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package main
import (
"errors"
"fmt"
"io"
"log"
"os"
"github.com/urfave/cli/v2"
"gitlab.com/gitlab-org/gitaly/v16/internal/signature"
)
func gpgApp() *cli.App {
return &cli.App{
Flags: []cli.Flag{
&cli.IntFlag{Name: "status-fd"},
&cli.BoolFlag{Name: "verify"},
&cli.BoolFlag{Name: "bsau"},
},
Action: func(cCtx *cli.Context) error {
// Git passes the --status-fd=2 flag into the gpg call.
if cCtx.Int("status-fd") != 2 {
return errors.New("expected --status-fd=2")
}
signingKeys, err := signature.ParseSigningKeys(cCtx.Args().First())
if err != nil {
return fmt.Errorf("reading signed key file %s : %w", cCtx.Args().First(), err)
}
contents, err := io.ReadAll(cCtx.App.Reader)
if err != nil {
return fmt.Errorf("reading contents from stdin: %w", err)
}
sig, err := signingKeys.CreateSignature(contents)
if err != nil {
return fmt.Errorf("creating signature: %w", err)
}
// Git looks for this output string as part of GPG output.
if _, err := cCtx.App.ErrWriter.Write([]byte("[GNUPG:] SIG_CREATED ")); err != nil {
return fmt.Errorf("printing to stdout: %w", err)
}
if _, err := cCtx.App.Writer.Write(sig); err != nil {
return fmt.Errorf("printing to stdout: %w", err)
}
if _, err := cCtx.App.Writer.Write([]byte("\n")); err != nil {
return fmt.Errorf("printing to stdout: %w", err)
}
return nil
},
}
}
func main() {
if err := gpgApp().Run(os.Args); err != nil {
log.Fatal(err)
}
}
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