Add eslint, and a job in .gitlab-ci.yml to auto run linting on merges

.eslintrc.json

@@ -0,0 +1,36 @@
+{
+	"ignorePatterns": ["docker/", "tmp/", "static/", "gulp/res/css/", "gulp/res/icons/", "gulp/res/img/", "tools/", "views/", "node_modules/", "gulp/res/js/tegaki.js"],
+    "env": {
+        "node": true,
+        "browser": true,
+        "commonjs": true,
+        "es2021": true,
+        "jest/globals": true
+    },
+    "plugins": [
+    	"jest"
+    ],
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": "latest"
+    },
+    "rules": {
+        "indent": [
+            "error",
+            "tab",
+            { "SwitchCase": 1, "ignoreComments": true, "MemberExpression": 1 }
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+}

.gitlab-ci.yml

@@ -1,7 +1,19 @@
 image: node:latest
 
-javascript:
-  stage: test
+# Code linting
+linting:
+  stage: eslint
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+  script:
+    - 'npm i -g eslint-cli'
+    - 'npm i eslint --save-dev'
+    - 'node node_modules\eslint\bin\eslint.js'
+  allow_failure: true
+
+# Run tests
+testing:
+  stage: unit-tests
   rules:
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
   script:
@@ -14,3 +26,5 @@ javascript:
     reports:
       junit:
         - junit.xml
+        
+  #TODO: stage: integration-tests

package.json

@@ -53,6 +53,8 @@
     "unix-crypt-td-js": "^1.1.4"
   },
   "devDependencies": {
+    "eslint": "^8.14.0",
+    "eslint-plugin-jest": "^26.1.5",
     "jest": "^27.5.1",
     "jest-cli": "^27.5.1",
     "jest-junit": "^13.1.0"