3 using Gee; // for array list?
5 static int main (string[] args) {
6 // A reference to our file
7 var file = File.new_for_path ("data.txt");
13 var Gio = imports.gi.Gio;
14 var GLib = imports.gi.GLib;
20 * Library to wrap GLib.spawn_async_with_pipes
24 * Spawn = import.Spawn;
27 * var output = Spawn.run({
29 * args : [ 'ls', '-l' ],
30 * env : [], // optional
32 output : function (line) { Seed.print(line); },
33 * stderr : function (line) {Seed.print("ERROR" + line); },
34 * input : function() { return 'xxx' },
42 *var output = Spawn.run( SpawnConfig() {
46 ouput = (line) => { stdout.printf("%d\n", line); }
47 stderr = (line) => { stdout.printf("%d\n", line); }
48 input = () => { return "xxx"; }
53 delegate void SpawnOutput(string line);
54 delegate void SpawnErr(string line);
55 delegate string SpawnInput();
64 public SpawnOutput output
65 public SpawnErr stderr;
66 public SpawnInput input;
73 * @param cfg {Object} settings - see properties.
75 * @arg cwd {String} working directory. (defaults to home directory)
76 * @arg args {Array} arguments eg. [ 'ls', '-l' ]
77 * @arg listeners {Object} (optional) handlers for output, stderr, input
78 * stderr/output both receive output line as argument
79 * input should return any standard input
80 * finish recieves result as argument.
81 * @arg env {Array} enviroment eg. [ 'GITDIR=/home/test' ]
82 * @arg async {Boolean} (optional)return instantly, or wait for exit. (default no)
83 * @arg exceptions {Boolean} throw exception on failure (default no)
84 * @arg debug {Boolean} print out what's going on.. (default no)
92 this.listeners = this.listeners || {};
93 this.cwd = this.cwd || GLib.get_home_dir();
94 if (!this.args || !this.args.length) {
103 ctx : false, // the mainloop ctx.
112 * @property output {String} resulting output
116 * @property stderr {String} resulting output from stderr
120 * @property result {Number} execution result.
124 * @property pid {Number} pid of child process (of false if it's not running)
128 * @property in_ch {GLib.IOChannel} input io channel
132 * @property out_ch {GLib.IOChannel} output io channel
136 * @property err_ch {GLib.IOChannel} stderr io channel
142 * Run the configured command.
143 * result is applied to object properties (eg. 'output' or 'stderr')
144 * @returns {Object} self.
156 print("cd " + this.cwd +";" + this.args.join(" "));
159 var gret = GLib.spawn_async_with_pipes(this.cwd, this.args, this.env,
160 GLib.SpawnFlags.DO_NOT_REAP_CHILD + GLib.SpawnFlags.SEARCH_PATH ,
164 if (typeof(Seed) == 'undefined') {
167 standard_input : gret[2],
168 standard_output: gret[3],
169 standard_error: gret[4]
174 //print(JSON.stringify(gret));
175 this.pid = ret.child_pid;
178 print("PID: " + this.pid);
183 GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
184 _this.result = result;
186 print("child_watch_add : result: " + result);
188 _this.read(_this.out_ch);
189 _this.read(_this.err_ch);
192 GLib.spawn_close_pid(_this.pid);
198 //print("DONE TIDYUP");
199 if (_this.listeners.finish) {
200 _this.listeners.finish.call(this, _this.result);
207 GLib.spawn_close_pid(_this.pid); // hopefully kills it..
210 if (_this.in_ch) _this.in_ch.close();
211 if (_this.out_ch) _this.out_ch.close();
212 if (_this.err_ch) _this.err_ch.close();
213 // blank out channels
215 _this.err_ch = false;
216 _this.out_ch = false;
217 // rmeove listeners !! important otherwise we kill the CPU
218 if (err_src !== false) GLib.source_remove(err_src);
219 if (out_src !== false) GLib.source_remove(out_src);
226 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
227 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
228 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
230 // make everything non-blocking!
234 // using NONBLOCKING only works if io_add_watch
235 //returns true/false in right conditions
236 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
237 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
238 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
242 // add handlers for output and stderr.
243 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
244 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
247 return _this.read(_this.out_ch);
251 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
252 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
255 return _this.read(_this.err_ch);
262 if (this.pid !== false) {
263 // child can exit before 1we get this far..
264 if (this.listeners.input) {
265 print("Trying to call listeners");
267 this.write(this.listeners.input.call(this));
268 // this probably needs to be a bit smarter...
269 //but... let's close input now..
285 // async - if running - return..
286 if (this.async && this.pid) {
290 // start mainloop if not async..
292 if (this.pid !== false) {
294 print("starting main loop");
297 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
298 this.ctx.run(false); // wait fore exit?
300 //print("main_loop done!");
302 tidyup(); // tidyup get's called in main loop.
305 if (this.exceptions && this.result != 0) {
306 this.toString = function() { return this.stderr; };
307 throw this; // we throw self...
310 // finally throw, or return self..
316 * write to stdin of process
317 * @arg str {String} string to write to stdin of process
318 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
320 write : function(str) // write a line to
323 return 0; // input is closed
325 //print("write: " + str);
326 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
328 //var res = this.in_ch.write_chars(str, str.length, ret);
329 var res = this.in_ch.write_chars(str, str.length);
331 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
333 if (res != GLib.IOStatus.NORMAL) {
334 throw "Write failed";
342 * read from pipe and call appropriate listerner and add to output or stderr string.
343 * @arg giochannel to read from.
348 var prop = ch == this.out_ch ? 'output' : 'stderr';
349 // print("prop: " + prop);
353 //print(JSON.stringify(ch, null,4));
357 var status = ch.read_line( x);
358 // print('status: ' +JSON.stringify(status));
359 // print(JSON.stringify(x));
361 case GLib.IOStatus.NORMAL:
364 if (this.listeners[prop]) {
365 this.listeners[prop].call(this, x.str_return);
367 _this[prop] += x.str_return;
369 print(prop + ':' + x.str_return.replace(/\n/, ''));
373 if (imports.gi.Gtk.events_pending()) {
374 imports.gi.Gtk.main_iteration();
381 //this.ctx.iteration(true);
383 case GLib.IOStatus.AGAIN:
384 //print("Should be called again.. waiting for more data..");
387 case GLib.IOStatus.ERROR:
388 case GLib.IOStatus.EOF:
396 //print("RETURNING");
397 return false; // allow it to be called again..
404 * simple run a process - returns result, or throws stderr result...
405 * @param cfg {Object} see spawn
406 * @return {string} stdout output.
409 cfg.exceptions = true;
411 var s = new Spawn(cfg);
419 args: ['ls', '/tmp'],
422 } catch (e) { print(JSON.stringify(e)); }
424 var secs = (new Date()).getSeconds()
428 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
431 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }