[utils] [New] fileExistsWithCaseSync: add strict argument

See import-js#1262.

Author: sergei-startsev

tests/src/core/resolve.js

@@ -3,7 +3,6 @@ import eslintPkg from 'eslint/package.json';
 import semver from 'semver';
 
 import resolve, { CASE_SENSITIVE_FS, fileExistsWithCaseSync } from 'eslint-module-utils/resolve';
-import ModuleCache from 'eslint-module-utils/ModuleCache';
 
 import * as path from 'path';
 import * as fs from 'fs';
@@ -319,7 +318,11 @@ describe('resolve', function () {
   const caseDescribe = (!CASE_SENSITIVE_FS ? describe : describe.skip);
   caseDescribe('case sensitivity', function () {
     let file;
-    const testContext = utils.testContext({ 'import/resolve': { 'extensions': ['.jsx'] } });
+    const testContext = utils.testContext({
+      'import/resolve': { 'extensions': ['.jsx'] },
+      'import/cache': { lifetime: 0 },
+    });
+    const testSettings = testContext.settings;
     before('resolve', function () {
       file = resolve(
       // Note the case difference 'MyUncoolComponent' vs 'MyUnCoolComponent'
@@ -329,14 +332,19 @@ describe('resolve', function () {
       expect(file, 'path to ./jsx/MyUncoolComponent').to.exist;
     });
     it('detects case does not match FS', function () {
-      expect(fileExistsWithCaseSync(file, ModuleCache.getSettings(testContext)))
+      expect(fileExistsWithCaseSync(file, testSettings))
         .to.be.false;
     });
     it('detecting case does not include parent folder path (issue #720)', function () {
       const f = path.join(process.cwd().toUpperCase(), './tests/files/jsx/MyUnCoolComponent.jsx');
-      expect(fileExistsWithCaseSync(f, ModuleCache.getSettings(testContext), true))
+      expect(fileExistsWithCaseSync(f, testSettings))
         .to.be.true;
     });
+    it('detecting case should include parent folder path', function () {
+      const f = path.join(process.cwd().toUpperCase(), './tests/files/jsx/MyUnCoolComponent.jsx');
+      expect(fileExistsWithCaseSync(f, testSettings, true))
+        .to.be.false;
+    });
   });
 
   describe('rename cache correctness', function () {

utils/CHANGELOG.md

@@ -5,6 +5,9 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ## Unreleased
 
+### Added
+- `fileExistsWithCaseSync`: add `strict` argument ([#1262], thanks [@sergei-startsev])
+
 ## v2.6.2 - 2021-08-08
 
 ### Fixed
@@ -102,6 +105,7 @@ Yanked due to critical issue with cache key resulting from #839.
 [#1409]: https://github.com/import-js/eslint-plugin-import/pull/1409
 [#1356]: https://github.com/import-js/eslint-plugin-import/pull/1356
 [#1290]: https://github.com/import-js/eslint-plugin-import/pull/1290
+[#1262]: https://github.com/import-js/eslint-plugin-import/pull/1262
 [#1218]: https://github.com/import-js/eslint-plugin-import/pull/1218
 [#1166]: https://github.com/import-js/eslint-plugin-import/issues/1166
 [#1160]: https://github.com/import-js/eslint-plugin-import/pull/1160
@@ -119,6 +123,7 @@ Yanked due to critical issue with cache key resulting from #839.
 [@kaiyoma]: https://github.com/kaiyoma
 [@manuth]: https://github.com/manuth
 [@pmcelhaney]: https://github.com/pmcelhaney
+[@sergei-startsev]: https://github.com/sergei-startsev
 [@sompylasar]: https://github.com/sompylasar
 [@timkraut]: https://github.com/timkraut
 [@vikr01]: https://github.com/vikr01

utils/resolve.js

@@ -52,13 +52,13 @@ function tryRequire(target, sourceFile) {
 }
 
 // http://stackoverflow.com/a/27382838
-exports.fileExistsWithCaseSync = function fileExistsWithCaseSync(filepath, cacheSettings) {
+exports.fileExistsWithCaseSync = function fileExistsWithCaseSync(filepath, cacheSettings, strict) {
   // don't care if the FS is case-sensitive
   if (CASE_SENSITIVE_FS) return true;
 
   // null means it resolved to a builtin
   if (filepath === null) return true;
-  if (filepath.toLowerCase() === process.cwd().toLowerCase()) return true;
+  if (filepath.toLowerCase() === process.cwd().toLowerCase() && !strict) return true;
   const parsedPath = path.parse(filepath);
   const dir = parsedPath.dir;
 
@@ -73,7 +73,7 @@ exports.fileExistsWithCaseSync = function fileExistsWithCaseSync(filepath, cache
     if (filenames.indexOf(parsedPath.base) === -1) {
       result = false;
     } else {
-      result = fileExistsWithCaseSync(dir, cacheSettings);
+      result = fileExistsWithCaseSync(dir, cacheSettings, strict);
     }
   }
   fileExistsCache.set(filepath, result);