From 1bda1e62def69bc0525a558f92acf182dc05fe8d Mon Sep 17 00:00:00 2001 From: Sean McGivern Date: Mon, 29 Aug 2016 12:43:09 +0100 Subject: [PATCH] Fix resolving conflicts on forks Forks may not be up-to-date with the target project, and so might not contain one of the parent refs in their repo. Fetch this if it isn't present. --- CHANGELOG | 3 + .../merge_requests/resolve_service.rb | 16 +++- .../merge_requests/resolve_service_spec.rb | 87 +++++++++++++++++++ spec/support/test_env.rb | 47 +++++----- 4 files changed, 132 insertions(+), 21 deletions(-) create mode 100644 spec/services/merge_requests/resolve_service_spec.rb diff --git a/CHANGELOG b/CHANGELOG index d06fc24d40a..d95072d9952 100644 --- a/CHANGELOG +++ b/CHANGELOG @@ -36,6 +36,9 @@ v 8.12.0 (unreleased) - Use the default branch for displaying the project icon instead of master !5792 (Hannes Rosenögger) - Adds response mime type to transaction metric action when it's not HTML +v 8.11.4 (unreleased) + - Fix resolving conflicts on forks + v 8.11.3 (unreleased) - Allow system info page to handle case where info is unavailable - Label list shows all issues (opened or closed) with that label diff --git a/app/services/merge_requests/resolve_service.rb b/app/services/merge_requests/resolve_service.rb index adc71b0c2bc..bd8b9f8cfd4 100644 --- a/app/services/merge_requests/resolve_service.rb +++ b/app/services/merge_requests/resolve_service.rb @@ -1,11 +1,14 @@ module MergeRequests class ResolveService < MergeRequests::BaseService - attr_accessor :conflicts, :rugged, :merge_index + attr_accessor :conflicts, :rugged, :merge_index, :merge_request def execute(merge_request) @conflicts = merge_request.conflicts @rugged = project.repository.rugged @merge_index = conflicts.merge_index + @merge_request = merge_request + + fetch_their_commit! conflicts.files.each do |file| write_resolved_file_to_index(file, params[:sections]) @@ -27,5 +30,16 @@ module MergeRequests merge_index.add(path: our_path, oid: rugged.write(new_file, :blob), mode: file.our_mode) merge_index.conflict_remove(our_path) end + + # If their commit (in the target project) doesn't exist in the source project, it + # can't be a parent for the merge commit we're about to create. If that's the case, + # fetch the target branch ref into the source project so the commit exists in both. + # + def fetch_their_commit! + return if rugged.include?(conflicts.their_commit.oid) + + remote = rugged.remotes.create_anonymous(merge_request.target_project.repository.path_to_repo) + remote.fetch(merge_request.target_branch) + end end end diff --git a/spec/services/merge_requests/resolve_service_spec.rb b/spec/services/merge_requests/resolve_service_spec.rb new file mode 100644 index 00000000000..d71932458fa --- /dev/null +++ b/spec/services/merge_requests/resolve_service_spec.rb @@ -0,0 +1,87 @@ +require 'spec_helper' + +describe MergeRequests::ResolveService do + let(:user) { create(:user) } + let(:project) { create(:project) } + + let(:fork_project) do + create(:forked_project_with_submodules) do |fork_project| + fork_project.build_forked_project_link(forked_to_project_id: fork_project.id, forked_from_project_id: project.id) + fork_project.save + end + end + + let(:merge_request) do + create(:merge_request, + source_branch: 'conflict-resolvable', source_project: project, + target_branch: 'conflict-start') + end + + let(:merge_request_from_fork) do + create(:merge_request, + source_branch: 'conflict-resolvable-fork', source_project: fork_project, + target_branch: 'conflict-start', target_project: project) + end + + describe '#execute' do + context 'with valid params' do + let(:params) do + { + sections: { + '2f6fcd96b88b36ce98c38da085c795a27d92a3dd_14_14' => 'head', + '6eb14e00385d2fb284765eb1cd8d420d33d63fc9_9_9' => 'head', + '6eb14e00385d2fb284765eb1cd8d420d33d63fc9_21_21' => 'origin', + '6eb14e00385d2fb284765eb1cd8d420d33d63fc9_49_49' => 'origin' + }, + commit_message: 'This is a commit message!' + } + end + + context 'when the source and target project are the same' do + before do + MergeRequests::ResolveService.new(project, user, params).execute(merge_request) + end + + it 'creates a commit with the message' do + expect(merge_request.source_branch_head.message).to eq(params[:commit_message]) + end + + it 'creates a commit with the correct parents' do + expect(merge_request.source_branch_head.parents.map(&:id)). + to eq(['1450cd639e0bc6721eb02800169e464f212cde06', + '75284c70dd26c87f2a3fb65fd5a1f0b0138d3a6b']) + end + end + + context 'when the source project is a fork and does not contain the HEAD of the target branch' do + let!(:target_head) do + project.repository.commit_file(user, 'new-file-in-target', '', 'Add new file in target', 'conflict-start', false) + end + + before do + MergeRequests::ResolveService.new(fork_project, user, params).execute(merge_request_from_fork) + end + + it 'creates a commit with the message' do + expect(merge_request_from_fork.source_branch_head.message).to eq(params[:commit_message]) + end + + it 'creates a commit with the correct parents' do + expect(merge_request_from_fork.source_branch_head.parents.map(&:id)). + to eq(['404fa3fc7c2c9b5dacff102f353bdf55b1be2813', + target_head]) + end + end + end + + context 'when a resolution is missing' do + let(:invalid_params) { { sections: { '2f6fcd96b88b36ce98c38da085c795a27d92a3dd_14_14' => 'head' } } } + let(:service) { MergeRequests::ResolveService.new(project, user, invalid_params) } + + it 'raises a MissingResolution error' do + expect { service.execute(merge_request) }. + to raise_error(Gitlab::Conflict::File::MissingResolution) + end + end + end +end diff --git a/spec/support/test_env.rb b/spec/support/test_env.rb index c7a45fc4ff9..0097dbf8fad 100644 --- a/spec/support/test_env.rb +++ b/spec/support/test_env.rb @@ -6,7 +6,7 @@ module TestEnv # When developing the seed repository, comment out the branch you will modify. BRANCH_SHA = { 'empty-branch' => '7efb185', - 'ends-with.json' => '98b0d8b3', + 'ends-with.json' => '98b0d8b', 'flatten-dir' => 'e56497b', 'feature' => '0b4bc9a', 'feature_conflict' => 'bb5206f', @@ -37,9 +37,10 @@ module TestEnv # need to keep all the branches in sync. # We currently only need a subset of the branches FORKED_BRANCH_SHA = { - 'add-submodule-version-bump' => '3f547c08', - 'master' => '5937ac0', - 'remove-submodule' => '2a33e0c0' + 'add-submodule-version-bump' => '3f547c0', + 'master' => '5937ac0', + 'remove-submodule' => '2a33e0c', + 'conflict-resolvable-fork' => '404fa3f' } # Test environment @@ -117,22 +118,7 @@ module TestEnv system(*%W(#{Gitlab.config.git.bin_path} clone -q #{clone_url} #{repo_path})) end - Dir.chdir(repo_path) do - branch_sha.each do |branch, sha| - # Try to reset without fetching to avoid using the network. - reset = %W(#{Gitlab.config.git.bin_path} update-ref refs/heads/#{branch} #{sha}) - unless system(*reset) - if system(*%W(#{Gitlab.config.git.bin_path} fetch origin)) - unless system(*reset) - raise 'The fetched test seed '\ - 'does not contain the required revision.' - end - else - raise 'Could not fetch test seed repository.' - end - end - end - end + set_repo_refs(repo_path, branch_sha) # We must copy bare repositories because we will push to them. system(git_env, *%W(#{Gitlab.config.git.bin_path} clone -q --bare #{repo_path} #{repo_path_bare})) @@ -144,6 +130,7 @@ module TestEnv FileUtils.mkdir_p(target_repo_path) FileUtils.cp_r("#{base_repo_path}/.", target_repo_path) FileUtils.chmod_R 0755, target_repo_path + set_repo_refs(target_repo_path, BRANCH_SHA) end def repos_path @@ -160,6 +147,7 @@ module TestEnv FileUtils.mkdir_p(target_repo_path) FileUtils.cp_r("#{base_repo_path}/.", target_repo_path) FileUtils.chmod_R 0755, target_repo_path + set_repo_refs(target_repo_path, FORKED_BRANCH_SHA) end # When no cached assets exist, manually hit the root path to create them @@ -209,4 +197,23 @@ module TestEnv def git_env { 'GIT_TEMPLATE_DIR' => '' } end + + def set_repo_refs(repo_path, branch_sha) + Dir.chdir(repo_path) do + branch_sha.each do |branch, sha| + # Try to reset without fetching to avoid using the network. + reset = %W(#{Gitlab.config.git.bin_path} update-ref refs/heads/#{branch} #{sha}) + unless system(*reset) + if system(*%W(#{Gitlab.config.git.bin_path} fetch origin)) + unless system(*reset) + raise 'The fetched test seed '\ + 'does not contain the required revision.' + end + else + raise 'Could not fetch test seed repository.' + end + end + end + end + end end