| '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 _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 => size += dep().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}:${e.column})`).join(', ')}` |
| }); |
| } |
| } |
| |
| exports.default = ExportMap; /** |
| * parse docs from the first node that has leading comments |
| * @param {...[type]} nodes [description] |
| * @return {{doc: object}} |
| */ |
| |
| function captureDoc(docStyleParsers) { |
| const metadata = {}, |
| nodes = Array.prototype.slice.call(arguments, 1); |
| |
| // 'some' short-circuits on first 'true' |
| nodes.some(n => { |
| if (!n.leadingComments) return false; |
| |
| for (let name in docStyleParsers) { |
| const doc = docStyleParsers[name](n.leadingComments); |
| if (doc) { |
| metadata.doc = doc; |
| } |
| } |
| |
| return true; |
| }); |
| |
| return metadata; |
| } |
| |
| const availableDocStyleParsers = { |
| jsdoc: captureJsDoc, |
| tomdoc: captureTomDoc |
| |
| /** |
| * parse JSDoc from leading comments |
| * @param {...[type]} comments [description] |
| * @return {{doc: object}} |
| */ |
| };function captureJsDoc(comments) { |
| let doc; |
| |
| // capture XSDoc |
| comments.forEach(comment => { |
| // skip non-block comments |
| if (comment.value.slice(0, 4) !== '*\n *') return; |
| try { |
| doc = _doctrine2.default.parse(comment.value, { unwrap: true }); |
| } catch (err) { |
| /* don't care, for now? maybe add to `errors?` */ |
| } |
| }); |
| |
| return doc; |
| } |
| |
| /** |
| * parse TomDoc section from comments |
| */ |
| function captureTomDoc(comments) { |
| // collect lines up to first paragraph break |
| const lines = []; |
| for (let i = 0; i < comments.length; i++) { |
| const comment = comments[i]; |
| if (comment.value.match(/^\s*$/)) 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; |
| } |
| |
| const content = _fs2.default.readFileSync(path, { encoding: 'utf8' }); |
| |
| // check for and cache ignore |
| if ((0, _ignore2.default)(path, context) || !unambiguous.test(content)) { |
| log('ignored path due to unambiguous regex or ignore settings:', 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; |
| |
| 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 = () => ExportMap.for(childContext(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 |
| } |
| }); |
| return getter; |
| } |
| |
| ast.body.forEach(function (n) { |
| |
| if (n.type === 'ExportDefaultDeclaration') { |
| const exportMeta = captureDoc(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 'TSEnumDeclaration': |
| case 'TSInterfaceDeclaration': |
| case 'TSAbstractClassDeclaration': |
| case 'TSModuleDeclaration': |
| m.namespace.set(n.declaration.id.name, captureDoc(docStyleParsers, n)); |
| break; |
| case 'VariableDeclaration': |
| n.declaration.declarations.forEach(d => recursivePatternCapture(d.id, id => m.namespace.set(id.name, captureDoc(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) }); |
| }); |
| } |
| }); |
| |
| return m; |
| }; |
| |
| /** |
| * Traverse a pattern/identifier node, calling 'callback' |
| * for each leaf identifier. |
| * @param {node} pattern |
| * @param {Function} callback |
| * @return {void} |
| */ |
| function recursivePatternCapture(pattern, callback) { |
| switch (pattern.type) { |
| case 'Identifier': |
| // base case |
| callback(pattern); |
| break; |
| |
| case 'ObjectPattern': |
| pattern.properties.forEach(p => { |
| recursivePatternCapture(p.value, callback); |
| }); |
| break; |
| |
| case 'ArrayPattern': |
| pattern.elements.forEach(element => { |
| if (element == null) return; |
| recursivePatternCapture(element, callback); |
| }); |
| break; |
| } |
| } |
| |
| /** |
| * don't hold full context object in memory, just grab what we need. |
| */ |
| function childContext(path, context) { |
| const settings = context.settings, |
| parserOptions = context.parserOptions, |
| parserPath = context.parserPath; |
| |
| return { |
| settings, |
| parserOptions, |
| parserPath, |
| path |
| }; |
| } |
| //# 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fs from 'fs'\n\nimport doctrine from 'doctrine'\n\nimport debug from 'debug'\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 => size += dep().size)\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}:${e.column})`)\n                        .join(', ')}`,\n    })\n  }\n}\n\n/**\n * parse docs from the first node that has leading comments\n * @param  {...[type]} nodes [description]\n * @return {{doc: object}}\n */\nfunction captureDoc(docStyleParsers) {\n  const metadata = {}\n       , nodes = Array.prototype.slice.call(arguments, 1)\n\n  // 'some' short-circuits on first 'true'\n  nodes.some(n => {\n    if (!n.leadingComments) return false\n\n    for (let name in docStyleParsers) {\n      const doc = docStyleParsers[name](n.leadingComments)\n      if (doc) {\n        metadata.doc = doc\n      }\n    }\n\n    return true\n  })\n\n  return metadata\n}\n\nconst availableDocStyleParsers = {\n  jsdoc: captureJsDoc,\n  tomdoc: captureTomDoc,\n}\n\n/**\n * parse JSDoc from leading comments\n * @param  {...[type]} comments [description]\n * @return {{doc: object}}\n */\nfunction captureJsDoc(comments) {\n  let doc\n\n  // capture XSDoc\n  comments.forEach(comment => {\n    // skip non-block comments\n    if (comment.value.slice(0, 4) !== '*\\n *') return\n    try {\n      doc = doctrine.parse(comment.value, { unwrap: true })\n    } catch (err) {\n      /* don't care, for now? maybe add to `errors?` */\n    }\n  })\n\n  return doc\n}\n\n/**\n  * parse TomDoc section from comments\n  */\nfunction captureTomDoc(comments) {\n  // collect lines up to first paragraph break\n  const lines = []\n  for (let i = 0; i < comments.length; i++) {\n    const comment = comments[i]\n    if (comment.value.match(/^\\s*$/)) 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  const content = fs.readFileSync(path, { encoding: 'utf8' })\n\n  // check for and cache ignore\n  if (isIgnored(path, context) || !unambiguous.test(content)) {\n    log('ignored path due to unambiguous regex or ignore settings:', 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\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 = () => ExportMap.for(childContext(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    })\n    return getter\n  }\n\n\n  ast.body.forEach(function (n) {\n\n    if (n.type === 'ExportDefaultDeclaration') {\n      const exportMeta = captureDoc(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 'TSEnumDeclaration':\n          case 'TSInterfaceDeclaration':\n          case 'TSAbstractClassDeclaration':\n          case 'TSModuleDeclaration':\n            m.namespace.set(n.declaration.id.name, captureDoc(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(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\n  return m\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}\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"]} |