Add js linting to github workflow

.github/workflows/javascript.yaml

@@ -18,11 +18,19 @@ jobs:
 
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      INVENTREE_DB_ENGINE: sqlite3
+      INVENTREE_DB_NAME: inventree
     steps:
+      - name: Install node.js
+        uses: actions/setup-node@v2
+      - run: npm install
       - name: Checkout Code
         uses: actions/checkout@v2
-      - name: Check Files
+      - name: Check Templated Files
         run: |
           cd ci
           python check_js_templates.py
-  
+      - name: Lint Javascript Files
+        run: |
+          invoke render-js-files
+          npx eslint js_tmp/*.js

InvenTree/InvenTree/ci_render_js.py

@@ -74,20 +74,27 @@ class RenderJavascriptFiles(TestCase):
 
         js_files = pathlib.Path(directory).rglob('*.js')
 
+        n = 0
+
         for f in js_files:
             js = os.path.basename(f)
 
             self.download_file(js, prefix)
 
+            n += 1
+
+        return n
+
     def test_render_files(self):
         """
         Look for all javascript files
         """
 
-        self.download_files('translated', '/js/i18n')
+        n = 0
-        self.download_files('dynamic', '/js/dynamic')
-
-
 
+        print("Rendering javascript files...")
 
+        n += self.download_files('translated', '/js/i18n')
+        n += self.download_files('dynamic', '/js/dynamic')
 
+        print(f"Rendered {n} javascript files.")

tasks.py

@@ -457,3 +457,12 @@ def server(c, address="127.0.0.1:8000"):
     """
 
     manage(c, "runserver {address}".format(address=address), pty=True)
+
+
+@task
+def render_js_files(c):
+    """
+    Render templated javascript files (used for static testing).
+    """
+
+    manage(c, "test InvenTree.ci_render_js")