typescript-eslint · JoshuaKGoldberg · Jan 13, 2025 · Jan 3, 2025 · Jan 3, 2025 · Jan 13, 2025
diff --git a/eslint.config.mjs b/eslint.config.mjs
@@ -188,6 +188,7 @@ export default tseslint.config(
       // Internal repo rules
       //
 
+      '@typescript-eslint/internal/debug-namespace': 'error',
       '@typescript-eslint/internal/eqeq-nullish': 'error',
       '@typescript-eslint/internal/no-poorly-typed-ts-props': 'error',
       '@typescript-eslint/internal/no-relative-paths-to-internal-packages':

diff --git a/packages/eslint-plugin-internal/src/rules/debug-namespace.ts b/packages/eslint-plugin-internal/src/rules/debug-namespace.ts
@@ -0,0 +1,65 @@
+import type { TSESTree } from '@typescript-eslint/utils';
+
+import { getStaticValue } from '@typescript-eslint/utils/ast-utils';
+
+import { createRule } from '../util';
+
+function filePathToNamespace(filePath: string) {
+  const relativePath = filePath
+    .split(/packages[\\/]+/)
+    .slice(1)
+    .join('');
+
+  const relativeNamespace = relativePath
+    .replace(/^[\\/]/, '')
+    .replace(/(?:dist|lib|src)\//, '')
+    .replace(/\.\w+$/, '')
+    .replaceAll(/[^a-z0-9-]+/gi, ':');
+
+  return `typescript-eslint:${relativeNamespace}`;
+}
+
+export default createRule({
+  name: __filename,
+  meta: {
+    type: 'problem',
+    docs: {
+      description:
+        'Enforce consistent debug() namespaces based on package name and file path',
+    },
+    fixable: 'code',
+    messages: {
+      mismatched:
+        'debug() namespace should match package and file. Use the fixer to update it.',
+    },
+    schema: [],
+  },
+  defaultOptions: [],
+  create(context) {
+    const expected = filePathToNamespace(context.filename);
+    if (!expected) {
+      return {};
+    }
+
+    return {
+      'VariableDeclarator[id.name="log"] > CallExpression[arguments.length=1][callee.name="debug"]'(
+        node: TSESTree.CallExpression,
+      ) {
+        const [argument] = node.arguments;
+        const staticValue = getStaticValue(argument);
+        if (
+          typeof staticValue?.value !== 'string' ||
+          staticValue.value === expected
+        ) {
+          return;
+        }
+
+        context.report({
+          node: argument,
+          messageId: 'mismatched',
+          fix: fixer => fixer.replaceText(argument, `'${expected}'`),
+        });
+      },
+    };
+  },
+});
diff --git a/packages/eslint-plugin-internal/src/rules/index.ts b/packages/eslint-plugin-internal/src/rules/index.ts
@@ -1,5 +1,6 @@
 import type { Linter } from '@typescript-eslint/utils/ts-eslint';
 
+import debugNamespace from './debug-namespace';
 import eqeqNullish from './eqeq-nullish';
 import noPoorlyTypedTsProps from './no-poorly-typed-ts-props';
 import noRelativePathsToInternalPackages from './no-relative-paths-to-internal-packages';
@@ -9,6 +10,7 @@ import pluginTestFormatting from './plugin-test-formatting';
 import preferASTTypesEnum from './prefer-ast-types-enum';
 
 export default {
+  'debug-namespace': debugNamespace,
   'eqeq-nullish': eqeqNullish,
   'no-poorly-typed-ts-props': noPoorlyTypedTsProps,
   'no-relative-paths-to-internal-packages': noRelativePathsToInternalPackages,

diff --git a/packages/eslint-plugin-internal/tests/rules/debug-namespace.test.ts b/packages/eslint-plugin-internal/tests/rules/debug-namespace.test.ts
@@ -0,0 +1,75 @@
+import { RuleTester } from '@typescript-eslint/rule-tester';
+
+import rule from '../../src/rules/debug-namespace';
+
+const ruleTester = new RuleTester();
+
+ruleTester.run('debug-namespace', rule, {
+  invalid: [
+    {
+      code: "const log = debug('not:correct');",
+      errors: [
+        {
+          column: 19,
+          endColumn: 32,
+          line: 1,
+          messageId: 'mismatched',
+        },
+      ],
+      filename: 'typescript-eslint/packages/example/file.ts',
+      output: "const log = debug('typescript-eslint:example:file');",
+    },
+    {
+      code: "const log = debug('not:correct');",
+      errors: [
+        {
+          column: 19,
+          endColumn: 32,
+          line: 1,
+          messageId: 'mismatched',
+        },
+      ],
+      filename: '/Users/example/typescript-eslint/packages/example/file.ts',
+      output: "const log = debug('typescript-eslint:example:file');",
+    },
+    {
+      code: "const log = debug('not:correct');",
+      errors: [
+        {
+          column: 19,
+          endColumn: 32,
+          line: 1,
+          messageId: 'mismatched',
+        },
+      ],
+      filename: 'C:\\Code\\typescript-eslint\\packages\\example\\file.ts',
+      output: "const log = debug('typescript-eslint:example:file');",
+    },
+  ],
+  valid: [
+    {
+      code: "const log = debug('typescript-eslint:example:file');",
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+    {
+      code: "const logCustom = debug('typescript-eslint:example:file');",
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+    {
+      code: "const logCustom = debug('...');",
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+    {
+      code: "debug('...');",
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+    {
+      code: 'const log = debug(null);',
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+    {
+      code: 'const log = debug(123);',
+      filename: 'typescript-eslint/packages/example/file.ts',
+    },
+  ],
+});
diff --git a/packages/type-utils/src/predicates.ts b/packages/type-utils/src/predicates.ts
@@ -4,7 +4,7 @@ import * as ts from 'typescript';
 
 import { isTypeFlagSet } from './typeFlagUtils';
 
-const log = debug('typescript-eslint:eslint-plugin:utils:types');
+const log = debug('typescript-eslint:type-utils:predicates');
 
 /**
  * Checks if the given type is (or accepts) nullable

diff --git a/packages/typescript-estree/src/create-program/createIsolatedProgram.ts b/packages/typescript-estree/src/create-program/createIsolatedProgram.ts
@@ -7,7 +7,9 @@ import type { ASTAndDefiniteProgram } from './shared';
 import { getScriptKind } from './getScriptKind';
 import { createDefaultCompilerOptionsFromExtra } from './shared';
 
-const log = debug('typescript-eslint:typescript-estree:createIsolatedProgram');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:createIsolatedProgram',
+);
 
 /**
  * @returns Returns a new source file and program corresponding to the linted code

diff --git a/packages/typescript-estree/src/create-program/createProjectProgram.ts b/packages/typescript-estree/src/create-program/createProjectProgram.ts
@@ -9,7 +9,9 @@ import { firstDefined } from '../node-utils';
 import { createProjectProgramError } from './createProjectProgramError';
 import { getAstFromProgram } from './shared';
 
-const log = debug('typescript-eslint:typescript-estree:createProjectProgram');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:createProjectProgram',
+);
 
 /**
  * @param parseSettings Internal settings for parsing the file

diff --git a/packages/typescript-estree/src/create-program/createProjectService.ts b/packages/typescript-estree/src/create-program/createProjectService.ts
@@ -10,7 +10,9 @@ import { validateDefaultProjectForFilesGlob } from './validateDefaultProjectForF
 
 const DEFAULT_PROJECT_MATCHED_FILES_THRESHOLD = 8;
 
-const log = debug('typescript-eslint:typescript-estree:createProjectService');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:createProjectService',
+);
 const logTsserverErr = debug(
   'typescript-eslint:typescript-estree:tsserver:err',
 );

diff --git a/packages/typescript-estree/src/create-program/createSourceFile.ts b/packages/typescript-estree/src/create-program/createSourceFile.ts
@@ -7,7 +7,9 @@ import type { ASTAndNoProgram } from './shared';
 import { isSourceFile } from '../source-files';
 import { getScriptKind } from './getScriptKind';
 
-const log = debug('typescript-eslint:typescript-estree:createSourceFile');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:createSourceFile',
+);
 
 function createSourceFile(parseSettings: ParseSettings): ts.SourceFile {
   log(

diff --git a/packages/typescript-estree/src/create-program/getWatchProgramsForProjects.ts b/packages/typescript-estree/src/create-program/getWatchProgramsForProjects.ts
@@ -14,7 +14,9 @@ import {
   getCanonicalFileName,
 } from './shared';
 
-const log = debug('typescript-eslint:typescript-estree:createWatchProgram');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:getWatchProgramsForProjects',
+);
 
 /**
  * Maps tsconfig paths to their corresponding file contents and resulting watches

diff --git a/packages/typescript-estree/src/create-program/useProvidedPrograms.ts b/packages/typescript-estree/src/create-program/useProvidedPrograms.ts
@@ -8,7 +8,9 @@ import type { ASTAndDefiniteProgram } from './shared';
 import { getParsedConfigFile } from './getParsedConfigFile';
 import { getAstFromProgram } from './shared';
 
-const log = debug('typescript-eslint:typescript-estree:useProvidedProgram');
+const log = debug(
+  'typescript-eslint:typescript-estree:create-program:useProvidedPrograms',
+);
 
 function useProvidedPrograms(
   programInstances: Iterable<ts.Program>,

diff --git a/packages/typescript-estree/src/parseSettings/createParseSettings.ts b/packages/typescript-estree/src/parseSettings/createParseSettings.ts
@@ -19,7 +19,7 @@ import { resolveProjectList } from './resolveProjectList';
 import { warnAboutTSVersion } from './warnAboutTSVersion';
 
 const log = debug(
-  'typescript-eslint:typescript-estree:parser:parseSettings:createParseSettings',
+  'typescript-eslint:typescript-estree:parseSettings:createParseSettings',
 );
 
 let TSCONFIG_MATCH_CACHE: ExpiringCache<string, string> | null;

diff --git a/packages/typescript-estree/src/parseSettings/getProjectConfigFiles.ts b/packages/typescript-estree/src/parseSettings/getProjectConfigFiles.ts
@@ -5,7 +5,9 @@ import * as path from 'node:path';
 import type { TSESTreeOptions } from '../parser-options';
 import type { ParseSettings } from './index';
 
-const log = debug('typescript-eslint:typescript-estree:getProjectConfigFiles');
+const log = debug(
+  'typescript-eslint:typescript-estree:parseSettings:getProjectConfigFiles',
+);
 
 /**
  * Checks for a matching TSConfig to a file including its parent directories,

diff --git a/packages/typescript-estree/src/parseSettings/resolveProjectList.ts b/packages/typescript-estree/src/parseSettings/resolveProjectList.ts
@@ -16,7 +16,7 @@ import {
 } from './ExpiringCache';
 
 const log = debug(
-  'typescript-eslint:typescript-estree:parser:parseSettings:resolveProjectList',
+  'typescript-eslint:typescript-estree:parseSettings:resolveProjectList',
 );
 
 let RESOLUTION_CACHE: ExpiringCache<