Fix "No files matching the pattern" when using backslash paths on Win…

…dows (#5386)

* Rewrite paths for globby to use forward slash

* Remove stray comment

* Extend tests to verify 'windows paths'

* Use normalize-path for path normalization instead of regex

* Amend tests as suggested in PR comments

* Updated test description

Co-authored-by: Thomas Bowman Mørch <thomas.git@bowmo.dk>

lib/__tests__/standalone-globs.test.js

@@ -112,6 +112,35 @@ describe('standalone globbing', () => {
 		);
 	});
 
+	describe('windows path style with backslash', () => {
+		// The tests fail on non-windows environments.
+		if (process.platform !== 'win32') {
+			return;
+		}
+
+		it('should handle a backslash-separated file path', async () => {
+			const cssGlob = path.win32.join(fixturesPath, 'with spaces', 'styles.css');
+
+			const { results } = await standalone({
+				files: cssGlob,
+				config: {
+					rules: {
+						'block-no-empty': true,
+					},
+				},
+			});
+
+			expect(results).toHaveLength(1);
+			expect(results[0].errored).toEqual(true);
+			expect(results[0].warnings[0]).toEqual(
+				expect.objectContaining({
+					rule: 'block-no-empty',
+					severity: 'error',
+				}),
+			);
+		});
+	});
+
 	describe('mixed globs and paths with special chars', () => {
 		it('manual escaping', async () => {
 			const cssGlob = `${fixturesPath}/got\\[braces\\] and \\(spaces\\)/*.+(s|c)ss`;

lib/standalone.js

@@ -12,6 +12,7 @@ const getFormatterOptionsText = require('./utils/getFormatterOptionsText');
 const globby = require('globby');
 const hash = require('./utils/hash');
 const NoFilesFoundError = require('./utils/noFilesFoundError');
+const normalizePath = require('normalize-path');
 const path = require('path');
 const pkg = require('../package.json');
 const prepareReturnValue = require('./prepareReturnValue');
@@ -176,7 +177,7 @@ module.exports = function (options) {
 
 		if (fs.existsSync(absolutePath)) {
 			// This path points to a file. Return an escaped path to avoid globbing
-			return fastGlob.escapePath(entry);
+			return fastGlob.escapePath(normalizePath(entry));
 		}
 
 		return entry;

package.json

@@ -130,6 +130,7 @@
     "mathml-tag-names": "^2.1.3",
     "meow": "^9.0.0",
     "micromatch": "^4.0.4",
+    "normalize-path": "^3.0.0",
     "normalize-selector": "^0.2.0",
     "postcss": "^8.3.0",
     "postcss-media-query-parser": "^0.2.3",
@@ -158,6 +159,7 @@
     "@types/globjoin": "^0.1.0",
     "@types/imurmurhash": "^0.1.1",
     "@types/micromatch": "^4.0.1",
+    "@types/normalize-path": "^3.0.0",
     "@types/postcss-less": "^4.0.0",
     "@types/postcss-safe-parser": "^5.0.0",
     "@types/style-search": "^0.1.1",