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77 lines
1.9 KiB
77 lines
1.9 KiB
"use strict" |
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var which = require('which') |
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var npmPath = require('npm-path') |
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module.exports = function(cwd) { |
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function npmWhich(cmd, options, fn) { |
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// options is optional |
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if (options instanceof Function) fn = options, options = null |
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options = options || {} |
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options.cwd = options.cwd || cwd |
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options.env = options.env || process.env |
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function curryWhich(opts, fn) { |
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if (opts instanceof Function) fn = opts, opts = null |
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opts = opts || {} |
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return npmWhich(cmd, mixin(opts, options), fn) |
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} |
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curryWhich.sync = function(opts) { |
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opts = opts || {} |
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return npmWhich.sync(cmd, mixin(opts, options)) |
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} |
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if (!(typeof fn === 'function')) return curryWhich |
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if (!options.cwd) return fn(new Error('You must specify a cwd.')) |
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npmPath.get(options, function(err, newPath) { |
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if (err) return fn(err) |
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var oldPath = process.env[npmPath.PATH] |
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process.env[npmPath.PATH] = newPath |
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which(cmd, function(err, result) { |
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process.env[npmPath.PATH] = oldPath |
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fn(err, result) |
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}) |
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}) |
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} |
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npmWhich.sync = function(cmd, options) { |
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options = options || {} |
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options.cwd = options.cwd || cwd |
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options.env = options.env || process.env |
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if (!options.cwd) throw new Error('You must specify a cwd.') |
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var err = null |
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try { |
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var oldPath = process.env[npmPath.PATH] |
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var newPath = npmPath.getSync(options) |
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process.env[npmPath.PATH] = newPath |
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var result = which.sync(cmd) |
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return result |
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} catch(e) { |
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err = e |
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} finally { |
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process.env[npmPath.PATH] = oldPath |
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if (err) throw err |
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} |
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return result |
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} |
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if (arguments.length <= 1) return npmWhich |
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return module.exports().apply(this, arguments) |
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} |
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module.exports.sync = function(cmd, options) { |
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options = options || {} |
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return module.exports(options.cwd).sync(cmd, options) |
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} |
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function mixin(a, b) { |
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for (var key in b) { |
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a[key] = b[key] |
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} |
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return a |
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}
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