migrate script to generate problem matcher from commonjs to ESM

.github/workflows/matcher.yaml

@@ -26,7 +26,7 @@ jobs:
       - name: Update test data
         run: make ./scripts/generate-actionlint-matcher/test/* SKIP_GO_GENERATE=true
       - name: Test actionlint-matcher.json
-        run: node ./scripts/generate-actionlint-matcher/test.js
+        run: node ./scripts/generate-actionlint-matcher/test.mjs
       - name: Ensure .github/actionlint-matcher.json is up-to-date
         run: |
           make .github/actionlint-matcher.json

Makefile

@@ -58,8 +58,8 @@ man: man/actionlint.1
 bench:
 	go test -bench Lint -benchmem
 
-.github/actionlint-matcher.json: scripts/generate-actionlint-matcher/object.js
-	node ./scripts/generate-actionlint-matcher/main.js .github/actionlint-matcher.json
+.github/actionlint-matcher.json: scripts/generate-actionlint-matcher/object.mjs
+	node ./scripts/generate-actionlint-matcher/main.mjs .github/actionlint-matcher.json
 
 scripts/generate-actionlint-matcher/test/escape.txt: actionlint
 	./actionlint -color ./testdata/err/one_error.yaml > ./scripts/generate-actionlint-matcher/test/escape.txt || true

scripts/generate-actionlint-matcher/README.md

@@ -12,13 +12,13 @@ make .github/actionlint-matcher.json
 or directly run the script
 
 ```sh
-node ./scripts/generate-actionlint-matcher/main.js .github/actionlint-matcher.json
+node ./scripts/generate-actionlint-matcher/main.mjs .github/actionlint-matcher.json
 ```
 
 ## Test
 
 ```sh
-node ./scripts/generate-actionlint-matcher/test.js
+node ./scripts/generate-actionlint-matcher/test.mjs
 ```
 
 The test uses test data at `./scripts/generate-actionlint-matcher/test/*.txt`. They should be updated when actionlint changes

scripts/generate-actionlint-matcher/main.js → scripts/generate-actionlint-matcher/main.mjs

@@ -1,5 +1,5 @@
-const fs = require('fs').promises;
-const object = require('./object.js');
+import { promises as fs } from 'node:fs';
+import object from './object.mjs';
 
 async function main(args) {
     const json = JSON.stringify(object, null, 2);

scripts/generate-actionlint-matcher/object.js → scripts/generate-actionlint-matcher/object.mjs

@@ -31,4 +31,4 @@ const object = {
     ],
 };
 
-module.exports = object;
+export default object;

scripts/generate-actionlint-matcher/test.js → scripts/generate-actionlint-matcher/test.mjs

@@ -1,15 +1,20 @@
-const path = require('path');
-const fs = require('fs');
-const assert = require('assert').strict;
-const pattern = require('./object.js').problemMatcher[0].pattern[0];
+import path from 'node:path';
+import fs from 'node:fs';
+import assert from 'node:assert';
+import { fileURLToPath } from 'node:url';
+import object from './object.mjs';
+
+const pattern = object.problemMatcher[0].pattern[0];
 const regexp = new RegExp(pattern.regexp);
+const dirname = path.dirname(fileURLToPath(import.meta.url));
 
 {
-    const want = require('./test/want.json')[0];
+    const file = path.join(dirname, 'test', 'want.json');
+    const want = JSON.parse(fs.readFileSync(file, 'utf8'))[0];
 
     for (const file of ['escape.txt', 'no_escape.txt']) {
         console.log(`Testing test/${file}`);
-        const escaped = path.join(__dirname, 'test', file);
+        const escaped = path.join(dirname, 'test', file);
         const lines = fs.readFileSync(escaped, 'utf8').split('\n');
         const m = lines[0].match(regexp);
         assert.ok(m); // not null
@@ -23,7 +28,7 @@ const regexp = new RegExp(pattern.regexp);
 }
 
 for (const parent of ['examples', 'err']) {
-    const dir = path.join(__dirname, '..', '..', 'testdata', parent);
+    const dir = path.join(dirname, '..', '..', 'testdata', parent);
     for (const name of fs.readdirSync(dir)) {
         if (!name.endsWith('.out')) {
             continue;