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module PursLoader.ChildProcess
( ChildProcess()
, spawn
) where
import Control.Monad.Aff (Aff(), makeAff)
import Control.Monad.Eff (Eff())
import Control.Monad.Eff.Exception (Error())
import Data.Function
foreign import data ChildProcess :: !
spawn :: forall eff. String -> [String] -> Aff (cp :: ChildProcess | eff) String
spawn command args = makeAff $ runFn4 spawnFn command args
foreign import spawnFn """
function spawnFn(command, args, errback, callback) {
return function(){
var child_process = require('child_process');
var process = child_process.spawn(command, args);
var stdout = new Buffer(0);
var stderr = new Buffer(0);
process.stdout.on('data', function(data){
stdout = Buffer.concat([stdout, new Buffer(data)]);
});
process.stderr.on('data', function(data){
stderr = Buffer.concat([stderr, new Buffer(data)]);
});
process.on('close', function(code){
var chalk = require('chalk');
var output = stdout.toString('utf-8');
var error = stderr.toString('utf-8');
if (error.length > 0) {
console.error('\n' + chalk.red('*') + ' ' + error);
}
if (code !== 0) errback(new Error('Process terminated with code ' + code))();
else callback(output)();
});
};
}
""" :: forall eff. Fn4 String
[String]
(Error -> Eff (cp :: ChildProcess | eff) Unit)
(String -> Eff (cp :: ChildProcess | eff) Unit)
(Eff (cp :: ChildProcess | eff) Unit)
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