katoikia-app/web-ui/web-react/node_modules/eslint-plugin-import/lib/ExportMap.js

653 lines
62 KiB
JavaScript

'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();
if (innerMap == null) return { found: true, path: [this]
// 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 unambiguous 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. See #1266.
*/
function thunkFor(p, context) {
return () => ExportMap.for(childContext(p, context));
}
/**
* 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;
case 'AssignmentPattern':
callback(pattern.left);
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
};
}
/**
* 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        if (innerMap == null) return { found: true, path: [this] }\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 unambiguous 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"]}