Add wildcard pattern support for core modules

README.md

@@ -404,6 +404,21 @@ core module:
 }
 ```
 
+Wildcard patterns are supported to match multiple modules, using `*` as a wildcard:
+
+```jsonc
+// .eslintrc
+{
+  "settings": {
+    "import/core-modules": [
+      "electron",
+      "@my-monorepo/*", // matches @my-monorepo/package-a, @my-monorepo/package-b, etc.
+      "@my-*/*", // matches @my-org/package, @my-company/package, etc.
+    ],
+  },
+}
+```
+
 In Electron's specific case, there is a shared config named `electron`
 that specifies this for you.
 

src/core/importType.js

@@ -23,6 +23,40 @@ function isInternalRegexMatch(name, settings) {
   return internalScope && new RegExp(internalScope).test(name);
 }
 
+function isDangerousPattern(pattern) {
+  // Block patterns that would match too broadly
+  if (pattern === '*') { return true; }           // Matches everything
+  if (pattern === '**') { return true; }          // Double wildcard
+  if (pattern === '*/*') { return true; }         // Matches any scoped package
+  if (pattern === '.*') { return true; }          // Regex-style wildcard
+  if (pattern.startsWith('.*')) { return true; }  // Regex wildcards
+  if (pattern.endsWith('.*')) { return true; }    // Regex wildcards
+
+  // Block patterns that are too short and broad
+  if (pattern.length <= 2 && pattern.includes('*')) { return true; }
+
+  // Block patterns with multiple wildcards that could be too broad
+  const wildcardCount = (pattern.match(/\*/g) || []).length;
+  if (wildcardCount > 1) {
+    // Allow valid scoped patterns like @namespace/* or @my-*/*, but block overly broad ones
+    if (!pattern.match(/^@[^/]+\/\*$/)) { return true; }
+  }
+
+  return false;
+}
+
+function matchesCoreModulePattern(name, pattern) {
+  // Prevent dangerous patterns that could match too broadly
+  if (isDangerousPattern(pattern)) {
+    return false;
+  }
+
+  const regexPattern = pattern
+    .replace(/[.+^${}()|[\]\\]/g, '\\$&')
+    .replace(/\*/g, '.*');
+  return new RegExp(`^${regexPattern}$`).test(name);
+}
+
 export function isAbsolute(name) {
   return typeof name === 'string' && nodeIsAbsolute(name);
 }
@@ -32,7 +66,9 @@ export function isBuiltIn(name, settings, path) {
   if (path || !name) { return false; }
   const base = baseModule(name);
   const extras = settings && settings['import/core-modules'] || [];
-  return isCoreModule(base) || extras.indexOf(base) > -1;
+  return isCoreModule(base)
+    || extras.indexOf(base) > -1
+    || extras.some((pattern) => pattern.includes('*') && matchesCoreModulePattern(base, pattern));
 }
 
 const moduleRegExp = /^\w/;

tests/src/core/importType.js

@@ -139,6 +139,94 @@ describe('importType(name)', function () {
     expect(importType('@org/foobar/some/path/to/resource.json', scopedContext)).to.equal('builtin');
   });
 
+  it("should return 'builtin' for wildcard patterns in core modules", function () {
+    // Test basic wildcard patterns
+    const wildcardContext = testContext({ 'import/core-modules': ['@my-monorepo/*'] });
+    expect(importType('@my-monorepo/package-a', wildcardContext)).to.equal('builtin');
+    expect(importType('@my-monorepo/package-b', wildcardContext)).to.equal('builtin');
+    expect(importType('@my-monorepo/some-long-package-name', wildcardContext)).to.equal('builtin');
+
+    // Test that non-matching patterns return external
+    expect(importType('@other-org/package', wildcardContext)).to.equal('external');
+    expect(importType('regular-package', wildcardContext)).to.equal('external');
+    expect(importType('@my-monorepo-but-not-scoped/package', wildcardContext)).to.equal('external');
+  });
+
+  it("should return 'builtin' for wildcard patterns with multiple wildcards", function () {
+    const multiWildcardContext = testContext({ 'import/core-modules': ['@my-*/*'] });
+    expect(importType('@my-org/package', multiWildcardContext)).to.equal('builtin');
+    expect(importType('@my-company/package', multiWildcardContext)).to.equal('builtin');
+    expect(importType('@my-test/package', multiWildcardContext)).to.equal('builtin');
+
+    // Should not match different patterns
+    expect(importType('@other-org/package', multiWildcardContext)).to.equal('external');
+    expect(importType('my-org/package', multiWildcardContext)).to.equal('external');
+  });
+
+  it("should return 'builtin' for resources inside wildcard core modules", function () {
+    const wildcardContext = testContext({ 'import/core-modules': ['@my-monorepo/*'] });
+    expect(importType('@my-monorepo/package-a/some/path/to/resource.json', wildcardContext)).to.equal('builtin');
+    expect(importType('@my-monorepo/package-b/nested/module', wildcardContext)).to.equal('builtin');
+  });
+
+  it('should support mixing exact matches and wildcards in core modules', function () {
+    const mixedContext = testContext({ 'import/core-modules': ['electron', '@my-monorepo/*', '@specific/package'] });
+
+    // Exact matches should work
+    expect(importType('electron', mixedContext)).to.equal('builtin');
+    expect(importType('@specific/package', mixedContext)).to.equal('builtin');
+
+    // Wildcard matches should work
+    expect(importType('@my-monorepo/any-package', mixedContext)).to.equal('builtin');
+
+    // Non-matches should be external
+    expect(importType('@other/package', mixedContext)).to.equal('external');
+  });
+
+  it('should handle dangerous wildcard patterns safely', function () {
+    // Test various dangerous patterns that should be blocked
+    const dangerousPatterns = [
+      '*',          // Bare wildcard
+      '**',         // Double wildcard
+      '*/*',        // Any scoped package
+      '.*',         // Regex wildcard
+      '.*foo',      // Regex prefix
+      'foo.*',      // Regex suffix
+      'a*',         // Too short and broad
+      '*a',         // Too short and broad
+      '*foo*',      // Multiple wildcards (too broad)
+      'foo*bar*',   // Multiple wildcards (too broad)
+      '*/*/*',      // Triple wildcards
+    ];
+
+    dangerousPatterns.forEach((pattern) => {
+      const context = testContext({ 'import/core-modules': [pattern] });
+      expect(importType('react', context)).to.equal('external', `Pattern "${pattern}" should not match anything`);
+      expect(importType('lodash', context)).to.equal('external', `Pattern "${pattern}" should not match anything`);
+      expect(importType('@babel/core', context)).to.equal('external', `Pattern "${pattern}" should not match anything`);
+    });
+
+    // Test that valid patterns still work
+    const validPatterns = [
+      '@my-org/*',           // Valid scoped wildcard
+      'my-prefix-*',         // Valid prefix wildcard
+      '@namespace/prefix-*', // Valid scoped prefix wildcard
+      'electron',            // Exact match (no wildcard)
+    ];
+
+    validPatterns.forEach((pattern) => {
+      const context = testContext({ 'import/core-modules': [pattern] });
+      // Should not break the system - external packages should still be external
+      expect(importType('totally-different-package', context)).to.equal('external', `Pattern "${pattern}" should not break normal operation`);
+    });
+
+    // Test specific valid matches
+    const validContext = testContext({ 'import/core-modules': ['@my-org/*', 'my-prefix-*'] });
+    expect(importType('@my-org/package', validContext)).to.equal('builtin');
+    expect(importType('my-prefix-tool', validContext)).to.equal('builtin');
+    expect(importType('react', validContext)).to.equal('external');
+  });
+
   it("should return 'external' for module from 'node_modules' with default config", function () {
     expect(importType('resolve', context)).to.equal('external');
   });

tests/src/rules/no-extraneous-dependencies.js

@@ -155,6 +155,23 @@ ruleTester.run('no-extraneous-dependencies', rule, {
       code: 'import "@generated/bar/and/sub/path"',
       settings: { 'import/core-modules': ['@generated/bar'] },
     }),
+    // Test wildcard patterns in core-modules
+    test({
+      code: 'import "@my-monorepo/package-a"',
+      settings: { 'import/core-modules': ['@my-monorepo/*'] },
+    }),
+    test({
+      code: 'import "@my-monorepo/package-b/nested/module"',
+      settings: { 'import/core-modules': ['@my-monorepo/*'] },
+    }),
+    test({
+      code: 'import "@my-org/any-package"',
+      settings: { 'import/core-modules': ['@my-*/*'] },
+    }),
+    test({
+      code: 'import "@namespace/any-package"',
+      settings: { 'import/core-modules': ['@namespace/*', 'specific-module'] },
+    }),
     // check if "rxjs" dependency declaration fix the "rxjs/operators subpackage
     test({
       code: 'import "rxjs/operators"',