Merge branch 'feature/implement-user-revert-rpc' into 'master'

Implement UserRevert RPC

Closes #781

See merge request gitlab-org/gitaly!471

18 files changed, 954 insertions, 148 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b3a0d71d7..287efebc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 UNRELEASED
 
+- Implement UserRevert RPC
+  https://gitlab.com/gitlab-org/gitaly/merge_requests/471
 - Fix commit message encoding and support alternates in CatFile
   https://gitlab.com/gitlab-org/gitaly/merge_requests/469
 - Raise an exception when Git::Env.all is called
diff --git a/internal/service/operations/branches_test.go b/internal/service/operations/branches_test.go
index 2f56c2286..82b3d0191 100644
--- a/internal/service/operations/branches_test.go
+++ b/internal/service/operations/branches_test.go
@@ -114,6 +114,7 @@ func TestSuccessfulGitHooksForUserCreateBranchRequest(t *testing.T) {
 
 			hookPath, hookOutputTempPath := WriteEnvToHook(t, testRepoPath, hookName)
 			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
 
 			ctx, cancel := testhelper.Context()
 			defer cancel()
@@ -313,6 +314,7 @@ func TestSuccessfulGitHooksForUserDeleteBranchRequest(t *testing.T) {
 
 			hookPath, hookOutputTempPath := WriteEnvToHook(t, testRepoPath, hookName)
 			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
 
 			ctx, cancel := testhelper.Context()
 			defer cancel()
diff --git a/internal/service/operations/cherry_pick.go b/internal/service/operations/cherry_pick.go
index 599bcf93c..e73b63467 100644
--- a/internal/service/operations/cherry_pick.go
+++ b/internal/service/operations/cherry_pick.go
@@ -1,8 +1,6 @@
 package operations
 
 import (
-	"fmt"
-
 	pb "gitlab.com/gitlab-org/gitaly-proto/go"
 
 	"gitlab.com/gitlab-org/gitaly/internal/rubyserver"
@@ -12,7 +10,7 @@ import (
 )
 
 func (s *server) UserCherryPick(ctx context.Context, req *pb.UserCherryPickRequest) (*pb.UserCherryPickResponse, error) {
-	if err := validateUserCherryPickRequest(req); err != nil {
+	if err := validateCherryPickOrRevertRequest(req); err != nil {
 		return nil, grpc.Errorf(codes.InvalidArgument, "UserCherryPick: %v", err)
 	}
 
@@ -28,23 +26,3 @@ func (s *server) UserCherryPick(ctx context.Context, req *pb.UserCherryPickReque
 
 	return client.UserCherryPick(clientCtx, req)
 }
-
-func validateUserCherryPickRequest(req *pb.UserCherryPickRequest) error {
-	if req.User == nil {
-		return fmt.Errorf("empty User")
-	}
-
-	if req.Commit == nil {
-		return fmt.Errorf("empty Commit")
-	}
-
-	if len(req.BranchName) == 0 {
-		return fmt.Errorf("empty BranchName")
-	}
-
-	if len(req.Message) == 0 {
-		return fmt.Errorf("empty Message")
-	}
-
-	return nil
-}
diff --git a/internal/service/operations/cherry_pick_test.go b/internal/service/operations/cherry_pick_test.go
index a6e851571..36f21d1cb 100644
--- a/internal/service/operations/cherry_pick_test.go
+++ b/internal/service/operations/cherry_pick_test.go
@@ -164,6 +164,7 @@ func TestSuccessfulGitHooksForUserCherryPickRequest(t *testing.T) {
 		t.Run(hookName, func(t *testing.T) {
 			hookPath, hookOutputTempPath := operations.WriteEnvToHook(t, testRepoPath, hookName)
 			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
 
 			md := testhelper.GitalyServersMetadata(t, serverSocketPath)
 			ctx := metadata.NewOutgoingContext(ctxOuter, md)
diff --git a/internal/service/operations/revert.go b/internal/service/operations/revert.go
new file mode 100644
index 000000000..af1435922
--- /dev/null
+++ b/internal/service/operations/revert.go
@@ -0,0 +1,28 @@
+package operations
+
+import (
+	pb "gitlab.com/gitlab-org/gitaly-proto/go"
+
+	"gitlab.com/gitlab-org/gitaly/internal/rubyserver"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+)
+
+func (s *server) UserRevert(ctx context.Context, req *pb.UserRevertRequest) (*pb.UserRevertResponse, error) {
+	if err := validateCherryPickOrRevertRequest(req); err != nil {
+		return nil, grpc.Errorf(codes.InvalidArgument, "UserRevert: %v", err)
+	}
+
+	client, err := s.OperationServiceClient(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	clientCtx, err := rubyserver.SetHeaders(ctx, req.GetRepository())
+	if err != nil {
+		return nil, err
+	}
+
+	return client.UserRevert(clientCtx, req)
+}
diff --git a/internal/service/operations/revert_test.go b/internal/service/operations/revert_test.go
new file mode 100644
index 000000000..a6132c195
--- /dev/null
+++ b/internal/service/operations/revert_test.go
@@ -0,0 +1,401 @@
+package operations_test
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"testing"
+
+	"gitlab.com/gitlab-org/gitaly/internal/git/log"
+	"gitlab.com/gitlab-org/gitaly/internal/service/operations"
+	"gitlab.com/gitlab-org/gitaly/internal/testhelper"
+
+	pb "gitlab.com/gitlab-org/gitaly-proto/go"
+
+	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+)
+
+func TestSuccessfulUserRevertRequest(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, testRepoPath, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	destinationBranch := "revert-dst"
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", destinationBranch, "master")
+
+	masterHeadCommit, err := log.GetCommit(ctxOuter, testRepo, "master", "")
+	require.NoError(t, err)
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, "d59c60028b053793cecfb4022de34602e1a9218e", "")
+	require.NoError(t, err)
+
+	testRepoCopy, _, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	testCases := []struct {
+		desc         string
+		request      *pb.UserRevertRequest
+		branchUpdate *pb.OperationBranchUpdate
+	}{
+		{
+			desc: "branch exists",
+			request: &pb.UserRevertRequest{
+				Repository: testRepo,
+				User:       user,
+				Commit:     revertedCommit,
+				BranchName: []byte(destinationBranch),
+				Message:    []byte("Reverting " + revertedCommit.Id),
+			},
+			branchUpdate: &pb.OperationBranchUpdate{},
+		},
+		{
+			desc: "nonexistent branch + start_repository == repository",
+			request: &pb.UserRevertRequest{
+				Repository:      testRepo,
+				User:            user,
+				Commit:          revertedCommit,
+				BranchName:      []byte("to-be-reverted-into-1"),
+				Message:         []byte("Reverting " + revertedCommit.Id),
+				StartBranchName: []byte("master"),
+			},
+			branchUpdate: &pb.OperationBranchUpdate{BranchCreated: true},
+		},
+		{
+			desc: "nonexistent branch + start_repository != repository",
+			request: &pb.UserRevertRequest{
+				Repository:      testRepo,
+				User:            user,
+				Commit:          revertedCommit,
+				BranchName:      []byte("to-be-reverted-into-2"),
+				Message:         []byte("Reverting " + revertedCommit.Id),
+				StartRepository: testRepoCopy,
+				StartBranchName: []byte("master"),
+			},
+			branchUpdate: &pb.OperationBranchUpdate{BranchCreated: true},
+		},
+		{
+			desc: "nonexistent branch + empty start_repository",
+			request: &pb.UserRevertRequest{
+				Repository:      testRepo,
+				User:            user,
+				Commit:          revertedCommit,
+				BranchName:      []byte("to-be-reverted-into-3"),
+				Message:         []byte("Reverting " + revertedCommit.Id),
+				StartBranchName: []byte("master"),
+			},
+			branchUpdate: &pb.OperationBranchUpdate{BranchCreated: true},
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.desc, func(t *testing.T) {
+			md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+			ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+			response, err := client.UserRevert(ctx, testCase.request)
+			require.NoError(t, err)
+
+			headCommit, err := log.GetCommit(ctx, testRepo, string(testCase.request.BranchName), "")
+			require.NoError(t, err)
+
+			expectedBranchUpdate := testCase.branchUpdate
+			expectedBranchUpdate.CommitId = headCommit.Id
+
+			require.Equal(t, expectedBranchUpdate, response.BranchUpdate)
+			require.Equal(t, testCase.request.Message, headCommit.Subject)
+			require.Equal(t, masterHeadCommit.Id, headCommit.ParentIds[0])
+		})
+	}
+}
+
+func TestSuccessfulGitHooksForUserRevertRequest(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, testRepoPath, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	destinationBranch := "revert-dst"
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", destinationBranch, "master")
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, "d59c60028b053793cecfb4022de34602e1a9218e", "")
+	require.NoError(t, err)
+
+	request := &pb.UserRevertRequest{
+		Repository: testRepo,
+		User:       user,
+		Commit:     revertedCommit,
+		BranchName: []byte(destinationBranch),
+		Message:    []byte("Reverting " + revertedCommit.Id),
+	}
+
+	for _, hookName := range operations.GitlabHooks {
+		t.Run(hookName, func(t *testing.T) {
+			hookPath, hookOutputTempPath := operations.WriteEnvToHook(t, testRepoPath, hookName)
+			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
+
+			md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+			ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+			response, err := client.UserRevert(ctx, request)
+			require.NoError(t, err)
+			require.Empty(t, response.PreReceiveError)
+
+			output := string(testhelper.MustReadFile(t, hookOutputTempPath))
+			require.Contains(t, output, "GL_ID="+user.GlId)
+			require.Contains(t, output, "GL_USERNAME="+user.GlUsername)
+		})
+	}
+}
+
+func TestFailedUserRevertRequestDueToValidations(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, _, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, "d59c60028b053793cecfb4022de34602e1a9218e", "")
+	require.NoError(t, err)
+
+	destinationBranch := "revert-dst"
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	testCases := []struct {
+		desc    string
+		request *pb.UserRevertRequest
+		code    codes.Code
+	}{
+		{
+			desc: "empty user",
+			request: &pb.UserRevertRequest{
+				Repository: testRepo,
+				User:       nil,
+				Commit:     revertedCommit,
+				BranchName: []byte(destinationBranch),
+				Message:    []byte("Reverting " + revertedCommit.Id),
+			},
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "empty commit",
+			request: &pb.UserRevertRequest{
+				Repository: testRepo,
+				User:       user,
+				Commit:     nil,
+				BranchName: []byte(destinationBranch),
+				Message:    []byte("Reverting " + revertedCommit.Id),
+			},
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "empty branch name",
+			request: &pb.UserRevertRequest{
+				Repository: testRepo,
+				User:       user,
+				Commit:     revertedCommit,
+				BranchName: nil,
+				Message:    []byte("Reverting " + revertedCommit.Id),
+			},
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "empty message",
+			request: &pb.UserRevertRequest{
+				Repository: testRepo,
+				User:       user,
+				Commit:     revertedCommit,
+				BranchName: []byte(destinationBranch),
+				Message:    nil,
+			},
+			code: codes.InvalidArgument,
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.desc, func(t *testing.T) {
+			md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+			ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+			_, err := client.UserRevert(ctx, testCase.request)
+			testhelper.AssertGrpcError(t, err, testCase.code, "")
+		})
+	}
+}
+
+func TestFailedUserRevertRequestDueToPreReceiveError(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, testRepoPath, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	destinationBranch := "revert-dst"
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", destinationBranch, "master")
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, "d59c60028b053793cecfb4022de34602e1a9218e", "")
+	require.NoError(t, err)
+
+	request := &pb.UserRevertRequest{
+		Repository: testRepo,
+		User:       user,
+		Commit:     revertedCommit,
+		BranchName: []byte(destinationBranch),
+		Message:    []byte("Reverting " + revertedCommit.Id),
+	}
+
+	hookContent := []byte("#!/bin/sh\necho GL_ID=$GL_ID\nexit 1")
+
+	for _, hookName := range operations.GitlabPreHooks {
+		t.Run(hookName, func(t *testing.T) {
+			hookPath := path.Join(testRepoPath, "hooks", hookName)
+			require.NoError(t, ioutil.WriteFile(hookPath, hookContent, 0755))
+			defer os.Remove(hookPath)
+
+			md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+			ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+			response, err := client.UserRevert(ctx, request)
+			require.NoError(t, err)
+			require.Contains(t, response.PreReceiveError, "GL_ID="+user.GlId)
+		})
+	}
+}
+
+func TestFailedUserRevertRequestDueToCreateTreeError(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, testRepoPath, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	destinationBranch := "revert-dst"
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", destinationBranch, "master")
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	// This revert patch of the following commit cannot be applied to the destinationBranch above
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, "372ab6950519549b14d220271ee2322caa44d4eb", "")
+	require.NoError(t, err)
+
+	request := &pb.UserRevertRequest{
+		Repository: testRepo,
+		User:       user,
+		Commit:     revertedCommit,
+		BranchName: []byte(destinationBranch),
+		Message:    []byte("Reverting " + revertedCommit.Id),
+	}
+
+	md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+	ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+	response, err := client.UserRevert(ctx, request)
+	require.NoError(t, err)
+	require.Equal(t, "Gitlab::Git::Repository::CreateTreeError", response.CreateTreeError)
+}
+
+func TestFailedUserRevertRequestDueToCommitError(t *testing.T) {
+	ctxOuter, cancel := testhelper.Context()
+	defer cancel()
+
+	server, serverSocketPath := runFullServer(t)
+	defer server.Stop()
+
+	client, conn := operations.NewOperationClient(t, serverSocketPath)
+	defer conn.Close()
+
+	testRepo, testRepoPath, cleanup := testhelper.NewTestRepo(t)
+	defer cleanup()
+
+	sourceBranch := "revert-src"
+	destinationBranch := "revert-dst"
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", destinationBranch, "master")
+	testhelper.MustRunCommand(t, nil, "git", "-C", testRepoPath, "branch", sourceBranch, "a5391128b0ef5d21df5dd23d98557f4ef12fae20")
+
+	user := &pb.User{
+		Name:  []byte("Ahmad Sherif"),
+		Email: []byte("ahmad@gitlab.com"),
+		GlId:  "user-123",
+	}
+
+	revertedCommit, err := log.GetCommit(ctxOuter, testRepo, sourceBranch, "")
+	require.NoError(t, err)
+
+	request := &pb.UserRevertRequest{
+		Repository:      testRepo,
+		User:            user,
+		Commit:          revertedCommit,
+		BranchName:      []byte(destinationBranch),
+		Message:         []byte("Reverting " + revertedCommit.Id),
+		StartBranchName: []byte(sourceBranch),
+	}
+
+	md := testhelper.GitalyServersMetadata(t, serverSocketPath)
+	ctx := metadata.NewOutgoingContext(ctxOuter, md)
+
+	response, err := client.UserRevert(ctx, request)
+	require.NoError(t, err)
+	require.Equal(t, "Branch diverged", response.CommitError)
+}
diff --git a/internal/service/operations/tags_test.go b/internal/service/operations/tags_test.go
index 38bdd0822..75611a526 100644
--- a/internal/service/operations/tags_test.go
+++ b/internal/service/operations/tags_test.go
@@ -87,6 +87,7 @@ func TestSuccessfulGitHooksForUserDeleteTagRequest(t *testing.T) {
 
 			hookPath, hookOutputTempPath := WriteEnvToHook(t, testRepoPath, hookName)
 			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
 
 			ctx, cancel := testhelper.Context()
 			defer cancel()
@@ -213,6 +214,7 @@ func TestSuccessfulGitHooksForUserCreateTagRequest(t *testing.T) {
 
 			hookPath, hookOutputTempPath := WriteEnvToHook(t, testRepoPath, hookName)
 			defer os.Remove(hookPath)
+			defer os.Remove(hookOutputTempPath)
 
 			ctx, cancel := testhelper.Context()
 			defer cancel()
diff --git a/internal/service/operations/utils.go b/internal/service/operations/utils.go
new file mode 100644
index 000000000..0818907fc
--- /dev/null
+++ b/internal/service/operations/utils.go
@@ -0,0 +1,34 @@
+package operations
+
+import (
+	"fmt"
+
+	pb "gitlab.com/gitlab-org/gitaly-proto/go"
+)
+
+type cherryPickOrRevertRequest interface {
+	GetUser() *pb.User
+	GetCommit() *pb.GitCommit
+	GetBranchName() []byte
+	GetMessage() []byte
+}
+
+func validateCherryPickOrRevertRequest(req cherryPickOrRevertRequest) error {
+	if req.GetUser() == nil {
+		return fmt.Errorf("empty User")
+	}
+
+	if req.GetCommit() == nil {
+		return fmt.Errorf("empty Commit")
+	}
+
+	if len(req.GetBranchName()) == 0 {
+		return fmt.Errorf("empty BranchName")
+	}
+
+	if len(req.GetMessage()) == 0 {
+		return fmt.Errorf("empty Message")
+	}
+
+	return nil
+}
diff --git a/internal/service/repository/fsck.go b/internal/service/repository/fsck.go
new file mode 100644
index 000000000..c31a963ec
--- /dev/null
+++ b/internal/service/repository/fsck.go
@@ -0,0 +1,13 @@
+package repository
+
+import (
+	"gitlab.com/gitlab-org/gitaly/internal/helper"
+
+	pb "gitlab.com/gitlab-org/gitaly-proto/go"
+
+	"golang.org/x/net/context"
+)
+
+func (s *server) Fsck(ctx context.Context, req *pb.FsckRequest) (*pb.FsckResponse, error) {
+	return nil, helper.Unimplemented
+}
diff --git a/internal/service/repository/write_ref.go b/internal/service/repository/write_ref.go
new file mode 100644
index 000000000..2369499fe
--- /dev/null
+++ b/internal/service/repository/write_ref.go
@@ -0,0 +1,13 @@
+package repository
+
+import (
+	"gitlab.com/gitlab-org/gitaly/internal/helper"
+
+	pb "gitlab.com/gitlab-org/gitaly-proto/go"
+
+	"golang.org/x/net/context"
+)
+
+func (s *server) WriteRef(ctx context.Context, req *pb.WriteRefRequest) (*pb.WriteRefResponse, error) {
+	return nil, helper.Unimplemented
+}
diff --git a/ruby/Gemfile b/ruby/Gemfile
index 0ce42d5b9..2aaf872d1 100644
--- a/ruby/Gemfile
+++ b/ruby/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'github-linguist', '~> 4.7.0', require: 'linguist'
-gem 'gitaly-proto', '~> 0.58.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.59.0', require: 'gitaly'
 gem 'activesupport'
 gem 'gollum-lib', '~> 4.2', require: false
 gem 'gollum-rugged_adapter', '~> 0.4.4', require: false
diff --git a/ruby/Gemfile.lock b/ruby/Gemfile.lock
index 6849257b6..f4e4ab108 100644
--- a/ruby/Gemfile.lock
+++ b/ruby/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
       multipart-post (>= 1.2, < 3)
     gemojione (3.3.0)
       json
-    gitaly-proto (0.58.0)
+    gitaly-proto (0.59.0)
       google-protobuf (~> 3.1)
       grpc (~> 1.0)
     github-linguist (4.7.6)
@@ -119,7 +119,7 @@ PLATFORMS
 
 DEPENDENCIES
   activesupport
-  gitaly-proto (~> 0.58.0)
+  gitaly-proto (~> 0.59.0)
   github-linguist (~> 4.7.0)
   gitlab-styles (~> 2.0.0)
   gollum-lib (~> 4.2)
diff --git a/ruby/lib/gitaly_server/operations_service.rb b/ruby/lib/gitaly_server/operations_service.rb
index e1db64ce1..3314b5ae3 100644
--- a/ruby/lib/gitaly_server/operations_service.rb
+++ b/ruby/lib/gitaly_server/operations_service.rb
@@ -178,6 +178,35 @@ module GitalyServer
       end
     end
 
+    def user_revert(request, call)
+      bridge_exceptions do
+        begin
+          repo = Gitlab::Git::Repository.from_gitaly(request.repository, call)
+          user = Gitlab::Git::User.from_gitaly(request.user)
+          commit = Gitlab::Git::Commit.new(repo, request.commit)
+          start_repository = Gitlab::Git::GitalyRemoteRepository.new(request.start_repository || request.repository, call)
+
+          result = repo.revert(
+            user: user,
+            commit: commit,
+            branch_name: request.branch_name,
+            message: request.message.dup,
+            start_branch_name: request.start_branch_name.presence,
+            start_repository: start_repository
+          )
+
+          branch_update = branch_update_result(result)
+          Gitaly::UserRevertResponse.new(branch_update: branch_update)
+        rescue Gitlab::Git::Repository::CreateTreeError => e
+          Gitaly::UserRevertResponse.new(create_tree_error: e.message)
+        rescue Gitlab::Git::CommitError => e
+          Gitaly::UserRevertResponse.new(commit_error: e.message)
+        rescue Gitlab::Git::HooksService::PreReceiveError => e
+          Gitaly::UserRevertResponse.new(pre_receive_error: e.message)
+        end
+      end
+    end
+
     private
 
     def branch_update_result(gitlab_update_result)
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
index a60476bfe..cb6b534ab 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
@@ -1 +1 @@
-0.58.0
+0.59.0
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/blob.pb.go b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/blob.pb.go
index fac146cbc..826846f79 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/blob.pb.go
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/blob.pb.go
@@ -93,6 +93,8 @@ It has these top-level messages:
 	UserFFBranchResponse
 	UserCherryPickRequest
 	UserCherryPickResponse
+	UserRevertRequest
+	UserRevertResponse
 	FindDefaultBranchNameRequest
 	FindDefaultBranchNameResponse
 	FindAllBranchNamesRequest
@@ -145,6 +147,10 @@ It has these top-level messages:
 	ChangeStorageResponse
 	FetchSourceBranchRequest
 	FetchSourceBranchResponse
+	FsckRequest
+	FsckResponse
+	WriteRefRequest
+	WriteRefResponse
 	Repository
 	GitCommit
 	CommitAuthor
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/operations.pb.go b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/operations.pb.go
index 994aea8b8..978cb9019 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/operations.pb.go
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/operations.pb.go
@@ -549,6 +549,110 @@ func (m *UserCherryPickResponse) GetPreReceiveError() string {
 	return ""
 }
 
+type UserRevertRequest struct {
+	Repository      *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
+	User            *User       `protobuf:"bytes,2,opt,name=user" json:"user,omitempty"`
+	Commit          *GitCommit  `protobuf:"bytes,3,opt,name=commit" json:"commit,omitempty"`
+	BranchName      []byte      `protobuf:"bytes,4,opt,name=branch_name,json=branchName,proto3" json:"branch_name,omitempty"`
+	Message         []byte      `protobuf:"bytes,5,opt,name=message,proto3" json:"message,omitempty"`
+	StartBranchName []byte      `protobuf:"bytes,6,opt,name=start_branch_name,json=startBranchName,proto3" json:"start_branch_name,omitempty"`
+	StartRepository *Repository `protobuf:"bytes,7,opt,name=start_repository,json=startRepository" json:"start_repository,omitempty"`
+}
+
+func (m *UserRevertRequest) Reset()                    { *m = UserRevertRequest{} }
+func (m *UserRevertRequest) String() string            { return proto.CompactTextString(m) }
+func (*UserRevertRequest) ProtoMessage()               {}
+func (*UserRevertRequest) Descriptor() ([]byte, []int) { return fileDescriptor6, []int{15} }
+
+func (m *UserRevertRequest) GetRepository() *Repository {
+	if m != nil {
+		return m.Repository
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetUser() *User {
+	if m != nil {
+		return m.User
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetCommit() *GitCommit {
+	if m != nil {
+		return m.Commit
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetBranchName() []byte {
+	if m != nil {
+		return m.BranchName
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetStartBranchName() []byte {
+	if m != nil {
+		return m.StartBranchName
+	}
+	return nil
+}
+
+func (m *UserRevertRequest) GetStartRepository() *Repository {
+	if m != nil {
+		return m.StartRepository
+	}
+	return nil
+}
+
+type UserRevertResponse struct {
+	BranchUpdate    *OperationBranchUpdate `protobuf:"bytes,1,opt,name=branch_update,json=branchUpdate" json:"branch_update,omitempty"`
+	CreateTreeError string                 `protobuf:"bytes,2,opt,name=create_tree_error,json=createTreeError" json:"create_tree_error,omitempty"`
+	CommitError     string                 `protobuf:"bytes,3,opt,name=commit_error,json=commitError" json:"commit_error,omitempty"`
+	PreReceiveError string                 `protobuf:"bytes,4,opt,name=pre_receive_error,json=preReceiveError" json:"pre_receive_error,omitempty"`
+}
+
+func (m *UserRevertResponse) Reset()                    { *m = UserRevertResponse{} }
+func (m *UserRevertResponse) String() string            { return proto.CompactTextString(m) }
+func (*UserRevertResponse) ProtoMessage()               {}
+func (*UserRevertResponse) Descriptor() ([]byte, []int) { return fileDescriptor6, []int{16} }
+
+func (m *UserRevertResponse) GetBranchUpdate() *OperationBranchUpdate {
+	if m != nil {
+		return m.BranchUpdate
+	}
+	return nil
+}
+
+func (m *UserRevertResponse) GetCreateTreeError() string {
+	if m != nil {
+		return m.CreateTreeError
+	}
+	return ""
+}
+
+func (m *UserRevertResponse) GetCommitError() string {
+	if m != nil {
+		return m.CommitError
+	}
+	return ""
+}
+
+func (m *UserRevertResponse) GetPreReceiveError() string {
+	if m != nil {
+		return m.PreReceiveError
+	}
+	return ""
+}
+
 func init() {
 	proto.RegisterType((*UserCreateBranchRequest)(nil), "gitaly.UserCreateBranchRequest")
 	proto.RegisterType((*UserCreateBranchResponse)(nil), "gitaly.UserCreateBranchResponse")
@@ -565,6 +669,8 @@ func init() {
 	proto.RegisterType((*UserFFBranchResponse)(nil), "gitaly.UserFFBranchResponse")
 	proto.RegisterType((*UserCherryPickRequest)(nil), "gitaly.UserCherryPickRequest")
 	proto.RegisterType((*UserCherryPickResponse)(nil), "gitaly.UserCherryPickResponse")
+	proto.RegisterType((*UserRevertRequest)(nil), "gitaly.UserRevertRequest")
+	proto.RegisterType((*UserRevertResponse)(nil), "gitaly.UserRevertResponse")
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -585,6 +691,7 @@ type OperationServiceClient interface {
 	UserMergeBranch(ctx context.Context, opts ...grpc.CallOption) (OperationService_UserMergeBranchClient, error)
 	UserFFBranch(ctx context.Context, in *UserFFBranchRequest, opts ...grpc.CallOption) (*UserFFBranchResponse, error)
 	UserCherryPick(ctx context.Context, in *UserCherryPickRequest, opts ...grpc.CallOption) (*UserCherryPickResponse, error)
+	UserRevert(ctx context.Context, in *UserRevertRequest, opts ...grpc.CallOption) (*UserRevertResponse, error)
 }
 
 type operationServiceClient struct {
@@ -680,6 +787,15 @@ func (c *operationServiceClient) UserCherryPick(ctx context.Context, in *UserChe
 	return out, nil
 }
 
+func (c *operationServiceClient) UserRevert(ctx context.Context, in *UserRevertRequest, opts ...grpc.CallOption) (*UserRevertResponse, error) {
+	out := new(UserRevertResponse)
+	err := grpc.Invoke(ctx, "/gitaly.OperationService/UserRevert", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for OperationService service
 
 type OperationServiceServer interface {
@@ -690,6 +806,7 @@ type OperationServiceServer interface {
 	UserMergeBranch(OperationService_UserMergeBranchServer) error
 	UserFFBranch(context.Context, *UserFFBranchRequest) (*UserFFBranchResponse, error)
 	UserCherryPick(context.Context, *UserCherryPickRequest) (*UserCherryPickResponse, error)
+	UserRevert(context.Context, *UserRevertRequest) (*UserRevertResponse, error)
 }
 
 func RegisterOperationServiceServer(s *grpc.Server, srv OperationServiceServer) {
@@ -830,6 +947,24 @@ func _OperationService_UserCherryPick_Handler(srv interface{}, ctx context.Conte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _OperationService_UserRevert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(UserRevertRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(OperationServiceServer).UserRevert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/gitaly.OperationService/UserRevert",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(OperationServiceServer).UserRevert(ctx, req.(*UserRevertRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _OperationService_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "gitaly.OperationService",
 	HandlerType: (*OperationServiceServer)(nil),
@@ -858,6 +993,10 @@ var _OperationService_serviceDesc = grpc.ServiceDesc{
 			MethodName: "UserCherryPick",
 			Handler:    _OperationService_UserCherryPick_Handler,
 		},
+		{
+			MethodName: "UserRevert",
+			Handler:    _OperationService_UserRevert_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
@@ -873,57 +1012,60 @@ var _OperationService_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("operations.proto", fileDescriptor6) }
 
 var fileDescriptor6 = []byte{
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+	// 867 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xec, 0x57, 0xcd, 0x72, 0xd3, 0x48,
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+	0x0e, 0x00, 0x00,
 }
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/repository-service.pb.go b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/repository-service.pb.go
index 2680c2f5f..14916546e 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/repository-service.pb.go
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/repository-service.pb.go
@@ -533,6 +533,86 @@ func (m *FetchSourceBranchResponse) GetResult() bool {
 	return false
 }
 
+type FsckRequest struct {
+	Repository *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
+}
+
+func (m *FsckRequest) Reset()                    { *m = FsckRequest{} }
+func (m *FsckRequest) String() string            { return proto.CompactTextString(m) }
+func (*FsckRequest) ProtoMessage()               {}
+func (*FsckRequest) Descriptor() ([]byte, []int) { return fileDescriptor8, []int{26} }
+
+func (m *FsckRequest) GetRepository() *Repository {
+	if m != nil {
+		return m.Repository
+	}
+	return nil
+}
+
+type FsckResponse struct {
+	Error []byte `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (m *FsckResponse) Reset()                    { *m = FsckResponse{} }
+func (m *FsckResponse) String() string            { return proto.CompactTextString(m) }
+func (*FsckResponse) ProtoMessage()               {}
+func (*FsckResponse) Descriptor() ([]byte, []int) { return fileDescriptor8, []int{27} }
+
+func (m *FsckResponse) GetError() []byte {
+	if m != nil {
+		return m.Error
+	}
+	return nil
+}
+
+type WriteRefRequest struct {
+	Repository *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
+	Ref        []byte      `protobuf:"bytes,2,opt,name=ref,proto3" json:"ref,omitempty"`
+	Revision   []byte      `protobuf:"bytes,3,opt,name=revision,proto3" json:"revision,omitempty"`
+}
+
+func (m *WriteRefRequest) Reset()                    { *m = WriteRefRequest{} }
+func (m *WriteRefRequest) String() string            { return proto.CompactTextString(m) }
+func (*WriteRefRequest) ProtoMessage()               {}
+func (*WriteRefRequest) Descriptor() ([]byte, []int) { return fileDescriptor8, []int{28} }
+
+func (m *WriteRefRequest) GetRepository() *Repository {
+	if m != nil {
+		return m.Repository
+	}
+	return nil
+}
+
+func (m *WriteRefRequest) GetRef() []byte {
+	if m != nil {
+		return m.Ref
+	}
+	return nil
+}
+
+func (m *WriteRefRequest) GetRevision() []byte {
+	if m != nil {
+		return m.Revision
+	}
+	return nil
+}
+
+type WriteRefResponse struct {
+	Error []byte `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (m *WriteRefResponse) Reset()                    { *m = WriteRefResponse{} }
+func (m *WriteRefResponse) String() string            { return proto.CompactTextString(m) }
+func (*WriteRefResponse) ProtoMessage()               {}
+func (*WriteRefResponse) Descriptor() ([]byte, []int) { return fileDescriptor8, []int{29} }
+
+func (m *WriteRefResponse) GetError() []byte {
+	if m != nil {
+		return m.Error
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*RepositoryExistsRequest)(nil), "gitaly.RepositoryExistsRequest")
 	proto.RegisterType((*RepositoryExistsResponse)(nil), "gitaly.RepositoryExistsResponse")
@@ -560,6 +640,10 @@ func init() {
 	proto.RegisterType((*ChangeStorageResponse)(nil), "gitaly.ChangeStorageResponse")
 	proto.RegisterType((*FetchSourceBranchRequest)(nil), "gitaly.FetchSourceBranchRequest")
 	proto.RegisterType((*FetchSourceBranchResponse)(nil), "gitaly.FetchSourceBranchResponse")
+	proto.RegisterType((*FsckRequest)(nil), "gitaly.FsckRequest")
+	proto.RegisterType((*FsckResponse)(nil), "gitaly.FsckResponse")
+	proto.RegisterType((*WriteRefRequest)(nil), "gitaly.WriteRefRequest")
+	proto.RegisterType((*WriteRefResponse)(nil), "gitaly.WriteRefResponse")
 	proto.RegisterEnum("gitaly.GetArchiveRequest_Format", GetArchiveRequest_Format_name, GetArchiveRequest_Format_value)
 }
 
@@ -587,6 +671,8 @@ type RepositoryServiceClient interface {
 	HasLocalBranches(ctx context.Context, in *HasLocalBranchesRequest, opts ...grpc.CallOption) (*HasLocalBranchesResponse, error)
 	ChangeStorage(ctx context.Context, in *ChangeStorageRequest, opts ...grpc.CallOption) (*ChangeStorageResponse, error)
 	FetchSourceBranch(ctx context.Context, in *FetchSourceBranchRequest, opts ...grpc.CallOption) (*FetchSourceBranchResponse, error)
+	Fsck(ctx context.Context, in *FsckRequest, opts ...grpc.CallOption) (*FsckResponse, error)
+	WriteRef(ctx context.Context, in *WriteRefRequest, opts ...grpc.CallOption) (*WriteRefResponse, error)
 }
 
 type repositoryServiceClient struct {
@@ -737,6 +823,24 @@ func (c *repositoryServiceClient) FetchSourceBranch(ctx context.Context, in *Fet
 	return out, nil
 }
 
+func (c *repositoryServiceClient) Fsck(ctx context.Context, in *FsckRequest, opts ...grpc.CallOption) (*FsckResponse, error) {
+	out := new(FsckResponse)
+	err := grpc.Invoke(ctx, "/gitaly.RepositoryService/Fsck", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *repositoryServiceClient) WriteRef(ctx context.Context, in *WriteRefRequest, opts ...grpc.CallOption) (*WriteRefResponse, error) {
+	out := new(WriteRefResponse)
+	err := grpc.Invoke(ctx, "/gitaly.RepositoryService/WriteRef", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for RepositoryService service
 
 type RepositoryServiceServer interface {
@@ -753,6 +857,8 @@ type RepositoryServiceServer interface {
 	HasLocalBranches(context.Context, *HasLocalBranchesRequest) (*HasLocalBranchesResponse, error)
 	ChangeStorage(context.Context, *ChangeStorageRequest) (*ChangeStorageResponse, error)
 	FetchSourceBranch(context.Context, *FetchSourceBranchRequest) (*FetchSourceBranchResponse, error)
+	Fsck(context.Context, *FsckRequest) (*FsckResponse, error)
+	WriteRef(context.Context, *WriteRefRequest) (*WriteRefResponse, error)
 }
 
 func RegisterRepositoryServiceServer(s *grpc.Server, srv RepositoryServiceServer) {
@@ -996,6 +1102,42 @@ func _RepositoryService_FetchSourceBranch_Handler(srv interface{}, ctx context.C
 	return interceptor(ctx, in, info, handler)
 }
 
+func _RepositoryService_Fsck_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(FsckRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RepositoryServiceServer).Fsck(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/gitaly.RepositoryService/Fsck",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RepositoryServiceServer).Fsck(ctx, req.(*FsckRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _RepositoryService_WriteRef_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(WriteRefRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RepositoryServiceServer).WriteRef(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/gitaly.RepositoryService/WriteRef",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RepositoryServiceServer).WriteRef(ctx, req.(*WriteRefRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _RepositoryService_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "gitaly.RepositoryService",
 	HandlerType: (*RepositoryServiceServer)(nil),
@@ -1048,6 +1190,14 @@ var _RepositoryService_serviceDesc = grpc.ServiceDesc{
 			MethodName: "FetchSourceBranch",
 			Handler:    _RepositoryService_FetchSourceBranch_Handler,
 		},
+		{
+			MethodName: "Fsck",
+			Handler:    _RepositoryService_Fsck_Handler,
+		},
+		{
+			MethodName: "WriteRef",
+			Handler:    _RepositoryService_WriteRef_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
@@ -1062,67 +1212,72 @@ var _RepositoryService_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("repository-service.proto", fileDescriptor8) }
 
 var fileDescriptor8 = []byte{
-	// 980 bytes of a gzipped FileDescriptorProto
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 }
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 049e51684..bda79b5ae 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -201,12 +201,12 @@
 			"revisionTime": "2017-01-30T11:31:45Z"
 		},
 		{
-			"checksumSHA1": "bGfAlbcqTr3IdViAogIPtRb8ZS4=",
+			"checksumSHA1": "wqiEiQvCNmzeYfjBtfSh0tOYoYs=",
 			"path": "gitlab.com/gitlab-org/gitaly-proto/go",
-			"revision": "b1412591107369492d738b39493667548ce8c0f0",
-			"revisionTime": "2017-11-30T10:17:56Z",
-			"version": "v0.58.0",
-			"versionExact": "v0.58.0"
+			"revision": "fa425603222fbb85574be486460e88c84f49b77d",
+			"revisionTime": "2017-12-04T16:31:46Z",
+			"version": "v0.59.0",
+			"versionExact": "v0.59.0"
 		},
 		{
 			"checksumSHA1": "nqWNlnMmVpt628zzvyo6Yv2CX5Q=",