1 files changed, 44 insertions, 0 deletions
diff --git a/pw_presubmit/py/pw_presubmit/javascript_checks.py b/pw_presubmit/py/pw_presubmit/javascript_checks.py
new file mode 100644
index 000000000..3dc8b8f68
--- /dev/null
+++ b/pw_presubmit/py/pw_presubmit/javascript_checks.py
@@ -0,0 +1,44 @@
+# Copyright 2023 The Pigweed Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+"""JavaScript and TypeScript validity check."""
+
+from pw_presubmit import presubmit_context
+from pw_presubmit.presubmit import (
+    Check,
+    filter_paths,
+)
+from pw_presubmit.presubmit_context import (
+    PresubmitContext,
+    PresubmitFailure,
+)
+from pw_presubmit.tools import log_run
+
+
+@filter_paths(endswith=('.js', '.ts'))
+@Check
+def eslint(ctx: PresubmitContext):
+    """Presubmit check that ensures JavaScript files are valid."""
+
+    ctx.paths = presubmit_context.apply_exclusions(ctx)
+
+    # Check if npm deps are installed.
+    npm_list = log_run(['npm', 'list'])
+    if npm_list.returncode != 0:
+        npm_install = log_run(['npm', 'install'])
+        if npm_install.returncode != 0:
+            raise PresubmitFailure('npm install failed.')
+
+    result = log_run(['npx', 'eslint@8.47.0', *ctx.paths])
+    if result.returncode != 0:
+        raise PresubmitFailure('eslint identifed issues.')