fix(tsConfig): path mapping by filing-cabinet

A PR pending in filingc-cabinet should be merged and published before
this to be merged. REF: dependents/node-filing-cabinet#100

README.md

@@ -44,6 +44,7 @@ var list = dependencyTree.toList({
 * `requireConfig`: path to a requirejs config for AMD modules (allows for the result of aliased module paths)
 * `webpackConfig`: path to a webpack config for aliased modules
 * `tsConfig`: path to a typescript config (or a preloaded object representing the typescript config)
+* `tsConfigPath`: a (virtual) path to typescript config file when `tsConfig` option is given as an object, not a string. Needed to calculate [Path Mapping](https://www.typescriptlang.org/docs/handbook/module-resolution.html#path-mapping). If not given when `tsConfig` is an object, **Path Mapping** is ignored. This is not needed when `tsConfig` is given as a path string.
 * `nodeModulesConfig`: config for resolving entry file for node_modules
 * `visited`: object used for avoiding redundant subtree generations via memoization.
 * `nonExistent`: array used for storing the list of partial paths that do not exist

index.js

@@ -25,7 +25,7 @@ const Config = require('./lib/Config');
  * @param {Boolean} [options.noTypeDefinitions] For TypeScript imports, whether to resolve to `*.js` instead of `*.d.ts`.
  * @return {Object}
  */
-module.exports = function(options) {
+module.exports = function (options) {
   const config = new Config(options);
 
   if (!fs.existsSync(config.filename)) {
@@ -67,7 +67,7 @@ module.exports = function(options) {
  *
  * Params are those of module.exports
  */
-module.exports.toList = function(options) {
+module.exports.toList = function (options) {
   options.isListForm = true;
 
   return module.exports(options);
@@ -81,7 +81,7 @@ module.exports.toList = function(options) {
  * @param  {Config} config
  * @return {Array}
  */
-module.exports._getDependencies = function(config) {
+module.exports._getDependencies = function (config) {
   let dependencies;
   const precinctOptions = config.detectiveConfig;
   precinctOptions.includeCore = false;
@@ -111,6 +111,7 @@ module.exports._getDependencies = function(config) {
       webpackConfig: config.webpackConfig,
       nodeModulesConfig: config.nodeModulesConfig,
       tsConfig: config.tsConfig,
+      tsConfigPath: config.tsConfigPath,
       noTypeDefinitions: config.noTypeDefinitions
     });
 
@@ -158,7 +159,7 @@ function traverse(config) {
   if (config.filter) {
     debug('using filter function to filter out dependencies');
     debug('unfiltered number of dependencies: ' + dependencies.length);
-    dependencies = dependencies.filter(function(filePath) {
+    dependencies = dependencies.filter(function (filePath) {
       return config.filter(filePath, config.filename);
     });
     debug('filtered number of dependencies: ' + dependencies.length);

lib/Config.js

@@ -23,11 +23,13 @@ class Config {
     if (!this.directory) { throw new Error('directory not given'); }
     if (this.filter && typeof this.filter !== 'function') { throw new Error('filter must be a function'); }
 
+    this.tsConfigPath = options.tsConfigPath
     if ('string' === typeof this.tsConfig) {
       debug('preparsing the ts config into an object for performance');
       const ts = require('typescript');
       const tsParsedConfig = ts.readJsonConfigFile(this.tsConfig, ts.sys.readFile);
       const obj = ts.parseJsonSourceFileConfigFileContent(tsParsedConfig, ts.sys, path.dirname(this.tsConfig));
+      this.tsConfigPath = this.tsConfigPath || this.tsConfig
       this.tsConfig = obj.raw;
     }
 
@@ -39,7 +41,7 @@ class Config {
     debug('visited: ', this.visited);
   }
 
-  clone () {
+  clone() {
     return new Config(this);
   }
 }