2 files changed, 67 insertions, 0 deletions
diff --git a/tools/lint/wpt/__init__.py b/tools/lint/wpt/__init__.py
new file mode 100644
index 0000000000..c580d191c1
--- /dev/null
+++ b/tools/lint/wpt/__init__.py
@@ -0,0 +1,3 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
diff --git a/tools/lint/wpt/wpt.py b/tools/lint/wpt/wpt.py
new file mode 100644
index 0000000000..6f4f40492a
--- /dev/null
+++ b/tools/lint/wpt/wpt.py
@@ -0,0 +1,64 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import json
+import os
+import subprocess
+import sys
+
+from mozlint import result
+
+results = []
+
+
+def lint(files, config, **kwargs):
+    log = kwargs["log"]
+    tests_dir = os.path.join(kwargs["root"], "testing", "web-platform", "tests")
+
+    def process_line(line):
+        try:
+            data = json.loads(line)
+        except ValueError:
+            print(
+                f"Got non-JSON output: {line}",
+                file=sys.stderr,
+            )
+            return
+
+        data["level"] = "error"
+        data["path"] = os.path.relpath(
+            os.path.join(tests_dir, data["path"]), kwargs["root"]
+        )
+        data.setdefault("lineno", 0)
+        results.append(result.from_config(config, **data))
+
+    if files == [tests_dir]:
+        print(
+            "No specific files specified, running the full wpt lint" " (this is slow)",
+            file=sys.stderr,
+        )
+        files = ["--all"]
+    cmd = ["python3", os.path.join(tests_dir, "wpt"), "lint", "--json"] + files
+    log.debug("Command: {}".format(" ".join(cmd)))
+
+    proc = subprocess.Popen(
+        cmd, env=os.environ, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True
+    )
+    try:
+        for line in proc.stdout:
+            process_line(line.rstrip("\r\n"))
+        proc.wait()
+        if proc.returncode != 0:
+            results.append(
+                result.from_config(
+                    config,
+                    message="Lint process exited with return code %s" % proc.returncode,
+                )
+            )
+    except KeyboardInterrupt:
+        proc.kill()
+
+    return results