1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
var watcherManager = require("./watcherManager");
var EventEmitter = require("events").EventEmitter;
function Watchpack(options) {
EventEmitter.call(this);
if(!options) options = {};
if(!options.aggregateTimeout) options.aggregateTimeout = 200;
this.options = options;
this.watcherOptions = {
ignored: options.ignored,
poll: options.poll
};
this.fileWatchers = [];
this.dirWatchers = [];
this.mtimes = Object.create(null);
this.paused = false;
this.aggregatedChanges = [];
this.aggregatedRemovals = [];
this.aggregateTimeout = 0;
this._onTimeout = this._onTimeout.bind(this);
}
module.exports = Watchpack;
Watchpack.prototype = Object.create(EventEmitter.prototype);
Watchpack.prototype.watch = function watch(files, directories, startTime) {
this.paused = false;
var oldFileWatchers = this.fileWatchers;
var oldDirWatchers = this.dirWatchers;
this.fileWatchers = files.map(function(file) {
return this._fileWatcher(file, watcherManager.watchFile(file, this.watcherOptions, startTime));
}, this);
this.dirWatchers = directories.map(function(dir) {
return this._dirWatcher(dir, watcherManager.watchDirectory(dir, this.watcherOptions, startTime));
}, this);
oldFileWatchers.forEach(function(w) {
w.close();
}, this);
oldDirWatchers.forEach(function(w) {
w.close();
}, this);
};
Watchpack.prototype.close = function resume() {
this.paused = true;
if(this.aggregateTimeout)
clearTimeout(this.aggregateTimeout);
this.fileWatchers.forEach(function(w) {
w.close();
}, this);
this.dirWatchers.forEach(function(w) {
w.close();
}, this);
this.fileWatchers.length = 0;
this.dirWatchers.length = 0;
};
Watchpack.prototype.pause = function pause() {
this.paused = true;
if(this.aggregateTimeout)
clearTimeout(this.aggregateTimeout);
};
function addWatchersToArray(watchers, array) {
watchers.forEach(function(w) {
if(array.indexOf(w.directoryWatcher) < 0) {
array.push(w.directoryWatcher);
addWatchersToArray(Object.keys(w.directoryWatcher.directories).reduce(function(a, dir) {
if(w.directoryWatcher.directories[dir] !== true)
a.push(w.directoryWatcher.directories[dir]);
return a;
}, []), array);
}
});
}
Watchpack.prototype.getTimes = function() {
var directoryWatchers = [];
addWatchersToArray(this.fileWatchers.concat(this.dirWatchers), directoryWatchers);
var obj = Object.create(null);
directoryWatchers.forEach(function(w) {
var times = w.getTimes();
Object.keys(times).forEach(function(file) {
obj[file] = times[file];
});
});
return obj;
};
Watchpack.prototype._fileWatcher = function _fileWatcher(file, watcher) {
watcher.on("change", function(mtime, type) {
this._onChange(file, mtime, file, type);
}.bind(this));
watcher.on("remove", function(type) {
this._onRemove(file, file, type);
}.bind(this));
return watcher;
};
Watchpack.prototype._dirWatcher = function _dirWatcher(item, watcher) {
watcher.on("change", function(file, mtime, type) {
this._onChange(item, mtime, file, type);
}.bind(this));
return watcher;
};
Watchpack.prototype._onChange = function _onChange(item, mtime, file) {
file = file || item;
this.mtimes[file] = mtime;
if(this.paused) return;
this.emit("change", file, mtime);
if(this.aggregateTimeout)
clearTimeout(this.aggregateTimeout);
if(this.aggregatedChanges.indexOf(item) < 0)
this.aggregatedChanges.push(item);
this.aggregateTimeout = setTimeout(this._onTimeout, this.options.aggregateTimeout);
};
Watchpack.prototype._onRemove = function _onRemove(item, file) {
file = file || item;
delete this.mtimes[item];
if(this.paused) return;
this.emit("remove", item);
if(this.aggregateTimeout)
clearTimeout(this.aggregateTimeout);
if(this.aggregatedRemovals.indexOf(item) < 0)
this.aggregatedRemovals.push(item);
this.aggregateTimeout = setTimeout(this._onTimeout, this.options.aggregateTimeout);
};
Watchpack.prototype._onTimeout = function _onTimeout() {
this.aggregateTimeout = 0;
var changes = this.aggregatedChanges;
var removals = this.aggregatedRemovals;
this.aggregatedChanges = [];
this.aggregatedRemovals = [];
this.emit("aggregated", changes, removals);
};
|