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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { Ci } = require("chrome");
const Services = require("Services");
const EventEmitter = require("devtools/shared/event-emitter");
loader.lazyImporter(this, "OS", "resource://gre/modules/osfile.jsm");
const HOTRELOAD_PREF = "devtools.loader.hotreload";
function resolveResourcePath(uri) {
const handler = Services.io.getProtocolHandler("resource")
.QueryInterface(Ci.nsIResProtocolHandler);
const resolved = handler.resolveURI(Services.io.newURI(uri, null, null));
return resolved.replace(/file:\/\//, "");
}
function findSourceDir(path) {
if (path === "" || path === "/") {
return Promise.resolve(null);
}
return OS.File.exists(
OS.Path.join(path, "devtools/client/shared/file-watcher.js")
).then(exists => {
if (exists) {
return path;
}
return findSourceDir(OS.Path.dirname(path));
});
}
let worker = null;
const onPrefChange = function () {
// We need to figure out a src dir to watch. These are the actual
// files the user is working with, not the files in the obj dir. We
// do this by walking up the filesystem and looking for the devtools
// directories, and falling back to the raw path. This means none of
// this will work for users who store their obj dirs outside of the
// src dir.
//
// We take care not to mess with the `devtoolsPath` if that's what
// we end up using, because it might be intentionally mapped to a
// specific place on the filesystem for loading devtools externally.
//
// `devtoolsPath` is currently the devtools directory inside of the
// obj dir, and we search for `devtools/client`, so go up 2 levels
// to skip that devtools dir and start searching for the src dir.
if (Services.prefs.getBoolPref(HOTRELOAD_PREF) && !worker) {
const devtoolsPath = resolveResourcePath("resource://devtools")
.replace(/\/$/, "");
const searchPoint = OS.Path.dirname(OS.Path.dirname(devtoolsPath));
findSourceDir(searchPoint)
.then(srcPath => {
const rootPath = srcPath ? OS.Path.join(srcPath, "devtools")
: devtoolsPath;
const watchPath = OS.Path.join(rootPath, "client");
const { watchFiles } = require("devtools/client/shared/file-watcher");
worker = watchFiles(watchPath, path => {
let relativePath = path.replace(rootPath + "/", "");
module.exports.emit("file-changed", relativePath, path);
});
});
} else if (worker) {
worker.terminate();
worker = null;
}
};
Services.prefs.addObserver(HOTRELOAD_PREF, {
observe: onPrefChange
}, false);
onPrefChange();
EventEmitter.decorate(module.exports);
|
