1 ///<script type="text/javascript">
4 GLib = imports.gi.GLib;
10 * Library to wrap GLib.spawn_async_with_pipes
14 * Spawn = import.Spawn;
17 * var output = Spawn.run({
19 * args : [ 'ls', '-l' ],
20 * env : [], // optional
22 output : function (line) { Seed.print(line); },
23 * stderr : function (line) {Seed.print("ERROR" + line); },
24 * input : function() { return 'xxx' },
34 * @param cfg {Object} settings - see properties.
36 * @arg cwd {String} working directory. (defaults to home directory)
37 * @arg args {Array} arguments eg. [ 'ls', '-l' ]
38 * @arg listeners {Object} (optional) handlers for output, stderr, input
39 * stderr/output both receive output line as argument
40 * input should return any standard input
41 * finish recieves result as argument.
42 * @arg env {Array} enviroment eg. [ 'GITDIR=/home/test' ]
43 * @arg async {Boolean} (optional)return instantly, or wait for exit. (default no)
44 * @arg exceptions {Boolean} throw exception on failure (default no)
45 * @arg debug {Boolean} print out what's going on.. (default no)
53 this.listeners = this.listeners || {};
54 this.cwd = this.cwd || GLib.get_home_dir();
55 if (!this.args || !this.args.length) {
70 * @property output {String} resulting output
74 * @property stderr {String} resulting output from stderr
78 * @property result {Number} execution result.
82 * @property pid {Number} pid of child process (of false if it's not running)
89 * @property in_ch {GLib.IOChannel} input io channel
93 * @property out_ch {GLib.IOChannel} output io channel
97 * @property err_ch {GLib.IOChannel} stderr io channel
104 * Run the configured command.
120 print("spawn : " + this.args.join(" "));
123 GLib.spawn_async_with_pipes(this.cwd, this.args, this.env,
124 GLib.SpawnFlags.DO_NOT_REAP_CHILD + GLib.SpawnFlags.SEARCH_PATH ,
127 this.pid = ret.child_pid;
130 print("PID: " + this.pid);
135 GLib.spawn_close_pid(_this.pid); // hopefully kills it..
138 if (_this.in_ch) _this.in_ch.close();
139 if (_this.out_ch) _this.out_ch.close();
140 if (_this.err_ch) _this.err_ch.close();
141 // blank out channels
143 _this.err_ch = false;
144 _this.out_ch = false;
145 // rmeove listeners !! important otherwise we kill the CPU
146 if (err_src !== false) GLib.source_remove(err_src);
147 if (out_src !== false) GLib.source_remove(out_src);
155 GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
156 _this.result = result;
158 print("result: " + result);
160 _this.read(_this.out_ch);
161 _this.read(_this.err_ch);
163 GLib.spawn_close_pid(_this.pid);
169 if (_this.listeners.finish) {
170 _this.listeners.finish.call(this, _this.result);
175 this.in_ch = GLib.io_channel_unix_new(ret.standard_input);
176 this.out_ch = GLib.io_channel_unix_new(ret.standard_output);
177 this.err_ch = GLib.io_channel_unix_new(ret.standard_error);
179 // make everything non-blocking!
180 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
181 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
182 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
185 // add handlers for output and stderr.
186 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
187 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI, function()
189 _this.read(_this.out_ch);
192 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
193 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT,
196 _this.read(_this.err_ch);
203 if (this.pid !== false) {
204 // child can exit before we get this far..
205 if (this.listeners.input) {
207 this.write(this.listeners.input.call(this));
216 // async - if running - return..
217 if (this.async && this.pid) {
222 // start mainloop if not async..
224 if (this.pid !== false) {
226 print("starting main loop");
228 ctx = new GLib.MainLoop.c_new (null, false);
229 ctx.run(false); // wait fore exit?
232 tidyup(); // tidyup get's called in main loop.
235 if (this.exceptions && this.result != 0) {
236 this.toString = function() { return this.stderr; };
237 throw this; // we throw self...
240 // finally throw, or return self..
246 * write to stdin of process
247 * @arg str {String} string to write to stdin of process
248 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
250 write : function(str) // write a line to
253 return; // input is closed
256 var res = this.in_ch.write_chars(str, str.length);
257 if (res != GLib.IOStatus.NORMAL) {
258 throw "Write failed";
260 return ret.bytes_written;
265 * read from pipe and call appropriate listerner and add to output or stderr string.
266 * @arg giochannel to read from.
271 var prop = ch == this.out_ch ? 'output' : 'stderr';
274 var x = new GLib.String();
275 var status = ch.read_line_string( x);
277 case GLib.IOStatus.NORMAL:
279 if (this.listeners[prop]) {
280 this.listeners[prop].call(this, x.str);
282 _this[prop] += x.str;
284 print(prop + ':' + x.str);
287 case GLib.IOStatus.AGAIN:
289 case GLib.IOStatus.ERROR:
290 case GLib.IOStatus.EOF:
302 * simple run a process - returns result, or throws stderr result...
303 * @param cfg {Object} see spawn
304 * @return {string} stdout output.
307 cfg.exceptions = true;
309 var s = new Spawn(cfg);
318 // args: ['ls', '/tmp'],