Retry commit if signing fails (#277)

This commit modifies the clone commit code to retry with the
pure go commit implementation if signing fails. It will only
do so if 1) UseGit was not specified and 2) Signing was not specified.

Signed-off-by: Adolfo Garcia Veytia (puerco) <[email protected]>

Author: puerco

pkg/repo/clone.go

@@ -10,6 +10,7 @@ import (
 	"log"
 	"os"
 	"os/exec"
+	"strings"
 
 	billy "github.com/go-git/go-billy/v6"
 	git "github.com/go-git/go-git/v6"
@@ -159,7 +160,14 @@ func (c *Clone) Commit(opts *options.CommitOptions) error {
 		usegit = *opts.UseGit
 	}
 	if usegit {
-		return c.gitCliCommit(opts)
+		if err := c.gitCliCommit(opts); err != nil {
+			// If signing is not defined and the commit failed
+			// signing, try again with the pure go signature.
+			if opts.Sign == nil && opts.UseGit == nil && strings.Contains(err.Error(), "gpg failed") {
+				return c.puregoCommit(opts)
+			}
+			return err
+		}
 	}
 	return c.puregoCommit(opts)
 }