114 lines
2.4 KiB
JavaScript
114 lines
2.4 KiB
JavaScript
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module.exports = read
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var readline = require('readline')
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var Mute = require('mute-stream')
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function read (opts, cb) {
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if (opts.num) {
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throw new Error('read() no longer accepts a char number limit')
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}
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if (typeof opts.default !== 'undefined' &&
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typeof opts.default !== 'string' &&
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typeof opts.default !== 'number') {
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throw new Error('default value must be string or number')
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}
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var input = opts.input || process.stdin
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var output = opts.output || process.stdout
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var prompt = (opts.prompt || '').trim() + ' '
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var silent = opts.silent
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var editDef = false
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var timeout = opts.timeout
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var def = opts.default || ''
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if (def) {
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if (silent) {
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prompt += '(<default hidden>) '
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} else if (opts.edit) {
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editDef = true
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} else {
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prompt += '(' + def + ') '
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}
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}
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var terminal = !!(opts.terminal || output.isTTY)
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var m = new Mute({ replace: opts.replace, prompt: prompt })
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m.pipe(output, {end: false})
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output = m
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var rlOpts = { input: input, output: output, terminal: terminal }
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if (process.version.match(/^v0\.6/)) {
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var rl = readline.createInterface(rlOpts.input, rlOpts.output)
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} else {
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var rl = readline.createInterface(rlOpts)
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}
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output.unmute()
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rl.setPrompt(prompt)
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rl.prompt()
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if (silent) {
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output.mute()
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} else if (editDef) {
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rl.line = def
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rl.cursor = def.length
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rl._refreshLine()
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}
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var called = false
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rl.on('line', onLine)
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rl.on('error', onError)
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rl.on('SIGINT', function () {
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rl.close()
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onError(new Error('canceled'))
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})
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var timer
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if (timeout) {
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timer = setTimeout(function () {
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onError(new Error('timed out'))
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}, timeout)
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}
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function done () {
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called = true
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rl.close()
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if (process.version.match(/^v0\.6/)) {
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rl.input.removeAllListeners('data')
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rl.input.removeAllListeners('keypress')
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rl.input.pause()
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}
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clearTimeout(timer)
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output.mute()
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output.end()
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}
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function onError (er) {
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if (called) return
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done()
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return cb(er)
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}
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function onLine (line) {
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if (called) return
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if (silent && terminal) {
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output.unmute()
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output.write('\r\n')
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}
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done()
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// truncate the \n at the end.
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line = line.replace(/\r?\n$/, '')
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var isDefault = !!(editDef && line === def)
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if (def && !line) {
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isDefault = true
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line = def
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}
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cb(null, line, isDefault)
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}
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}
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