Use the type RefName for all the needed places and fix pull mirror sync bugs (#24634)

This PR replaces all string refName as a type `git.RefName` to make the
code more maintainable.

Fix #15367
Replaces #23070 
It also fixed a bug that tags are not sync because `git remote --prune
origin` will not remove local tags if remote removed.

We in fact should use `git fetch --prune --tags origin` but not `git
remote update origin` to do the sync.

Some answer from ChatGPT as ref.

> If the git fetch --prune --tags command is not working as expected,
there could be a few reasons why. Here are a few things to check:
> 
>Make sure that you have the latest version of Git installed on your
system. You can check the version by running git --version in your
terminal. If you have an outdated version, try updating Git and see if
that resolves the issue.
> 
>Check that your Git repository is properly configured to track the
remote repository's tags. You can check this by running git config
--get-all remote.origin.fetch and verifying that it includes
+refs/tags/*:refs/tags/*. If it does not, you can add it by running git
config --add remote.origin.fetch "+refs/tags/*:refs/tags/*".
> 
>Verify that the tags you are trying to prune actually exist on the
remote repository. You can do this by running git ls-remote --tags
origin to list all the tags on the remote repository.
> 
>Check if any local tags have been created that match the names of tags
on the remote repository. If so, these local tags may be preventing the
git fetch --prune --tags command from working properly. You can delete
local tags using the git tag -d command.

---------

Co-authored-by: delvh <dev.lh@web.de>

1 files changed, 0 insertions, 44 deletions

diff --git a/modules/git/utils.go b/modules/git/utils.go
index 628faf509f..b44363820d 100644
--- a/modules/git/utils.go
+++ b/modules/git/utils.go
@@ -10,8 +10,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-
-	"code.gitea.io/gitea/modules/util"
 )
 
 // ObjectCache provides thread-safe cache operations.
@@ -78,48 +76,6 @@ func ConcatenateError(err error, stderr string) error {
 	return fmt.Errorf("%w - %s", err, stderr)
 }
 
-// RefEndName return the end name of a ref name
-func RefEndName(refStr string) string {
-	if strings.HasPrefix(refStr, BranchPrefix) {
-		return refStr[len(BranchPrefix):]
-	}
-
-	if strings.HasPrefix(refStr, TagPrefix) {
-		return refStr[len(TagPrefix):]
-	}
-
-	return refStr
-}
-
-// RefURL returns the absolute URL for a ref in a repository
-func RefURL(repoURL, ref string) string {
-	refName := util.PathEscapeSegments(RefEndName(ref))
-	switch {
-	case strings.HasPrefix(ref, BranchPrefix):
-		return repoURL + "/src/branch/" + refName
-	case strings.HasPrefix(ref, TagPrefix):
-		return repoURL + "/src/tag/" + refName
-	case !IsValidSHAPattern(ref):
-		// assume they mean a branch
-		return repoURL + "/src/branch/" + refName
-	default:
-		return repoURL + "/src/commit/" + refName
-	}
-}
-
-// SplitRefName splits a full refname to reftype and simple refname
-func SplitRefName(refStr string) (string, string) {
-	if strings.HasPrefix(refStr, BranchPrefix) {
-		return BranchPrefix, refStr[len(BranchPrefix):]
-	}
-
-	if strings.HasPrefix(refStr, TagPrefix) {
-		return TagPrefix, refStr[len(TagPrefix):]
-	}
-
-	return "", refStr
-}
-
 // ParseBool returns the boolean value represented by the string as per git's git_config_bool
 // true will be returned for the result if the string is empty, but valid will be false.
 // "true", "yes", "on" are all true, true