perf: init autocorrect wasm only once

Author: typed-sigterm

__tests__/rule.spec.ts

@@ -1,11 +1,11 @@
 import { test } from 'bun:test';
 import { RuleTester } from 'eslint';
-import { rule } from '../src/rule';
+import correct from '../src/rule';
 
 const tester = new RuleTester();
 
 test('rule', () => {
-  tester.run('rule', rule, {
+  tester.run('rule', correct, {
     valid: [{
       filename: '.js',
       code: 'f("Hello 世界")',

src/index.ts

@@ -2,13 +2,14 @@ import type { ESLint } from 'eslint';
 import { version } from '../package.json';
 import correct from './rule';
 
-export default {
+const plugin: ESLint.Plugin = {
   meta: {
-    name: 'eslint-plugin-autocorrect',
+    name: 'autocorrect',
     version,
   },
-
   rules: {
     correct,
   },
-} satisfies ESLint.Plugin;
+};
+
+export default plugin;

src/rule.ts

@@ -12,47 +12,55 @@ interface LintResult {
     c: number
     old: string
     new: string
-    serverity: number
+    serverity: Severity
   }>
   error: string
 }
 
+enum Severity {
+  Pass = 0,
+  Error = 1,
+  Warning = 2,
+}
+
+const wasmUrl = import.meta.resolve('autocorrect-wasm/autocorrect_wasm_bg.wasm');
+const wasm = readFileSync(fileURLToPath(wasmUrl));
+initSync(wasm);
+
 const rule: Rule = {
   meta: {
     type: 'layout',
     fixable: 'whitespace',
     schema: [],
     messages: {
-      issue: 'Issue detected',
+      error: 'Autocorrect error detected',
+      warning: 'Autocorrect warning detected',
+    },
+    docs: {
+      recommended: true,
     },
   },
   create(ctx) {
-    const wasmUrl = import.meta.resolve('autocorrect-wasm/autocorrect_wasm_bg.wasm');
-    const wasm = readFileSync(fileURLToPath(wasmUrl));
-    initSync(wasm);
-
     const sourceCode = ctx.sourceCode as SourceCode;
-    return {
-      Program() {
-        const res: LintResult = lintFor(sourceCode.getText(), ctx.filename ?? '');
-        for (const line of res.lines) {
-          const start = { line: line.l, column: line.c - 1 };
-          const end = { line: line.l, column: line.c - 1 + line.old.length };
-
-          ctx.report({
-            messageId: 'issue',
-            loc: {
-              start: { line: line.l, column: 0 },
-              end: { line: line.l, column: line.old.length },
-            },
-            fix: f => f.replaceTextRange(
-              [sourceCode.getIndexFromLoc(start), sourceCode.getIndexFromLoc(end)],
-              line.new,
-            ),
-          });
-        }
-      },
+    const res: LintResult = lintFor(sourceCode.getText(), ctx.filename ?? '');
+
+    for (const line of res.lines) {
+      const start = { line: line.l, column: line.c - 1 };
+      const end = { line: line.l, column: line.c - 1 + line.old.length };
+      ctx.report({
+        messageId: line.serverity === Severity.Error ? 'error' : 'warning',
+        loc: {
+          start: { line: line.l, column: 0 },
+          end: { line: line.l, column: line.old.length },
+        },
+        fix: f => f.replaceTextRange(
+          [sourceCode.getIndexFromLoc(start), sourceCode.getIndexFromLoc(end)],
+          line.new,
+        ),
+      });
     };
+
+    return {};
   },
 };