Guaranteed read and write streams to the terminal
This micro module provides
tty.WriteStream instances to the
user's terminal, even when the regular
stdout streams are already
being piped to other commands.
$ npm install ttys
Suppose you want to provide a
curl | node command to your users.
The script could be something as simple as printing "Hello World" and exiting.
// script.jsconsole.log'Hello World'
Place that on your websever and have your users invoke the command:
$ curl aweso.me/script.js | nodeHello World
Now suppose that you wanted to alter
script.js to prompt the user for their
name, so that you can personalize it a little bit.
The problem is that
process.stdin is used up because it gets piped from the curl
command, and ends before node runs the script. If you try to call
process.stdin.resume() and listen for "data" and "end" events, you will see that
the "end" event will be fired immediately.
ttys, you can get guaranteed access to a
stdin readable stream and
stdout writable stream. It's easy!
var ttys = require'ttys'var readline = require'readline'var i = readlinecreateInterfacettysstdin ttysstdoutiquestion'What is your name? 'console.log'Hello %s' nameiclosettysstdinpause
Now when your users run the script, then they will be prompted as you would expect:
$ curl aweso.me/script.js | nodeWhat is your name? NathanHello Nathan
(The MIT License)
Copyright (c) 2012 Nathan Rajlich <email@example.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.