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package main
import (
"context"
"fmt"
"log"
"os"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
gitalyauth "gitlab.com/gitlab-org/gitaly/auth"
"gitlab.com/gitlab-org/gitaly/client"
grpccorrelation "gitlab.com/gitlab-org/labkit/correlation/grpc"
"gitlab.com/gitlab-org/labkit/tracing"
grpctracing "gitlab.com/gitlab-org/labkit/tracing/grpc"
"google.golang.org/grpc"
)
type packFn func(_ context.Context, _ *grpc.ClientConn, _ string) (int32, error)
// GITALY_ADDRESS="tcp://1.2.3.4:9999" or "unix:/var/run/gitaly.sock"
// GITALY_TOKEN="foobar1234"
// GITALY_PAYLOAD="{repo...}"
// GITALY_WD="/path/to/working-directory"
// gitaly-ssh upload-pack <git-garbage-x2>
func main() {
// < 4 since git throws on 2x garbage here
if n := len(os.Args); n < 4 {
// TODO: Errors needs to be sent back some other way... pipes?
log.Fatalf("invalid number of arguments, expected at least 1, got %d", n-1)
}
command := os.Args[1]
var packer packFn
switch command {
case "upload-pack":
packer = uploadPack
case "receive-pack":
packer = receivePack
case "upload-archive":
packer = uploadArchive
default:
log.Fatalf("invalid pack command: %q", command)
}
gitalyWorkingDir := os.Getenv("GITALY_WD")
gitalyAddress := os.Getenv("GITALY_ADDRESS")
gitalyPayload := os.Getenv("GITALY_PAYLOAD")
code, err := run(packer, gitalyWorkingDir, gitalyAddress, gitalyPayload)
if err != nil {
log.Printf("%s: %v", command, err)
}
os.Exit(code)
}
func run(packer packFn, gitalyWorkingDir string, gitalyAddress string, gitalyPayload string) (int, error) {
// Configure distributed tracing
closer := tracing.Initialize(tracing.WithServiceName("gitaly-ssh"))
defer closer.Close()
ctx, finished := tracing.ExtractFromEnv(context.Background())
defer finished()
if gitalyWorkingDir != "" {
if err := os.Chdir(gitalyWorkingDir); err != nil {
return 1, fmt.Errorf("unable to chdir to %v", gitalyWorkingDir)
}
}
conn, err := getConnection(gitalyAddress)
if err != nil {
return 1, err
}
defer conn.Close()
code, err := packer(ctx, conn, gitalyPayload)
if err != nil {
return 1, err
}
return int(code), nil
}
func getConnection(url string) (*grpc.ClientConn, error) {
if url == "" {
return nil, fmt.Errorf("gitaly address can not be empty")
}
return client.Dial(url, dialOpts())
}
func dialOpts() []grpc.DialOption {
connOpts := client.DefaultDialOpts
if token := os.Getenv("GITALY_TOKEN"); token != "" {
connOpts = append(connOpts, grpc.WithPerRPCCredentials(gitalyauth.RPCCredentials(token)))
}
// Add grpc client interceptors
connOpts = append(connOpts, grpc.WithStreamInterceptor(
grpc_middleware.ChainStreamClient(
grpctracing.StreamClientTracingInterceptor(), // Tracing
grpccorrelation.StreamClientCorrelationInterceptor(), // Correlation
)),
grpc.WithUnaryInterceptor(
grpc_middleware.ChainUnaryClient(
grpctracing.UnaryClientTracingInterceptor(), // Tracing
grpccorrelation.UnaryClientCorrelationInterceptor(), // Correlation
)))
return connOpts
}
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