diff options
Diffstat (limited to 'deps/node/deps/npm/lib/utils/spawn.js')
-rw-r--r-- | deps/node/deps/npm/lib/utils/spawn.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/deps/node/deps/npm/lib/utils/spawn.js b/deps/node/deps/npm/lib/utils/spawn.js new file mode 100644 index 00000000..b164a6ac --- /dev/null +++ b/deps/node/deps/npm/lib/utils/spawn.js @@ -0,0 +1,50 @@ +module.exports = spawn + +var _spawn = require('child_process').spawn +var EventEmitter = require('events').EventEmitter +var npwr = require('./no-progress-while-running.js') + +function willCmdOutput (stdio) { + if (stdio === 'inherit') return true + if (!Array.isArray(stdio)) return false + for (var fh = 1; fh <= 2; ++fh) { + if (stdio[fh] === 'inherit') return true + if (stdio[fh] === 1 || stdio[fh] === 2) return true + } + return false +} + +function spawn (cmd, args, options) { + var cmdWillOutput = willCmdOutput(options && options.stdio) + + if (cmdWillOutput) npwr.startRunning() + var raw = _spawn(cmd, args, options) + var cooked = new EventEmitter() + + raw.on('error', function (er) { + if (cmdWillOutput) npwr.stopRunning() + er.file = cmd + cooked.emit('error', er) + }).on('close', function (code, signal) { + if (cmdWillOutput) npwr.stopRunning() + // Create ENOENT error because Node.js v0.8 will not emit + // an `error` event if the command could not be found. + if (code === 127) { + var er = new Error('spawn ENOENT') + er.code = 'ENOENT' + er.errno = 'ENOENT' + er.syscall = 'spawn' + er.file = cmd + cooked.emit('error', er) + } else { + cooked.emit('close', code, signal) + } + }) + + cooked.stdin = raw.stdin + cooked.stdout = raw.stdout + cooked.stderr = raw.stderr + cooked.kill = function (sig) { return raw.kill(sig) } + + return cooked +} |