Migrate Repository.FetchRemote to Gitaly

- `Gitlab::Shell.fetch_remote` now takes a `Gitlab::Git::Repository` instead

GITALY_SERVER_VERSION

-0.33.0
+0.34.0

app/models/repository.rb

@@ -1027,7 +1027,7 @@ class Repository
   end
 
   def fetch_remote(remote, forced: false, no_tags: false)
-    gitlab_shell.fetch_remote(repository_storage_path, disk_path, remote, forced: forced, no_tags: no_tags)
+    gitlab_shell.fetch_remote(raw_repository, remote, forced: forced, no_tags: no_tags)
   end
 
   def fetch_ref(source_path, source_ref, target_ref)

lib/gitlab/git/repository.rb

@@ -46,6 +46,9 @@ module Gitlab
       # Directory name of repo
       attr_reader :name
 
+      # Relative path of repo
+      attr_reader :relative_path
+
       # Rugged repo object
       attr_reader :rugged
 

lib/gitlab/gitaly_client/repository_service.rb

@@ -37,6 +37,22 @@ module Gitlab
         request = Gitaly::ApplyGitattributesRequest.new(repository: @gitaly_repo, revision: revision)
         GitalyClient.call(@storage, :repository_service, :apply_gitattributes, request)
       end
+
+      def fetch_remote(remote, ssh_auth: nil, forced: false, no_tags: false)
+        request = Gitaly::FetchRemoteRequest.new(repository: @gitaly_repo, remote: remote, force: forced, no_tags: no_tags)
+
+        if ssh_auth&.ssh_import?
+          if ssh_auth.ssh_key_auth? && ssh_auth.ssh_private_key.present?
+            request.ssh_key = ssh_auth.ssh_private_key
+          end
+
+          if ssh_auth.ssh_known_hosts.present?
+            request.known_hosts = ssh_auth.ssh_known_hosts
+          end
+        end
+
+        GitalyClient.call(@storage, :repository_service, :fetch_remote, request)
+      end
     end
   end
 end

lib/gitlab/shell.rb

@@ -98,33 +98,24 @@ module Gitlab
 
     # Fetch remote for repository
     #
-    # name - project path with namespace
+    # repository - an instance of Git::Repository
     # remote - remote name
     # forced - should we use --force flag?
     # no_tags - should we use --no-tags flag?
     #
     # Ex.
-    #   fetch_remote("gitlab/gitlab-ci", "upstream")
+    #   fetch_remote(my_repo, "upstream")
     #
     # Gitaly migration: https://gitlab.com/gitlab-org/gitaly/issues/387
-    def fetch_remote(storage, name, remote, ssh_auth: nil, forced: false, no_tags: false)
-      args = [gitlab_shell_projects_path, 'fetch-remote', storage, "#{name}.git", remote, "#{Gitlab.config.gitlab_shell.git_timeout}"]
-      args << '--force' if forced
-      args << '--no-tags' if no_tags
-
-      vars = {}
-
-      if ssh_auth&.ssh_import?
-        if ssh_auth.ssh_key_auth? && ssh_auth.ssh_private_key.present?
-          vars['GITLAB_SHELL_SSH_KEY'] = ssh_auth.ssh_private_key
-        end
-
-        if ssh_auth.ssh_known_hosts.present?
-          vars['GITLAB_SHELL_KNOWN_HOSTS'] = ssh_auth.ssh_known_hosts
+    def fetch_remote(repository, remote, ssh_auth: nil, forced: false, no_tags: false)
+      gitaly_migrate(:fetch_remote) do |is_enabled|
+        if is_enabled
+          repository.gitaly_repository_client.fetch_remote(remote, ssh_auth: ssh_auth, forced: forced, no_tags: no_tags)
+        else
+          storage_path = Gitlab.config.repositories.storages[repository.storage]["path"]
+          local_fetch_remote(storage_path, repository.relative_path, remote, ssh_auth: ssh_auth, forced: forced, no_tags: no_tags)
         end
       end
-
-      gitlab_shell_fast_execute_raise_error(args, vars)
     end
 
     # Move repository
@@ -302,6 +293,26 @@ module Gitlab
 
     private
 
+    def local_fetch_remote(storage, name, remote, ssh_auth: nil, forced: false, no_tags: false)
+      args = [gitlab_shell_projects_path, 'fetch-remote', storage, name, remote, "#{Gitlab.config.gitlab_shell.git_timeout}"]
+      args << '--force' if forced
+      args << '--no-tags' if no_tags
+
+      vars = {}
+
+      if ssh_auth&.ssh_import?
+        if ssh_auth.ssh_key_auth? && ssh_auth.ssh_private_key.present?
+          vars['GITLAB_SHELL_SSH_KEY'] = ssh_auth.ssh_private_key
+        end
+
+        if ssh_auth.ssh_known_hosts.present?
+          vars['GITLAB_SHELL_KNOWN_HOSTS'] = ssh_auth.ssh_known_hosts
+        end
+      end
+
+      gitlab_shell_fast_execute_raise_error(args, vars)
+    end
+
     def gitlab_shell_fast_execute(cmd)
       output, status = gitlab_shell_fast_execute_helper(cmd)
 
@@ -325,5 +336,13 @@ module Gitlab
       # from wasting I/O by searching through GEM_PATH
       Bundler.with_original_env { Popen.popen(cmd, nil, vars) }
     end
+
+    def gitaly_migrate(method, &block)
+      Gitlab::GitalyClient.migrate(method, &block)
+    rescue GRPC::NotFound, GRPC::BadStatus => e
+      # Old Popen code returns [Error, output] to the caller, so we
+      # need to do the same here...
+      raise Error, e
+    end
   end
 end

spec/lib/gitlab/shell_spec.rb

@@ -186,22 +186,48 @@ describe Gitlab::Shell do
       end
     end
 
-    describe '#fetch_remote' do
+    shared_examples 'fetch_remote' do |gitaly_on|
+      let(:project2) { create(:project, :repository) }
+      let(:repository) { project2.repository }
+
       def fetch_remote(ssh_auth = nil)
-        gitlab_shell.fetch_remote('current/storage', 'project/path', 'new/storage', ssh_auth: ssh_auth)
+        gitlab_shell.fetch_remote(repository.raw_repository, 'new/storage', ssh_auth: ssh_auth)
       end
 
-      def expect_popen(vars = {})
+      def expect_popen(fail = false, vars = {})
         popen_args = [
           projects_path,
           'fetch-remote',
-          'current/storage',
-          'project/path.git',
+          TestEnv.repos_path,
+          repository.relative_path,
           'new/storage',
           Gitlab.config.gitlab_shell.git_timeout.to_s
         ]
 
-        expect(Gitlab::Popen).to receive(:popen).with(popen_args, nil, popen_vars.merge(vars))
+        return_value = fail ? ["error", 1] : [nil, 0]
+
+        expect(Gitlab::Popen).to receive(:popen).with(popen_args, nil, popen_vars.merge(vars)).and_return(return_value)
+      end
+
+      def expect_gitaly_call(fail, vars = {})
+        receive_fetch_remote =
+          if fail
+            receive(:fetch_remote).and_raise(GRPC::NotFound)
+          else
+            receive(:fetch_remote).and_return(true)
+          end
+
+        expect_any_instance_of(Gitlab::GitalyClient::RepositoryService).to receive_fetch_remote
+      end
+
+      if gitaly_on
+        def expect_call(fail, vars = {})
+          expect_gitaly_call(fail, vars)
+        end
+      else
+        def expect_call(fail, vars = {})
+          expect_popen(fail, vars)
+        end
       end
 
       def build_ssh_auth(opts = {})
@@ -216,20 +242,20 @@ describe Gitlab::Shell do
       end
 
       it 'returns true when the command succeeds' do
-        expect_popen.and_return([nil, 0])
+        expect_call(false)
 
         expect(fetch_remote).to be_truthy
       end
 
       it 'raises an exception when the command fails' do
-        expect_popen.and_return(["error", 1])
+        expect_call(true)
 
-        expect { fetch_remote }.to raise_error(Gitlab::Shell::Error, "error")
+        expect { fetch_remote }.to raise_error(Gitlab::Shell::Error)
       end
 
       context 'SSH auth' do
         it 'passes the SSH key if specified' do
-          expect_popen('GITLAB_SHELL_SSH_KEY' => 'foo').and_return([nil, 0])
+          expect_call(false, 'GITLAB_SHELL_SSH_KEY' => 'foo')
 
           ssh_auth = build_ssh_auth(ssh_key_auth?: true, ssh_private_key: 'foo')
 
@@ -237,7 +263,7 @@ describe Gitlab::Shell do
         end
 
         it 'does not pass an empty SSH key' do
-          expect_popen.and_return([nil, 0])
+          expect_call(false)
 
           ssh_auth = build_ssh_auth(ssh_key_auth: true, ssh_private_key: '')
 
@@ -245,7 +271,7 @@ describe Gitlab::Shell do
         end
 
         it 'does not pass the key unless SSH key auth is to be used' do
-          expect_popen.and_return([nil, 0])
+          expect_call(false)
 
           ssh_auth = build_ssh_auth(ssh_key_auth: false, ssh_private_key: 'foo')
 
@@ -253,7 +279,7 @@ describe Gitlab::Shell do
         end
 
         it 'passes the known_hosts data if specified' do
-          expect_popen('GITLAB_SHELL_KNOWN_HOSTS' => 'foo').and_return([nil, 0])
+          expect_call(false, 'GITLAB_SHELL_KNOWN_HOSTS' => 'foo')
 
           ssh_auth = build_ssh_auth(ssh_known_hosts: 'foo')
 
@@ -261,7 +287,7 @@ describe Gitlab::Shell do
         end
 
         it 'does not pass empty known_hosts data' do
-          expect_popen.and_return([nil, 0])
+          expect_call(false)
 
           ssh_auth = build_ssh_auth(ssh_known_hosts: '')
 
@@ -269,7 +295,7 @@ describe Gitlab::Shell do
         end
 
         it 'does not pass known_hosts data unless SSH is to be used' do
-          expect_popen(popen_vars).and_return([nil, 0])
+          expect_call(false, popen_vars)
 
           ssh_auth = build_ssh_auth(ssh_import?: false, ssh_known_hosts: 'foo')
 
@@ -278,6 +304,14 @@ describe Gitlab::Shell do
       end
     end
 
+    describe '#fetch_remote local', skip_gitaly_mock: true do
+      it_should_behave_like 'fetch_remote', false
+    end
+
+    describe '#fetch_remote gitaly' do
+      it_should_behave_like 'fetch_remote', true
+    end
+
     describe '#import_repository' do
       it 'returns true when the command succeeds' do
         expect(Gitlab::Popen).to receive(:popen)