mirror of
https://github.com/actions/setup-python.git
synced 2024-11-23 00:49:39 +00:00
111 lines
2.8 KiB
JavaScript
111 lines
2.8 KiB
JavaScript
module.exports = Walker
|
|
|
|
var path = require('path')
|
|
, fs = require('fs')
|
|
, util = require('util')
|
|
, EventEmitter = require('events').EventEmitter
|
|
, makeError = require('makeerror')
|
|
|
|
/**
|
|
* To walk a directory. It's complicated (but it's async, so it must be fast).
|
|
*
|
|
* @param root {String} the directory to start with
|
|
*/
|
|
function Walker(root) {
|
|
if (!(this instanceof Walker)) return new Walker(root)
|
|
EventEmitter.call(this)
|
|
this._pending = 0
|
|
this._filterDir = function() { return true }
|
|
this.go(root)
|
|
}
|
|
util.inherits(Walker, EventEmitter)
|
|
|
|
/**
|
|
* Errors of this type are thrown when the type of a file could not be
|
|
* determined.
|
|
*/
|
|
var UnknownFileTypeError = Walker.UnknownFileTypeError = makeError(
|
|
'UnknownFileTypeError',
|
|
'The type of this file could not be determined.'
|
|
)
|
|
|
|
/**
|
|
* Setup a function to filter out directory entries.
|
|
*
|
|
* @param fn {Function} a function that will be given a directory name, which
|
|
* if returns true will include the directory and it's children
|
|
*/
|
|
Walker.prototype.filterDir = function(fn) {
|
|
this._filterDir = fn
|
|
return this
|
|
}
|
|
|
|
/**
|
|
* Process a file or directory.
|
|
*/
|
|
Walker.prototype.go = function(entry) {
|
|
var that = this
|
|
this._pending++
|
|
|
|
fs.lstat(entry, function(er, stat) {
|
|
if (er) {
|
|
that.emit('error', er, entry, stat)
|
|
that.doneOne()
|
|
return
|
|
}
|
|
|
|
if (stat.isDirectory()) {
|
|
if (!that._filterDir(entry, stat)) {
|
|
that.doneOne()
|
|
} else {
|
|
fs.readdir(entry, function(er, files) {
|
|
if (er) {
|
|
that.emit('error', er, entry, stat)
|
|
that.doneOne()
|
|
return
|
|
}
|
|
|
|
that.emit('entry', entry, stat)
|
|
that.emit('dir', entry, stat)
|
|
files.forEach(function(part) {
|
|
that.go(path.join(entry, part))
|
|
})
|
|
that.doneOne()
|
|
})
|
|
}
|
|
} else if (stat.isSymbolicLink()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('symlink', entry, stat)
|
|
that.doneOne()
|
|
} else if (stat.isBlockDevice()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('blockDevice', entry, stat)
|
|
that.doneOne()
|
|
} else if (stat.isCharacterDevice()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('characterDevice', entry, stat)
|
|
that.doneOne()
|
|
} else if (stat.isFIFO()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('fifo', entry, stat)
|
|
that.doneOne()
|
|
} else if (stat.isSocket()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('socket', entry, stat)
|
|
that.doneOne()
|
|
} else if (stat.isFile()) {
|
|
that.emit('entry', entry, stat)
|
|
that.emit('file', entry, stat)
|
|
that.doneOne()
|
|
} else {
|
|
that.emit('error', UnknownFileTypeError(), entry, stat)
|
|
that.doneOne()
|
|
}
|
|
})
|
|
return this
|
|
}
|
|
|
|
Walker.prototype.doneOne = function() {
|
|
if (--this._pending === 0) this.emit('end')
|
|
return this
|
|
}
|