internalgitaly: WalkRepos to return last accessed timestamp

In order to make a decision on which repositories to clean up,
Praefect's repocleaner will match repository paths with what it sees in
the database. If it doesn't see a record in the database, that means
Praefect doesn't know about this repository.

However, it could be the case that a repository has just been created
and the record for it doesn't yet exist in the database.

In order for repocleaner to know, it needs the information to be
returned from Gitaly.

Add a field in the RPC response, and return the last modified date on the
refs/ dir so we can use it as a proxy for when the repository was
created.

1 files changed, 48 insertions, 27 deletions

diff --git a/proto/go/gitalypb/internal.pb.go b/proto/go/gitalypb/internal.pb.go
index b5ddcb5ef..d7b604b54 100644
--- a/proto/go/gitalypb/internal.pb.go
+++ b/proto/go/gitalypb/internal.pb.go
@@ -9,6 +9,7 @@ package gitalypb
 import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -73,6 +74,10 @@ type WalkReposResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	RelativePath string `protobuf:"bytes,1,opt,name=relative_path,json=relativePath,proto3" json:"relative_path,omitempty"`
+	// modification_time is the modification time of the repository directory.
+	// This can be used as a proxy for when the repository was last
+	// modified.
+	ModificationTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=modification_time,json=modificationTime,proto3" json:"modification_time,omitempty"`
 }
 
 func (x *WalkReposResponse) Reset() {
@@ -114,29 +119,43 @@ func (x *WalkReposResponse) GetRelativePath() string {
 	return ""
 }
 
+func (x *WalkReposResponse) GetModificationTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.ModificationTime
+	}
+	return nil
+}
+
 var File_internal_proto protoreflect.FileDescriptor
 
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 }
 
 var (
@@ -153,17 +172,19 @@ func file_internal_proto_rawDescGZIP() []byte {
 
 var file_internal_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
 var file_internal_proto_goTypes = []interface{}{
-	(*WalkReposRequest)(nil),  // 0: gitaly.WalkReposRequest
-	(*WalkReposResponse)(nil), // 1: gitaly.WalkReposResponse
+	(*WalkReposRequest)(nil),      // 0: gitaly.WalkReposRequest
+	(*WalkReposResponse)(nil),     // 1: gitaly.WalkReposResponse
+	(*timestamppb.Timestamp)(nil), // 2: google.protobuf.Timestamp
 }
 var file_internal_proto_depIdxs = []int32{
-	0, // 0: gitaly.InternalGitaly.WalkRepos:input_type -> gitaly.WalkReposRequest
-	1, // 1: gitaly.InternalGitaly.WalkRepos:output_type -> gitaly.WalkReposResponse
-	1, // [1:2] is the sub-list for method output_type
-	0, // [0:1] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	2, // 0: gitaly.WalkReposResponse.modification_time:type_name -> google.protobuf.Timestamp
+	0, // 1: gitaly.InternalGitaly.WalkRepos:input_type -> gitaly.WalkReposRequest
+	1, // 2: gitaly.InternalGitaly.WalkRepos:output_type -> gitaly.WalkReposResponse
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_internal_proto_init() }