Merge pull request #3240 from DanKnox/fix_wiki_migrator

Fix Wiki migration task and add more test coverage.

lib/tasks/gitlab/migrate_wiki.rake

@@ -16,5 +16,27 @@ namespace :gitlab do
       wiki_migrator = WikiToGollumMigrator.new
       wiki_migrator.migrate!
     end
+
+    # This task will destroy all of the Wiki repos
+    # that the Wiki migration task created. Run this
+    # to clean up your environment if you experienced
+    # problems during the original migration. After
+    # executing this task, you can attempt the original
+    # migration again.
+    #
+    # Notes:
+    #  * This will not affect Wikis that have been created
+    #    as Gollum Wikis only. It will only remove the wikis
+    #    for the repositories that have old Wiki data in the
+    #    dataabase.
+    #  * If you have any repositories already named
+    #    namespace/project.wiki that you do not wish
+    #    to be removed you may want to perform a manual
+    #    cleanup instead.
+    desc "GITLAB | Remove the Wiki repositories created by the `gitlab:wiki:migrate` task."
+    task :rollback => :environment do
+      wiki_migrator = WikiToGollumMigrator.new
+      wiki_migrator.rollback!
+    end
   end
 end

lib/wiki_to_gollum_migrator.rb

@@ -19,12 +19,30 @@ class WikiToGollumMigrator
     end
   end
 
+  def rollback!
+    log "\nBeginning Wiki Migration Rollback..."
+    projects.each do |project|
+      destroy_gollum_repo project
+    end
+    log "\nWiki Rollback Complete."
+  end
+
   private
 
   def create_gollum_repo(project)
     GollumWiki.new(project, nil).wiki
   end
 
+  def destroy_gollum_repo(project)
+    log "  Removing Wiki repo for project: #{project.path_with_namespace}"
+    path = GollumWiki.new(project, nil).path_with_namespace
+    if Gitlab::Shell.new.remove_repository(path)
+      log "  Wiki destroyed successfully. " + "[OK}".green
+    else
+      log "  Problem destroying wiki. Please remove it manually. " + "[FAILED]".red
+    end
+  end
+
   def create_pages(project, wiki)
     pages = project.wikis.group(:slug).all
 
@@ -45,8 +63,9 @@ class WikiToGollumMigrator
     wiki = GollumWiki.new(project, page.user)
     wiki_page = WikiPage.new(wiki)
 
-    attributes = extract_attributes_from_page(first_rev)
+    attributes = extract_attributes_from_page(first_rev, project)
 
+    log "  Creating page '#{first_rev.title}'..."
     if wiki_page.create(attributes)
       log "  Created page '#{wiki_page.title}' " + "[OK]".green
 
@@ -59,15 +78,15 @@ class WikiToGollumMigrator
   end
 
   def create_revisions(project, page, revisions)
+    log "    Creating revisions..."
     revisions.each do |revision|
-      log "    Creating revisions..."
       # Reinitialize a new GollumWiki instance for each page
       # and revision created so the correct User is shown in
       # the commit message.
       wiki = GollumWiki.new(project, revision.user)
       wiki_page = wiki.find_page(page.slug)
 
-      attributes = extract_attributes_from_page(revision)
+      attributes = extract_attributes_from_page(revision, project)
 
       content = attributes[:content]
 
@@ -79,13 +98,15 @@ class WikiToGollumMigrator
     end
   end
 
-  def extract_attributes_from_page(page)
+  def extract_attributes_from_page(page, project)
     attributes = page.attributes
                      .with_indifferent_access
                      .slice(:title, :content)
 
+    slug = page.slug
+
     # Change 'index' pages to 'home' pages to match Gollum standards
-    if attributes[:title].downcase == "index"
+    if slug.downcase == "index"
       attributes[:title] = "home" unless home_already_exists?(project)
     end
 
@@ -93,7 +114,7 @@ class WikiToGollumMigrator
   end
 
   def home_already_exists?(project)
-    project.wikis.where(title: 'home').any? || project.wikis.where(title: 'Home').any?
+    project.wikis.where(slug: 'home').any? || project.wikis.where(slug: 'Home').any?
   end
 
   def log(message)

spec/lib/wiki_to_gollum_migrator_spec.rb

@@ -108,6 +108,111 @@ describe WikiToGollumMigrator do
         end
       end
     end
+
+    context "wikis with pages that have titles that do not match the slugs" do
+      before do
+        project = @projects.last
+        @page = project.wikis.new(title: "test page", content: "Invalid Page")
+        @page.slug = "totally-incorrect-slug"
+        @page.user = project.owner
+        @page.save!
+
+        create_revision(@page)
+
+        subject.rollback!
+        subject.migrate!
+      end
+
+      it "has a page with a title differing the slug" do
+        @page.slug.should_not == @page.title.parameterize
+      end
+
+      it "creates a new revision for each old revision of the page" do
+        @projects.each do |project|
+          wiki = GollumWiki.new(project, nil)
+          wiki.pages.each do |page|
+            page.versions.count.should == 2
+          end
+        end
+      end
+    end
+
+    context "changing wiki title from index to home" do
+      before do
+        @project = @projects.last
+        @page = @project.wikis.new(title: "Index", content: "Home Page")
+        @page.slug = "index"
+        @page.user = @project.owner
+        @page.save!
+
+        create_revision(@page)
+
+        subject.rollback!
+      end
+
+      it "creates a page called Home" do
+        subject.migrate!
+        wiki = GollumWiki.new(@project, nil)
+        page = wiki.find_page("home")
+        page.should be_present
+      end
+
+      context "when a page called Home already exists" do
+        before do
+        @index_page = @project.wikis.new(title: "Index", content: "Index Page")
+        @index_page.slug = "index"
+        @index_page.user = @project.owner
+        @index_page.save!
+
+        create_revision(@index_page)
+
+        @home_page = @project.wikis.new(title: "Home", content: "Home Page")
+        @home_page.slug = "home"
+        @home_page.user = @project.owner
+        @home_page.save!
+
+        create_revision(@home_page)
+        subject.migrate!
+        end
+
+        it "creates the index page" do
+          wiki = GollumWiki.new(@project, nil)
+          page = wiki.find_page("index")
+          page.should be_present
+        end
+
+        it "creates the home page" do
+          wiki = GollumWiki.new(@project, nil)
+          page = wiki.find_page("home")
+          page.should be_present
+        end
+      end
+    end
+  end
+
+  context "#rollback!" do
+    before do
+      Gitlab::Shell.any_instance.stub(:add_repository) do |path|
+        create_temp_repo("#{@repo_path}/#{path}.git")
+      end
+
+      Gitlab::Shell.any_instance.stub(:remove_repository) do |path|
+        FileUtils.rm_rf "#{@repo_path}/#{path}.git"
+      end
+
+      subject.stub(:log).as_null_object
+
+      subject.migrate!
+      subject.rollback!
+    end
+
+    it "destroys all of the wiki repositories that were created during migrate!" do
+      @projects.each do |project|
+        wiki_path = project.path_with_namespace + ".wiki.git"
+        full_path = @repo_path + "/" + wiki_path
+        File.exist?(full_path).should be_false
+      end
+    end
   end