'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); exports.recursivePatternCapture = recursivePatternCapture; var _fs = require('fs'); var _fs2 = _interopRequireDefault(_fs); var _doctrine = require('doctrine'); var _doctrine2 = _interopRequireDefault(_doctrine); var _debug = require('debug'); var _debug2 = _interopRequireDefault(_debug); var _eslint = require('eslint'); var _parse = require('eslint-module-utils/parse'); var _parse2 = _interopRequireDefault(_parse); var _resolve = require('eslint-module-utils/resolve'); var _resolve2 = _interopRequireDefault(_resolve); var _ignore = require('eslint-module-utils/ignore'); var _ignore2 = _interopRequireDefault(_ignore); var _hash = require('eslint-module-utils/hash'); var _unambiguous = require('eslint-module-utils/unambiguous'); var unambiguous = _interopRequireWildcard(_unambiguous); function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } } function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } const log = (0, _debug2.default)('eslint-plugin-import:ExportMap'); const exportCache = new Map(); class ExportMap { constructor(path) { this.path = path; this.namespace = new Map(); // todo: restructure to key on path, value is resolver + map of names this.reexports = new Map(); /** * star-exports * @type {Set} of () => ExportMap */ this.dependencies = new Set(); /** * dependencies of this module that are not explicitly re-exported * @type {Map} from path = () => ExportMap */ this.imports = new Map(); this.errors = []; } get hasDefault() { return this.get('default') != null; } // stronger than this.has get size() { let size = this.namespace.size + this.reexports.size; this.dependencies.forEach(dep => { const d = dep(); // CJS / ignored dependencies won't exist (#717) if (d == null) return; size += d.size; }); return size; } /** * Note that this does not check explicitly re-exported names for existence * in the base namespace, but it will expand all `export * from '...'` exports * if not found in the explicit namespace. * @param {string} name * @return {Boolean} true if `name` is exported by this module. */ has(name) { if (this.namespace.has(name)) return true; if (this.reexports.has(name)) return true; // default exports must be explicitly re-exported (#328) if (name !== 'default') { for (let dep of this.dependencies) { let innerMap = dep(); // todo: report as unresolved? if (!innerMap) continue; if (innerMap.has(name)) return true; } } return false; } /** * ensure that imported name fully resolves. * @param {[type]} name [description] * @return {Boolean} [description] */ hasDeep(name) { if (this.namespace.has(name)) return { found: true, path: [this] }; if (this.reexports.has(name)) { const reexports = this.reexports.get(name), imported = reexports.getImport(); // if import is ignored, return explicit 'null' if (imported == null) return { found: true, path: [this] // safeguard against cycles, only if name matches };if (imported.path === this.path && reexports.local === name) { return { found: false, path: [this] }; } const deep = imported.hasDeep(reexports.local); deep.path.unshift(this); return deep; } // default exports must be explicitly re-exported (#328) if (name !== 'default') { for (let dep of this.dependencies) { let innerMap = dep(); // todo: report as unresolved? if (!innerMap) continue; // safeguard against cycles if (innerMap.path === this.path) continue; let innerValue = innerMap.hasDeep(name); if (innerValue.found) { innerValue.path.unshift(this); return innerValue; } } } return { found: false, path: [this] }; } get(name) { if (this.namespace.has(name)) return this.namespace.get(name); if (this.reexports.has(name)) { const reexports = this.reexports.get(name), imported = reexports.getImport(); // if import is ignored, return explicit 'null' if (imported == null) return null; // safeguard against cycles, only if name matches if (imported.path === this.path && reexports.local === name) return undefined; return imported.get(reexports.local); } // default exports must be explicitly re-exported (#328) if (name !== 'default') { for (let dep of this.dependencies) { let innerMap = dep(); // todo: report as unresolved? if (!innerMap) continue; // safeguard against cycles if (innerMap.path === this.path) continue; let innerValue = innerMap.get(name); if (innerValue !== undefined) return innerValue; } } return undefined; } forEach(callback, thisArg) { this.namespace.forEach((v, n) => callback.call(thisArg, v, n, this)); this.reexports.forEach((reexports, name) => { const reexported = reexports.getImport(); // can't look up meta for ignored re-exports (#348) callback.call(thisArg, reexported && reexported.get(reexports.local), name, this); }); this.dependencies.forEach(dep => { const d = dep(); // CJS / ignored dependencies won't exist (#717) if (d == null) return; d.forEach((v, n) => n !== 'default' && callback.call(thisArg, v, n, this)); }); } // todo: keys, values, entries? reportErrors(context, declaration) { context.report({ node: declaration.source, message: `Parse errors in imported module '${declaration.source.value}': ` + `${this.errors.map(e => `${e.message} (${e.lineNumber}:${e.column})`).join(', ')}` }); } } exports.default = ExportMap; /** * parse docs from the first node that has leading comments */ function captureDoc(source, docStyleParsers) { const metadata = {}; // 'some' short-circuits on first 'true' for (var _len = arguments.length, nodes = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) { nodes[_key - 2] = arguments[_key]; } nodes.some(n => { try { let leadingComments; // n.leadingComments is legacy `attachComments` behavior if ('leadingComments' in n) { leadingComments = n.leadingComments; } else if (n.range) { leadingComments = source.getCommentsBefore(n); } if (!leadingComments || leadingComments.length === 0) return false; for (let name in docStyleParsers) { const doc = docStyleParsers[name](leadingComments); if (doc) { metadata.doc = doc; } } return true; } catch (err) { return false; } }); return metadata; } const availableDocStyleParsers = { jsdoc: captureJsDoc, tomdoc: captureTomDoc /** * parse JSDoc from leading comments * @param {...[type]} comments [description] * @return {{doc: object}} */ };function captureJsDoc(comments) { let doc; // capture XSDoc comments.forEach(comment => { // skip non-block comments if (comment.type !== 'Block') return; try { doc = _doctrine2.default.parse(comment.value, { unwrap: true }); } catch (err) { /* don't care, for now? maybe add to `errors?` */ } }); return doc; } /** * parse TomDoc section from comments */ function captureTomDoc(comments) { // collect lines up to first paragraph break const lines = []; for (let i = 0; i < comments.length; i++) { const comment = comments[i]; if (comment.value.match(/^\s*$/)) break; lines.push(comment.value.trim()); } // return doctrine-like object const statusMatch = lines.join(' ').match(/^(Public|Internal|Deprecated):\s*(.+)/); if (statusMatch) { return { description: statusMatch[2], tags: [{ title: statusMatch[1].toLowerCase(), description: statusMatch[2] }] }; } } ExportMap.get = function (source, context) { const path = (0, _resolve2.default)(source, context); if (path == null) return null; return ExportMap.for(childContext(path, context)); }; ExportMap.for = function (context) { const path = context.path; const cacheKey = (0, _hash.hashObject)(context).digest('hex'); let exportMap = exportCache.get(cacheKey); // return cached ignore if (exportMap === null) return null; const stats = _fs2.default.statSync(path); if (exportMap != null) { // date equality check if (exportMap.mtime - stats.mtime === 0) { return exportMap; } // future: check content equality? } // check valid extensions first if (!(0, _ignore.hasValidExtension)(path, context)) { exportCache.set(cacheKey, null); return null; } // check for and cache ignore if ((0, _ignore2.default)(path, context)) { log('ignored path due to ignore settings:', path); exportCache.set(cacheKey, null); return null; } const content = _fs2.default.readFileSync(path, { encoding: 'utf8' }); // check for and cache unambigious modules if (!unambiguous.test(content)) { log('ignored path due to unambiguous regex:', path); exportCache.set(cacheKey, null); return null; } log('cache miss', cacheKey, 'for path', path); exportMap = ExportMap.parse(path, content, context); // ambiguous modules return null if (exportMap == null) return null; exportMap.mtime = stats.mtime; exportCache.set(cacheKey, exportMap); return exportMap; }; ExportMap.parse = function (path, content, context) { var m = new ExportMap(path); try { var ast = (0, _parse2.default)(path, content, context); } catch (err) { log('parse error:', path, err); m.errors.push(err); return m; // can't continue } if (!unambiguous.isModule(ast)) return null; const docstyle = context.settings && context.settings['import/docstyle'] || ['jsdoc']; const docStyleParsers = {}; docstyle.forEach(style => { docStyleParsers[style] = availableDocStyleParsers[style]; }); // attempt to collect module doc if (ast.comments) { ast.comments.some(c => { if (c.type !== 'Block') return false; try { const doc = _doctrine2.default.parse(c.value, { unwrap: true }); if (doc.tags.some(t => t.title === 'module')) { m.doc = doc; return true; } } catch (err) {/* ignore */} return false; }); } const namespaces = new Map(); function remotePath(value) { return _resolve2.default.relative(value, path, context.settings); } function resolveImport(value) { const rp = remotePath(value); if (rp == null) return null; return ExportMap.for(childContext(rp, context)); } function getNamespace(identifier) { if (!namespaces.has(identifier.name)) return; return function () { return resolveImport(namespaces.get(identifier.name)); }; } function addNamespace(object, identifier) { const nsfn = getNamespace(identifier); if (nsfn) { Object.defineProperty(object, 'namespace', { get: nsfn }); } return object; } function captureDependency(declaration) { if (declaration.source == null) return null; if (declaration.importKind === 'type') return null; // skip Flow type imports const importedSpecifiers = new Set(); const supportedTypes = new Set(['ImportDefaultSpecifier', 'ImportNamespaceSpecifier']); let hasImportedType = false; if (declaration.specifiers) { declaration.specifiers.forEach(specifier => { const isType = specifier.importKind === 'type'; hasImportedType = hasImportedType || isType; if (supportedTypes.has(specifier.type) && !isType) { importedSpecifiers.add(specifier.type); } if (specifier.type === 'ImportSpecifier' && !isType) { importedSpecifiers.add(specifier.imported.name); } }); } // only Flow types were imported if (hasImportedType && importedSpecifiers.size === 0) return null; const p = remotePath(declaration.source.value); if (p == null) return null; const existing = m.imports.get(p); if (existing != null) return existing.getter; const getter = thunkFor(p, context); m.imports.set(p, { getter, source: { // capturing actual node reference holds full AST in memory! value: declaration.source.value, loc: declaration.source.loc }, importedSpecifiers }); return getter; } const source = makeSourceCode(content, ast); ast.body.forEach(function (n) { if (n.type === 'ExportDefaultDeclaration') { const exportMeta = captureDoc(source, docStyleParsers, n); if (n.declaration.type === 'Identifier') { addNamespace(exportMeta, n.declaration); } m.namespace.set('default', exportMeta); return; } if (n.type === 'ExportAllDeclaration') { const getter = captureDependency(n); if (getter) m.dependencies.add(getter); return; } // capture namespaces in case of later export if (n.type === 'ImportDeclaration') { captureDependency(n); let ns; if (n.specifiers.some(s => s.type === 'ImportNamespaceSpecifier' && (ns = s))) { namespaces.set(ns.local.name, n.source.value); } return; } if (n.type === 'ExportNamedDeclaration') { // capture declaration if (n.declaration != null) { switch (n.declaration.type) { case 'FunctionDeclaration': case 'ClassDeclaration': case 'TypeAlias': // flowtype with babel-eslint parser case 'InterfaceDeclaration': case 'DeclareFunction': case 'TSDeclareFunction': case 'TSEnumDeclaration': case 'TSTypeAliasDeclaration': case 'TSInterfaceDeclaration': case 'TSAbstractClassDeclaration': case 'TSModuleDeclaration': m.namespace.set(n.declaration.id.name, captureDoc(source, docStyleParsers, n)); break; case 'VariableDeclaration': n.declaration.declarations.forEach(d => recursivePatternCapture(d.id, id => m.namespace.set(id.name, captureDoc(source, docStyleParsers, d, n)))); break; } } const nsource = n.source && n.source.value; n.specifiers.forEach(s => { const exportMeta = {}; let local; switch (s.type) { case 'ExportDefaultSpecifier': if (!n.source) return; local = 'default'; break; case 'ExportNamespaceSpecifier': m.namespace.set(s.exported.name, Object.defineProperty(exportMeta, 'namespace', { get() { return resolveImport(nsource); } })); return; case 'ExportSpecifier': if (!n.source) { m.namespace.set(s.exported.name, addNamespace(exportMeta, s.local)); return; } // else falls through default: local = s.local.name; break; } // todo: JSDoc m.reexports.set(s.exported.name, { local, getImport: () => resolveImport(nsource) }); }); } // This doesn't declare anything, but changes what's being exported. if (n.type === 'TSExportAssignment') { const moduleDecls = ast.body.filter(bodyNode => bodyNode.type === 'TSModuleDeclaration' && bodyNode.id.name === n.expression.name); moduleDecls.forEach(moduleDecl => { if (moduleDecl && moduleDecl.body && moduleDecl.body.body) { moduleDecl.body.body.forEach(moduleBlockNode => { // Export-assignment exports all members in the namespace, explicitly exported or not. const exportedDecl = moduleBlockNode.type === 'ExportNamedDeclaration' ? moduleBlockNode.declaration : moduleBlockNode; if (exportedDecl.type === 'VariableDeclaration') { exportedDecl.declarations.forEach(decl => recursivePatternCapture(decl.id, id => m.namespace.set(id.name, captureDoc(source, docStyleParsers, decl, exportedDecl, moduleBlockNode)))); } else { m.namespace.set(exportedDecl.id.name, captureDoc(source, docStyleParsers, moduleBlockNode)); } }); } }); } }); return m; }; /** * The creation of this closure is isolated from other scopes * to avoid over-retention of unrelated variables, which has * caused memory leaks. 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sometimes legacy support isn't _that_ hard... right? */ function makeSourceCode(text, ast) { if (_eslint.SourceCode.length > 1) { // ESLint 3 return new _eslint.SourceCode(text, ast); } else { // ESLint 4, 5 return new _eslint.SourceCode({ text, ast }); } } //# 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fs from 'fs'\n\nimport doctrine from 'doctrine'\n\nimport debug from 'debug'\n\nimport { SourceCode } from 'eslint'\n\nimport parse from 'eslint-module-utils/parse'\nimport resolve from 'eslint-module-utils/resolve'\nimport isIgnored, { hasValidExtension } from 'eslint-module-utils/ignore'\n\nimport { hashObject } from 'eslint-module-utils/hash'\nimport * as unambiguous from 'eslint-module-utils/unambiguous'\n\nconst log = debug('eslint-plugin-import:ExportMap')\n\nconst exportCache = new Map()\n\nexport default class ExportMap {\n  constructor(path) {\n    this.path = path\n    this.namespace = new Map()\n    // todo: restructure to key on path, value is resolver + map of names\n    this.reexports = new Map()\n    /**\n     * star-exports\n     * @type {Set} of () => ExportMap\n     */\n    this.dependencies = new Set()\n    /**\n     * dependencies of this module that are not explicitly re-exported\n     * @type {Map} from path = () => ExportMap\n     */\n    this.imports = new Map()\n    this.errors = []\n  }\n\n  get hasDefault() { return this.get('default') != null } // stronger than this.has\n\n  get size() {\n    let size = this.namespace.size + this.reexports.size\n    this.dependencies.forEach(dep => {\n      const d = dep()\n      // CJS / ignored dependencies won't exist (#717)\n      if (d == null) return\n      size += d.size\n    })\n    return size\n  }\n\n  /**\n   * Note that this does not check explicitly re-exported names for existence\n   * in the base namespace, but it will expand all `export * from '...'` exports\n   * if not found in the explicit namespace.\n   * @param  {string}  name\n   * @return {Boolean} true if `name` is exported by this module.\n   */\n  has(name) {\n    if (this.namespace.has(name)) return true\n    if (this.reexports.has(name)) return true\n\n    // default exports must be explicitly re-exported (#328)\n    if (name !== 'default') {\n      for (let dep of this.dependencies) {\n        let innerMap = dep()\n\n        // todo: report as unresolved?\n        if (!innerMap) continue\n\n        if (innerMap.has(name)) return true\n      }\n    }\n\n    return false\n  }\n\n  /**\n   * ensure that imported name fully resolves.\n   * @param  {[type]}  name [description]\n   * @return {Boolean}      [description]\n   */\n  hasDeep(name) {\n    if (this.namespace.has(name)) return { found: true, path: [this] }\n\n    if (this.reexports.has(name)) {\n      const reexports = this.reexports.get(name)\n          , imported = reexports.getImport()\n\n      // if import is ignored, return explicit 'null'\n      if (imported == null) return { found: true, path: [this] }\n\n      // safeguard against cycles, only if name matches\n      if (imported.path === this.path && reexports.local === name) {\n        return { found: false, path: [this] }\n      }\n\n      const deep = imported.hasDeep(reexports.local)\n      deep.path.unshift(this)\n\n      return deep\n    }\n\n\n    // default exports must be explicitly re-exported (#328)\n    if (name !== 'default') {\n      for (let dep of this.dependencies) {\n        let innerMap = dep()\n        // todo: report as unresolved?\n        if (!innerMap) continue\n\n        // safeguard against cycles\n        if (innerMap.path === this.path) continue\n\n        let innerValue = innerMap.hasDeep(name)\n        if (innerValue.found) {\n          innerValue.path.unshift(this)\n          return innerValue\n        }\n      }\n    }\n\n    return { found: false, path: [this] }\n  }\n\n  get(name) {\n    if (this.namespace.has(name)) return this.namespace.get(name)\n\n    if (this.reexports.has(name)) {\n      const reexports = this.reexports.get(name)\n          , imported = reexports.getImport()\n\n      // if import is ignored, return explicit 'null'\n      if (imported == null) return null\n\n      // safeguard against cycles, only if name matches\n      if (imported.path === this.path && reexports.local === name) return undefined\n\n      return imported.get(reexports.local)\n    }\n\n    // default exports must be explicitly re-exported (#328)\n    if (name !== 'default') {\n      for (let dep of this.dependencies) {\n        let innerMap = dep()\n        // todo: report as unresolved?\n        if (!innerMap) continue\n\n        // safeguard against cycles\n        if (innerMap.path === this.path) continue\n\n        let innerValue = innerMap.get(name)\n        if (innerValue !== undefined) return innerValue\n      }\n    }\n\n    return undefined\n  }\n\n  forEach(callback, thisArg) {\n    this.namespace.forEach((v, n) =>\n      callback.call(thisArg, v, n, this))\n\n    this.reexports.forEach((reexports, name) => {\n      const reexported = reexports.getImport()\n      // can't look up meta for ignored re-exports (#348)\n      callback.call(thisArg, reexported && reexported.get(reexports.local), name, this)\n    })\n\n    this.dependencies.forEach(dep => {\n      const d = dep()\n      // CJS / ignored dependencies won't exist (#717)\n      if (d == null) return\n\n      d.forEach((v, n) =>\n        n !== 'default' && callback.call(thisArg, v, n, this))\n    })\n  }\n\n  // todo: keys, values, entries?\n\n  reportErrors(context, declaration) {\n    context.report({\n      node: declaration.source,\n      message: `Parse errors in imported module '${declaration.source.value}': ` +\n                  `${this.errors\n                        .map(e => `${e.message} (${e.lineNumber}:${e.column})`)\n                        .join(', ')}`,\n    })\n  }\n}\n\n/**\n * parse docs from the first node that has leading comments\n */\nfunction captureDoc(source, docStyleParsers, ...nodes) {\n  const metadata = {}\n\n  // 'some' short-circuits on first 'true'\n  nodes.some(n => {\n    try {\n\n      let leadingComments\n\n      // n.leadingComments is legacy `attachComments` behavior\n      if ('leadingComments' in n) {\n        leadingComments = n.leadingComments\n      } else if (n.range) {\n        leadingComments = source.getCommentsBefore(n)\n      }\n\n      if (!leadingComments || leadingComments.length === 0) return false\n\n      for (let name in docStyleParsers) {\n        const doc = docStyleParsers[name](leadingComments)\n        if (doc) {\n          metadata.doc = doc\n        }\n      }\n\n      return true\n    } catch (err) {\n      return false\n    }\n  })\n\n  return metadata\n}\n\nconst availableDocStyleParsers = {\n  jsdoc: captureJsDoc,\n  tomdoc: captureTomDoc,\n}\n\n/**\n * parse JSDoc from leading comments\n * @param  {...[type]} comments [description]\n * @return {{doc: object}}\n */\nfunction captureJsDoc(comments) {\n  let doc\n\n  // capture XSDoc\n  comments.forEach(comment => {\n    // skip non-block comments\n    if (comment.type !== 'Block') return\n    try {\n      doc = doctrine.parse(comment.value, { unwrap: true })\n    } catch (err) {\n      /* don't care, for now? maybe add to `errors?` */\n    }\n  })\n\n  return doc\n}\n\n/**\n  * parse TomDoc section from comments\n  */\nfunction captureTomDoc(comments) {\n  // collect lines up to first paragraph break\n  const lines = []\n  for (let i = 0; i < comments.length; i++) {\n    const comment = comments[i]\n    if (comment.value.match(/^\\s*$/)) break\n    lines.push(comment.value.trim())\n  }\n\n  // return doctrine-like object\n  const statusMatch = lines.join(' ').match(/^(Public|Internal|Deprecated):\\s*(.+)/)\n  if (statusMatch) {\n    return {\n      description: statusMatch[2],\n      tags: [{\n        title: statusMatch[1].toLowerCase(),\n        description: statusMatch[2],\n      }],\n    }\n  }\n}\n\nExportMap.get = function (source, context) {\n  const path = resolve(source, context)\n  if (path == null) return null\n\n  return ExportMap.for(childContext(path, context))\n}\n\nExportMap.for = function (context) {\n  const { path } = context\n\n  const cacheKey = hashObject(context).digest('hex')\n  let exportMap = exportCache.get(cacheKey)\n\n  // return cached ignore\n  if (exportMap === null) return null\n\n  const stats = fs.statSync(path)\n  if (exportMap != null) {\n    // date equality check\n    if (exportMap.mtime - stats.mtime === 0) {\n      return exportMap\n    }\n    // future: check content equality?\n  }\n\n  // check valid extensions first\n  if (!hasValidExtension(path, context)) {\n    exportCache.set(cacheKey, null)\n    return null\n  }\n\n  // check for and cache ignore\n  if (isIgnored(path, context)) {\n    log('ignored path due to ignore settings:', path)\n    exportCache.set(cacheKey, null)\n    return null\n  }\n\n  const content = fs.readFileSync(path, { encoding: 'utf8' })\n\n  // check for and cache unambigious modules\n  if (!unambiguous.test(content)) {\n    log('ignored path due to unambiguous regex:', path)\n    exportCache.set(cacheKey, null)\n    return null\n  }\n\n  log('cache miss', cacheKey, 'for path', path)\n  exportMap = ExportMap.parse(path, content, context)\n\n  // ambiguous modules return null\n  if (exportMap == null) return null\n\n  exportMap.mtime = stats.mtime\n\n  exportCache.set(cacheKey, exportMap)\n  return exportMap\n}\n\n\nExportMap.parse = function (path, content, context) {\n  var m = new ExportMap(path)\n\n  try {\n    var ast = parse(path, content, context)\n  } catch (err) {\n    log('parse error:', path, err)\n    m.errors.push(err)\n    return m // can't continue\n  }\n\n  if (!unambiguous.isModule(ast)) return null\n\n  const docstyle = (context.settings && context.settings['import/docstyle']) || ['jsdoc']\n  const docStyleParsers = {}\n  docstyle.forEach(style => {\n    docStyleParsers[style] = availableDocStyleParsers[style]\n  })\n\n  // attempt to collect module doc\n  if (ast.comments) {\n    ast.comments.some(c => {\n      if (c.type !== 'Block') return false\n      try {\n        const doc = doctrine.parse(c.value, { unwrap: true })\n        if (doc.tags.some(t => t.title === 'module')) {\n          m.doc = doc\n          return true\n        }\n      } catch (err) { /* ignore */ }\n      return false\n    })\n  }\n\n  const namespaces = new Map()\n\n  function remotePath(value) {\n    return resolve.relative(value, path, context.settings)\n  }\n\n  function resolveImport(value) {\n    const rp = remotePath(value)\n    if (rp == null) return null\n    return ExportMap.for(childContext(rp, context))\n  }\n\n  function getNamespace(identifier) {\n    if (!namespaces.has(identifier.name)) return\n\n    return function () {\n      return resolveImport(namespaces.get(identifier.name))\n    }\n  }\n\n  function addNamespace(object, identifier) {\n    const nsfn = getNamespace(identifier)\n    if (nsfn) {\n      Object.defineProperty(object, 'namespace', { get: nsfn })\n    }\n\n    return object\n  }\n\n  function captureDependency(declaration) {\n    if (declaration.source == null) return null\n    if (declaration.importKind === 'type') return null // skip Flow type imports\n    const importedSpecifiers = new Set()\n    const supportedTypes = new Set(['ImportDefaultSpecifier', 'ImportNamespaceSpecifier'])\n    let hasImportedType = false\n    if (declaration.specifiers) {\n      declaration.specifiers.forEach(specifier => {\n        const isType = specifier.importKind === 'type'\n        hasImportedType = hasImportedType || isType\n\n        if (supportedTypes.has(specifier.type) && !isType) {\n          importedSpecifiers.add(specifier.type)\n        }\n        if (specifier.type === 'ImportSpecifier' && !isType) {\n          importedSpecifiers.add(specifier.imported.name)\n        }\n      })\n    }\n\n    // only Flow types were imported\n    if (hasImportedType && importedSpecifiers.size === 0) return null\n\n    const p = remotePath(declaration.source.value)\n    if (p == null) return null\n    const existing = m.imports.get(p)\n    if (existing != null) return existing.getter\n\n    const getter = thunkFor(p, context)\n    m.imports.set(p, {\n      getter,\n      source: {  // capturing actual node reference holds full AST in memory!\n        value: declaration.source.value,\n        loc: declaration.source.loc,\n      },\n      importedSpecifiers,\n    })\n    return getter\n  }\n\n  const source = makeSourceCode(content, ast)\n\n  ast.body.forEach(function (n) {\n\n    if (n.type === 'ExportDefaultDeclaration') {\n      const exportMeta = captureDoc(source, docStyleParsers, n)\n      if (n.declaration.type === 'Identifier') {\n        addNamespace(exportMeta, n.declaration)\n      }\n      m.namespace.set('default', exportMeta)\n      return\n    }\n\n    if (n.type === 'ExportAllDeclaration') {\n      const getter = captureDependency(n)\n      if (getter) m.dependencies.add(getter)\n      return\n    }\n\n    // capture namespaces in case of later export\n    if (n.type === 'ImportDeclaration') {\n      captureDependency(n)\n      let ns\n      if (n.specifiers.some(s => s.type === 'ImportNamespaceSpecifier' && (ns = s))) {\n        namespaces.set(ns.local.name, n.source.value)\n      }\n      return\n    }\n\n    if (n.type === 'ExportNamedDeclaration') {\n      // capture declaration\n      if (n.declaration != null) {\n        switch (n.declaration.type) {\n          case 'FunctionDeclaration':\n          case 'ClassDeclaration':\n          case 'TypeAlias': // flowtype with babel-eslint parser\n          case 'InterfaceDeclaration':\n          case 'DeclareFunction':\n          case 'TSDeclareFunction':\n          case 'TSEnumDeclaration':\n          case 'TSTypeAliasDeclaration':\n          case 'TSInterfaceDeclaration':\n          case 'TSAbstractClassDeclaration':\n          case 'TSModuleDeclaration':\n            m.namespace.set(n.declaration.id.name, captureDoc(source, docStyleParsers, n))\n            break\n          case 'VariableDeclaration':\n            n.declaration.declarations.forEach((d) =>\n              recursivePatternCapture(d.id,\n                id => m.namespace.set(id.name, captureDoc(source, docStyleParsers, d, n))))\n            break\n        }\n      }\n\n      const nsource = n.source && n.source.value\n      n.specifiers.forEach((s) => {\n        const exportMeta = {}\n        let local\n\n        switch (s.type) {\n          case 'ExportDefaultSpecifier':\n            if (!n.source) return\n            local = 'default'\n            break\n          case 'ExportNamespaceSpecifier':\n            m.namespace.set(s.exported.name, Object.defineProperty(exportMeta, 'namespace', {\n              get() { return resolveImport(nsource) },\n            }))\n            return\n          case 'ExportSpecifier':\n            if (!n.source) {\n              m.namespace.set(s.exported.name, addNamespace(exportMeta, s.local))\n              return\n            }\n            // else falls through\n          default:\n            local = s.local.name\n            break\n        }\n\n        // todo: JSDoc\n        m.reexports.set(s.exported.name, { local, getImport: () => resolveImport(nsource) })\n      })\n    }\n\n    // This doesn't declare anything, but changes what's being exported.\n    if (n.type === 'TSExportAssignment') {\n      const moduleDecls = ast.body.filter((bodyNode) =>\n        bodyNode.type === 'TSModuleDeclaration' && bodyNode.id.name === n.expression.name\n      )\n      moduleDecls.forEach((moduleDecl) => {\n        if (moduleDecl && moduleDecl.body && moduleDecl.body.body) {\n          moduleDecl.body.body.forEach((moduleBlockNode) => {\n            // Export-assignment exports all members in the namespace, explicitly exported or not.\n            const exportedDecl = moduleBlockNode.type === 'ExportNamedDeclaration' ?\n              moduleBlockNode.declaration :\n              moduleBlockNode\n\n            if (exportedDecl.type === 'VariableDeclaration') {\n              exportedDecl.declarations.forEach((decl) =>\n                recursivePatternCapture(decl.id,(id) => m.namespace.set(\n                  id.name,\n                  captureDoc(source, docStyleParsers, decl, exportedDecl, moduleBlockNode))\n                )\n              )\n            } else {\n              m.namespace.set(\n                exportedDecl.id.name,\n                captureDoc(source, docStyleParsers, moduleBlockNode))\n            }\n          })\n        }\n      })\n    }\n  })\n\n  return m\n}\n\n/**\n * The creation of this closure is isolated from other scopes\n * to avoid over-retention of unrelated variables, which has\n * caused memory leaks. See #1266.\n */\nfunction thunkFor(p, context) {\n  return () => ExportMap.for(childContext(p, context))\n}\n\n\n/**\n * Traverse a pattern/identifier node, calling 'callback'\n * for each leaf identifier.\n * @param  {node}   pattern\n * @param  {Function} callback\n * @return {void}\n */\nexport function recursivePatternCapture(pattern, callback) {\n  switch (pattern.type) {\n    case 'Identifier': // base case\n      callback(pattern)\n      break\n\n    case 'ObjectPattern':\n      pattern.properties.forEach(p => {\n        recursivePatternCapture(p.value, callback)\n      })\n      break\n\n    case 'ArrayPattern':\n      pattern.elements.forEach((element) => {\n        if (element == null) return\n        recursivePatternCapture(element, callback)\n      })\n      break\n\n    case 'AssignmentPattern':\n      callback(pattern.left)\n      break\n  }\n}\n\n/**\n * don't hold full context object in memory, just grab what we need.\n */\nfunction childContext(path, context) {\n  const { settings, parserOptions, parserPath } = context\n  return {\n    settings,\n    parserOptions,\n    parserPath,\n    path,\n  }\n}\n\n\n/**\n * sometimes legacy support isn't _that_ hard... right?\n */\nfunction makeSourceCode(text, ast) {\n  if (SourceCode.length > 1) {\n    // ESLint 3\n    return new SourceCode(text, ast)\n  } else {\n    // ESLint 4, 5\n    return new SourceCode({ text, ast })\n  }\n}\n"]}