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<a href="../../index.html">All files</a> / <a href="index.html">tar/lib</a> pack.js
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<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
<span class="quiet">Statements</span>
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<span class="strong">100% </span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict'
&nbsp;
// A readable tar stream creator
// Technically, this is a transform stream that you write paths into,
// and tar format comes out of.
// The `add()` method is like `write()` but returns this,
// and end() return `this` as well, so you can
// do `new Pack(opt).add('files').add('dir').end().pipe(output)
// You could also do something like:
// streamOfPaths().pipe(new Pack()).pipe(new fs.WriteStream('out.tar'))
&nbsp;
class PackJob {
constructor (path, absolute) {
this.path = path || './'
this.absolute = absolute
this.entry = null
this.stat = null
this.readdir = null
this.pending = false
this.ignore = false
this.piped = false
}
}
&nbsp;
const MiniPass = require('minipass')
const zlib = require('minizlib')
const ReadEntry = require('./read-entry.js')
const WriteEntry = require('./write-entry.js')
const WriteEntrySync = WriteEntry.Sync
const WriteEntryTar = WriteEntry.Tar
const Yallist = require('yallist')
const EOF = Buffer.alloc(1024)
const ONSTAT = Symbol('onStat')
const ENDED = Symbol('ended')
const QUEUE = Symbol('queue')
const CURRENT = Symbol('current')
const PROCESS = Symbol('process')
const PROCESSING = Symbol('processing')
const PROCESSJOB = Symbol('processJob')
const JOBS = Symbol('jobs')
const JOBDONE = Symbol('jobDone')
const ADDFSENTRY = Symbol('addFSEntry')
const ADDTARENTRY = Symbol('addTarEntry')
const STAT = Symbol('stat')
const READDIR = Symbol('readdir')
const ONREADDIR = Symbol('onreaddir')
const PIPE = Symbol('pipe')
const ENTRY = Symbol('entry')
const ENTRYOPT = Symbol('entryOpt')
const WRITEENTRYCLASS = Symbol('writeEntryClass')
const WRITE = Symbol('write')
const ONDRAIN = Symbol('ondrain')
&nbsp;
const fs = require('fs')
const path = require('path')
const warner = require('./warn-mixin.js')
&nbsp;
const Pack = warner(class Pack extends MiniPass {
constructor (opt) {
super(opt)
opt = opt || Object.create(null)
this.opt = opt
this.cwd = opt.cwd || process.cwd()
this.maxReadSize = opt.maxReadSize
this.preservePaths = !!opt.preservePaths
this.strict = !!opt.strict
this.noPax = !!opt.noPax
this.prefix = (opt.prefix || '').replace(/(\\|\/)+$/, '')
this.linkCache = opt.linkCache || new Map()
this.statCache = opt.statCache || new Map()
this.readdirCache = opt.readdirCache || new Map()
this[WRITEENTRYCLASS] = WriteEntry
if (typeof opt.onwarn === 'function')
this.on('warn', opt.onwarn)
&nbsp;
this.zip = null
if (opt.gzip) {
if (typeof opt.gzip !== 'object')
opt.gzip = {}
this.zip = new zlib.Gzip(opt.gzip)
this.zip.on('data', chunk =&gt; super.write(chunk))
this.zip.on('end', _ =&gt; super.end())
this.zip.on('drain', _ =&gt; this[ONDRAIN]())
this.on('resume', _ =&gt; this.zip.resume())
} else
this.on('drain', this[ONDRAIN])
&nbsp;
this.portable = !!opt.portable
this.noDirRecurse = !!opt.noDirRecurse
this.follow = !!opt.follow
this.noMtime = !!opt.noMtime
&nbsp;
&nbsp;
this.filter = typeof opt.filter === 'function' ? opt.filter : _ =&gt; true
&nbsp;
this[QUEUE] = new Yallist
this[JOBS] = 0
this.jobs = +opt.jobs || 4
this[PROCESSING] = false
this[ENDED] = false
}
&nbsp;
[WRITE] (chunk) {
return super.write(chunk)
}
&nbsp;
add (path) {
this.write(path)
return this
}
&nbsp;
end (path) {
if (path)
this.write(path)
this[ENDED] = true
this[PROCESS]()
return this
}
&nbsp;
write (path) {
if (this[ENDED])
throw new Error('write after end')
&nbsp;
if (path instanceof ReadEntry)
this[ADDTARENTRY](path)
else
this[ADDFSENTRY](path)
return this.flowing
}
&nbsp;
[ADDTARENTRY] (p) {
const absolute = path.resolve(this.cwd, p.path)
if (this.prefix)
p.path = this.prefix + '/' + p.path.replace(/^\.(\/+|$)/, '')
&nbsp;
// in this case, we don't have to wait for the stat
if (!this.filter(p.path, p))
p.resume()
else {
const job = new PackJob(p.path, absolute, false)
job.entry = new WriteEntryTar(p, this[ENTRYOPT](job))
job.entry.on('end', _ =&gt; this[JOBDONE](job))
this[JOBS] += 1
this[QUEUE].push(job)
}
&nbsp;
this[PROCESS]()
}
&nbsp;
[ADDFSENTRY] (p) {
const absolute = path.resolve(this.cwd, p)
if (this.prefix)
p = this.prefix + '/' + p.replace(/^\.(\/+|$)/, '')
&nbsp;
this[QUEUE].push(new PackJob(p, absolute))
this[PROCESS]()
}
&nbsp;
[STAT] (job) {
job.pending = true
this[JOBS] += 1
const stat = this.follow ? 'stat' : 'lstat'
fs[stat](job.absolute, (er, stat) =&gt; {
job.pending = false
this[JOBS] -= 1
if (er)
this.emit('error', er)
else
this[ONSTAT](job, stat)
})
}
&nbsp;
[ONSTAT] (job, stat) {
this.statCache.set(job.absolute, stat)
job.stat = stat
&nbsp;
// now we have the stat, we can filter it.
if (!this.filter(job.path, stat))
job.ignore = true
&nbsp;
this[PROCESS]()
}
&nbsp;
[READDIR] (job) {
job.pending = true
this[JOBS] += 1
fs.readdir(job.absolute, (er, entries) =&gt; {
job.pending = false
this[JOBS] -= 1
if (er)
return this.emit('error', er)
this[ONREADDIR](job, entries)
})
}
&nbsp;
[ONREADDIR] (job, entries) {
this.readdirCache.set(job.absolute, entries)
job.readdir = entries
this[PROCESS]()
}
&nbsp;
[PROCESS] () {
if (this[PROCESSING])
return
&nbsp;
this[PROCESSING] = true
for (let w = this[QUEUE].head;
w !== null &amp;&amp; this[JOBS] &lt; this.jobs;
w = w.next) {
this[PROCESSJOB](w.value)
if (w.value.ignore) {
const p = w.next
this[QUEUE].removeNode(w)
w.next = p
}
}
&nbsp;
this[PROCESSING] = false
&nbsp;
if (this[ENDED] &amp;&amp; !this[QUEUE].length &amp;&amp; this[JOBS] === 0) {
if (this.zip)
this.zip.end(EOF)
else {
super.write(EOF)
super.end()
}
}
}
&nbsp;
get [CURRENT] () {
return this[QUEUE] &amp;&amp; this[QUEUE].head &amp;&amp; this[QUEUE].head.value
}
&nbsp;
[JOBDONE] (job) {
this[QUEUE].shift()
this[JOBS] -= 1
this[PROCESS]()
}
&nbsp;
[PROCESSJOB] (job) {
if (job.pending)
return
&nbsp;
if (job.entry) {
if (job === this[CURRENT] &amp;&amp; !job.piped)
this[PIPE](job)
return
}
&nbsp;
if (!job.stat) {
if (this.statCache.has(job.absolute))
this[ONSTAT](job, this.statCache.get(job.absolute))
else
this[STAT](job)
}
if (!job.stat)
return
&nbsp;
// filtered out!
if (job.ignore)
return
&nbsp;
if (!this.noDirRecurse &amp;&amp; job.stat.isDirectory() &amp;&amp; !job.readdir) {
if (this.readdirCache.has(job.absolute))
this[ONREADDIR](job, this.readdirCache.get(job.absolute))
else
this[READDIR](job)
if (!job.readdir)
return
}
&nbsp;
// we know it doesn't have an entry, because that got checked above
job.entry = this[ENTRY](job)
if (!job.entry) {
job.ignore = true
return
}
&nbsp;
if (job === this[CURRENT] &amp;&amp; !job.piped)
this[PIPE](job)
}
&nbsp;
[ENTRYOPT] (job) {
return {
onwarn: (msg, data) =&gt; {
this.warn(msg, data)
},
noPax: this.noPax,
cwd: this.cwd,
absolute: job.absolute,
preservePaths: this.preservePaths,
maxReadSize: this.maxReadSize,
strict: this.strict,
portable: this.portable,
linkCache: this.linkCache,
statCache: this.statCache,
noMtime: this.noMtime
}
}
&nbsp;
[ENTRY] (job) {
this[JOBS] += 1
try {
return new this[WRITEENTRYCLASS](job.path, this[ENTRYOPT](job))
.on('end', () =&gt; this[JOBDONE](job))
.on('error', er =&gt; this.emit('error', er))
} catch (er) {
this.emit('error', er)
}
}
&nbsp;
[ONDRAIN] () {
if (this[CURRENT] &amp;&amp; this[CURRENT].entry)
this[CURRENT].entry.resume()
}
&nbsp;
// like .pipe() but using super, because our write() is special
[PIPE] (job) {
job.piped = true
&nbsp;
if (job.readdir)
job.readdir.forEach(entry =&gt; {
const p = this.prefix ?
job.path.slice(this.prefix.length + 1) || './'
: job.path
&nbsp;
const base = p === './' ? '' : p.replace(/\/*$/, '/')
this[ADDFSENTRY](base + entry)
})
&nbsp;
const source = job.entry
const zip = this.zip
&nbsp;
if (zip)
source.on('data', chunk =&gt; {
if (!zip.write(chunk))
source.pause()
})
else
source.on('data', chunk =&gt; {
if (!super.write(chunk))
source.pause()
})
}
&nbsp;
pause () {
if (this.zip)
this.zip.pause()
return super.pause()
}
})
&nbsp;
class PackSync extends Pack {
constructor (opt) {
super(opt)
this[WRITEENTRYCLASS] = WriteEntrySync
}
&nbsp;
// pause/resume are no-ops in sync streams.
pause () {}
resume () {}
&nbsp;
[STAT] (job) {
const stat = this.follow ? 'statSync' : 'lstatSync'
this[ONSTAT](job, fs[stat](job.absolute))
}
&nbsp;
[READDIR] (job, stat) {
this[ONREADDIR](job, fs.readdirSync(job.absolute))
}
&nbsp;
// gotta get it all in this tick
[PIPE] (job) {
const source = job.entry
const zip = this.zip
&nbsp;
if (job.readdir)
job.readdir.forEach(entry =&gt; {
const p = this.prefix ?
job.path.slice(this.prefix.length + 1) || './'
: job.path
&nbsp;
&nbsp;
const base = p === './' ? '' : p.replace(/\/*$/, '/')
this[ADDFSENTRY](base + entry)
})
&nbsp;
if (zip)
source.on('data', chunk =&gt; {
zip.write(chunk)
})
else
source.on('data', chunk =&gt; {
super[WRITE](chunk)
})
}
}
&nbsp;
Pack.Sync = PackSync
&nbsp;
module.exports = Pack
&nbsp;</pre></td></tr>
</table></pre>
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