fix how we collect tags on current commit (#1063)

* fix how we collect tags on current commit

* fix dry-run handling

Author: rmorshea

tasks.py

@@ -209,10 +209,8 @@ def publish(context: Context, dry_run: str = ""):
         "js": prepare_js_release,
         "py": prepare_py_release,
     }
-
-    parsed_tags: list[TagInfo] = [
-        parse_tag(tag) for tag in dry_run.split(",") or get_current_tags(context)
-    ]
+    current_tags = dry_run.split(",") if dry_run else get_current_tags(context)
+    parsed_tags = [parse_tag(tag) for tag in current_tags]
 
     publishers: list[Callable[[bool], None]] = []
     for tag_info in parsed_tags:
@@ -315,23 +313,18 @@ def get_current_tags(context: Context) -> set[str]:
         context.run("git diff --cached --exit-code", hide=True)
         context.run("git diff --exit-code", hide=True)
     except Exception:
-        log.error("Cannot create a tag - there are uncommitted changes")
+        log.error("Cannot get current tags - there are uncommitted changes")
         return set()
 
-    tags_per_commit: dict[str, list[str]] = {}
-    for commit, tag in map(
-        str.split,
-        context.run(
-            r"git for-each-ref --format '%(objectname) %(refname:short)' refs/tags",
-            hide=True,
-        ).stdout.splitlines(),
-    ):
-        tags_per_commit.setdefault(commit, []).append(tag)
-
-    current_commit = context.run(
-        "git rev-parse HEAD", silent=True, external=True
-    ).stdout.strip()
-    tags = set(tags_per_commit.get(current_commit, set()))
+    # get tags for current commit
+    tags = {
+        line
+        for line in map(
+            str.strip,
+            context.run("git tag --points-at HEAD", hide=True).stdout.splitlines(),
+        )
+        if line
+    }
 
     if not tags:
         log.error("No tags found for current commit")