// tslint:disable: only-arrow-functions
// https://gist.github.com/pguillory/729616
import path from 'path'
const appRootDir = require('app-root-dir').get()
export const hook_stdout = () => {
const target: string = path.join(appRootDir, 'logstd.txt')
const log_file = require('fs').createWriteStream(target, { flags: 'w' })
function hook_stream(stream, callback) {
const old_write = stream.write
stream.write = (function(write) {
return function(string, encoding, fd) {
write.apply(stream, arguments) // comments this line if you don't want output in the console
callback(string, encoding, fd)
}
})(stream.write)
return function() {
stream.write = old_write
}
}
const unhook_stdout = hook_stream(process.stdout, function(str, encoding, fd) {
log_file.write(str, encoding)
})
const unhook_stderr = hook_stream(process.stderr, function(str, encoding, fd) {
log_file.write(str, encoding)
})
return {
unhook_stdout,
unhook_stderr,
}
}
