node-which
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node-which
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			#!/usr/bin/env node
			var which = require("../")
			if (process.argv.length < 3)
			usage()

			function usage () {
			console.error('usage: which [-as] program ...')
			process.exit(1)
			}

			var all = false
			var silent = false
			var dashdash = false
			var args = process.argv.slice(2).filter(function (arg) {
			if (dashdash \|\| !/^-/.test(arg))
			return true

			if (arg === '--') {
			dashdash = true
			return false
			}

			var flags = arg.substr(1).split('')
			for (var f = 0; f < flags.length; f++) {
			var flag = flags[f]
			switch (flag) {
			case 's':
			silent = true
			break
			case 'a':
			all = true
			break
			default:
			console.error('which: illegal option -- ' + flag)
			usage()
			}
			}
			return false
			})

			process.exit(args.reduce(function (pv, current) {
			try {
			var f = which.sync(current, { all: all })
			if (all)
			f = f.join('\n')
			if (!silent)
			console.log(f)
			return pv;
			} catch (e) {
			return 1;
			}
			}, 0))