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|
package repository
import (
"context"
"io"
"os/exec"
"strings"
"gitlab.com/gitlab-org/gitaly-proto/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/internal/command"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/git/catfile"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/internal/service/commit"
"gitlab.com/gitlab-org/gitaly/streamio"
)
func (s *server) GetArchive(in *gitalypb.GetArchiveRequest, stream gitalypb.RepositoryService_GetArchiveServer) error {
ctx := stream.Context()
compressCmd, format := parseArchiveFormat(in.GetFormat())
path := parsePath(in.GetPath())
if err := validateGetArchiveRequest(in, format, path); err != nil {
return err
}
if err := validateGetArchivePrecondition(ctx, in, path); err != nil {
return err
}
writer := streamio.NewWriter(func(p []byte) error {
return stream.Send(&gitalypb.GetArchiveResponse{Data: p})
})
return handleArchive(ctx, writer, in, compressCmd, format, path)
}
func parseArchiveFormat(format gitalypb.GetArchiveRequest_Format) (*exec.Cmd, string) {
switch format {
case gitalypb.GetArchiveRequest_TAR:
return nil, "tar"
case gitalypb.GetArchiveRequest_TAR_GZ:
return exec.Command("gzip", "-c", "-n"), "tar"
case gitalypb.GetArchiveRequest_TAR_BZ2:
return exec.Command("bzip2", "-c"), "tar"
case gitalypb.GetArchiveRequest_ZIP:
return nil, "zip"
}
return nil, ""
}
func parsePath(path []byte) string {
if path == nil {
return "."
}
return string(path)
}
func validateGetArchiveRequest(in *gitalypb.GetArchiveRequest, format string, path string) error {
if err := git.ValidateRevision([]byte(in.GetCommitId())); err != nil {
return helper.ErrInvalidArgumentf("invalid commitId: %v", err)
}
if len(format) == 0 {
return helper.ErrInvalidArgumentf("invalid format")
}
if helper.ContainsPathTraversal(path) {
return helper.ErrInvalidArgumentf("path can't contain directory traversal")
}
return nil
}
func validateGetArchivePrecondition(ctx context.Context, in *gitalypb.GetArchiveRequest, path string) error {
if path == "." {
return nil
}
c, err := catfile.New(ctx, in.GetRepository())
if err != nil {
return err
}
tef := commit.NewTreeEntryFinder(c)
treeEntry, err := tef.TreeEntryForRevisionAndPath(in.GetCommitId(), strings.TrimRight(path, "/"))
if err != nil {
return err
}
if treeEntry == nil || len(treeEntry.Oid) == 0 {
return helper.ErrPreconditionFailedf("path doesn't exist")
}
return nil
}
func handleArchive(ctx context.Context, writer io.Writer, in *gitalypb.GetArchiveRequest, compressCmd *exec.Cmd, format string, path string) error {
archiveCommand, err := git.Command(ctx, in.GetRepository(), "archive",
"--format="+format, "--prefix="+in.GetPrefix()+"/", in.GetCommitId(), path)
if err != nil {
return err
}
if compressCmd != nil {
command, err := command.New(ctx, compressCmd, archiveCommand, writer, nil)
if err != nil {
return err
}
if err := command.Wait(); err != nil {
return err
}
} else if _, err = io.Copy(writer, archiveCommand); err != nil {
return err
}
return archiveCommand.Wait()
}
|
