Merge branch 'feature/implement-selective-ref-deletion' into 'master'

Add support for Refs field in DeleteRefs RPC

Closes #968

See merge request gitlab-org/gitaly!565

11 files changed, 360 insertions, 237 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ffb65999..bb8ea020c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 UNRELEASED
 
+- Add support for Refs field in DeleteRefs RPC
+  https://gitlab.com/gitlab-org/gitaly/merge_requests/565
 - Wait between ruby worker removal from pool and graceful shutdown
   https://gitlab.com/gitlab-org/gitaly/merge_requests/567
 - Register the ServerService
@@ -10,7 +12,7 @@ UNRELEASED
   https://gitlab.com/gitlab-org/gitaly/merge_requests/571
 - Vendor gitlab_git at 4376be84ce18cde22febc50
   https://gitlab.com/gitlab-org/gitaly/merge_requests/570
-  
+
 v0.75.0
 
 - Implement WikiGetFormattedData RPC
diff --git a/internal/service/ref/delete_refs.go b/internal/service/ref/delete_refs.go
index 6482e1220..d9e88a55c 100644
--- a/internal/service/ref/delete_refs.go
+++ b/internal/service/ref/delete_refs.go
@@ -1,6 +1,8 @@
 package ref
 
 import (
+	"fmt"
+
 	pb "gitlab.com/gitlab-org/gitaly-proto/go"
 	"gitlab.com/gitlab-org/gitaly/internal/rubyserver"
 	"golang.org/x/net/context"
@@ -9,14 +11,8 @@ import (
 )
 
 func (s *server) DeleteRefs(ctx context.Context, in *pb.DeleteRefsRequest) (*pb.DeleteRefsResponse, error) {
-	if len(in.ExceptWithPrefix) == 0 { // You can't delete all refs
-		return nil, status.Errorf(codes.InvalidArgument, "DeleteRefs: empty ExceptWithPrefix")
-	}
-
-	for _, prefix := range in.ExceptWithPrefix {
-		if len(prefix) == 0 {
-			return nil, status.Errorf(codes.InvalidArgument, "DeleteRefs: empty prefix for exclussion")
-		}
+	if err := validateDeleteRefRequest(in); err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "DeleteRefs: %v", err)
 	}
 
 	client, err := s.RefServiceClient(ctx)
@@ -31,3 +27,27 @@ func (s *server) DeleteRefs(ctx context.Context, in *pb.DeleteRefsRequest) (*pb.
 
 	return client.DeleteRefs(clientCtx, in)
 }
+
+func validateDeleteRefRequest(req *pb.DeleteRefsRequest) error {
+	if len(req.ExceptWithPrefix) > 0 && len(req.Refs) > 0 {
+		return fmt.Errorf("ExceptWithPrefix and Refs are mutually exclusive")
+	}
+
+	if len(req.ExceptWithPrefix) == 0 && len(req.Refs) == 0 { // You can't delete all refs
+		return fmt.Errorf("empty ExceptWithPrefix and Refs")
+	}
+
+	for _, prefix := range req.ExceptWithPrefix {
+		if len(prefix) == 0 {
+			return fmt.Errorf("empty prefix for exclusion")
+		}
+	}
+
+	for _, ref := range req.Refs {
+		if len(ref) == 0 {
+			return fmt.Errorf("empty ref")
+		}
+	}
+
+	return nil
+}
diff --git a/internal/service/ref/delete_refs_test.go b/internal/service/ref/delete_refs_test.go
index 2b817a012..05c74d3ef 100644
--- a/internal/service/ref/delete_refs_test.go
+++ b/internal/service/ref/delete_refs_test.go
@@ -18,32 +18,74 @@ func TestSuccessfulDeleteRefs(t *testing.T) {
 	client, conn := newRefServiceClient(t, serverSocketPath)
 	defer conn.Close()
 
-	repo, repoPath, cleanupFn := testhelper.NewTestRepo(t)
-	defer cleanupFn()
+	testCases := []struct {
+		desc    string
+		request *pb.DeleteRefsRequest
+	}{
+		{
+			desc: "delete all except refs with certain prefixes",
+			request: &pb.DeleteRefsRequest{
+				ExceptWithPrefix: [][]byte{[]byte("refs/keep"), []byte("refs/also-keep"), []byte("refs/heads/")},
+			},
+		},
+		{
+			desc: "delete certain refs",
+			request: &pb.DeleteRefsRequest{
+				Refs: [][]byte{[]byte("refs/delete/a"), []byte("refs/also-delete/b")},
+			},
+		},
+	}
 
-	testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/delete/a", "b83d6e391c22777fca1ed3012fce84f633d7fed0")
-	testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/also-delete/b", "1b12f15a11fc6e62177bef08f47bc7b5ce50b141")
-	testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/keep/c", "498214de67004b1da3d820901307bed2a68a8ef6")
-	testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/also-keep/d", "b83d6e391c22777fca1ed3012fce84f633d7fed0")
+	for _, testCase := range testCases {
+		t.Run(testCase.desc, func(t *testing.T) {
+			repo, repoPath, cleanupFn := testhelper.NewTestRepo(t)
+			defer cleanupFn()
 
-	rpcRequest := &pb.DeleteRefsRequest{
-		Repository:       repo,
-		ExceptWithPrefix: [][]byte{[]byte("refs/keep"), []byte("refs/also-keep"), []byte("refs/heads/")},
+			testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/delete/a", "b83d6e391c22777fca1ed3012fce84f633d7fed0")
+			testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/also-delete/b", "1b12f15a11fc6e62177bef08f47bc7b5ce50b141")
+			testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/keep/c", "498214de67004b1da3d820901307bed2a68a8ef6")
+			testhelper.MustRunCommand(t, nil, "git", "-C", repoPath, "update-ref", "refs/also-keep/d", "b83d6e391c22777fca1ed3012fce84f633d7fed0")
+
+			ctx, cancel := testhelper.Context()
+			defer cancel()
+
+			testCase.request.Repository = repo
+			_, err := client.DeleteRefs(ctx, testCase.request)
+			require.NoError(t, err)
+
+			refs := testhelper.GetRepositoryRefs(t, repoPath)
+
+			require.NotContains(t, refs, "refs/delete/a")
+			require.NotContains(t, refs, "refs/also-delete/b")
+			require.Contains(t, refs, "refs/keep/c")
+			require.Contains(t, refs, "refs/also-keep/d")
+			require.Contains(t, refs, "refs/heads/master")
+		})
 	}
+}
+
+func TestFailedDeleteRefsRequestDueToGitError(t *testing.T) {
+	server, serverSocketPath := runRefServiceServer(t)
+	defer server.Stop()
+
+	client, conn := newRefServiceClient(t, serverSocketPath)
+	defer conn.Close()
 
 	ctx, cancel := testhelper.Context()
 	defer cancel()
 
-	_, err := client.DeleteRefs(ctx, rpcRequest)
-	require.NoError(t, err)
+	repo, _, cleanupFn := testhelper.NewTestRepo(t)
+	defer cleanupFn()
 
-	refs := testhelper.GetRepositoryRefs(t, repoPath)
+	request := &pb.DeleteRefsRequest{
+		Repository: repo,
+		Refs:       [][]byte{[]byte(`refs\tails\invalid-ref-format`)},
+	}
+
+	response, err := client.DeleteRefs(ctx, request)
+	require.NoError(t, err)
 
-	require.NotContains(t, refs, "refs/delete/a")
-	require.NotContains(t, refs, "refs/also-delete/b")
-	require.Contains(t, refs, "refs/keep/c")
-	require.Contains(t, refs, "refs/also-keep/d")
-	require.Contains(t, refs, "refs/heads/master")
+	require.Contains(t, response.GitError, "Could not delete refs")
 }
 
 func TestFailedDeleteRefsDueToValidation(t *testing.T) {
@@ -57,34 +99,59 @@ func TestFailedDeleteRefsDueToValidation(t *testing.T) {
 	defer cleanupFn()
 
 	testCases := []struct {
-		desc     string
-		repo     *pb.Repository
-		prefixes [][]byte
-		code     codes.Code
+		desc    string
+		request *pb.DeleteRefsRequest
+		// repo     *pb.Repository
+		// prefixes [][]byte
+		code codes.Code
 	}{
 		{
-			desc:     "Invalid repository",
-			repo:     &pb.Repository{StorageName: "fake", RelativePath: "path"},
-			prefixes: [][]byte{[]byte("exclude-this")},
-			code:     codes.InvalidArgument,
+			desc: "Invalid repository",
+			request: &pb.DeleteRefsRequest{
+				Repository:       &pb.Repository{StorageName: "fake", RelativePath: "path"},
+				ExceptWithPrefix: [][]byte{[]byte("exclude-this")},
+			},
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "Repository is nil",
+			request: &pb.DeleteRefsRequest{
+				Repository:       nil,
+				ExceptWithPrefix: [][]byte{[]byte("exclude-this")},
+			},
+			code: codes.InvalidArgument,
+		},
+		{
+			desc: "No prefixes nor refs",
+			request: &pb.DeleteRefsRequest{
+				Repository: testRepo,
+			},
+			code: codes.InvalidArgument,
 		},
 		{
-			desc:     "Repository is nil",
-			repo:     nil,
-			prefixes: [][]byte{[]byte("exclude-this")},
-			code:     codes.InvalidArgument,
+			desc: "prefixes with refs",
+			request: &pb.DeleteRefsRequest{
+				Repository:       testRepo,
+				ExceptWithPrefix: [][]byte{[]byte("exclude-this")},
+				Refs:             [][]byte{[]byte("delete-this")},
+			},
+			code: codes.InvalidArgument,
 		},
 		{
-			desc:     "No prefixes",
-			repo:     testRepo,
-			prefixes: [][]byte{},
-			code:     codes.InvalidArgument,
+			desc: "Empty prefix",
+			request: &pb.DeleteRefsRequest{
+				Repository:       testRepo,
+				ExceptWithPrefix: [][]byte{[]byte("exclude-this"), []byte{}},
+			},
+			code: codes.InvalidArgument,
 		},
 		{
-			desc:     "Empty prefix",
-			repo:     testRepo,
-			prefixes: [][]byte{[]byte("exclude-this"), []byte{}},
-			code:     codes.InvalidArgument,
+			desc: "Empty ref",
+			request: &pb.DeleteRefsRequest{
+				Repository: testRepo,
+				Refs:       [][]byte{[]byte("delete-this"), []byte{}},
+			},
+			code: codes.InvalidArgument,
 		},
 	}
 
@@ -93,11 +160,7 @@ func TestFailedDeleteRefsDueToValidation(t *testing.T) {
 			ctx, cancel := testhelper.Context()
 			defer cancel()
 
-			rpcRequest := &pb.DeleteRefsRequest{
-				Repository:       tc.repo,
-				ExceptWithPrefix: tc.prefixes,
-			}
-			_, err := client.DeleteRefs(ctx, rpcRequest)
+			_, err := client.DeleteRefs(ctx, tc.request)
 			testhelper.AssertGrpcError(t, err, tc.code, "")
 		})
 	}
diff --git a/internal/testhelper/testhelper.go b/internal/testhelper/testhelper.go
index 0c5eef0f5..52cea227c 100644
--- a/internal/testhelper/testhelper.go
+++ b/internal/testhelper/testhelper.go
@@ -331,7 +331,9 @@ func Context() (context.Context, func()) {
 }
 
 func createRepo(t *testing.T, storagePath string) (repo *pb.Repository, repoPath, relativePath string) {
-	repoPath, err := ioutil.TempDir(storagePath, t.Name())
+	normalizedPrefix := strings.Replace(t.Name(), "/", "-", -1) //TempDir doesn't like a prefix containing slashes
+
+	repoPath, err := ioutil.TempDir(storagePath, normalizedPrefix)
 	require.NoError(t, err)
 	relativePath, err = filepath.Rel(storagePath, repoPath)
 	require.NoError(t, err)
diff --git a/ruby/Gemfile b/ruby/Gemfile
index 85665bf55..ef45a1b16 100644
--- a/ruby/Gemfile
+++ b/ruby/Gemfile
@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gem 'github-linguist', '~> 4.7.0', require: 'linguist'
 gem 'gitlab-markup', '~> 1.6.2'
-gem 'gitaly-proto', '~> 0.82.0', require: 'gitaly'
+gem 'gitaly-proto', '~> 0.83.0', require: 'gitaly'
 gem 'activesupport'
 gem 'rdoc', '~> 4.2'
 gem 'gollum-lib', '~> 4.2', require: false
diff --git a/ruby/Gemfile.lock b/ruby/Gemfile.lock
index 392f68bfa..c6d57142d 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 (0.82.0)
+    gitaly-proto (0.83.0)
       google-protobuf (~> 3.1)
       grpc (~> 1.0)
     github-linguist (4.7.6)
@@ -137,7 +137,7 @@ PLATFORMS
 
 DEPENDENCIES
   activesupport
-  gitaly-proto (~> 0.82.0)
+  gitaly-proto (~> 0.83.0)
   github-linguist (~> 4.7.0)
   gitlab-markup (~> 1.6.2)
   gitlab-styles (~> 2.0.0)
diff --git a/ruby/lib/gitaly_server/ref_service.rb b/ruby/lib/gitaly_server/ref_service.rb
index 799c55664..7e2f05a43 100644
--- a/ruby/lib/gitaly_server/ref_service.rb
+++ b/ruby/lib/gitaly_server/ref_service.rb
@@ -96,9 +96,17 @@ module GitalyServer
       bridge_exceptions do
         repo = Gitlab::Git::Repository.from_gitaly(request.repository, call)
 
-        repo.delete_all_refs_except(request.except_with_prefix)
+        begin
+          if request.refs.any?
+            repo.delete_refs(*request.refs)
+          else
+            repo.delete_all_refs_except(request.except_with_prefix)
+          end
 
-        Gitaly::DeleteRefsResponse.new
+          Gitaly::DeleteRefsResponse.new
+        rescue Gitlab::Git::Repository::GitError => e
+          Gitaly::DeleteRefsResponse.new(git_error: e.message)
+        end
       end
     end
   end
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
index 92fc430ae..83dcd12cb 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/VERSION
@@ -1 +1 @@
-0.82.0
+0.83.0
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 05b691d1e..558ad8e08 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
@@ -356,7 +356,8 @@ type UserMergeBranchResponse struct {
 	CommitId string `protobuf:"bytes,1,opt,name=commit_id,json=commitId" json:"commit_id,omitempty"`
 	// Second message
 	// If set, the merge has been applied to the branch.
-	BranchUpdate *OperationBranchUpdate `protobuf:"bytes,3,opt,name=branch_update,json=branchUpdate" json:"branch_update,omitempty"`
+	BranchUpdate    *OperationBranchUpdate `protobuf:"bytes,3,opt,name=branch_update,json=branchUpdate" json:"branch_update,omitempty"`
+	PreReceiveError string                 `protobuf:"bytes,4,opt,name=pre_receive_error,json=preReceiveError" json:"pre_receive_error,omitempty"`
 }
 
 func (m *UserMergeBranchResponse) Reset()                    { *m = UserMergeBranchResponse{} }
@@ -378,6 +379,13 @@ func (m *UserMergeBranchResponse) GetBranchUpdate() *OperationBranchUpdate {
 	return nil
 }
 
+func (m *UserMergeBranchResponse) GetPreReceiveError() string {
+	if m != nil {
+		return m.PreReceiveError
+	}
+	return ""
+}
+
 type OperationBranchUpdate struct {
 	// If this string is non-empty the branch has been updated.
 	CommitId string `protobuf:"bytes,1,opt,name=commit_id,json=commitId" json:"commit_id,omitempty"`
@@ -1761,96 +1769,97 @@ var _OperationService_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("operations.proto", fileDescriptor7) }
 
 var fileDescriptor7 = []byte{
-	// 1456 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xec, 0x58, 0x4f, 0x6f, 0x1b, 0x45,
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+	0x17, 0x00, 0x00,
 }
diff --git a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/ref.pb.go b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/ref.pb.go
index e28134b5f..cf8bec0a1 100644
--- a/vendor/gitlab.com/gitlab-org/gitaly-proto/go/ref.pb.go
+++ b/vendor/gitlab.com/gitlab-org/gitaly-proto/go/ref.pb.go
@@ -621,8 +621,10 @@ func (m *FindBranchResponse) GetBranch() *Branch {
 }
 
 type DeleteRefsRequest struct {
-	Repository       *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
-	ExceptWithPrefix [][]byte    `protobuf:"bytes,2,rep,name=except_with_prefix,json=exceptWithPrefix,proto3" json:"except_with_prefix,omitempty"`
+	Repository *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
+	// The following two fields are mutually exclusive
+	ExceptWithPrefix [][]byte `protobuf:"bytes,2,rep,name=except_with_prefix,json=exceptWithPrefix,proto3" json:"except_with_prefix,omitempty"`
+	Refs             [][]byte `protobuf:"bytes,3,rep,name=refs,proto3" json:"refs,omitempty"`
 }
 
 func (m *DeleteRefsRequest) Reset()                    { *m = DeleteRefsRequest{} }
@@ -644,7 +646,15 @@ func (m *DeleteRefsRequest) GetExceptWithPrefix() [][]byte {
 	return nil
 }
 
+func (m *DeleteRefsRequest) GetRefs() [][]byte {
+	if m != nil {
+		return m.Refs
+	}
+	return nil
+}
+
 type DeleteRefsResponse struct {
+	GitError string `protobuf:"bytes,1,opt,name=git_error,json=gitError" json:"git_error,omitempty"`
 }
 
 func (m *DeleteRefsResponse) Reset()                    { *m = DeleteRefsResponse{} }
@@ -652,6 +662,13 @@ func (m *DeleteRefsResponse) String() string            { return proto.CompactTe
 func (*DeleteRefsResponse) ProtoMessage()               {}
 func (*DeleteRefsResponse) Descriptor() ([]byte, []int) { return fileDescriptor8, []int{25} }
 
+func (m *DeleteRefsResponse) GetGitError() string {
+	if m != nil {
+		return m.GitError
+	}
+	return ""
+}
+
 type ListBranchNamesContainingCommitRequest struct {
 	Repository *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
 	CommitId   string      `protobuf:"bytes,2,opt,name=commit_id,json=commitId" json:"commit_id,omitempty"`
@@ -1498,83 +1515,85 @@ var _RefService_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("ref.proto", fileDescriptor8) }
 
 var fileDescriptor8 = []byte{
-	// 1236 bytes of a gzipped FileDescriptorProto
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 }
diff --git a/vendor/vendor.json b/vendor/vendor.json
index a405f64e3..0162aabf1 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -201,12 +201,12 @@
 			"revisionTime": "2017-12-31T12:27:32Z"
 		},
 		{
-			"checksumSHA1": "+oTuDZhG25e+8+35Tkal+/W/794=",
+			"checksumSHA1": "IJSb1CErPkBndZV3OsrrMd67Kz8=",
 			"path": "gitlab.com/gitlab-org/gitaly-proto/go",
-			"revision": "e6d1d41cf719891fbff77ea2ac5f84152a5da02b",
-			"revisionTime": "2018-01-25T16:51:00Z",
-			"version": "v0.82.0",
-			"versionExact": "v0.82.0"
+			"revision": "a9d2aa860efeb13a4b2008b4bcf867a48b5207f0",
+			"revisionTime": "2018-01-29T15:58:26Z",
+			"version": "v0.83.0",
+			"versionExact": "v0.83.0"
 		},
 		{
 			"checksumSHA1": "nqWNlnMmVpt628zzvyo6Yv2CX5Q=",