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package hook
import (
"errors"
"fmt"
"gitlab.com/gitlab-org/gitaly/v15/structerr"
"os/exec"
"sync"
"gitlab.com/gitlab-org/gitaly/proto/v15/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/v15/internal/gitaly/service"
"gitlab.com/gitlab-org/gitaly/v15/streamio"
)
func (s *server) PreReceiveHook(stream gitalypb.HookService_PreReceiveHookServer) error {
firstRequest, err := stream.Recv()
if err != nil {
return structerr.NewInternal("receiving first request: %w", err)
}
if err := validatePreReceiveHookRequest(firstRequest); err != nil {
return structerr.NewInvalidArgument("%w", err)
}
repository := firstRequest.GetRepository()
stdin := streamio.NewReader(func() ([]byte, error) {
req, err := stream.Recv()
return req.GetStdin(), err
})
var m sync.Mutex
stdout := streamio.NewSyncWriter(&m, func(p []byte) error {
return stream.Send(&gitalypb.PreReceiveHookResponse{Stdout: p})
})
stderr := streamio.NewSyncWriter(&m, func(p []byte) error {
return stream.Send(&gitalypb.PreReceiveHookResponse{Stderr: p})
})
if err := s.manager.PreReceiveHook(
stream.Context(),
repository,
firstRequest.GetGitPushOptions(),
firstRequest.GetEnvironmentVariables(),
stdin,
stdout,
stderr,
); err != nil {
var exitError *exec.ExitError
if errors.As(err, &exitError) {
return preReceiveHookResponse(stream, int32(exitError.ExitCode()), "")
}
return preReceiveHookResponse(stream, 1, fmt.Sprintf("%s", err))
}
return preReceiveHookResponse(stream, 0, "")
}
func validatePreReceiveHookRequest(in *gitalypb.PreReceiveHookRequest) error {
return service.ValidateRepository(in.GetRepository())
}
func preReceiveHookResponse(stream gitalypb.HookService_PreReceiveHookServer, code int32, stderr string) error {
if err := stream.Send(&gitalypb.PreReceiveHookResponse{
ExitStatus: &gitalypb.ExitStatus{Value: code},
Stderr: []byte(stderr),
}); err != nil {
return structerr.NewInternal("sending response: %w", err)
}
return nil
}
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