fix: not flaky catalogue generate

See toolshed/abra#464

pkg/git/clone.go

@@ -1,9 +1,7 @@
 package git
 
 import (
-	"fmt"
 	"os"
-	"path/filepath"
 	"strings"
 
 	"coopcloud.tech/abra/pkg/log"
@@ -11,10 +9,23 @@ import (
 	"github.com/go-git/go-git/v5/plumbing"
 )
 
+// gitCloneIgnoreErr checks whether we can ignore a git clone error or not.
+func gitCloneIgnoreErr(err error) bool {
+	if strings.Contains(err.Error(), "authentication required") {
+		return true
+	}
+
+	if strings.Contains(err.Error(), "remote repository is empty") {
+		return true
+	}
+
+	return false
+}
+
 // Clone runs a git clone which accounts for different default branches.
 func Clone(dir, url string) error {
 	if _, err := os.Stat(dir); os.IsNotExist(err) {
-		log.Debugf("%s does not exist, attempting git clone of %s", dir, url)
+		log.Debugf("git clone: %s", dir, url)
 
 		_, err := git.PlainClone(dir, false, &git.CloneOptions{
 			URL:           url,
@@ -23,6 +34,11 @@ func Clone(dir, url string) error {
 			SingleBranch:  true,
 		})
 
+		if err != nil && gitCloneIgnoreErr(err) {
+			log.Debugf("git clone: %s cloned successfully", dir)
+			return nil
+		}
+
 		if err != nil {
 			log.Debug("git clone: main branch failed, attempting master branch")
 
@@ -32,12 +48,13 @@ func Clone(dir, url string) error {
 				ReferenceName: plumbing.ReferenceName("refs/heads/master"),
 				SingleBranch:  true,
 			})
-			if err != nil {
-				if strings.Contains(err.Error(), "authentication required") {
-					name := filepath.Base(dir)
-					return fmt.Errorf("unable to clone %s, does %s exist?", name, url)
-				}
 
+			if err != nil && gitCloneIgnoreErr(err) {
+				log.Debugf("git clone: %s cloned successfully", dir)
+				return nil
+			}
+
+			if err != nil {
 				return err
 			}
 		}