device_home/node_modules/find-up/index.js

   1 'use strict';
   2 const path = require('path');
   3 const locatePath = require('locate-path');
   4
   5 module.exports = (filename, opts = {}) => {
   6         const startDir = path.resolve(opts.cwd || '');
   7         const {root} = path.parse(startDir);
   8
   9         const filenames = [].concat(filename);
  10
  11         return new Promise(resolve => {
  12                 (function find(dir) {
  13                         locatePath(filenames, {cwd: dir}).then(file => {
  14                                 if (file) {
  15                                         resolve(path.join(dir, file));
  16                                 } else if (dir === root) {
  17                                         resolve(null);
  18                                 } else {
  19                                         find(path.dirname(dir));
  20                                 }
  21                         });
  22                 })(startDir);
  23         });
  24 };
  25
  26 module.exports.sync = (filename, opts = {}) => {
  27         let dir = path.resolve(opts.cwd || '');
  28         const {root} = path.parse(dir);
  29
  30         const filenames = [].concat(filename);
  31
  32         // eslint-disable-next-line no-constant-condition
  33         while (true) {
  34                 const file = locatePath.sync(filenames, {cwd: dir});
  35
  36                 if (file) {
  37                         return path.join(dir, file);
  38                 }
  39
  40                 if (dir === root) {
  41                         return null;
  42                 }
  43
  44                 dir = path.dirname(dir);
  45         }
  46 };