Indicate how much an MR branch diverges from the target branch

parent 566ea854
......@@ -6,6 +6,7 @@ v 8.6.0 (unreleased)
- Fix issue when pushing to projects ending in .wiki
- Fix avatar stretching by providing a cropping feature (Johann Pardanaud)
- Don't load all of GitLab in mail_room
- Indicate how much an MR diverged from the target branch (Pierre de La Morinerie)
- Strip leading and trailing spaces in URL validator (evuez)
- Return empty array instead of 404 when commit has no statuses in commit status API
- Update documentation to reflect Guest role not being enforced on internal projects
......
......@@ -524,6 +524,29 @@ def in_locked_state
end
end
def diverged_commits_count
cache = Rails.cache.read(:"merge_request_#{id}_diverged_commits")
if cache.blank? || cache[:source_sha] != source_sha || cache[:target_sha] != target_sha
cache = {
source_sha: source_sha,
target_sha: target_sha,
diverged_commits_count: compute_diverged_commits_count
}
Rails.cache.write(:"merge_request_#{id}_diverged_commits", cache)
end
cache[:diverged_commits_count]
end
def compute_diverged_commits_count
Gitlab::Git::Commit.between(target_project.repository.raw_repository, source_sha, target_sha).size
end
def diverged_from_target_branch?
diverged_commits_count > 0
end
def ci_commit
@ci_commit ||= source_project.ci_commit(last_commit.id) if last_commit && source_project
end
......
......@@ -34,6 +34,8 @@
%span into
= link_to namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch" do
= @merge_request.target_branch
- if @merge_request.open? && @merge_request.diverged_from_target_branch?
%span (#{pluralize(@merge_request.diverged_commits_count, 'commit')} behind)
= render "projects/merge_requests/show/how_to_merge"
= render "projects/merge_requests/widget/show.html.haml"
......
......@@ -26,6 +26,16 @@ Feature: Project Merge Requests
When I visit project "Shop" merge requests page
Then I should see "other_branch" branch
Scenario: I should not see the numbers of diverged commits if the branch is rebased on the target
Given project "Shop" have "Bug NS-07" open merge request with rebased branch
When I visit merge request page "Bug NS-07"
Then I should not see the diverged commits count
Scenario: I should see the numbers of diverged commits if the branch diverged from the target
Given project "Shop" have "Bug NS-08" open merge request with diverged branch
When I visit merge request page "Bug NS-08"
Then I should see the diverged commits count
Scenario: I should see rejected merge requests
Given I click link "Closed"
Then I should see "Feature NS-03" in merge requests
......
......@@ -60,7 +60,6 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
expect(page).not_to have_content "Feature NS-03"
end
step 'I should not see "Bug NS-04" in merge requests' do
expect(page).not_to have_content "Bug NS-04"
end
......@@ -121,6 +120,22 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
author: project.users.first)
end
step 'project "Shop" have "Bug NS-07" open merge request with rebased branch' do
create(:merge_request, :rebased,
title: "Bug NS-07",
source_project: project,
target_project: project,
author: project.users.first)
end
step 'project "Shop" have "Bug NS-08" open merge request with diverged branch' do
create(:merge_request, :diverged,
title: "Bug NS-08",
source_project: project,
target_project: project,
author: project.users.first)
end
step 'project "Shop" have "Feature NS-03" closed merge request' do
create(:closed_merge_request,
title: "Feature NS-03",
......@@ -490,6 +505,18 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
end
end
step 'I should see the diverged commits count' do
page.within ".mr-source-target" do
expect(page).to have_content /([0-9]+ commits behind)/
end
end
step 'I should not see the diverged commits count' do
page.within ".mr-source-target" do
expect(page).not_to have_content /([0-9]+ commit[s]? behind)/
end
end
step 'I should see "Bug NS-05" at the top' do
expect(page.find('ul.content-list.mr-list li.merge-request:first-child')).to have_content("Bug NS-05")
end
......
......@@ -395,6 +395,14 @@ module SharedPaths
visit merge_request_path("Bug NS-05")
end
step 'I visit merge request page "Bug NS-07"' do
visit merge_request_path("Bug NS-07")
end
step 'I visit merge request page "Bug NS-08"' do
visit merge_request_path("Bug NS-08")
end
step 'I visit merge request page "Bug CO-01"' do
mr = MergeRequest.find_by(title: "Bug CO-01")
visit namespace_project_merge_request_path(mr.target_project.namespace, mr.target_project, mr)
......
......@@ -69,6 +69,16 @@
target_branch "master"
end
trait :rebased do
source_branch "markdown"
target_branch "improve/awesome"
end
trait :diverged do
source_branch "feature"
target_branch "master"
end
trait :merge_when_build_succeeds do
merge_when_build_succeeds true
merge_user author
......
......@@ -274,6 +274,70 @@
end
end
describe '#diverged_commits_count' do
let(:project) { create(:project) }
let(:fork_project) { create(:project, forked_from_project: project) }
context 'diverged on same repository' do
subject(:merge_request_with_divergence) { create(:merge_request, :diverged, source_project: project, target_project: project) }
it 'counts commits that are on target branch but not on source branch' do
expect(subject.diverged_commits_count).to eq(5)
end
end
context 'diverged on fork' do
subject(:merge_request_fork_with_divergence) { create(:merge_request, :diverged, source_project: fork_project, target_project: project) }
it 'counts commits that are on target branch but not on source branch' do
expect(subject.diverged_commits_count).to eq(5)
end
end
context 'rebased on fork' do
subject(:merge_request_rebased) { create(:merge_request, :rebased, source_project: fork_project, target_project: project) }
it 'counts commits that are on target branch but not on source branch' do
expect(subject.diverged_commits_count).to eq(0)
end
end
describe 'caching' do
before(:example) do
allow(Rails).to receive(:cache).and_return(ActiveSupport::Cache::MemoryStore.new)
end
it 'caches the output' do
expect(subject).to receive(:compute_diverged_commits_count).
once.
and_return(2)
subject.diverged_commits_count
subject.diverged_commits_count
end
it 'invalidates the cache when the source sha changes' do
expect(subject).to receive(:compute_diverged_commits_count).
twice.
and_return(2)
subject.diverged_commits_count
allow(subject).to receive(:source_sha).and_return('123abc')
subject.diverged_commits_count
end
it 'invalidates the cache when the target sha changes' do
expect(subject).to receive(:compute_diverged_commits_count).
twice.
and_return(2)
subject.diverged_commits_count
allow(subject).to receive(:target_sha).and_return('123abc')
subject.diverged_commits_count
end
end
end
it_behaves_like 'an editable mentionable' do
subject { create(:merge_request) }
......
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