Create a push rule to check branch name

app/controllers/projects/push_rules_controller.rb

@@ -25,6 +25,6 @@ class Projects::PushRulesController < Projects::ApplicationController
   # Only allow a trusted parameter "white list" through.
   def push_rule_params
     params.require(:push_rule).permit(:deny_delete_tag, :delete_branch_regex,
-      :commit_message_regex, :force_push_regex, :author_email_regex, :member_check, :file_name_regex, :max_file_size, :prevent_secrets)
+      :commit_message_regex, :branch_name_regex, :force_push_regex, :author_email_regex, :member_check, :file_name_regex, :max_file_size, :prevent_secrets)
   end
 end

app/models/push_rule.rb

@@ -8,6 +8,7 @@ class PushRule < ActiveRecord::Base
 
   def commit_validation?
     commit_message_regex.present? ||
+      branch_name_regex.present? ||
       author_email_regex.present? ||
       member_check ||
       file_name_regex.present? ||
@@ -19,6 +20,10 @@ class PushRule < ActiveRecord::Base
     data_match?(message, commit_message_regex)
   end
 
+  def branch_name_allowed?(branch)
+    data_match?(branch, branch_name_regex)
+  end
+
   def author_email_allowed?(email)
     data_match?(email, author_email_regex)
   end

app/views/shared/_push_rules_form.html.haml

@@ -35,6 +35,15 @@
     If this field is empty it allows any commit message.
     For example you can require that an issue number is always mentioned in the commit message.
 
+.form-group
+  = f.label :branch_name_regex, "Branch name", class: 'label-light'
+  = f.text_field :branch_name_regex, class: "form-control", placeholder: 'Example: (feature|hotfix)\/*'
+  .help-block
+    All branch names must match this
+    = link_to 'Ruby regular expression', 'http://www.ruby-doc.org/core-2.1.1/Regexp.html'
+    to be pushed.
+    If this field is empty it allows any branch name.
+
 .form-group
   = f.label :author_email_regex, "Commit author's email", class: 'label-light'
   = f.text_field :author_email_regex, class: "form-control", placeholder: 'Example: @my-company.com$'

changelogs/unreleased-ee/feature-2293-branch-name-push-rule.yml

+---
+title: Create a push rule to check the branch name
+merge_request: 1896
+author: Riccardo Padovani

db/migrate/20170513005817_add_push_rule_branch_name.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddPushRuleBranchName < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  def up
+    add_column :push_rules, :branch_name_regex, :string
+  end
+
+  def down
+    remove_column :push_rules, :branch_name_regex
+  end
+end

db/schema.rb

@@ -1228,6 +1228,7 @@ ActiveRecord::Schema.define(version: 20170523091700) do
     t.string "force_push_regex"
     t.string "delete_branch_regex"
     t.string "commit_message_regex"
+    t.string "branch_name_regex"
     t.boolean "deny_delete_tag"
     t.integer "project_id"
     t.datetime "created_at"

doc/api/projects.md

@@ -1263,6 +1263,7 @@ Parameters:
   "id": 1,
   "project_id": 3,
   "commit_message_regex": "Fixes \d +\",
+  "branch_name_regex": "",
   "deny_delete_tag": false,
   "created_at": "2012-10-12T17:04:47Z",
   "member_check": false,
@@ -1290,6 +1291,7 @@ Parameters:
 | `member_check` | boolean | no | Restrict commits by author (email) to existing GitLab users |
 | `prevent_secrets` | boolean | no | GitLab will reject any files that are likely to contain secrets |
 | `commit_message_regex` | string | no | All commit messages must match this, e.g. `Fixed \d+\..*` |
+| `branch_name_regex` | string | no | All branch names must match this, e.g. `(feature|hotfix)\/*` |
 | `author_email_regex` | string | no | All commit author emails must match this, e.g. `@my-company.com$` |
 | `file_name_regex` | string | no | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
 | `max_file_size` | integer | no | Maximum file size (MB) |
@@ -1311,6 +1313,7 @@ Parameters:
 | `member_check` | boolean | no | Restrict commits by author (email) to existing GitLab users |
 | `prevent_secrets` | boolean | no | GitLab will reject any files that are likely to contain secrets |
 | `commit_message_regex` | string | no | All commit messages must match this, e.g. `Fixed \d+\..*` |
+| `branch_name_regex` | string | no | All branch names must match this, e.g. `(feature|hotfix)\/*` |
 | `author_email_regex` | string | no | All commit author emails must match this, e.g. `@my-company.com$` |
 | `file_name_regex` | string | no | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
 | `max_file_size` | integer | no | Maximum file size (MB) |

lib/api/entities.rb

@@ -65,7 +65,7 @@ module API
 
     class ProjectPushRule < Grape::Entity
       expose :id, :project_id, :created_at
-      expose :commit_message_regex, :deny_delete_tag
+      expose :commit_message_regex, :branch_name_regex, :deny_delete_tag
       expose :member_check, :prevent_secrets, :author_email_regex
       expose :file_name_regex, :max_file_size
     end

lib/api/project_push_rule.rb

@@ -13,11 +13,12 @@ module API
           optional :member_check, type: Boolean, desc: 'Restrict commits by author (email) to existing GitLab users'
           optional :prevent_secrets, type: Boolean, desc: 'GitLab will reject any files that are likely to contain secrets'
           optional :commit_message_regex, type: String, desc: 'All commit messages must match this'
+          optional :branch_name_regex, type: String, desc: 'All branches names must match this'
           optional :author_email_regex, type: String, desc: 'All commit author emails must match this'
           optional :file_name_regex, type: String, desc: 'All commited filenames must not match this'
           optional :max_file_size, type: Integer, desc: 'Maximum file size (MB)'
           at_least_one_of :deny_delete_tag, :member_check, :prevent_secrets,
-                          :commit_message_regex, :author_email_regex,
+                          :commit_message_regex, :branch_name_regex, :author_email_regex,
                           :file_name_regex, :max_file_size
         end
       end

lib/gitlab/checks/change_access.rb

@@ -174,6 +174,10 @@ module Gitlab
           return "Commit message does not follow the pattern '#{push_rule.commit_message_regex}'"
         end
 
+        if @branch_name && !push_rule.branch_name_allowed?(@branch_name)
+          return "Branch name does not follow the pattern '#{push_rule.branch_name_regex}'"
+        end
+
         unless push_rule.author_email_allowed?(commit.committer_email)
           return "Committer's email '#{commit.committer_email}' does not follow the pattern '#{push_rule.author_email_regex}'"
         end

spec/requests/api/project_push_rule_spec.rb

@@ -41,6 +41,7 @@ describe API::ProjectPushRule, 'ProjectPushRule', api: true  do
         post api("/projects/#{project.id}/push_rule", user),
           deny_delete_tag: true,  member_check: true, prevent_secrets: true,
           commit_message_regex: 'JIRA\-\d+',
+          branch_name_regex: '(feature|hotfix)\/*',
           author_email_regex: '[a-zA-Z0-9]+@gitlab.com',
           file_name_regex: '[a-zA-Z0-9]+.key',
           max_file_size: 5
@@ -51,6 +52,7 @@ describe API::ProjectPushRule, 'ProjectPushRule', api: true  do
         expect(json_response['member_check']).to eq(true)
         expect(json_response['prevent_secrets']).to eq(true)
         expect(json_response['commit_message_regex']).to eq('JIRA\-\d+')
+        expect(json_response['branch_name_regex']).to eq('(feature|hotfix)\/*')
         expect(json_response['author_email_regex']).to eq('[a-zA-Z0-9]+@gitlab.com')
         expect(json_response['file_name_regex']).to eq('[a-zA-Z0-9]+.key')
         expect(json_response['max_file_size']).to eq(5)