1 files changed, 111 insertions, 0 deletions
diff --git a/node_modules/walker/lib/walker.js b/node_modules/walker/lib/walker.js
new file mode 100644
index 0000000..1907842
--- /dev/null
+++ b/node_modules/walker/lib/walker.js
@@ -0,0 +1,111 @@
+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
+}