Update tsconfig.json

index.js

@@ -1,6 +1,8 @@
 /**
  * @typedef {import('vfile').VFile} VFile
+ * @typedef {import('vfile-message').VFileMessage} VFileMessage
  * @typedef {import('eslint').ESLint.LintResult} LintResult
+ * @typedef {import('eslint').Linter.LintMessage} LintMessage
  */
 
 import {statistics} from 'vfile-statistics'
@@ -15,18 +17,7 @@ export function toESLint(vfiles) {
 
     return {
       filePath: vfile.path,
-      messages: vfile.messages.map((x) => {
-        return {
-          fatal: x.fatal === true ? true : undefined,
-          severity: x.fatal ? 2 : 1,
-          ruleId: [x.source, x.ruleId].filter(Boolean).join(':') || null,
-          line: x.line,
-          column: x.column,
-          endLine: x.position.end.line,
-          endColumn: x.position.end.column,
-          message: x.reason
-        }
-      }),
+      messages: vfile.messages.map((x) => mapMessage(x)),
       fatalErrorCount: stats.fatal,
       errorCount: stats.fatal,
       warningCount: stats.nonfatal,
@@ -37,3 +28,24 @@ export function toESLint(vfiles) {
     }
   })
 }
+
+/**
+ * Map a message.
+ *
+ * @param {VFileMessage} x
+ * @returns {LintMessage}
+ */
+function mapMessage(x) {
+  /* c8 ignore next */
+  const end = x.position ? x.position.end : {line: undefined, column: undefined}
+  return {
+    fatal: x.fatal === true ? true : undefined,
+    severity: x.fatal ? 2 : 1,
+    ruleId: [x.source, x.ruleId].filter(Boolean).join(':') || null,
+    line: x.line || 0,
+    column: x.column || 0,
+    endLine: end.line || undefined,
+    endColumn: end.column || undefined,
+    message: x.reason
+  }
+}

package.json

@@ -54,10 +54,10 @@
   },
   "scripts": {
     "prepack": "npm run build && npm run format",
-    "build": "rimraf \"*.d.ts\" && tsc && type-coverage",
+    "build": "tsc --build --clean && tsc --build && type-coverage",
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "test-api": "node test.js",
-    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov node test.js",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
     "test": "npm run build && npm run format && npm run test-coverage"
   },
   "prettier": {

test.js

@@ -5,6 +5,9 @@ import {toESLint} from './index.js'
 test('toESLint', (t) => {
   const file = new VFile({path: '~/example.md'})
 
+  const message = file.info('?')
+  message.position = null
+
   file.info('This is perfect', {line: 5, column: 3}, 'alpha:bravo')
 
   file.message('This should be fixed', {
@@ -27,14 +30,24 @@ test('toESLint', (t) => {
     {
       filePath: '~/example.md',
       messages: [
+        {
+          fatal: undefined,
+          severity: 1,
+          ruleId: null,
+          line: 0,
+          column: 0,
+          endLine: undefined,
+          endColumn: undefined,
+          message: '?'
+        },
         {
           fatal: undefined,
           severity: 1,
           ruleId: 'alpha:bravo',
           line: 5,
           column: 3,
-          endLine: null,
-          endColumn: null,
+          endLine: undefined,
+          endColumn: undefined,
           message: 'This is perfect'
         },
         {
@@ -60,7 +73,7 @@ test('toESLint', (t) => {
       ],
       fatalErrorCount: 1,
       errorCount: 1,
-      warningCount: 2,
+      warningCount: 3,
       fixableErrorCount: 0,
       fixableWarningCount: 0,
       usedDeprecatedRules: [],

tsconfig.json

@@ -1,15 +1,17 @@
 {
-  "include": ["*.js"],
+  "include": ["**/*.js"],
+  "exclude": ["coverage/", "node_modules/"],
   "compilerOptions": {
-    "target": "ES2020",
-    "lib": ["ES2020"],
-    "module": "ES2020",
-    "moduleResolution": "node",
-    "allowJs": true,
     "checkJs": true,
     "declaration": true,
     "emitDeclarationOnly": true,
-    "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true
+    "exactOptionalPropertyTypes": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["es2020"],
+    "module": "node16",
+    "newLine": "lf",
+    "skipLibCheck": true,
+    "strict": true,
+    "target": "es2020"
   }
 }