chore: add prettier-eslint.

Author: anthogez

.eslintrc.json

@@ -0,0 +1,43 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.eslint.json"
+  },
+  "env": {
+    "node": true,
+    "es6": true
+  },
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier",
+    "prettier/@typescript-eslint"
+  ],
+  "rules": {
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+
+    // non-null assertions compromise the type safety somewhat, but many
+    // our types are still imprecisely defined and we don't use noImplicitAny
+    // anyway, so for the time being assertions are allowed
+    "@typescript-eslint/no-non-null-assertion": "warn",
+    "@typescript-eslint/no-empty-function": "warn",
+    "@typescript-eslint/no-inferrable-types": "off",
+    "@typescript-eslint/no-var-requires": "off",
+    "@typescript-eslint/no-use-before-define": "off",
+    "@typescript-eslint/no-unused-vars": "error",
+    "no-prototype-builtins": "off",
+    "require-atomic-updates": "off",
+    "no-buffer-constructor": "error"
+  },
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "rules": {
+        "id-blacklist": ["error", "exports"] // in TS, use "export" instead of Node's "module.exports"
+      }
+    }
+  ]
+}

.gitignore

@@ -3,5 +3,6 @@ npm-debug.log
 # output
 dist
 .DS_Store
+.eslintcache
 *.log
 /package-lock.json

.prettierrc.json

@@ -0,0 +1,5 @@
+{
+  "arrowParens": "always",
+  "trailingComma": "all",
+  "singleQuote": true
+}

package.json

@@ -6,9 +6,10 @@
     "parse-nodejs-lockfile": "./bin/index.js"
   },
   "scripts": {
-    "test": "npm run lint && npm run unit-test",
+    "test": "npm run unit-test",
     "unit-test": "tap -Rspec ./test/lib/*.test.[tj]s --timeout=300",
-    "lint": "tslint -p tsconfig.json",
+    "lint": "eslint --color --cache '{lib,test}/**/*.{js,ts}' && prettier --check '{lib,test}/**/*.{js,ts}'",
+    "format": "prettier --write '{lib,test}/**/*.{js,ts}'",
     "build": "tsc",
     "build-watch": "tsc -w",
     "prepare": "npm run build"
@@ -42,8 +43,13 @@
     "@types/lodash": "^4.14.136",
     "@types/node": "^6.14.7",
     "@types/uuid": "^3.4.4",
+    "@typescript-eslint/eslint-plugin": "^2.29.0",
+    "@typescript-eslint/parser": "^2.29.0",
+    "eslint": "6.8.0",
+    "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-prettier": "^3.1.3",
+    "prettier": "^1.19.1",
     "tap": "^12.6.1",
-    "tslint": "5.11.0",
     "typescript": "3.8.3"
   }
 }

tsconfig.eslint.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "/dev/null", 
+  },
+  "include": [
+    "./lib/**/*",
+    "./test/**/*"
+  ]
+}