Experimental eslint integration

package.json

@@ -40,6 +40,7 @@
     "chalk": "^4.1.0",
     "cosmiconfig": "^6.0.0",
     "debug": "^4.3.1",
+    "eslint-plugin-package-json": "file:./src/eslint",
     "globby": "^11.0.2",
     "ignore": "^5.1.8",
     "is-plain-obj": "^3.0.0",

src/eslint/index.js

@@ -0,0 +1,5 @@
+const rule = require('./rule');
+
+module.exports.rules = {
+  'package-json': rule,
+};

src/eslint/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "eslint-plugin-package-json",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "dependencies": {
+    "npm-package-json-lint": "file:../../"
+  },
+  "author": "",
+  "license": "ISC"
+}

src/eslint/parser.js

@@ -0,0 +1,21 @@
+module.exports = {
+  parseForESLint(code, {filePath}) {
+    // We don't have JS, so this AST is for empty JS file
+    return {
+      ast: {
+        type: 'Program',
+        start: 0,
+        end: 0,
+        loc: {start: {line: 1, column: 0}, end: {line: 1, column: 0}},
+        range: [0, 0],
+        body: [],
+        tokens: [],
+        comments: [],
+      },
+      services: {
+        getPackageJson: () => code,
+        getPath: () => filePath,
+      },
+    };
+  },
+};

src/eslint/rule.js

@@ -0,0 +1,41 @@
+const {NpmPackageJsonLint} = require('npm-package-json-lint');
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    fixable: 'code',
+    schema: [
+      {
+        type: 'object',
+        properties: {
+          rules: {
+            type: 'object',
+            additionalProperties: true,
+          },
+        },
+        additionalProperties: false,
+      },
+    ],
+  },
+  create(context) {
+    return {
+      Program(node) {
+        const linter = new NpmPackageJsonLint({
+          packageJsonObject: JSON.parse(context.parserServices.getPackageJson()),
+          packageJsonFilePath: context.parserServices.getPath(),
+          config: context.options[0],
+        });
+        const results = linter.lint();
+
+        if (results.results.length > 0) {
+          results.results[0].issues.forEach(({lintMessage, lintId}) => {
+            context.report({
+              node,
+              message: `(${lintId}) ${lintMessage}`,
+            });
+          });
+        }
+      },
+    };
+  },
+};

test/integration/eslint/.eslintrc.js

@@ -0,0 +1,19 @@
+module.exports = {
+  root: true,
+  overrides: [
+    {
+      plugins: ['package-json'],
+      files: ['**/package.json'],
+      parser: '../../../src/eslint/parser.js',
+      rules: {
+        'package-json/package-json': ['error', {
+          rules: {
+            'require-name': 'error',
+            'require-version': 'error',
+            'prefer-alphabetical-scripts': 'error',
+          }
+        }],
+      },
+    },
+  ],
+};

test/integration/eslint/example1/package.json

@@ -0,0 +1,10 @@
+{
+  "main": "index.js",
+  "scripts": {
+    "build": "build script",
+    "test": "jest",
+    "start": "node index.js"
+  },
+  "author": "",
+  "license": "ISC"
+}