Copy as GFM', feature: true, js: true do
     context 'from a blob' do
       before do
         visit namespace_project_blob_path(project.namespace, project, File.join('master', 'files/ruby/popen.rb'))
+        wait_for_ajax
       end
 
       context 'selecting one word of text' do
@@ -520,6 +521,7 @@ describe 'Copy as GFM', feature: true, js: true do
     context 'from a GFM code block' do
       before do
         visit namespace_project_blob_path(project.namespace, project, File.join('markdown', 'doc/api/users.md'))
+        wait_for_ajax
       end
 
       context 'selecting one word of text' do

spec/features/projects/blobs/blob_show_spec.rb

 require 'spec_helper'
 
-feature 'File blob', feature: true do
+feature 'File blob', :js, feature: true do
   include TreeHelper
+  include WaitForAjax
 
-  let(:project) { create(:project, :public, :test_repo) }
-  let(:merge_request) { create(:merge_request, source_project: project, source_branch: 'feature', target_branch: 'master') }
-  let(:branch) { 'master' }
-  let(:file_path) { project.repository.ls_files(project.repository.root_ref)[1] }
+  let(:project) { create(:project, :public) }
 
-  context 'anonymous' do
-    context 'from blob file path' do
+  def visit_blob(path, fragment = nil)
+    visit namespace_project_blob_path(project.namespace, project, tree_join('master', path), anchor: fragment)
+  end
+
+  context 'Ruby file' do
+    before do
+      visit_blob('files/ruby/popen.rb')
+
+      wait_for_ajax
+    end
+
+    it 'displays the blob' do
+      aggregate_failures do
+        # shows highlighted Ruby code
+        expect(page).to have_content("require 'fileutils'")
+
+        # does not show a viewer switcher
+        expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+        # shows an enabled copy button
+        expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+      end
+    end
+  end
+
+  context 'Markdown file' do
+    context 'visiting directly' do
+      before do
+        visit_blob('files/markdown/ruby-style-guide.md')
+
+        wait_for_ajax
+      end
+
+      it 'displays the blob' do
+        aggregate_failures do
+          # hides the simple viewer
+          expect(page).to have_selector('.blob-viewer[data-type="simple"]', visible: false)
+          expect(page).to have_selector('.blob-viewer[data-type="rich"]')
+
+          # shows rendered Markdown
+          expect(page).to have_link("PEP-8")
+
+          # shows a viewer switcher
+          expect(page).to have_selector('.js-blob-viewer-switcher')
+
+          # shows a disabled copy button
+          expect(page).to have_selector('.js-copy-blob-source-btn.disabled')
+        end
+      end
+
+      context 'switching to the simple viewer' do
+        before do
+          find('.js-blob-viewer-switch-btn[data-viewer=simple]').click
+
+          wait_for_ajax
+        end
+
+        it 'displays the blob' do
+          aggregate_failures do
+            # hides the rich viewer
+            expect(page).to have_selector('.blob-viewer[data-type="simple"]')
+            expect(page).to have_selector('.blob-viewer[data-type="rich"]', visible: false)
+
+            # shows highlighted Markdown code
+            expect(page).to have_content("[PEP-8](http://www.python.org/dev/peps/pep-0008/)")
+
+            # shows an enabled copy button
+            expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+          end
+        end
+
+        context 'switching to the rich viewer again' do
+          before do
+            find('.js-blob-viewer-switch-btn[data-viewer=rich]').click
+
+            wait_for_ajax
+          end
+
+          it 'displays the blob' do
+            aggregate_failures do
+              # hides the simple viewer
+              expect(page).to have_selector('.blob-viewer[data-type="simple"]', visible: false)
+              expect(page).to have_selector('.blob-viewer[data-type="rich"]')
+
+              # shows an enabled copy button
+              expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+            end
+          end
+        end
+      end
+    end
+
+    context 'visiting with a line number anchor' do
+      before do
+        visit_blob('files/markdown/ruby-style-guide.md', 'L1')
+
+        wait_for_ajax
+      end
+
+      it 'displays the blob' do
+        aggregate_failures do
+          # hides the rich viewer
+          expect(page).to have_selector('.blob-viewer[data-type="simple"]')
+          expect(page).to have_selector('.blob-viewer[data-type="rich"]', visible: false)
+
+          # highlights the line in question
+          expect(page).to have_selector('#LC1.hll')
+
+          # shows highlighted Markdown code
+          expect(page).to have_content("[PEP-8](http://www.python.org/dev/peps/pep-0008/)")
+
+          # shows an enabled copy button
+          expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+        end
+      end
+    end
+  end
+
+  context 'Markdown file (stored in LFS)' do
+    before do
+      project.add_master(project.creator)
+
+      Files::CreateService.new(
+        project,
+        project.creator,
+        start_branch: 'master',
+        branch_name: 'master',
+        commit_message: "Add Markdown in LFS",
+        file_path: 'files/lfs/file.md',
+        file_content: project.repository.blob_at('master', 'files/lfs/lfs_object.iso').data
+      ).execute
+    end
+
+    context 'when LFS is enabled on the project' do
+      before do
+        allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
+        project.update_attribute(:lfs_enabled, true)
+
+        visit_blob('files/lfs/file.md')
+
+        wait_for_ajax
+      end
+
+      it 'displays an error' do
+        aggregate_failures do
+          # hides the simple viewer
+          expect(page).to have_selector('.blob-viewer[data-type="simple"]', visible: false)
+          expect(page).to have_selector('.blob-viewer[data-type="rich"]')
+
+          # shows an error message
+          expect(page).to have_content('The rendered file could not be displayed because it is stored in LFS. You can view the source or download it instead.')
+
+          # shows a viewer switcher
+          expect(page).to have_selector('.js-blob-viewer-switcher')
+
+          # does not show a copy button
+          expect(page).not_to have_selector('.js-copy-blob-source-btn')
+        end
+      end
+
+      context 'switching to the simple viewer' do
+        before do
+          find('.js-blob-viewer-switcher .js-blob-viewer-switch-btn[data-viewer=simple]').click
+
+          wait_for_ajax
+        end
+
+        it 'displays an error' do
+          aggregate_failures do
+            # hides the rich viewer
+            expect(page).to have_selector('.blob-viewer[data-type="simple"]')
+            expect(page).to have_selector('.blob-viewer[data-type="rich"]', visible: false)
+
+            # shows an error message
+            expect(page).to have_content('The source could not be displayed because it is stored in LFS. You can download it instead.')
+
+            # does not show a copy button
+            expect(page).not_to have_selector('.js-copy-blob-source-btn')
+          end
+        end
+      end
+    end
+
+    context 'when LFS is disabled on the project' do
+      before do
+        visit_blob('files/lfs/file.md')
+
+        wait_for_ajax
+      end
+
+      it 'displays the blob' do
+        aggregate_failures do
+          # shows text
+          expect(page).to have_content('size 1575078')
+
+          # does not show a viewer switcher
+          expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+          # shows an enabled copy button
+          expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+        end
+      end
+    end
+  end
+
+  context 'PDF file' do
+    before do
+      project.add_master(project.creator)
+
+      Files::CreateService.new(
+        project,
+        project.creator,
+        start_branch: 'master',
+        branch_name: 'master',
+        commit_message: "Add PDF",
+        file_path: 'files/test.pdf',
+        file_content: File.read(Rails.root.join('spec/javascripts/blob/pdf/test.pdf'))
+      ).execute
+
+      visit_blob('files/test.pdf')
+
+      wait_for_ajax
+    end
+
+    it 'displays the blob' do
+      aggregate_failures do
+        # shows rendered PDF
+        expect(page).to have_selector('.js-pdf-viewer')
+
+        # does not show a viewer switcher
+        expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+        # does not show a copy button
+        expect(page).not_to have_selector('.js-copy-blob-source-btn')
+      end
+    end
+  end
+
+  context 'ISO file (stored in LFS)' do
+    context 'when LFS is enabled on the project' do
+      before do
+        allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
+        project.update_attribute(:lfs_enabled, true)
+
+        visit_blob('files/lfs/lfs_object.iso')
+
+        wait_for_ajax
+      end
+
+      it 'displays the blob' do
+        aggregate_failures do
+          # shows a download link
+          expect(page).to have_link('Download (1.5 MB)')
+
+          # does not show a viewer switcher
+          expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+          # does not show a copy button
+          expect(page).not_to have_selector('.js-copy-blob-source-btn')
+        end
+      end
+    end
+
+    context 'when LFS is disabled on the project' do
+      before do
+        visit_blob('files/lfs/lfs_object.iso')
+
+        wait_for_ajax
+      end
+
+      it 'displays the blob' do
+        aggregate_failures do
+          # shows text
+          expect(page).to have_content('size 1575078')
+
+          # does not show a viewer switcher
+          expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+          # shows an enabled copy button
+          expect(page).to have_selector('.js-copy-blob-source-btn:not(.disabled)')
+        end
+      end
+    end
+  end
+
+  context 'ZIP file' do
     before do
-        visit namespace_project_blob_path(project.namespace, project, tree_join(branch, file_path))
+      visit_blob('Gemfile.zip')
+
+      wait_for_ajax
     end
 
-      it 'updates content' do
-        expect(page).to have_link  'Edit'
+    it 'displays the blob' do
+      aggregate_failures do
+        # shows a download link
+        expect(page).to have_link('Download (2.11 KB)')
+
+        # does not show a viewer switcher
+        expect(page).not_to have_selector('.js-blob-viewer-switcher')
+
+        # does not show a copy button
+        expect(page).not_to have_selector('.js-copy-blob-source-btn')
       end
     end
   end

spec/features/projects/files/browse_files_spec.rb

 require 'spec_helper'
 
-feature 'user browses project', feature: true do
+feature 'user browses project', feature: true, js: true do
   let(:project) { create(:project) }
   let(:user) { create(:user) }
 
@@ -24,6 +24,7 @@ feature 'user browses project', feature: true do
     click_link 'files'
     click_link 'lfs'
     click_link 'lfs_object.iso'
+    wait_for_ajax
 
     expect(page).not_to have_content 'Download (1.5 MB)'
     expect(page).to have_content 'version https://git-lfs.github.com/spec/v1'

spec/features/projects/milestones/milestone_spec.rb

@@ -63,4 +63,28 @@ feature 'Project milestone', :feature do
       expect(page).not_to have_content('Assign some issues to this milestone.')
     end
   end
+
+  context 'when project has an issue' do
+    before do
+      create(:issue, project: project, milestone: milestone)
+
+      visit namespace_project_milestone_path(project.namespace, project, milestone)
+    end
+
+    describe 'the collapsed sidebar' do
+      before do
+        find('.milestone-sidebar .gutter-toggle').click
+      end
+
+      it 'shows the total MR and issue counts' do
+        find('.milestone-sidebar .block', match: :first)
+        blocks = all('.milestone-sidebar .block')
+
+        aggregate_failures 'MR and issue blocks' do
+          expect(blocks[3]).to have_content 1
+          expect(blocks[4]).to have_content 0
+        end
+      end
+    end
+  end
 end

spec/features/security/project/internal_access_spec.rb

@@ -399,6 +399,44 @@ describe "Internal Project Access", feature: true  do
     end
   end
 
+  describe 'GET /:project_path/builds/:id/trace' do
+    let(:pipeline) { create(:ci_pipeline, project: project) }
+    let(:build) { create(:ci_build, pipeline: pipeline) }
+    subject { trace_namespace_project_build_path(project.namespace, project, build.id) }
+
+    context 'when allowed for public and internal' do
+      before do
+        project.update(public_builds: true)
+      end
+
+      it { is_expected.to be_allowed_for(:admin) }
+      it { is_expected.to be_allowed_for(:owner).of(project) }
+      it { is_expected.to be_allowed_for(:master).of(project) }
+      it { is_expected.to be_allowed_for(:developer).of(project) }
+      it { is_expected.to be_allowed_for(:reporter).of(project) }
+      it { is_expected.to be_allowed_for(:guest).of(project) }
+      it { is_expected.to be_allowed_for(:user) }
+      it { is_expected.to be_denied_for(:external) }
+      it { is_expected.to be_denied_for(:visitor) }
+    end
+
+    context 'when disallowed for public and internal' do
+      before do
+        project.update(public_builds: false)
+      end
+
+      it { is_expected.to be_allowed_for(:admin) }
+      it { is_expected.to be_allowed_for(:owner).of(project) }
+      it { is_expected.to be_allowed_for(:master).of(project) }
+      it { is_expected.to be_allowed_for(:developer).of(project) }
+      it { is_expected.to be_allowed_for(:reporter).of(project) }
+      it { is_expected.to be_denied_for(:guest).of(project) }
+      it { is_expected.to be_denied_for(:user) }
+      it { is_expected.to be_denied_for(:external) }
+      it { is_expected.to be_denied_for(:visitor) }
+    end
+  end
+
   describe "GET /:project_path/environments" do
     subject { namespace_project_environments_path(project.namespace, project) }
 

spec/features/security/project/private_access_spec.rb

@@ -388,6 +388,38 @@ describe "Private Project Access", feature: true  do
     end
   end
 
+  describe 'GET /:project_path/builds/:id/trace' do
+    let(:pipeline) { create(:ci_pipeline, project: project) }
+    let(:build) { create(:ci_build, pipeline: pipeline) }
+    subject { trace_namespace_project_build_path(project.namespace, project, build.id) }
+
+    it { is_expected.to be_allowed_for(:admin) }
+    it { is_expected.to be_allowed_for(:owner).of(project) }
+    it { is_expected.to be_allowed_for(:master).of(project) }
+    it { is_expected.to be_allowed_for(:developer).of(project) }
+    it { is_expected.to be_allowed_for(:reporter).of(project) }
+    it { is_expected.to be_denied_for(:guest).of(project) }
+    it { is_expected.to be_denied_for(:user) }
+    it { is_expected.to be_denied_for(:external) }
+    it { is_expected.to be_denied_for(:visitor) }
+
+    context 'when public builds is enabled' do
+      before do
+        project.update(public_builds: true)
+      end
+
+      it { is_expected.to be_allowed_for(:guest).of(project) }
+    end
+
+    context 'when public builds is disabled' do
+      before do
+        project.update(public_builds: false)
+      end
+
+      it { is_expected.to be_denied_for(:guest).of(project) }
+    end
+  end
+
   describe "GET /:project_path/environments" do
     subject { namespace_project_environments_path(project.namespace, project) }
 

spec/features/security/project/public_access_spec.rb

@@ -219,6 +219,44 @@ describe "Public Project Access", feature: true  do
     end
   end
 
+  describe 'GET /:project_path/builds/:id/trace' do
+    let(:pipeline) { create(:ci_pipeline, project: project) }
+    let(:build) { create(:ci_build, pipeline: pipeline) }
+    subject { trace_namespace_project_build_path(project.namespace, project, build.id) }
+
+    context 'when allowed for public' do
+      before do
+        project.update(public_builds: true)
+      end
+
+      it { is_expected.to be_allowed_for(:admin) }
+      it { is_expected.to be_allowed_for(:owner).of(project) }
+      it { is_expected.to be_allowed_for(:master).of(project) }
+      it { is_expected.to be_allowed_for(:developer).of(project) }
+      it { is_expected.to be_allowed_for(:reporter).of(project) }
+      it { is_expected.to be_allowed_for(:guest).of(project) }
+      it { is_expected.to be_allowed_for(:user) }
+      it { is_expected.to be_allowed_for(:external) }
+      it { is_expected.to be_allowed_for(:visitor) }
+    end
+
+    context 'when disallowed for public' do
+      before do
+        project.update(public_builds: false)
+      end
+
+      it { is_expected.to be_allowed_for(:admin) }
+      it { is_expected.to be_allowed_for(:owner).of(project) }
+      it { is_expected.to be_allowed_for(:master).of(project) }
+      it { is_expected.to be_allowed_for(:developer).of(project) }
+      it { is_expected.to be_allowed_for(:reporter).of(project) }
+      it { is_expected.to be_denied_for(:guest).of(project) }
+      it { is_expected.to be_denied_for(:user) }
+      it { is_expected.to be_denied_for(:external) }
+      it { is_expected.to be_denied_for(:visitor) }
+    end
+  end
+
   describe "GET /:project_path/environments" do
     subject { namespace_project_environments_path(project.namespace, project) }
 

spec/helpers/blob_helper_spec.rb

@@ -56,15 +56,14 @@ describe BlobHelper do
     end
   end
 
-  describe "#sanitize_svg" do
+  describe "#sanitize_svg_data" do
     let(:input_svg_path) { File.join(Rails.root, 'spec', 'fixtures', 'unsanitized.svg') }
     let(:data) { open(input_svg_path).read }
     let(:expected_svg_path) { File.join(Rails.root, 'spec', 'fixtures', 'sanitized.svg') }
     let(:expected) { open(expected_svg_path).read }
 
     it 'retains essential elements' do
-      blob = OpenStruct.new(data: data)
-      expect(sanitize_svg(blob).data).to eq(expected)
+      expect(sanitize_svg_data(data)).to eq(expected)
     end
   end
 
@@ -105,4 +104,119 @@ describe BlobHelper do
       expect(Capybara.string(link).find_link('Edit')[:href]).to eq('/gitlab/gitlabhq/edit/master/README.md?mr_id=10')
     end
   end
+
+  context 'viewer related' do
+    include FakeBlobHelpers
+
+    let(:project) { build(:empty_project, lfs_enabled: true) }
+
+    before do
+      allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
+    end
+
+    let(:viewer_class) do
+      Class.new(BlobViewer::Base) do
+        self.max_size = 1.megabyte
+        self.absolute_max_size = 5.megabytes
+        self.type = :rich
+        self.client_side = false
+      end
+    end
+
+    let(:viewer) { viewer_class.new(blob) }
+    let(:blob) { fake_blob }
+
+    describe '#blob_render_error_reason' do
+      context 'for error :too_large' do
+        context 'when the blob size is larger than the absolute max size' do
+          let(:blob) { fake_blob(size: 10.megabytes) }
+
+          it 'returns an error message' do
+            expect(helper.blob_render_error_reason(viewer)).to eq('it is larger than 5 MB')
+          end
+        end
+
+        context 'when the blob size is larger than the max size' do
+          let(:blob) { fake_blob(size: 2.megabytes) }
+
+          it 'returns an error message' do
+            expect(helper.blob_render_error_reason(viewer)).to eq('it is larger than 1 MB')
+          end
+        end
+      end
+
+      context 'for error :server_side_but_stored_in_lfs' do
+        let(:blob) { fake_blob(lfs: true) }
+
+        it 'returns an error message' do
+          expect(helper.blob_render_error_reason(viewer)).to eq('it is stored in LFS')
+        end
+      end
+    end
+
+    describe '#blob_render_error_options' do
+      before do
+        assign(:project, project)
+        assign(:id, File.join('master', blob.path))
+
+        controller.params[:controller] = 'projects/blob'
+        controller.params[:action] = 'show'
+        controller.params[:namespace_id] = project.namespace.to_param
+        controller.params[:project_id] = project.to_param
+        controller.params[:id] = File.join('master', blob.path)
+      end
+
+      context 'for error :too_large' do
+        context 'when the max size can be overridden' do
+          let(:blob) { fake_blob(size: 2.megabytes) }
+
+          it 'includes a "load it anyway" link' do
+            expect(helper.blob_render_error_options(viewer)).to include(/load it anyway/)
+          end
+        end
+
+        context 'when the max size cannot be overridden' do
+          let(:blob) { fake_blob(size: 10.megabytes) }
+
+          it 'does not include a "load it anyway" link' do
+            expect(helper.blob_render_error_options(viewer)).not_to include(/load it anyway/)
+          end
+        end
+      end
+
+      context 'when the viewer is rich' do
+        context 'the blob is rendered as text' do
+          let(:blob) { fake_blob(path: 'file.md', lfs: true) }
+
+          it 'includes a "view the source" link' do
+            expect(helper.blob_render_error_options(viewer)).to include(/view the source/)
+          end
+        end
+
+        context 'the blob is not rendered as text' do
+          let(:blob) { fake_blob(path: 'file.pdf', binary: true, lfs: true) }
+
+          it 'does not include a "view the source" link' do
+            expect(helper.blob_render_error_options(viewer)).not_to include(/view the source/)
+          end
+        end
+      end
+
+      context 'when the viewer is not rich' do
+        before do
+          viewer_class.type = :simple
+        end
+
+        let(:blob) { fake_blob(path: 'file.md', lfs: true) }
+
+        it 'does not include a "view the source" link' do
+          expect(helper.blob_render_error_options(viewer)).not_to include(/view the source/)
+        end
+      end
+
+      it 'includes a "download it" link' do
+        expect(helper.blob_render_error_options(viewer)).to include(/download it/)
+      end
+    end
+  end
 end

spec/javascripts/blob/viewer/index_spec.js

+/* eslint-disable no-new */
+import BlobViewer from '~/blob/viewer/index';
+
+describe('Blob viewer', () => {
+  let blob;
+  preloadFixtures('blob/show.html.raw');
+
+  beforeEach(() => {
+    loadFixtures('blob/show.html.raw');
+    $('#modal-upload-blob').remove();
+
+    blob = new BlobViewer();
+
+    spyOn($, 'ajax').and.callFake(() => {
+      const d = $.Deferred();
+
+      d.resolve({
+        html: '<div>testing</div>',
+      });
+
+      return d.promise();
+    });
+  });
+
+  afterEach(() => {
+    location.hash = '';
+  });
+
+  it('loads source file after switching views', (done) => {
+    document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]').click();
+
+    setTimeout(() => {
+      expect($.ajax).toHaveBeenCalled();
+      expect(
+        document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]')
+          .classList.contains('hidden'),
+      ).toBeFalsy();
+
+      done();
+    });
+  });
+
+  it('loads source file when line number is in hash', (done) => {
+    location.hash = '#L1';
+
+    new BlobViewer();
+
+    setTimeout(() => {
+      expect($.ajax).toHaveBeenCalled();
+      expect(
+        document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]')
+          .classList.contains('hidden'),
+      ).toBeFalsy();
+
+      done();
+    });
+  });
+
+  it('doesnt reload file if already loaded', (done) => {
+    const asyncClick = () => new Promise((resolve) => {
+      document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]').click();
+
+      setTimeout(resolve);
+    });
+
+    asyncClick()
+      .then(() => {
+        expect($.ajax).toHaveBeenCalled();
+        return asyncClick();
+      })
+      .then(() => {
+        expect($.ajax.calls.count()).toBe(1);
+        expect(
+          document.querySelector('.blob-viewer[data-type="simple"]').getAttribute('data-loaded'),
+        ).toBe('true');
+
+        done();
+      })
+      .catch(() => {
+        fail();
+        done();
+      });
+  });
+
+  describe('copy blob button', () => {
+    it('disabled on load', () => {
+      expect(
+        document.querySelector('.js-copy-blob-source-btn').classList.contains('disabled'),
+      ).toBeTruthy();
+    });
+
+    it('has tooltip when disabled', () => {
+      expect(
+        document.querySelector('.js-copy-blob-source-btn').getAttribute('data-original-title'),
+      ).toBe('Switch to the source to copy it to the clipboard');
+    });
+
+    it('enables after switching to simple view', (done) => {
+      document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]').click();
+
+      setTimeout(() => {
+        expect($.ajax).toHaveBeenCalled();
+        expect(
+          document.querySelector('.js-copy-blob-source-btn').classList.contains('disabled'),
+        ).toBeFalsy();
+
+        done();
+      });
+    });
+
+    it('updates tooltip after switching to simple view', (done) => {
+      document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]').click();
+
+      setTimeout(() => {
+        expect($.ajax).toHaveBeenCalled();
+
+        expect(
+          document.querySelector('.js-copy-blob-source-btn').getAttribute('data-original-title'),
+        ).toBe('Copy source to clipboard');
+
+        done();
+      });
+    });
+  });
+
+  describe('switchToViewer', () => {
+    it('removes active class from old viewer button', () => {
+      blob.switchToViewer('simple');
+
+      expect(
+        document.querySelector('.js-blob-viewer-switch-btn.active[data-viewer="rich"]'),
+      ).toBeNull();
+    });
+
+    it('adds active class to new viewer button', () => {
+      const simpleBtn = document.querySelector('.js-blob-viewer-switch-btn[data-viewer="simple"]');
+
+      spyOn(simpleBtn, 'blur');
+
+      blob.switchToViewer('simple');
+
+      expect(
+        simpleBtn.classList.contains('active'),
+      ).toBeTruthy();
+      expect(simpleBtn.blur).toHaveBeenCalled();
+    });
+
+    it('sends AJAX request when switching to simple view', () => {
+      blob.switchToViewer('simple');
+
+      expect($.ajax).toHaveBeenCalled();
+    });
+
+    it('does not send AJAX request when switching to rich view', () => {
+      blob.switchToViewer('simple');
+      blob.switchToViewer('rich');
+
+      expect($.ajax.calls.count()).toBe(1);
+    });
+  });
+});

spec/javascripts/fixtures/blob.rb

+require 'spec_helper'
+
+describe Projects::BlobController, '(JavaScript fixtures)', type: :controller do
+  include JavaScriptFixturesHelpers
+
+  let(:admin) { create(:admin) }
+  let(:namespace) { create(:namespace, name: 'frontend-fixtures' )}
+  let(:project) { create(:project, :repository, namespace: namespace, path: 'branches-project') }
+
+  render_views
+
+  before(:all) do
+    clean_frontend_fixtures('blob/')
+  end
+
+  before(:each) do
+    sign_in(admin)
+  end
+
+  it 'blob/show.html.raw' do |example|
+    get(:show,
+        namespace_id: project.namespace,
+        project_id: project,
+        id: 'add-ipython-files/files/ipython/basic.ipynb')
+
+    expect(response).to be_success
+    store_frontend_fixture(response, example.description)
+  end
+end

spec/lib/gitlab/import_export/project.json

@@ -6980,28 +6980,6 @@
 
   ],
   "services": [
-    {
-      "id": 164,
-      "title": null,
-      "project_id": 5,
-      "created_at": "2016-06-14T15:02:07.372Z",
-      "updated_at": "2016-06-14T15:02:07.372Z",
-      "active": false,
-      "properties": {
-
-      },
-      "template": false,
-      "push_events": true,
-      "issues_events": true,
-      "merge_requests_events": true,
-      "tag_push_events": true,
-      "note_events": true,
-      "build_events": true,
-      "category": "issue_tracker",
-      "type": "CustomIssueTrackerService",
-      "default": true,
-      "wiki_page_events": true
-    },
     {
       "id": 100,
       "title": "JetBrains TeamCity CI",
@@ -7019,6 +6997,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "TeamcityService",
       "category": "ci",
       "default": false,
       "wiki_page_events": true
@@ -7040,6 +7019,7 @@
       "tag_push_events": true,
       "note_events": true,
       "pipeline_events": true,
+      "type": "SlackService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7061,6 +7041,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "RedmineService",
       "category": "issue_tracker",
       "default": false,
       "wiki_page_events": true
@@ -7082,6 +7063,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "PushoverService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7103,6 +7085,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "PivotalTrackerService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7125,6 +7108,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "JiraService",
       "category": "issue_tracker",
       "default": false,
       "wiki_page_events": true
@@ -7146,6 +7130,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "IrkerService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7167,6 +7152,7 @@
       "tag_push_events": true,
       "note_events": true,
       "pipeline_events": true,
+      "type": "HipchatService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7188,6 +7174,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "GemnasiumService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7209,6 +7196,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "FlowdockService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7230,6 +7218,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "ExternalWikiService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7251,6 +7240,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "EmailsOnPushService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7272,6 +7262,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "DroneCiService",
       "category": "ci",
       "default": false,
       "wiki_page_events": true
@@ -7293,6 +7284,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "CustomIssueTrackerService",
       "category": "issue_tracker",
       "default": false,
       "wiki_page_events": true
@@ -7314,6 +7306,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "CampfireService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7335,6 +7328,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "BuildkiteService",
       "category": "ci",
       "default": false,
       "wiki_page_events": true
@@ -7356,6 +7350,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "BambooService",
       "category": "ci",
       "default": false,
       "wiki_page_events": true
@@ -7377,6 +7372,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "AssemblaService",
       "category": "common",
       "default": false,
       "wiki_page_events": true
@@ -7398,6 +7394,7 @@
       "tag_push_events": true,
       "note_events": true,
       "build_events": true,
+      "type": "AssemblaService",
       "category": "common",
       "default": false,
       "wiki_page_events": true

spec/lib/gitlab/import_export/relation_factory_spec.rb

@@ -60,7 +60,7 @@ describe Gitlab::ImportExport::RelationFactory, lib: true do
     end
 
     context 'original service exists' do
-      let(:service_id) { Service.create(project: project).id }
+      let(:service_id) { create(:service, project: project).id }
 
       it 'does not have the original service_id' do
         expect(created_object.service_id).not_to eq(service_id)

spec/models/blob_spec.rb

@@ -2,6 +2,14 @@
 require 'rails_helper'
 
 describe Blob do
+  include FakeBlobHelpers
+
+  let(:project) { build(:empty_project, lfs_enabled: true) }
+
+  before do
+    allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
+  end
+
   describe '.decorate' do
     it 'returns NilClass when given nil' do
       expect(described_class.decorate(nil)).to be_nil
@@ -12,7 +20,7 @@ describe Blob do
     context 'using a binary blob' do
       it 'returns the data as-is' do
         data = "\n\xFF\xB9\xC3"
-        blob = described_class.new(double(binary?: true, data: data))
+        blob = fake_blob(binary: true, data: data)
 
         expect(blob.data).to eq(data)
       end
@@ -20,202 +28,176 @@ describe Blob do
 
     context 'using a text blob' do
       it 'converts the data to UTF-8' do
-        blob = described_class.new(double(binary?: false, data: "\n\xFF\xB9\xC3"))
+        blob = fake_blob(binary: false, data: "\n\xFF\xB9\xC3")
 
         expect(blob.data).to eq("\n���")
       end
     end
   end
 
-  describe '#svg?' do
-    it 'is falsey when not text' do
-      git_blob = double(text?: false)
+  describe '#raw_binary?' do
+    context 'if the blob is a valid LFS pointer' do
+      context 'if the extension has a rich viewer' do
+        context 'if the viewer is binary' do
+          it 'returns true' do
+            blob = fake_blob(path: 'file.pdf', lfs: true)
 
-      expect(described_class.decorate(git_blob)).not_to be_svg
+            expect(blob.raw_binary?).to be_truthy
           end
-
-    it 'is falsey when no language is detected' do
-      git_blob = double(text?: true, language: nil)
-
-      expect(described_class.decorate(git_blob)).not_to be_svg
         end
 
-    it' is falsey when language is not SVG' do
-      git_blob = double(text?: true, language: double(name: 'XML'))
+        context 'if the viewer is text-based' do
+          it 'return false' do
+            blob = fake_blob(path: 'file.md', lfs: true)
 
-      expect(described_class.decorate(git_blob)).not_to be_svg
+            expect(blob.raw_binary?).to be_falsey
           end
-
-    it 'is truthy when language is SVG' do
-      git_blob = double(text?: true, language: double(name: 'SVG'))
-
-      expect(described_class.decorate(git_blob)).to be_svg
         end
       end
 
-  describe '#pdf?' do
-    it 'is falsey when file extension is not .pdf' do
-      git_blob = Gitlab::Git::Blob.new(name: 'git_blob.txt')
+      context "if the extension doesn't have a rich viewer" do
+        it 'returns true' do
+          blob = fake_blob(path: 'file.exe', lfs: true)
 
-      expect(described_class.decorate(git_blob)).not_to be_pdf
+          expect(blob.raw_binary?).to be_truthy
         end
-
-    it 'is truthy when file extension is .pdf' do
-      git_blob = Gitlab::Git::Blob.new(name: 'git_blob.pdf')
-
-      expect(described_class.decorate(git_blob)).to be_pdf
       end
     end
 
-  describe '#ipython_notebook?' do
-    it 'is falsey when language is not Jupyter Notebook' do
-      git_blob = double(text?: true, language: double(name: 'JSON'))
+    context 'if the blob is not an LFS pointer' do
+      context 'if the blob is binary' do
+        it 'returns true' do
+          blob = fake_blob(path: 'file.pdf', binary: true)
 
-      expect(described_class.decorate(git_blob)).not_to be_ipython_notebook
+          expect(blob.raw_binary?).to be_truthy
+        end
       end
 
-    it 'is truthy when language is Jupyter Notebook' do
-      git_blob = double(text?: true, language: double(name: 'Jupyter Notebook'))
+      context 'if the blob is text-based' do
+        it 'return false' do
+          blob = fake_blob(path: 'file.md')
 
-      expect(described_class.decorate(git_blob)).to be_ipython_notebook
+          expect(blob.raw_binary?).to be_falsey
+        end
+      end
     end
   end
 
-  describe '#sketch?' do
-    it 'is falsey with image extension' do
-      git_blob = Gitlab::Git::Blob.new(name: "design.png")
+  describe '#extension' do
+    it 'returns the extension' do
+      blob = fake_blob(path: 'file.md')
 
-      expect(described_class.decorate(git_blob)).not_to be_sketch
+      expect(blob.extension).to eq('md')
+    end
   end
 
-    it 'is truthy with sketch extension' do
-      git_blob = Gitlab::Git::Blob.new(name: "design.sketch")
+  describe '#simple_viewer' do
+    context 'when the blob is empty' do
+      it 'returns an empty viewer' do
+        blob = fake_blob(data: '')
 
-      expect(described_class.decorate(git_blob)).to be_sketch
+        expect(blob.simple_viewer).to be_a(BlobViewer::Empty)
       end
     end
 
-  describe '#video?' do
-    it 'is falsey with image extension' do
-      git_blob = Gitlab::Git::Blob.new(name: 'image.png')
+    context 'when the file represented by the blob is binary' do
+      it 'returns a download viewer' do
+        blob = fake_blob(binary: true)
 
-      expect(described_class.decorate(git_blob)).not_to be_video
+        expect(blob.simple_viewer).to be_a(BlobViewer::Download)
+      end
     end
 
-    UploaderHelper::VIDEO_EXT.each do |ext|
-      it "is truthy when extension is .#{ext}" do
-        git_blob = Gitlab::Git::Blob.new(name: "video.#{ext}")
+    context 'when the file represented by the blob is text-based' do
+      it 'returns a text viewer' do
+        blob = fake_blob
 
-        expect(described_class.decorate(git_blob)).to be_video
+        expect(blob.simple_viewer).to be_a(BlobViewer::Text)
       end
     end
   end
 
-  describe '#stl?' do
-    it 'is falsey with image extension' do
-      git_blob = Gitlab::Git::Blob.new(name: 'file.png')
-
-      expect(described_class.decorate(git_blob)).not_to be_stl
+  describe '#rich_viewer' do
+    context 'when the blob is an invalid LFS pointer' do
+      before do
+        project.lfs_enabled = false
       end
 
-    it 'is truthy with STL extension' do
-      git_blob = Gitlab::Git::Blob.new(name: 'file.stl')
+      it 'returns nil' do
+        blob = fake_blob(path: 'file.pdf', lfs: true)
 
-      expect(described_class.decorate(git_blob)).to be_stl
+        expect(blob.rich_viewer).to be_nil
       end
     end
 
-  describe '#to_partial_path' do
-    let(:project) { double(lfs_enabled?: true) }
+    context 'when the blob is empty' do
+      it 'returns nil' do
+        blob = fake_blob(data: '')
 
-    def stubbed_blob(overrides = {})
-      overrides.reverse_merge!(
-        name: nil,
-        image?: false,
-        language: nil,
-        lfs_pointer?: false,
-        svg?: false,
-        text?: false,
-        binary?: false,
-        stl?: false
-      )
-
-      described_class.decorate(Gitlab::Git::Blob.new({})).tap do |blob|
-        allow(blob).to receive_messages(overrides)
+        expect(blob.rich_viewer).to be_nil
       end
     end
 
-    it 'handles LFS pointers with LFS enabled' do
-      blob = stubbed_blob(lfs_pointer?: true, text?: true)
-      expect(blob.to_partial_path(project)).to eq 'download'
-    end
+    context 'when the blob is a valid LFS pointer' do
+      it 'returns a matching viewer' do
+        blob = fake_blob(path: 'file.pdf', lfs: true)
 
-    it 'handles LFS pointers with LFS disabled' do
-      blob = stubbed_blob(lfs_pointer?: true, text?: true)
-      project = double(lfs_enabled?: false)
-      expect(blob.to_partial_path(project)).to eq 'text'
+        expect(blob.rich_viewer).to be_a(BlobViewer::PDF)
       end
-
-    it 'handles SVGs' do
-      blob = stubbed_blob(text?: true, svg?: true)
-      expect(blob.to_partial_path(project)).to eq 'svg'
     end
 
-    it 'handles images' do
-      blob = stubbed_blob(image?: true)
-      expect(blob.to_partial_path(project)).to eq 'image'
-    end
+    context 'when the blob is binary' do
+      it 'returns a matching binary viewer' do
+        blob = fake_blob(path: 'file.pdf', binary: true)
 
-    it 'handles text' do
-      blob = stubbed_blob(text?: true, name: 'test.txt')
-      expect(blob.to_partial_path(project)).to eq 'text'
+        expect(blob.rich_viewer).to be_a(BlobViewer::PDF)
       end
-
-    it 'defaults to download' do
-      blob = stubbed_blob
-      expect(blob.to_partial_path(project)).to eq 'download'
     end
 
-    it 'handles PDFs' do
-      blob = stubbed_blob(name: 'blob.pdf', pdf?: true)
-      expect(blob.to_partial_path(project)).to eq 'pdf'
-    end
+    context 'when the blob is text-based' do
+      it 'returns a matching text-based viewer' do
+        blob = fake_blob(path: 'file.md')
 
-    it 'handles iPython notebooks' do
-      blob = stubbed_blob(text?: true, ipython_notebook?: true)
-      expect(blob.to_partial_path(project)).to eq 'notebook'
+        expect(blob.rich_viewer).to be_a(BlobViewer::Markup)
+      end
     end
-
-    it 'handles Sketch files' do
-      blob = stubbed_blob(text?: true, sketch?: true, binary?: true)
-      expect(blob.to_partial_path(project)).to eq 'sketch'
   end
 
-    it 'handles STLs' do
-      blob = stubbed_blob(text?: true, stl?: true)
-      expect(blob.to_partial_path(project)).to eq 'stl'
+  describe '#rendered_as_text?' do
+    context 'when ignoring errors' do
+      context 'when the simple viewer is text-based' do
+        it 'returns true' do
+          blob = fake_blob(path: 'file.md', size: 100.megabytes)
+
+          expect(blob.rendered_as_text?).to be_truthy
         end
       end
 
-  describe '#size_within_svg_limits?' do
-    let(:blob) { described_class.decorate(double(:blob)) }
-
-    it 'returns true when the blob size is smaller than the SVG limit' do
-      expect(blob).to receive(:size).and_return(42)
+      context 'when the simple viewer is binary' do
+        it 'returns false' do
+          blob = fake_blob(path: 'file.pdf', binary: true, size: 100.megabytes)
 
-      expect(blob.size_within_svg_limits?).to eq(true)
+          expect(blob.rendered_as_text?).to be_falsey
+        end
+      end
     end
 
-    it 'returns true when the blob size is equal to the SVG limit' do
-      expect(blob).to receive(:size).and_return(Blob::MAXIMUM_SVG_SIZE)
+    context 'when not ignoring errors' do
+      context 'when the viewer has render errors' do
+        it 'returns false' do
+          blob = fake_blob(path: 'file.md', size: 100.megabytes)
 
-      expect(blob.size_within_svg_limits?).to eq(true)
+          expect(blob.rendered_as_text?(ignore_errors: false)).to be_falsey
+        end
       end
 
-    it 'returns false when the blob size is larger than the SVG limit' do
-      expect(blob).to receive(:size).and_return(1.terabyte)
+      context "when the viewer doesn't have render errors" do
+        it 'returns true' do
+          blob = fake_blob(path: 'file.md')
 
-      expect(blob.size_within_svg_limits?).to eq(false)
+          expect(blob.rendered_as_text?(ignore_errors: false)).to be_truthy
+        end
+      end
     end
   end
 end

spec/models/blob_viewer/base_spec.rb

+require 'spec_helper'
+
+describe BlobViewer::Base, model: true do
+  include FakeBlobHelpers
+
+  let(:project) { build(:empty_project) }
+
+  let(:viewer_class) do
+    Class.new(described_class) do
+      self.extensions = %w(pdf)
+      self.max_size = 1.megabyte
+      self.absolute_max_size = 5.megabytes
+      self.client_side = false
+    end
+  end
+
+  let(:viewer) { viewer_class.new(blob) }
+
+  describe '.can_render?' do
+    context 'when the extension is supported' do
+      let(:blob) { fake_blob(path: 'file.pdf') }
+
+      it 'returns true' do
+        expect(viewer_class.can_render?(blob)).to be_truthy
+      end
+    end
+
+    context 'when the extension is not supported' do
+      let(:blob) { fake_blob(path: 'file.txt') }
+
+      it 'returns false' do
+        expect(viewer_class.can_render?(blob)).to be_falsey
+      end
+    end
+  end
+
+  describe '#too_large?' do
+    context 'when the blob size is larger than the max size' do
+      let(:blob) { fake_blob(path: 'file.pdf', size: 2.megabytes) }
+
+      it 'returns true' do
+        expect(viewer.too_large?).to be_truthy
+      end
+    end
+
+    context 'when the blob size is smaller than the max size' do
+      let(:blob) { fake_blob(path: 'file.pdf', size: 10.kilobytes) }
+
+      it 'returns false' do
+        expect(viewer.too_large?).to be_falsey
+      end
+    end
+  end
+
+  describe '#absolutely_too_large?' do
+    context 'when the blob size is larger than the absolute max size' do
+      let(:blob) { fake_blob(path: 'file.pdf', size: 10.megabytes) }
+
+      it 'returns true' do
+        expect(viewer.absolutely_too_large?).to be_truthy
+      end
+    end
+
+    context 'when the blob size is smaller than the absolute max size' do
+      let(:blob) { fake_blob(path: 'file.pdf', size: 2.megabytes) }
+
+      it 'returns false' do
+        expect(viewer.absolutely_too_large?).to be_falsey
+      end
+    end
+  end
+
+  describe '#can_override_max_size?' do
+    context 'when the blob size is larger than the max size' do
+      context 'when the blob size is larger than the absolute max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 10.megabytes) }
+
+        it 'returns false' do
+          expect(viewer.can_override_max_size?).to be_falsey
+        end
+      end
+
+      context 'when the blob size is smaller than the absolute max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 2.megabytes) }
+
+        it 'returns true' do
+          expect(viewer.can_override_max_size?).to be_truthy
+        end
+      end
+    end
+
+    context 'when the blob size is smaller than the max size' do
+      let(:blob) { fake_blob(path: 'file.pdf', size: 10.kilobytes) }
+
+      it 'returns false' do
+        expect(viewer.can_override_max_size?).to be_falsey
+      end
+    end
+  end
+
+  describe '#render_error' do
+    context 'when the max size is overridden' do
+      before do
+        viewer.override_max_size = true
+      end
+
+      context 'when the blob size is larger than the absolute max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 10.megabytes) }
+
+        it 'returns :too_large' do
+          expect(viewer.render_error).to eq(:too_large)
+        end
+      end
+
+      context 'when the blob size is smaller than the absolute max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 2.megabytes) }
+
+        it 'returns nil' do
+          expect(viewer.render_error).to be_nil
+        end
+      end
+    end
+
+    context 'when the max size is not overridden' do
+      context 'when the blob size is larger than the max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 2.megabytes) }
+
+        it 'returns :too_large' do
+          expect(viewer.render_error).to eq(:too_large)
+        end
+      end
+
+      context 'when the blob size is smaller than the max size' do
+        let(:blob) { fake_blob(path: 'file.pdf', size: 10.kilobytes) }
+
+        it 'returns nil' do
+          expect(viewer.render_error).to be_nil
+        end
+      end
+    end
+
+    context 'when the viewer is server side but the blob is stored in LFS' do
+      let(:project) { build(:empty_project, lfs_enabled: true) }
+
+      let(:blob) { fake_blob(path: 'file.pdf', lfs: true) }
+
+      before do
+        allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
+      end
+
+      it 'return :server_side_but_stored_in_lfs' do
+        expect(viewer.render_error).to eq(:server_side_but_stored_in_lfs)
+      end
+    end
+  end
+
+  describe '#prepare!' do
+    context 'when the viewer is server side' do
+      let(:blob) { fake_blob(path: 'file.md') }
+
+      before do
+        viewer_class.client_side = false
+      end
+
+      it 'loads all blob data' do
+        expect(blob).to receive(:load_all_data!)
+
+        viewer.prepare!
+      end
+    end
+
+    context 'when the viewer is client side' do
+      let(:blob) { fake_blob(path: 'file.md') }
+
+      before do
+        viewer_class.client_side = true
+      end
+
+      it "doesn't load all blob data" do
+        expect(blob).not_to receive(:load_all_data!)
+
+        viewer.prepare!
+      end
+    end
+  end
+end

spec/models/project_services/chat_notification_service_spec.rb

@@ -11,10 +11,10 @@ describe ChatNotificationService, models: true do
 
   describe '#can_test?' do
     context 'with empty repository' do
-      it 'returns false' do
+      it 'returns true' do
         subject.project = create(:empty_project, :empty_repo)
 
-        expect(subject.can_test?).to be false
+        expect(subject.can_test?).to be true
       end
     end
 

spec/models/project_services/issue_tracker_service_spec.rb

@@ -8,7 +8,7 @@ describe IssueTrackerService, models: true do
       let(:service) { RedmineService.new(project: project, active: true) }
 
       before do
-        create(:service, project: project, active: true, category: 'issue_tracker')  
+        create(:custom_issue_tracker_service, project: project)
       end
 
       context 'when service is changed manually by user' do

spec/models/service_spec.rb

@@ -6,44 +6,53 @@ describe Service, models: true do
     it { is_expected.to have_one :service_hook }
   end
 
-  describe "Test Button" do
-    before do
-      @service = Service.new
+  describe 'Validations' do
+    it { is_expected.to validate_presence_of(:type) }
   end
 
-    describe "Testable" do
+  describe "Test Button" do
+    describe '#can_test?' do
+      let(:service) { create(:service, project: project) }
+
+      context 'when repository is not empty' do
         let(:project) { create(:project, :repository) }
 
-      before do
-        allow(@service).to receive(:project).and_return(project)
-        @testable = @service.can_test?
+        it 'returns true' do
+          expect(service.can_test?).to be true
+        end
       end
 
-      describe '#can_test?' do
-        it { expect(@testable).to eq(true) }
+      context 'when repository is empty' do
+        let(:project) { create(:empty_project) }
+
+        it 'returns true' do
+          expect(service.can_test?).to be true
+        end
+      end
     end
 
     describe '#test' do
       let(:data) { 'test' }
+      let(:service) { create(:service, project: project) }
+
+      context 'when repository is not empty' do
+        let(:project) { create(:project, :repository) }
 
         it 'test runs execute' do
-          expect(@service).to receive(:execute).with(data)
+          expect(service).to receive(:execute).with(data)
 
-          @service.test(data)
-        end
+          service.test(data)
         end
       end
 
-    describe "With commits" do
-      let(:project) { create(:project, :repository) }
+      context 'when repository is empty' do
+        let(:project) { create(:empty_project) }
 
-      before do
-        allow(@service).to receive(:project).and_return(project)
-        @testable = @service.can_test?
-      end
+        it 'test runs execute' do
+          expect(service).to receive(:execute).with(data)
 
-      describe '#can_test?' do
-        it { expect(@testable).to eq(true) }
+          service.test(data)
+        end
       end
     end
   end

spec/models/user_spec.rb

@@ -1556,6 +1556,16 @@ describe User, models: true do
         expect(ghost.email).to eq('ghost1@example.com')
       end
     end
+
+    context 'when a domain whitelist is in place' do
+      before do
+        stub_application_setting(domain_whitelist: ['gitlab.com'])
+      end
+
+      it 'creates a ghost user' do
+        expect(User.ghost).to be_persisted
+      end
+    end
   end
 
   describe '#update_two_factor_requirement' do

spec/requests/api/v3/deployments_spec.rb

 require 'spec_helper'
 
-describe API::Deployments do
+describe API::V3::Deployments do
   let(:user)        { create(:user) }
   let(:non_member)  { create(:user) }
   let(:project)     { deployment.environment.project }
@@ -24,11 +24,11 @@ describe API::Deployments do
   describe 'GET /projects/:id/deployments' do
     context 'as member of the project' do
       it_behaves_like 'a paginated resources' do
-        let(:request) { get api("/projects/#{project.id}/deployments", user) }
+        let(:request) { get v3_api("/projects/#{project.id}/deployments", user) }
       end
 
       it 'returns projects deployments' do
-        get api("/projects/#{project.id}/deployments", user)
+        get v3_api("/projects/#{project.id}/deployments", user)
 
         expect(response).to have_http_status(200)
         expect(json_response).to be_an Array
@@ -40,7 +40,7 @@ describe API::Deployments do
 
     context 'as non member' do
       it 'returns a 404 status code' do
-        get api("/projects/#{project.id}/deployments", non_member)
+        get v3_api("/projects/#{project.id}/deployments", non_member)
 
         expect(response).to have_http_status(404)
       end
@@ -50,7 +50,7 @@ describe API::Deployments do
   describe 'GET /projects/:id/deployments/:deployment_id' do
     context 'as a member of the project' do
       it 'returns the projects deployment' do
-        get api("/projects/#{project.id}/deployments/#{deployment.id}", user)
+        get v3_api("/projects/#{project.id}/deployments/#{deployment.id}", user)
 
         expect(response).to have_http_status(200)
         expect(json_response['sha']).to match /\A\h{40}\z/
@@ -60,7 +60,7 @@ describe API::Deployments do
 
     context 'as non member' do
       it 'returns a 404 status code' do
-        get api("/projects/#{project.id}/deployments/#{deployment.id}", non_member)
+        get v3_api("/projects/#{project.id}/deployments/#{deployment.id}", non_member)
 
         expect(response).to have_http_status(404)
       end

spec/support/helpers/fake_blob_helpers.rb

+module FakeBlobHelpers
+  class FakeBlob
+    include Linguist::BlobHelper
+
+    attr_reader :path, :size, :data, :lfs_oid, :lfs_size
+
+    def initialize(path: 'file.txt', size: 1.kilobyte, data: 'foo', binary: false, lfs: nil)
+      @path = path
+      @size = size
+      @data = data
+      @binary = binary
+
+      @lfs_pointer = lfs.present?
+      if @lfs_pointer
+        @lfs_oid = SecureRandom.hex(20)
+        @lfs_size = 1.megabyte
+      end
+    end
+
+    alias_method :name, :path
+
+    def mode
+      nil
+    end
+
+    def id
+      0
+    end
+
+    def binary?
+      @binary
+    end
+
+    def load_all_data!(repository)
+      # No-op
+    end
+
+    def lfs_pointer?
+      @lfs_pointer
+    end
+
+    def truncated?
+      false
+    end
+  end
+
+  def fake_blob(**kwargs)
+    Blob.decorate(FakeBlob.new(**kwargs), project)
+  end
+end

spec/support/matchers/access_matchers.rb

@@ -51,7 +51,7 @@ module AccessMatchers
       emulate_user(user, @membership)
       visit(url)
 
-      status_code != 404 && current_path != new_user_session_path
+      status_code == 200 && current_path != new_user_session_path
     end
 
     chain :of do |membership|
@@ -66,7 +66,7 @@ module AccessMatchers
       emulate_user(user, @membership)
       visit(url)
 
-      status_code == 404 || current_path == new_user_session_path
+      [401, 404].include?(status_code) || current_path == new_user_session_path
     end
 
     chain :of do |membership|

spec/views/projects/blob/_viewer.html.haml_spec.rb

+require 'spec_helper'
+
+describe 'projects/blob/_viewer.html.haml', :view do
+  include FakeBlobHelpers
+
+  let(:project) { build(:empty_project) }
+
+  let(:viewer_class) do
+    Class.new(BlobViewer::Base) do
+      include BlobViewer::Rich
+
+      self.partial_name = 'text'
+      self.max_size = 1.megabyte
+      self.absolute_max_size = 5.megabytes
+      self.client_side = false
+    end
+  end
+
+  let(:viewer) { viewer_class.new(blob) }
+  let(:blob) { fake_blob }
+
+  before do
+    assign(:project, project)
+    assign(:id, File.join('master', blob.path))
+
+    controller.params[:controller] = 'projects/blob'
+    controller.params[:action] = 'show'
+    controller.params[:namespace_id] = project.namespace.to_param
+    controller.params[:project_id] = project.to_param
+    controller.params[:id] = File.join('master', blob.path)
+  end
+
+  def render_view
+    render partial: 'projects/blob/viewer', locals: { viewer: viewer }
+  end
+
+  context 'when the viewer is server side' do
+    before do
+      viewer_class.client_side = false
+    end
+
+    context 'when there is no render error' do
+      it 'adds a URL to the blob viewer element' do
+        render_view
+
+        expect(rendered).to have_css('.blob-viewer[data-url]')
+      end
+
+      it 'displays a spinner' do
+        render_view
+
+        expect(rendered).to have_css('i[aria-label="Loading content"]')
+      end
+    end
+
+    context 'when there is a render error' do
+      let(:blob) { fake_blob(size: 10.megabytes) }
+
+      it 'renders the error' do
+        render_view
+
+        expect(view).to render_template('projects/blob/_render_error')
+      end
+    end
+  end
+
+  context 'when the viewer is client side' do
+    before do
+      viewer_class.client_side = true
+    end
+
+    context 'when there is no render error' do
+      it 'prepares the viewer' do
+        expect(viewer).to receive(:prepare!)
+
+        render_view
+      end
+
+      it 'renders the viewer' do
+        render_view
+
+        expect(view).to render_template('projects/blob/viewers/_text')
+      end
+    end
+
+    context 'when there is a render error' do
+      let(:blob) { fake_blob(size: 10.megabytes) }
+
+      it 'renders the error' do
+        render_view
+
+        expect(view).to render_template('projects/blob/_render_error')
+      end
+    end
+  end
+end