Reverse ref and sha in args and rename pipeline to pipeline_for

app/models/merge_request.rb

@@ -666,7 +666,8 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def pipeline
-    @pipeline ||= source_project.pipeline(diff_head_sha, source_branch) if diff_head_sha && source_project
+    return unless diff_head_sha && source_project
+    @pipeline ||= source_project.pipeline_for(source_branch, diff_head_sha)
   end
 
   def merge_commit

app/models/project.rb

@@ -1086,12 +1086,13 @@ class Project < ActiveRecord::Base
     !namespace.share_with_group_lock
   end
 
-  def pipeline(sha, ref)
+  def pipeline_for(ref, sha)
     pipelines.order(id: :desc).find_by(sha: sha, ref: ref)
   end
 
-  def ensure_pipeline(sha, ref, current_user = nil)
+  def ensure_pipeline(ref, sha, current_user = nil)
-    pipeline(sha, ref) || pipelines.create(sha: sha, ref: ref, user: current_user)
+    pipeline_for(ref, sha) ||
+      pipelines.create(sha: sha, ref: ref, user: current_user)
   end
 
   def enable_ci

app/views/projects/issues/_related_branches.html.haml

@@ -5,7 +5,7 @@
     - @related_branches.each do |branch|
       %li
         - target = @project.repository.find_branch(branch).target
-        - pipeline = @project.pipeline(target.sha, branch) if target
+        - pipeline = @project.pipeline_for(branch, target.sha) if target
         - if pipeline
           %span.related-branch-ci-status
             = render_pipeline_status(pipeline)

db/fixtures/development/14_builds.rb

@@ -40,7 +40,7 @@ class Gitlab::Seeder::Builds
     commits = @project.repository.commits('master', limit: 5)
     commits_sha = commits.map { |commit| commit.raw.id }
     commits_sha.map do |sha|
-      @project.ensure_pipeline(sha, 'master')
+      @project.ensure_pipeline('master', sha)
     end
   rescue
     []

lib/api/commit_statuses.rb

@@ -64,7 +64,7 @@ module API
           ref = branches.first
         end
 
-        pipeline = @project.ensure_pipeline(commit.sha, ref, current_user)
+        pipeline = @project.ensure_pipeline(ref, commit.sha, current_user)
 
         name = params[:name] || params[:context]
         status = GenericCommitStatus.running_or_pending.find_by(pipeline: pipeline, name: name, ref: params[:ref])

spec/models/project_spec.rb

@@ -688,7 +688,7 @@ describe Project, models: true do
     let(:project) { create :project }
     let(:pipeline) { create :ci_pipeline, project: project, ref: 'master' }
 
-    subject { project.pipeline(pipeline.sha, 'master') }
+    subject { project.pipeline_for('master', pipeline.sha) }
 
     it { is_expected.to eq(pipeline) }
 

spec/requests/api/commits_spec.rb

@@ -94,7 +94,7 @@ describe API::API, api: true  do
       end
 
       it "returns status for CI" do
-        pipeline = project.ensure_pipeline(project.repository.commit.sha, 'master')
+        pipeline = project.ensure_pipeline('master', project.repository.commit.sha)
         get api("/projects/#{project.id}/repository/commits/#{project.repository.commit.id}", user)
         expect(response).to have_http_status(200)
         expect(json_response['status']).to eq(pipeline.status)

spec/services/ci/image_for_build_service_spec.rb

@@ -5,7 +5,7 @@ module Ci
     let(:service) { ImageForBuildService.new }
     let(:project) { FactoryGirl.create(:empty_project) }
     let(:commit_sha) { '01234567890123456789' }
-    let(:commit) { project.ensure_pipeline(commit_sha, 'master') }
+    let(:commit) { project.ensure_pipeline('master', commit_sha) }
     let(:build) { FactoryGirl.create(:ci_build, pipeline: commit) }
 
     describe '#execute' do