Reading from stdin at the start of the program

[marlun]

How would I use this but at the same time accept data being passed to this program on stdin?

ls -l | <program>

If I try

process.stdin.pipe(concat(list))

I get the following messge

process.stdin.setRawMode(true)
              ^
TypeError: process.stdin.setRawMode is not a function
    at neatInput (<rest of path>/node_modules/neat-input/index.js:25:17)

[mafintosh]

Fixed in latest neat-input. If you reinstall it should work as expected. If not post the program and I'll try helping :)

[marlun]

It seem to have helped with the error but I'm still a little lost. Hopefully it's an obvious error on my part:

var concat = require('concat-stream')
var diffy = require('diffy')({ fullscreen: true })
var fs = require('fs')
var input = require('diffy/input')()
var Menu = require('menu-string')

var menu

process.stdin.pipe(concat(list))

input.on('keypress', function (ch, key) {
  if (ch === 'q') process.exit()
})

function list (data) {
  var items = data.toString()
    .split('\n')
    .filter(s => s)
    .map(str => ({ text: str }))
  menu = new Menu({
    items: items
  })
  diffy.render(function () {
    return menu.toString()
  })
  menu.on('update', function () {
    diffy.render()
  })
  diffy.render()
}

[mafintosh]

Can you show what input you are piping to it? Prob my fault

[marlun]

I just do ls -l | node index.js, do you want the specific input?

[mafintosh]

where is q coming from in the above example then?

[marlun]

Keyboard? :) I want to be able to do like ls -l | node index.js and then (yet to be implemented) j/k to choose a line and hit ENTER to get it to output that line. The 'q' is only there to make it easy for me to exit by hitting 'q'.

[mafintosh]

When doing ls -l | node index.js stdin of your application is taken over by ls -l. You cannot do both unfortunately :) Another way would be to have index.js spawn ls -l instead, and have stdin be interactive

[marlun]

I was inspired by https://github.com/junegunn/fzf where I can do ls -l | fzf and then filter by writing a string and hit enter.

[mafintosh]

Oh interesting. Maybe there is a way to do it then! Let me take a look tmw

…

On Tue, Jan 2, 2018, 22:59 Martin Lundberg ***@***.***> wrote: I was inspired by https://github.com/junegunn/fzf where I can do ls -l | fzf and then filter by writing a string and hit enter. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAW_VSEkUfKjfjmE2YF-x9zTwZ5sBKQOks5tGqbCgaJpZM4RQHru> .

[marlun]

This might not be a very good solution but what about splitting the program into two parts, one that reads from stdin, saves it to a temporary file and runs a second program in a new process. The new program is given the path to the temporary file which it reads from and shows it in a menu-string. The second program should be able to be interactive :)

I made a first try but this is not working:

index.js

var concat = require('concat-stream')
var exec = require('child_process').exec
var fs = require('fs')
var tmp = require('tmp')

process.stdin.pipe(concat(saveFile))

function saveFile (data) {
  tmp.file(function (err, path, fd, cleanup) {
    if (err) throw err
    fs.writeFile(path, data, function (err) {
      if (err) throw err
      exec('node menu.js ' + path, function (err, stdout, stderr) {
        if (err) throw err
        console.log(stdout)
        cleanup()
      })
    })
  })
}

menu.js

var diffy = require('diffy')({ fullscreen: true })
var fs = require('fs')
var input = require('diffy/input')()
var Menu = require('menu-string')

var menu;

input.on('enter', function () {
  var item = menu.selected
  console.log(item)
})

load(process.argv[2], function (lines) {
  menu = new Menu({
    items: lines
  })
  diffy.render(function () {
    return menu.toString()
  })
  menu.on('update', function () {
    diffy.render()
  })
  diffy.render()
})

function load (path, cb) {
  fs.readFile(path, 'utf8', function (err, data) {
    if (err) throw err
    cb(data.split('\n'))
  })
}

[marlun]

Did you look into this further?