git_deploy: refactor tag retrieval

Use git for-each-ref to retreive tags and their associated commit
hashes.  This allows us to limit the amount of tags to 10 and
simplifies the code as the returned objects are already dereferenced.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/components/update_manager/git_deploy.py

@@ -205,9 +205,14 @@ GIT_ENV_VARS = {
     'GIT_HTTP_LOW_SPEED_TIME ': "20"
 }
 GIT_MAX_LOG_CNT = 100
-GIT_LOG_FMT = \
+GIT_LOG_FMT = (
     "\"sha:%H%x1Dauthor:%an%x1Ddate:%ct%x1Dsubject:%s%x1Dmessage:%b%x1E\""
+)
 GIT_OBJ_ERR = "fatal: loose object"
+GIT_REF_FMT = (
+    "'%(if)%(*objecttype)%(then)%(*objecttype) (*objectname)"
+    "%(else)%(objecttype) %(objectname)%(end) %(refname)'"
+)
 
 class GitRepo:
     def __init__(self,
@@ -634,23 +639,19 @@ class GitRepo:
     async def get_tagged_commits(self) -> Dict[str, Any]:
         self._verify_repo()
         async with self.git_operation_lock:
-            resp = await self._run_git_cmd(f"show-ref --tags -d")
+            resp = await self._run_git_cmd(
+                "for-each-ref --count=10 --sort='-creatordate' "
+                f"--format={GIT_REF_FMT} 'refs/tags'")
             tagged_commits: Dict[str, Any] = {}
-            tags = [tag.strip() for tag in resp.split('\n') if tag.strip()]
-            for tag in tags:
-                sha, ref = tag.split(' ', 1)
-                ref = ref.split('/')[-1]
-                if ref[-3:] == "^{}":
-                    # Dereference this commit and overwrite any existing tag
-                    ref = ref[:-3]
-                    tagged_commits[ref] = sha
-                elif ref not in tagged_commits:
-                    # This could be a lightweight tag pointing to a commit.  If
-                    # it is an annotated tag it will be overwritten by the
-                    # dereferenced tag
-                    tagged_commits[ref] = sha
+            for line in resp.split('\n'):
+                parts = line.strip().split()
+                if len(parts) != 3 or parts[0] != "commit":
+                    continue
+                sha, ref = parts[1:]
+                tag = ref.split('/')[-1]
+                tagged_commits[sha] = tag
             # Return tagged commits as SHA keys mapped to tag values
-            return {v: k for k, v in tagged_commits.items()}
+            return tagged_commits
 
     def get_repo_status(self) -> Dict[str, Any]:
         return {