[gitea] week 2025-03 cherry pick (gitea/main -> forgejo) (#6539)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/6539
Reviewed-by: Gusted <gusted@noreply.codeberg.org>

modules/git/remote.go

@@ -5,6 +5,7 @@ package git
 
 import (
 	"context"
+	"strings"
 
 	giturl "code.gitea.io/gitea/modules/git/url"
 )
@@ -37,3 +38,12 @@ func GetRemoteURL(ctx context.Context, repoPath, remoteName string) (*giturl.Git
 	}
 	return giturl.Parse(addr)
 }
+
+// IsRemoteNotExistError checks the prefix of the error message to see whether a remote does not exist.
+func IsRemoteNotExistError(err error) bool {
+	// see: https://github.com/go-gitea/gitea/issues/32889#issuecomment-2571848216
+	// Should not add space in the end, sometimes git will add a `:`
+	prefix1 := "exit status 128 - fatal: No such remote" // git < 2.30
+	prefix2 := "exit status 2 - error: No such remote"   // git >= 2.30
+	return strings.HasPrefix(err.Error(), prefix1) || strings.HasPrefix(err.Error(), prefix2)
+}