Add batch flag for publish commands

cmd/publish.go

@@ -16,6 +16,7 @@ func getSigner(flags *flag.FlagSet) (utils.Signer, error) {
 	signer.SetKey(flags.Lookup("gpg-key").Value.String())
 	signer.SetKeyRing(flags.Lookup("keyring").Value.String(), flags.Lookup("secret-keyring").Value.String())
 	signer.SetPassphrase(flags.Lookup("passphrase").Value.String(), flags.Lookup("passphrase-file").Value.String())
+	signer.SetBatch(flags.Lookup("batch").Value.Get().(bool))
 
 	err := signer.Init()
 	if err != nil {

cmd/publish_switch.go

@@ -136,6 +136,7 @@ Example:
 	cmd.Flag.Bool("skip-signing", false, "don't sign Release files with GPG")
 	cmd.Flag.String("component", "", "component names to update (for multi-component publishing, separate components with commas)")
 	cmd.Flag.Bool("force-overwrite", false, "overwrite files in package pool in case of mismatch")
+	cmd.Flag.Bool("batch", false, "run gpg with a detached tty")
 
 	return cmd
 }

cmd/publish_update.go

@@ -102,6 +102,7 @@ Example:
 	cmd.Flag.String("passphrase-file", "", "GPG passhprase-file for the key (warning: could be insecure)")
 	cmd.Flag.Bool("skip-signing", false, "don't sign Release files with GPG")
 	cmd.Flag.Bool("force-overwrite", false, "overwrite files in package pool in case of mismatch")
+	cmd.Flag.Bool("batch", false, "run gpg with a detached tty")
 
 	return cmd
 }

utils/gpg.go

@@ -18,6 +18,7 @@ type Signer interface {
 	SetKey(keyRef string)
 	SetKeyRing(keyring, secretKeyring string)
 	SetPassphrase(passphrase, passphraseFile string)
+	SetBatch(batch bool)
 	DetachedSign(source string, destination string) error
 	ClearSign(source string, destination string) error
 }
@@ -42,6 +43,11 @@ type GpgSigner struct {
 	keyRef                     string
 	keyring, secretKeyring     string
 	passphrase, passphraseFile string
+	batch	    		   bool
+}
+
+func (g *GpgSigner) SetBatch(batch bool) {
+     	g.batch = batch
 }
 
 // SetKey sets key ID to use when signing files
@@ -79,6 +85,9 @@ func (g *GpgSigner) gpgArgs() []string {
 	if g.passphraseFile != "" {
 		args = append(args, "--passphrase-file", g.passphraseFile)
 	}
+	if g.batch {
+	   	args = append(args, "--no-tty")
+	}
 
 	return args
 }