style: added prettier and re-format the code

Author: logaretm

.eslintrc.json

@@ -0,0 +1,10 @@
+{
+  "env": {
+    "browser": true,
+    "commonjs": true,
+    "es6": true,
+    "jest/globals": true
+  },
+  "extends": ["plugin:jest/recommended", "plugin:prettier/recommended"],
+  "plugins": ["jest", "prettier"]
+}

.prettierrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+  printWidth: 120,
+  tabWidth: 2,
+  semi: true,
+  singleQuote: true,
+  bracketSpacing: true,
+  arrowParens: 'avoid',
+  endOfLine: 'lf',
+};

commitlint.config.js

@@ -0,0 +1,18 @@
+module.exports = {
+  rules: {
+    'body-leading-blank': [1, 'always'],
+    'footer-leading-blank': [1, 'always'],
+    'header-max-length': [2, 'always', 72],
+    'scope-case': [2, 'always', 'lower-case'],
+    'subject-case': [2, 'never', ['sentence-case', 'start-case', 'pascal-case', 'upper-case']],
+    'subject-empty': [2, 'never'],
+    'subject-full-stop': [2, 'never', '.'],
+    'type-case': [2, 'always', 'lower-case'],
+    'type-empty': [2, 'never'],
+    'type-enum': [
+      2,
+      'always',
+      ['build', 'chore', 'ci', 'docs', 'feat', 'fix', 'perf', 'refactor', 'revert', 'style', 'test'],
+    ],
+  },
+};

index.js

@@ -30,11 +30,11 @@ function GraphQLTagPrintedLoader(src) {
   }
 
   return newSource + os.EOL;
-};
+}
 
 // Makes it work with Jest as well
-GraphQLTagPrintedLoader.process = (src) => {
-  return GraphQLTagPrintedLoader.call({ cacheable() { } }, src);
+GraphQLTagPrintedLoader.process = src => {
+  return GraphQLTagPrintedLoader.call({ cacheable() {} }, src);
 };
 
 module.exports = GraphQLTagPrintedLoader;

jest.config.js

@@ -1,7 +1,7 @@
 module.exports = {
   rootDir: __dirname,
   testMatch: ['<rootDir>/tests/**/*spec.[jt]s?(x)'],
-  "transform": {
-    "\\.(gql|graphql)$": __dirname + '/index.js',
-  }
+  transform: {
+    '\\.(gql|graphql)$': __dirname + '/index.js',
+  },
 };

package.json

@@ -6,14 +6,40 @@
   "author": "Abdelrahman Awad",
   "license": "MIT",
   "scripts": {
-    "test": "jest"
+    "test": "jest",
+    "lint": "eslint . '**/*.{js,jsx,ts,tsx}' --fix",
+    "format": "prettier \"./**/*.js\" --write"
   },
+  "files": [
+    "index.js"
+  ],
   "dependencies": {
     "eval": "^0.1.4",
     "graphql": "^15.0.0",
     "graphql-tag": "^2.10.3"
   },
   "devDependencies": {
-    "jest": "^26.0.1"
+    "@commitlint/cli": "^8.3.5",
+    "eslint": "^7.0.0",
+    "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-jest": "^23.13.1",
+    "eslint-plugin-prettier": "^3.1.3",
+    "husky": "^4.2.5",
+    "jest": "^26.0.1",
+    "lint-staged": "^10.2.4",
+    "prettier": "^2.0.5"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged",
+      "commit-msg": "commitlint --edit -E HUSKY_GIT_PARAMS"
+    }
+  },
+  "lint-staged": {
+    "*.js": [
+      "eslint --fix",
+      "prettier --write",
+      "jest --maxWorkers=1 --bail --findRelatedTests"
+    ]
   }
 }