Add configuration validation and refactor handling of unknown identifiers

README.md

@@ -534,7 +534,6 @@ Available plugins are over at [Babel: Plugins List](https://babeljs.io/docs/plug
 
 #### Example: Remove all preconfigured defaults
 
-```javascript
 parserPlugins: []
 ```
 
@@ -571,7 +570,7 @@ parserPlugins: [
       proposal: 'hack',
     },
   ],
-]
+];
 ```
 
 ### `sortImports`

lib/Configuration.js

@@ -1,119 +1,23 @@
 // @flow
 
-import crypto from 'crypto';
 import os from 'os';
 import path from 'path';
 import has from 'lodash/has';
 
-import globals from 'globals';
 import semver from 'semver';
 
 import FileUtils from './FileUtils';
 import JsModule from './JsModule';
-import findPackageDependencies from './findPackageDependencies';
 import meteorEnvironment from './environments/meteorEnvironment';
 import nodeEnvironment from './environments/nodeEnvironment';
 import normalizePath from './normalizePath';
 import version from './version';
-import { DEFAULT_PARSER_PLUGINS } from './parse.js';
+import { validate, getDefaultConfig } from './configurationSchema.js';
 
 const JSON_CONFIG_FILE = '.importjs.json';
 const JS_CONFIG_FILES = ['.importjs.js', '.importjs.cjs', '.importjs.mjs'];
 
-function findGlobalsFromEnvironments(
-  environments: Array<string>,
-): Array<string> {
-  const result = Object.keys(globals.builtin);
-
-  environments.forEach((environment: string) => {
-    const envGlobals = globals[environment];
-    if (!envGlobals) {
-      return;
-    }
-    result.push(...Object.keys(envGlobals));
-  });
-  return result;
-}
-
-const DEFAULT_CONFIG = {
-  aliases: {},
-  declarationKeyword: 'import',
-  cacheLocation: ({ config }: Object): string => {
-    const hash = crypto
-      .createHash('md5')
-      .update(`${config.workingDirectory}-v4`)
-      .digest('hex');
-    return path.join(os.tmpdir(), `import-js-${hash}.db`);
-  },
-  coreModules: [],
-  namedExports: {},
-  environments: [],
-  excludes: [],
-  globals: ({ config }: Object): Array<string> =>
-    findGlobalsFromEnvironments(config.get('environments')),
-  groupImports: true,
-  ignorePackagePrefixes: [],
-  importDevDependencies: false,
-  importFunction: 'require',
-  importStatementFormatter: ({ importStatement }: Object): string =>
-    importStatement,
-  logLevel: 'info',
-  maxLineLength: 80,
-  minimumVersion: '0.0.0',
-  moduleNameFormatter: ({ moduleName }: Object): string => moduleName,
-  moduleSideEffectImports: (): Array<string> => [],
-  sortImports: true,
-  emptyLineBetweenGroups: true,
-  stripFileExtensions: ['.js', '.jsx', '.ts', '.tsx'],
-  danglingCommas: true,
-  tab: '  ',
-  useRelativePaths: true,
-  packageDependencies: ({ config }: Object): Set<string> =>
-    findPackageDependencies(
-      config.workingDirectory,
-      config.get('importDevDependencies'),
-    ),
-  // Default configuration options, and options inherited from environment
-  // configuration are overridden if they appear in user config. Some options,
-  // however, get merged with the parent configuration. This list specifies which
-  // ones are merged.
-  mergableOptions: {
-    aliases: true,
-    coreModules: true,
-    namedExports: true,
-    globals: true,
-  },
-  parserPlugins: DEFAULT_PARSER_PLUGINS,
-};
-
-const KNOWN_CONFIGURATION_OPTIONS = [
-  'aliases',
-  'cacheLocation',
-  'coreModules',
-  'declarationKeyword',
-  'environments',
-  'excludes',
-  'globals',
-  'groupImports',
-  'ignorePackagePrefixes',
-  'importDevDependencies',
-  'importFunction',
-  'importStatementFormatter',
-  'logLevel',
-  'maxLineLength',
-  'minimumVersion',
-  'moduleNameFormatter',
-  'moduleSideEffectImports',
-  'namedExports',
-  'sortImports',
-  'stripFileExtensions',
-  'tab',
-  'useRelativePaths',
-  'mergableOptions',
-  'danglingCommas',
-  'emptyLineBetweenGroups',
-  'parserPlugins',
-];
+const DEFAULT_CONFIG = getDefaultConfig();
 
 const DEPRECATED_CONFIGURATION_OPTIONS = [];
 
@@ -122,16 +26,12 @@ const ENVIRONMENTS = {
   meteor: meteorEnvironment,
 };
 
-function checkForUnknownConfiguration(config: Object): Array<string> {
+function checkConfiguration(config: Object): Array<string> {
   const messages = [];
 
-  Object.keys(config).forEach((option: string) => {
-    if (KNOWN_CONFIGURATION_OPTIONS.indexOf(option) === -1) {
-      messages.push(`Unknown configuration: \`${option}\``);
-    }
-  });
+  const result = validate(config);
 
-  return messages;
+  return result.messages;
 }
 
 function checkForDeprecatedConfiguration(config: Object): Array<string> {
@@ -242,7 +142,7 @@ export default class Configuration {
 
     if (userConfig) {
       this.configs.push(userConfig);
-      this.messages.push(...checkForUnknownConfiguration(userConfig));
+      this.messages.push(...checkConfiguration(userConfig));
       this.messages.push(...checkForDeprecatedConfiguration(userConfig));
 
       // Add configurations for the environments specified in the user config

lib/__tests__/ImportStatements-test.js

@@ -119,7 +119,7 @@ describe('ImportStatements', () => {
       beforeEach(() => {
         FileUtils.__setFile(path.join(process.cwd(), '.importjs.js'), {
           environments: ['meteor'],
-          packageDependencies: new Set(['meteor/bar']),
+          packageDependencies: ['meteor/bar'],
         });
       });
 

lib/__tests__/configurationSchema-test.js

@@ -0,0 +1,45 @@
+import { validate, getDefaultConfig } from '../configurationSchema.js';
+
+it('should export defaults as an object', () => {
+  const config = getDefaultConfig();
+
+  expect(config.aliases).toEqual({});
+});
+
+it('should validate successfully', () => {
+  const result = validate({
+    aliases: {
+      _: 'third-party-libs/underscore',
+    },
+  });
+  expect(result.error).toEqual(false);
+  expect(result.messages).toEqual([]);
+});
+
+it('should notify about unknown identifiers, and remove them', () => {
+  const data = {
+    thisAintRight: 'better fail',
+  };
+  const result = validate(data);
+  expect(result.error).toEqual(true);
+  expect(result.messages[0]).toEqual('Unknown configuration: `thisAintRight`');
+  expect(data.hasOwnProperty('thisAintRight')).toBe(false);
+});
+
+it('should handle functions', () => {
+  const result = validate({
+    aliases: () => ({ _: 'third-party-libs/underscore' }),
+  });
+  expect(result.error).toEqual(false);
+});
+
+it('should notify about invalid identifiers, and remove them', () => {
+  const data = {
+    aliases: 123,
+  };
+  const result = validate(data);
+  expect(result.error).toEqual(true);
+  expect(result.messages.length).toEqual(1);
+  expect(result.messages[0]).toEqual('Invalid configuration: `aliases`');
+  expect(data.hasOwnProperty('aliases')).toBe(false);
+});