biobulkbende.org/node_modules/fstream/examples/pipe.js
2020-09-16 14:23:28 +02:00

119 lines
2.9 KiB
JavaScript

var fstream = require('../fstream.js')
var path = require('path')
var r = fstream.Reader({
path: path.dirname(__dirname),
filter: function () {
return !this.basename.match(/^\./) &&
!this.basename.match(/^node_modules$/) &&
!this.basename.match(/^deep-copy$/)
}
})
var w = fstream.Writer({
path: path.resolve(__dirname, 'deep-copy'),
type: 'Directory'
})
var indent = ''
r.on('entry', appears)
r.on('ready', function () {
console.error('ready to begin!', r.path)
})
function appears (entry) {
console.error(indent + 'a %s appears!', entry.type, entry.basename, typeof entry.basename, entry)
if (foggy) {
console.error('FOGGY!')
var p = entry
do {
console.error(p.depth, p.path, p._paused)
p = p.parent
} while (p)
throw new Error('\u001b[mshould not have entries while foggy')
}
indent += '\t'
entry.on('data', missile(entry))
entry.on('end', runaway(entry))
entry.on('entry', appears)
}
var foggy
function missile (entry) {
function liftFog (who) {
if (!foggy) return
if (who) {
console.error('%s breaks the spell!', who && who.path)
} else {
console.error('the spell expires!')
}
console.error('\u001b[mthe fog lifts!\n')
clearTimeout(foggy)
foggy = null
if (entry._paused) entry.resume()
}
if (entry.type === 'Directory') {
var ended = false
entry.once('end', function () { ended = true })
return function (c) {
// throw in some pathological pause()/resume() behavior
// just for extra fun.
process.nextTick(function () {
if (!foggy && !ended) { // && Math.random() < 0.3) {
console.error(indent + '%s casts a spell', entry.basename)
console.error('\na slowing fog comes over the battlefield...\n\u001b[32m')
entry.pause()
entry.once('resume', liftFog)
foggy = setTimeout(liftFog, 10)
}
})
}
}
return function (c) {
var e = Math.random() < 0.5
console.error(indent + '%s %s for %d damage!',
entry.basename,
e ? 'is struck' : 'fires a chunk',
c.length)
}
}
function runaway (entry) {
return function () {
var e = Math.random() < 0.5
console.error(indent + '%s %s',
entry.basename,
e ? 'turns to flee' : 'is vanquished!')
indent = indent.slice(0, -1)
}
}
w.on('entry', attacks)
// w.on('ready', function () { attacks(w) })
function attacks (entry) {
console.error(indent + '%s %s!', entry.basename,
entry.type === 'Directory' ? 'calls for backup' : 'attacks')
entry.on('entry', attacks)
}
var ended = false
r.on('end', function () {
if (foggy) clearTimeout(foggy)
console.error("\u001b[mIT'S OVER!!")
console.error('A WINNAR IS YOU!')
console.log('ok 1 A WINNAR IS YOU')
ended = true
})
process.on('exit', function () {
console.log((ended ? '' : 'not ') + 'ok 2 ended')
console.log('1..2')
})
r.pipe(w)