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;
71 * @param cfg {Object} settings - see properties.
73 * @arg cwd {String} working directory. (defaults to home directory)
74 * @arg args {Array} arguments eg. [ 'ls', '-l' ]
75 * @arg listeners {Object} (optional) handlers for output, stderr, input
76 * stderr/output both receive output line as argument
77 * input should return any standard input
78 * finish recieves result as argument.
79 * @arg env {Array} enviroment eg. [ 'GITDIR=/home/test' ]
80 * @arg async {Boolean} (optional)return instantly, or wait for exit. (default no)
81 * @arg exceptions {Boolean} throw exception on failure (default no)
82 * @arg debug {Boolean} print out what's going on.. (default no)
91 this.listeners = this.listeners || {};
92 this.cwd = this.cwd || GLib.get_home_dir();
93 if (!this.args || !this.args.length) {
102 ctx : false, // the mainloop ctx.
111 * @property output {String} resulting output
115 * @property stderr {String} resulting output from stderr
119 * @property result {Number} execution result.
123 * @property pid {Number} pid of child process (of false if it's not running)
127 * @property in_ch {GLib.IOChannel} input io channel
131 * @property out_ch {GLib.IOChannel} output io channel
135 * @property err_ch {GLib.IOChannel} stderr io channel
141 * Run the configured command.
142 * result is applied to object properties (eg. 'output' or 'stderr')
143 * @returns {Object} self.
155 print("cd " + this.cwd +";" + this.args.join(" "));
158 var gret = GLib.spawn_async_with_pipes(this.cwd, this.args, this.env,
159 GLib.SpawnFlags.DO_NOT_REAP_CHILD + GLib.SpawnFlags.SEARCH_PATH ,
163 if (typeof(Seed) == 'undefined') {
166 standard_input : gret[2],
167 standard_output: gret[3],
168 standard_error: gret[4]
173 //print(JSON.stringify(gret));
174 this.pid = ret.child_pid;
177 print("PID: " + this.pid);
182 GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
183 _this.result = result;
185 print("child_watch_add : result: " + result);
187 _this.read(_this.out_ch);
188 _this.read(_this.err_ch);
191 GLib.spawn_close_pid(_this.pid);
197 //print("DONE TIDYUP");
198 if (_this.listeners.finish) {
199 _this.listeners.finish.call(this, _this.result);
206 GLib.spawn_close_pid(_this.pid); // hopefully kills it..
209 if (_this.in_ch) _this.in_ch.close();
210 if (_this.out_ch) _this.out_ch.close();
211 if (_this.err_ch) _this.err_ch.close();
212 // blank out channels
214 _this.err_ch = false;
215 _this.out_ch = false;
216 // rmeove listeners !! important otherwise we kill the CPU
217 if (err_src !== false) GLib.source_remove(err_src);
218 if (out_src !== false) GLib.source_remove(out_src);
225 this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
226 this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
227 this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
229 // make everything non-blocking!
233 // using NONBLOCKING only works if io_add_watch
234 //returns true/false in right conditions
235 this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
236 this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
237 this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
241 // add handlers for output and stderr.
242 out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
243 GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
246 return _this.read(_this.out_ch);
250 err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
251 GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
254 return _this.read(_this.err_ch);
261 if (this.pid !== false) {
262 // child can exit before 1we get this far..
263 if (this.listeners.input) {
264 print("Trying to call listeners");
266 this.write(this.listeners.input.call(this));
267 // this probably needs to be a bit smarter...
268 //but... let's close input now..
284 // async - if running - return..
285 if (this.async && this.pid) {
289 // start mainloop if not async..
291 if (this.pid !== false) {
293 print("starting main loop");
296 this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
297 this.ctx.run(false); // wait fore exit?
299 //print("main_loop done!");
301 tidyup(); // tidyup get's called in main loop.
304 if (this.exceptions && this.result != 0) {
305 this.toString = function() { return this.stderr; };
306 throw this; // we throw self...
309 // finally throw, or return self..
315 * write to stdin of process
316 * @arg str {String} string to write to stdin of process
317 * @returns GLib.IOStatus (0 == error, 1= NORMAL)
319 write : function(str) // write a line to
322 return 0; // input is closed
324 //print("write: " + str);
325 // NEEDS GIR FIX! for return value.. let's ignore for the time being..
327 //var res = this.in_ch.write_chars(str, str.length, ret);
328 var res = this.in_ch.write_chars(str, str.length);
330 //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
332 if (res != GLib.IOStatus.NORMAL) {
333 throw "Write failed";
341 * read from pipe and call appropriate listerner and add to output or stderr string.
342 * @arg giochannel to read from.
347 var prop = ch == this.out_ch ? 'output' : 'stderr';
348 // print("prop: " + prop);
352 //print(JSON.stringify(ch, null,4));
356 var status = ch.read_line( x);
357 // print('status: ' +JSON.stringify(status));
358 // print(JSON.stringify(x));
360 case GLib.IOStatus.NORMAL:
363 if (this.listeners[prop]) {
364 this.listeners[prop].call(this, x.str_return);
366 _this[prop] += x.str_return;
368 print(prop + ':' + x.str_return.replace(/\n/, ''));
372 if (imports.gi.Gtk.events_pending()) {
373 imports.gi.Gtk.main_iteration();
380 //this.ctx.iteration(true);
382 case GLib.IOStatus.AGAIN:
383 //print("Should be called again.. waiting for more data..");
386 case GLib.IOStatus.ERROR:
387 case GLib.IOStatus.EOF:
395 //print("RETURNING");
396 return false; // allow it to be called again..
403 * simple run a process - returns result, or throws stderr result...
404 * @param cfg {Object} see spawn
405 * @return {string} stdout output.
408 cfg.exceptions = true;
410 var s = new Spawn(cfg);
418 args: ['ls', '/tmp'],
421 } catch (e) { print(JSON.stringify(e)); }
423 var secs = (new Date()).getSeconds()
427 args: ['/bin/touch', '/tmp/spawntest-' + secs ],
430 } catch (e) { print( 'Error: ' + JSON.stringify(e)); }