| 'use strict'; |
| |
| var path = require('path'); |
| var which = require('which'); |
| var LRU = require('lru-cache'); |
| |
| var commandCache = new LRU({ max: 50, maxAge: 30 * 1000 }); // Cache just for 30sec |
| |
| function resolveCommand(command, noExtension) { |
| var resolved; |
| |
| noExtension = !!noExtension; |
| resolved = commandCache.get(command + '!' + noExtension); |
| |
| // Check if its resolved in the cache |
| if (commandCache.has(command)) { |
| return commandCache.get(command); |
| } |
| |
| try { |
| resolved = !noExtension ? |
| which.sync(command) : |
| which.sync(command, { pathExt: path.delimiter + (process.env.PATHEXT || '') }); |
| } catch (e) { /* empty */ } |
| |
| commandCache.set(command + '!' + noExtension, resolved); |
| |
| return resolved; |
| } |
| |
| module.exports = resolveCommand; |