Merge branch 'ps-git-protocol-envvar' into 'master'

commands: pass through GIT_PROTOCOL envvar provided by clients

Closes #273

See merge request gitlab-org/gitlab-shell!364

internal/command/commandargs/shell.go

@@ -15,6 +15,8 @@ const (
 	ReceivePack      CommandType = "git-receive-pack"
 	UploadPack       CommandType = "git-upload-pack"
 	UploadArchive    CommandType = "git-upload-archive"
+
+	GitProtocolEnv = "GIT_PROTOCOL"
 )
 
 var (

internal/command/receivepack/gitalycall.go

@@ -2,6 +2,7 @@ package receivepack
 
 import (
 	"context"
+	"os"
 
 	"google.golang.org/grpc"
 
@@ -26,7 +27,7 @@ func (c *Command) performGitalyCall(response *accessverifier.Response) error {
 		GlId:             response.UserId,
 		GlRepository:     response.Repo,
 		GlUsername:       response.Username,
-		GitProtocol:      response.GitProtocol,
+		GitProtocol:      os.Getenv(commandargs.GitProtocolEnv),
 		GitConfigOptions: response.GitConfigOptions,
 	}
 

internal/command/uploadpack/gitalycall.go

@@ -2,6 +2,7 @@ package uploadpack
 
 import (
 	"context"
+	"os"
 
 	"google.golang.org/grpc"
 
@@ -23,7 +24,7 @@ func (c *Command) performGitalyCall(response *accessverifier.Response) error {
 
 	request := &pb.SSHUploadPackRequest{
 		Repository:       &response.Gitaly.Repo,
-		GitProtocol:      response.GitProtocol,
+		GitProtocol:      os.Getenv(commandargs.GitProtocolEnv),
 		GitConfigOptions: response.GitConfigOptions,
 	}