[CI] /rerun-test: support glob wildcard patterns (#26422)

.claude/skills/ci-workflow-guide/SKILL.md

@@ -387,7 +387,7 @@ group: pr-test-{event_name}-{branch}-{pr_sha}-{stage}
 | `/tag-and-rerun-ci` | Adds `run-ci` label + reruns failed |
 | `/tag-and-rerun-ci extra` | Adds both `run-ci` and `run-ci-extra` labels + reruns failed |
 | `/rerun-stage <stage>` | Deprecated; posts deprecation notice |
-| `/rerun-test <test-file>` | Reruns a specific test file via `rerun-test.yml` |
+| `/rerun-test <test-file> [<test-file> ...]` | Reruns specific test file(s) via `rerun-test.yml`. A file arg containing a glob metacharacter (`*`, `?`, `[...]`) expands against `test/registered/` and the multimodal test dir to every matching `test_*.py` (e.g. `/rerun-test test_*backend*.py` — wrap in backticks so GitHub doesn't italicize the `*`); matches are deduped, grouped by dispatch shape, and can't carry a `::test` selector. No match → single ⛔ reply, nothing dispatched. Each reply echoes its originating command (`Results for …`) so concurrent commands stay distinguishable |
 | `/rerun-group <group> [<group> ...]` | Expands registered test groups, then reuses `/rerun-test` |
 
 Handled by `scripts/ci/utils/slash_command_handler.py` → `.github/workflows/slash-command-handler.yml`.

scripts/ci/utils/slash_command_handler.py

@@ -486,6 +486,72 @@ def resolve_test_group_specs(group_name):
     return [os.path.relpath(path, "test") for path in test_files], None
 
 
+# A spec is treated as a wildcard pattern (expanding to many files) when its
+# file part contains a glob metacharacter. Plain specs keep the existing
+# single-file resolution, which requires a unique match.
+_GLOB_METACHARS = ("*", "?", "[")
+
+
+def _is_glob_pattern(file_part):
+    return any(ch in file_part for ch in _GLOB_METACHARS)
+
+
+def expand_glob_spec(file_part):
+    """
+    Expand a wildcard file_part into matching test files (repo-relative paths).
+
+    Globs are matched against the same locations resolve_test_file() searches
+    — test/registered/ and the multimodal_gen test dir — so e.g.
+    `test_*backend*.py` reruns every backend test without hand-enumerating
+    each file. Two constraints keep a broad pattern from pulling in non-tests:
+    a match must live under a known test root and be named `test_*.py`.
+
+    glob's `*` matches path separators only via `**`, so a bare pattern is
+    searched recursively under each root; a path-ful pattern is anchored.
+
+    Returns (sorted_repo_relative_paths, error). On success error is None.
+    """
+    pat = file_part
+    if pat.startswith("test/"):
+        pat = pat[len("test/") :]
+
+    matches = set()
+    if "/" in pat:
+        # Path-ful pattern. Glob from the repo root (handles fully qualified
+        # multimodal paths like python/sglang/multimodal_gen/test/**/test_*.py)
+        # and under test/ (handles test/-relative patterns like
+        # registered/attention/test_*.py).
+        for base in (".", "test"):
+            matches.update(glob.glob(os.path.join(base, pat), recursive=True))
+    else:
+        # Bare pattern: search recursively under each known test root.
+        for root in ("test/registered", MULTIMODAL_TEST_DIR):
+            matches.update(glob.glob(os.path.join(root, "**", pat), recursive=True))
+
+    def _under_test_root(path):
+        return path.startswith("test/registered/") or path.startswith(
+            MULTIMODAL_TEST_DIR + "/"
+        )
+
+    files = sorted(
+        {
+            os.path.normpath(p)
+            for p in matches
+            if os.path.isfile(p)
+            and os.path.basename(p).startswith("test_")
+            and p.endswith(".py")
+            and _under_test_root(os.path.normpath(p))
+        }
+    )
+    if not files:
+        return [], (
+            f"No test files matched wildcard `{file_part}` under "
+            f"`test/registered/` or `{MULTIMODAL_TEST_DIR}/` "
+            f"(patterns only match files named `test_*.py`)."
+        )
+    return files, None
+
+
 def resolve_test_file(file_part):
     """
     Resolve a user-provided file path to a path relative to test/ or full path for multimodal.
@@ -887,7 +953,14 @@ def _check_rerun_test_permissions(gh_repo, pr, comment, user_perms, command_name
 
 
 def handle_rerun_test(
-    gh_repo, pr, comment, user_perms, test_specs, token, skip_permission_check=False
+    gh_repo,
+    pr,
+    comment,
+    user_perms,
+    test_specs,
+    token,
+    skip_permission_check=False,
+    command_label=None,
 ):
     """
     Handles the /rerun-test command. Resolves all test specs, groups them by
@@ -907,7 +980,9 @@ def handle_rerun_test(
             "- `/rerun-test test/registered/core/test_srt_endpoint.py::TestSRTEndpoint.test_simple_decode`\n"
             "- `/rerun-test registered/core/test_srt_endpoint.py::TestSRTEndpoint`\n"
             "- `/rerun-test test_srt_endpoint.py`\n"
-            "- `/rerun-test test_a.py test_b.py test_c.py` (multiple tests)"
+            "- `/rerun-test test_a.py test_b.py test_c.py` (multiple tests)\n"
+            "- `/rerun-test test_*backend*.py` (wildcard — reruns every matching "
+            "file; wrap the pattern in backticks so GitHub keeps the `*` literal)"
         )
         return False
 
@@ -917,14 +992,62 @@ def handle_rerun_test(
         pr.create_issue_comment(gate_msg)
         return False
 
-    # Phase 1: Resolve all specs
+    # Phase 0: Expand wildcard specs into concrete test files. A spec whose
-    resolved = []
+    # file part contains a glob metacharacter (* ? [) expands to every
+    # matching file; plain specs pass through to single-file resolution.
     resolve_failures = []
+    seen_failures = set()
+
+    def _record_failure(spec, error):
+        # De-dupe failures by canonical path so the same un-dispatchable file
+        # reported two ways (explicit + glob, or two globs) yields one line.
+        key = spec.strip().strip("\"'`")
+        if key.startswith("test/"):
+            key = key[len("test/") :]
+        if key not in seen_failures:
+            seen_failures.add(key)
+            resolve_failures.append({"spec": spec, "error": error})
+
+    expanded_specs = []
     for spec in test_specs:
+        # Quotes/backticks are never meaningful here (the command isn't
+        # shell-parsed), so strip them. Backtick-wrapping is in fact the
+        # recommended way to write a glob: plain `*backend*` renders as italics
+        # in a GitHub comment, but `` `test_*backend*.py` `` stays literal — and
+        # either way the handler reads the raw body, so the `*` survives.
+        file_part = spec.split("::", 1)[0].strip().strip("\"'`")
+        if not _is_glob_pattern(file_part):
+            expanded_specs.append(spec)
+            continue
+        if "::" in spec:
+            _record_failure(
+                spec,
+                "Wildcard patterns can't be combined with a `::test` "
+                "selector — drop the `::...` to rerun whole files.",
+            )
+            continue
+        matched, err = expand_glob_spec(file_part)
+        if err:
+            _record_failure(spec, err)
+            continue
+        expanded_specs.extend(matched)
+
+    # Phase 1: Resolve all specs, de-duping by the *resolved* identity. A glob
+    # expands to `test/`-prefixed paths while an explicit spec keeps the form
+    # the user typed, so the same file requested both ways resolves to two
+    # different raw strings — keying de-dup on the resolved (mode, test_command)
+    # is what collapses them into a single dispatch instead of running twice.
+    resolved = []
+    seen_commands = set()
+    for spec in expanded_specs:
         r = _resolve_test_spec(spec)
         if r.get("error"):
-            resolve_failures.append(r)
+            _record_failure(r["spec"], r["error"])
-        else:
+            continue
+        key = (r["mode"], r["test_command"])
+        if key in seen_commands:
+            continue
+        seen_commands.add(key)
         resolved.append(r)
 
     # Phase 2: Group by dispatch shape.
@@ -942,7 +1065,8 @@ def handle_rerun_test(
     # Phase 3a: Create placeholder reply comment so we have its ID before
     # dispatching workflows. This lets each dispatched run write its
     # success/failure result back to the right line in this comment.
-    reply_comment = pr.create_issue_comment("🚀 Dispatching rerun-test workflow(s)...")
+    dispatching = f"`{command_label}`" if command_label else "rerun-test workflow(s)"
+    reply_comment = pr.create_issue_comment(f"🚀 Dispatching {dispatching}...")
 
     # Phase 3b: Dispatch one workflow per group, with a unique per-batch
     # marker each. The marker is an HTML comment that the writeback step
@@ -997,6 +1121,11 @@ def handle_rerun_test(
         lines.append(f"⛔ `{r['spec']}`: {r['error']}")
 
     body = "\n\n".join(lines)
+    # Echo the originating command so each reply is self-identifying when
+    # several /rerun-test commands are in flight at once. Backtick-wrapping
+    # also keeps any `*` in the pattern from rendering as italics.
+    if command_label:
+        body = f"Results for `{command_label}`:\n\n{body}"
 
     successes = [dr for dr in dispatch_results if dr["success"]]
     if successes:
@@ -1008,7 +1137,9 @@ def handle_rerun_test(
     return len(successes) > 0
 
 
-def handle_rerun_group(gh_repo, pr, comment, user_perms, group_names, token):
+def handle_rerun_group(
+    gh_repo, pr, comment, user_perms, group_names, token, command_label=None
+):
     """
     Handles the /rerun-group command. Expands one or more registered test
     groups into test file specs, then reuses /rerun-test dispatch behavior.
@@ -1055,6 +1186,7 @@ def handle_rerun_group(gh_repo, pr, comment, user_perms, group_names, token):
         test_specs,
         token,
         skip_permission_check=True,
+        command_label=command_label,
     )
 
 
@@ -1165,11 +1297,27 @@ def main():
 
     elif first_line.startswith("/rerun-group"):
         group_names = first_line.split()[1:]
-        handle_rerun_group(repo, pr, comment, user_perms, group_names or None, token)
+        handle_rerun_group(
+            repo,
+            pr,
+            comment,
+            user_perms,
+            group_names or None,
+            token,
+            command_label=first_line,
+        )
 
     elif first_line.startswith("/rerun-test"):
         test_specs = first_line.split()[1:]
-        handle_rerun_test(repo, pr, comment, user_perms, test_specs or None, token)
+        handle_rerun_test(
+            repo,
+            pr,
+            comment,
+            user_perms,
+            test_specs or None,
+            token,
+            command_label=first_line,
+        )
 
     else:
         print(f"Unknown or ignored command: {first_line}")