Merge branch 'fix/error-500-in-pipeline-when-fork' into 'master'

Use project that belongs to pipeline in view

## What does this MR do?

This MR makes project in pipelines view match the one that pipeline has been created for.

Closes #17943 

See merge request !4376

CHANGELOG

@@ -26,6 +26,7 @@ v 8.9.0 (unreleased)
   - Add Application Setting to configure Container Registry token expire delay (default 5min)
 
 v 8.8.3
+  - Fix incorrect links on pipeline page when merge request created from fork
   - Fix gitlab importer failing to import new projects due to missing credentials
   - Fix import URL migration not rescuing with the correct Error
   - In search results, only show notes on confidential issues that the user has access to

app/views/projects/commit/_ci_commit.html.haml

 .row-content-block.build-content.middle-block
   .pull-right
-    - if can?(current_user, :update_pipeline, @project)
+    - if can?(current_user, :update_pipeline, ci_commit.project)
       - if ci_commit.builds.latest.failed.any?(&:retryable?)
-        = link_to "Retry failed", retry_namespace_project_pipeline_path(@project.namespace, @project, ci_commit.id), class: 'btn btn-grouped btn-primary', method: :post
+        = link_to "Retry failed", retry_namespace_project_pipeline_path(ci_commit.project.namespace, ci_commit.project, ci_commit.id), class: 'btn btn-grouped btn-primary', method: :post
 
       - if ci_commit.builds.running_or_pending.any?
-        = link_to "Cancel running", cancel_namespace_project_pipeline_path(@project.namespace, @project, ci_commit.id), data: { confirm: 'Are you sure?' }, class: 'btn btn-grouped btn-danger', method: :post
+        = link_to "Cancel running", cancel_namespace_project_pipeline_path(ci_commit.project.namespace, ci_commit.project, ci_commit.id), data: { confirm: 'Are you sure?' }, class: 'btn btn-grouped btn-danger', method: :post
 
   .oneline.clearfix
     - if defined?(pipeline_details) && pipeline_details
       Pipeline
-      = link_to "##{ci_commit.id}", namespace_project_pipeline_path(@project.namespace, @project, ci_commit.id), class: "monospace"
+      = link_to "##{ci_commit.id}", namespace_project_pipeline_path(ci_commit.project.namespace, ci_commit.project, ci_commit.id), class: "monospace"
       with
       = pluralize ci_commit.statuses.count(:id), "build"
       - if ci_commit.ref
         for
-        = link_to ci_commit.ref, namespace_project_commits_path(@project.namespace, @project, ci_commit.ref), class: "monospace"
+        = link_to ci_commit.ref, namespace_project_commits_path(ci_commit.project.namespace, ci_commit.project, ci_commit.ref), class: "monospace"
       - if defined?(link_to_commit) && link_to_commit
         for commit
-        = link_to ci_commit.short_sha, namespace_project_commit_path(@project.namespace, @project, ci_commit.sha), class: "monospace"
+        = link_to ci_commit.short_sha, namespace_project_commit_path(ci_commit.project.namespace, ci_commit.project, ci_commit.sha), class: "monospace"
       - if ci_commit.duration
         in
         = time_interval_in_words ci_commit.duration
@@ -31,7 +31,7 @@
         %li= error
     You can also test your .gitlab-ci.yml in the #{link_to "Lint", ci_lint_path}
 
-- if @project.builds_enabled? && !ci_commit.ci_yaml_file
+- if ci_commit.project.builds_enabled? && !ci_commit.ci_yaml_file
   .bs-callout.bs-callout-warning
     \.gitlab-ci.yml not found in this commit
 
@@ -45,7 +45,7 @@
         %th Tags
         %th Duration
         %th Finished at
-        - if @project.build_coverage_enabled?
+        - if ci_commit.project.build_coverage_enabled?
           %th Coverage
         %th
     - ci_commit.statuses.stages.each do |stage|

spec/features/merge_requests/created_from_fork_spec.rb

+require 'spec_helper'
+
+feature 'Merge request created from fork' do
+  given(:user) { create(:user) }
+  given(:project) { create(:project, :public) }
+  given(:fork_project) { create(:project, :public) }
+
+  given!(:merge_request) do
+    create(:forked_project_link, forked_to_project: fork_project,
+                                 forked_from_project: project)
+
+    create(:merge_request_with_diffs, source_project: fork_project,
+                                      target_project: project,
+                                      description: 'Test merge request')
+  end
+
+  background do
+    fork_project.team << [user, :master]
+    login_as user
+  end
+
+  scenario 'user can access merge request' do
+    visit_merge_request(merge_request)
+
+    expect(page).to have_content 'Test merge request'
+  end
+
+  context 'pipeline present in source project' do
+    include WaitForAjax
+
+    given(:pipeline) do
+      create(:ci_commit_with_two_jobs, project: fork_project,
+                                       sha: merge_request.last_commit.id,
+                                       ref: merge_request.source_branch)
+    end
+
+    background { pipeline.create_builds(user) }
+
+    scenario 'user visits a pipelines page', js: true do
+      visit_merge_request(merge_request)
+      page.within('.merge-request-tabs') { click_link 'Builds' }
+      wait_for_ajax
+
+      page.within('table.builds') do
+        expect(page).to have_content 'rspec'
+        expect(page).to have_content 'spinach'
+      end
+
+      expect(find_link('Cancel running')[:href])
+        .to include fork_project.path_with_namespace
+    end
+  end
+
+  def visit_merge_request(mr)
+    visit namespace_project_merge_request_path(project.namespace,
+                                               project, mr)
+  end
+end