feat: add windows support

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/workflows/NodeCI.yml

@@ -9,6 +9,12 @@ on:
 env:
   project_root_path: ./packages/eslint-plugin-svelte
 
+defaults:
+  run:
+    # Setting every runner to bash simplifies command calls;
+    #  plus, every platform supports it
+    shell: bash
+
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -51,7 +57,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, windows-latest]
         eslint: [8, 9]
         node: [18.x, 20.x, 22.x, latest]
     steps:
@@ -84,7 +90,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, windows-latest]
         eslint: [9]
         node: [18, 20, 22]
     steps:
@@ -115,7 +121,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, windows-latest]
         node: [18]
     steps:
       - name: Checkout

.vscode/settings.json

@@ -10,5 +10,6 @@
 	"typescript.tsdk": "node_modules/typescript/lib",
 	"[typescript]": {
 		"editor.defaultFormatter": "esbenp.prettier-vscode"
-	}
+	},
+	"files.eol": "\n"
 }

packages/eslint-plugin-svelte/src/rules/no-unused-props.ts

@@ -4,6 +4,7 @@
 import type ts from 'typescript';
 import { findVariable } from '../utils/ast-utils.js';
 import { toRegExp } from '../utils/regexp.js';
+import { normalize } from 'path';
 
 type PropertyPathArray = string[];
 type DeclaredPropertyNames = Set<{ originalName: string; aliasName: string }>;
@@ -75,11 +76,11 @@
 
 		const options = context.options[0] ?? {};
 
 		// TODO: Remove in v4
 		// MEMO: `ignorePatterns` was a property that only existed from v3.2.0 to v3.2.2.
 		// From v3.3.0, it was replaced with `ignorePropertyPatterns` and `ignoreTypePatterns`.
 		if (options.ignorePatterns != null && !isRemovedWarningShown) {
 			console.warn(
 				'eslint-plugin-svelte: The `ignorePatterns` option in the `no-unused-props` rule has been removed. Please use `ignorePropertyPatterns` or/and `ignoreTypePatterns` instead.'
 			);
 			isRemovedWarningShown = true;
@@ -122,7 +123,8 @@
 			const declarations = symbol.getDeclarations();
 			if (!declarations || declarations.length === 0) return false;
 
-			return declarations.every((decl) => decl.getSourceFile().fileName === fileName);
+			// TypeScript declaration file name is normalized to support Windows style paths
+			return declarations.every((decl) => normalize(decl.getSourceFile().fileName) === fileName);
 		}
 
 		/**

packages/eslint-plugin-svelte/src/rules/valid-style-parse.ts

@@ -1,4 +1,5 @@
 import { createRule } from '../utils/index.js';
+import path from 'path';
 
 export default createRule('valid-style-parse', {
 	meta: {
@@ -16,15 +17,20 @@ export default createRule('valid-style-parse', {
 		if (!sourceCode.parserServices.isSvelte) {
 			return {};
 		}
-		const cwd = `${context.cwd ?? process.cwd()}/`;
+		const cwd = `${context.cwd ?? process.cwd()}${path.sep}`;
 
 		return {
 			SvelteStyleElement(node) {
 				const styleContext = sourceCode.parserServices.getStyleContext!();
 				if (styleContext.status === 'parse-error') {
+					// This will replace backslashes to forward slashes only
+					// 	if Node.js reports Windows style path separators
+					let message = styleContext.error.message.replace(cwd, '');
+					if (path.sep === '\\') message = message.replace(/\\/g, '/');
+
 					context.report({
 						loc: node.loc,
-						message: `Error parsing style element. Error message: "${styleContext.error.message.replace(cwd, '')}"`
+						message: `Error parsing style element. Error message: "${message}"`
 					});
 				}
 				if (styleContext.status === 'unknown-lang') {

packages/eslint-plugin-svelte/tests/src/rules/@typescript-eslint/original-tests/no-unnecessary-condition.ts

@@ -2,13 +2,15 @@
 // https://github.com/typescript-eslint/typescript-eslint/blob/78467fc1bde9bd2db1e08b3d19f151f4adaff8a9/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts
 /* eslint func-style: off, eslint-plugin/consistent-output: off -- respect original  */
 import * as path from 'path';
+import { fileURLToPath } from 'url';
 import { RuleTester } from '../../../../utils/eslint-compat.js';
 import type * as eslint from 'eslint';
 import * as typescriptParser from '@typescript-eslint/parser';
 
 import rule from '../../../../../src/rules/@typescript-eslint/no-unnecessary-condition.js';
 
-const __dirname = path.dirname(new URL(import.meta.url).pathname);
+const url = new URL(import.meta.url);
+const __dirname = path.dirname(fileURLToPath(url));
 
 function getFixturesRootDir(): string {
 	return path.join(__dirname, 'fixtures');

packages/eslint-plugin-svelte/tests/utils/utils.ts

@@ -12,8 +12,9 @@ import * as svelteParser from 'svelte-eslint-parser';
 import * as typescriptParser from '@typescript-eslint/parser';
 import Module from 'module';
 import globals from 'globals';
+import { fileURLToPath } from 'url';
 
-const __dirname = path.dirname(new URL(import.meta.url).pathname);
+const __dirname = path.dirname(fileURLToPath(new URL(import.meta.url)));
 const require = Module.createRequire(import.meta.url);
 
 /**
@@ -304,7 +305,8 @@ function writeFixtures(
 }
 
 function getConfig(ruleName: string, inputFile: string) {
-	const filename = inputFile.slice(inputFile.indexOf(ruleName));
+	// ruleName is normalized to support Windows style paths
+	const filename = inputFile.slice(inputFile.indexOf(path.normalize(ruleName)));
 	const code = fs.readFileSync(inputFile, 'utf8');
 	let config;
 	let configFile = [

packages/eslint-plugin-svelte/tools/update-meta.ts

@@ -1,10 +1,10 @@
-import path from 'path';
+import { fileURLToPath } from 'url';
 import { name, version } from '../package.json';
 import { getNewVersion } from './lib/changesets-util.js';
 import { writeAndFormat } from './lib/write.js';
 
-const __dirname = path.dirname(new URL(import.meta.url).pathname);
-const META_PATH = path.join(__dirname, '../src/meta.ts');
+const fileURL = new URL('../src/meta.ts', import.meta.url);
+const META_PATH = fileURLToPath(fileURL);
 
 void main();
 

prettier.config.cjs

@@ -1,6 +1,7 @@
 'use strict';
 
 module.exports = {
+	endOfLine: 'lf',
 	useTabs: true,
 	singleQuote: true,
 	trailingComma: 'none',