Add step to check lint in pull requests (#460)

* Add step to check lint in pull requests

* Use os.EX_DATAERR instead of os.EX_NOTFOUND (available in Unix only)

.github/workflows/test-build.yaml

@@ -25,7 +25,16 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
-
+
+      - name: Check code lint
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: docker/Dockerfile
+          push: false
+          target: "lint"
+          tags: ghcr.io/${{ github.repository }}:${{ github.sha }}-lint
+
       - name: Verify production image builds
         uses: docker/build-push-action@v2
         with:

ctms/bin/acoustic_fields.py

@@ -56,7 +56,7 @@ def main(dbsession, args=None) -> int:
         )
         if not row:
             print(f"Unknown field '{args.tablename}.{args.field}'. Give up.")
-            return os.EX_NOTFOUND
+            return os.EX_DATAERR
         dbsession.delete(row)
         dbsession.commit()
         print("Removed.")