stdout event ?

[smolleyes]

hi

if i want to use something like thsi for exemple

pv file.tgz | tar xzf - -C target_directory

wich return in live

1.16MB 0:00:20 [6.06MB/s] [==================> ] 55% ETA 0:00:37

how can i yield a spawn and get the live output from stdout or stderr like normal spawn ?

thanks

[smolleyes]

i tried

var co = require('co')
var spawn = require('co-child-process')
var fs = require('fs')

co(function* () {
  var t = yield unzip()
})

function * unzip() {
   var stream = fs.createReadStream("/home/sylvain/Documents/imgtmp/photos.zip")
   var out = yield spawn('pv',['-','|','unzip-stream','/tmp']).pump(stream)
}

where unzip stream is an alias :
alias unzip-stream="python -c \"import zipfile,sys,StringIO;zipfile.ZipFile(StringIO.StringIO(sys.stdin.read())).extractall(sys.argv[1] if len(sys.argv) == 2 else '.')\""

running this command from command line works very well :

pv /home/sylvain/Documents/imgtmp/photos.zip | unzip-stream /tmp/test

but from the node code i have ...

/tmp/node_modules/co-child-process/lib/index.js:53
    function onoutdata(chunk) {
                      ^

RangeError: Invalid string length
    at Socket.onoutdata (/tmp/node_modules/co-child-process/lib/index.js:53:23)
    at emitOne (events.js:90:13)
    at Socket.emit (events.js:182:7)
    at readableAddChunk (_stream_readable.js:153:18)
    at Socket.Readable.push (_stream_readable.js:111:10)
    at Pipe.onread (net.js:529:20)

[NickHeiner]

I'm not sure what the problem is, and I don't have a whole lot of time to investigate. You may be better off just using child_process directly.