--- /dev/null
+///<script type="text/javascript">
+
+var Gio = imports.gi.Gio;
+var GLib = imports.gi.GLib;
+
+
+/**
+* @namespace Spawn
+*
+* Library to wrap GLib.spawn_async_with_pipes
+*
+* usage:
+*
+* Spawn = import.Spawn;
+*
+* simple version..
+* var output = Spawn.run({
+* cwd : '/home',
+* args : [ 'ls', '-l' ],
+* env : [], // optional
+* listeners : {
+ output : function (line) { Seed.print(line); },
+* stderr : function (line) {Seed.print("ERROR" + line); },
+* input : function() { return 'xxx' },
+* }
+* });
+*
+*
+*
+
+*
+*
+* CRITICAL - needs this change to gir in GLib-2.0.gir g_spawn_async_with_pipes
+* Fixed in Ubuntu 12.10
+ <parameter name="argv" transfer-ownership="none">
+ <array c:type="gchar**">
+ <type name="utf8"/>
+ </array>
+ </parameter>
+ <parameter name="envp" transfer-ownership="none" allow-none="1">
+ <array c:type="gchar**">
+ <type name="utf8"/>
+ </array>
+ </parameter>
+*
+* ALSO in GLib-2.0.gir
+
+<method name="read_line"
+ c:identifier="g_io_channel_read_line"
+ throws="1">
+ <return-value transfer-ownership="none">
+ <type name="IOStatus" c:type="GIOStatus"/>
+ </return-value>
+ <parameters>
+ <parameter name="str_return" transfer-ownership="full" direction="out">
+ <type name="utf8" c:type="gchar**"/>
+ </parameter>
+ <parameter name="length" transfer-ownership="none" direction="out">
+ <type name="gsize" c:type="gsize*"/>
+ </parameter>
+ <parameter name="terminator_pos" transfer-ownership="none" direction="out">
+ <type name="gsize" c:type="gsize*"/>
+ </parameter>
+ </parameters>
+ </method>
+*
+* run g-ir-compile -o /usr/lib/girepostitory-1.0/GLib-2.0.typelib GLib-2.0.gir
+*
+*
+*/
+
+
+/**
+ * @class Spawn
+ * @param cfg {Object} settings - see properties.
+ *
+ * @arg cwd {String} working directory. (defaults to home directory)
+ * @arg args {Array} arguments eg. [ 'ls', '-l' ]
+ * @arg listeners {Object} (optional) handlers for output, stderr, input
+ * stderr/output both receive output line as argument
+ * input should return any standard input
+ * finish recieves result as argument.
+ * @arg env {Array} enviroment eg. [ 'GITDIR=/home/test' ]
+ * @arg async {Boolean} (optional)return instantly, or wait for exit. (default no)
+ * @arg exceptions {Boolean} throw exception on failure (default no)
+ * @arg debug {Boolean} print out what's going on.. (default no)
+ *
+ */
+function Spawn(cfg) {
+ for(var i in cfg) {
+ this[i] = cfg[i];
+ }
+ // set defaults?
+ this.listeners = this.listeners || {};
+ this.cwd = this.cwd || GLib.get_home_dir();
+ if (!this.args || !this.args.length) {
+ throw "No arguments";
+ }
+
+}
+
+
+Spawn.prototype = {
+
+ ctx : false, // the mainloop ctx.
+ listeners : false,
+ async : false,
+ env : null,
+ cwd: false,
+ args: false,
+ exceptions : false,
+ debug : false,
+ /**
+ * @property output {String} resulting output
+ */
+ output : '',
+ /**
+ * @property stderr {String} resulting output from stderr
+ */
+ stderr : '',
+ /**
+ * @property result {Number} execution result.
+ */
+ result: 0,
+ /**
+ * @property pid {Number} pid of child process (of false if it's not running)
+ */
+ pid : false,
+ /**
+ * @property in_ch {GLib.IOChannel} input io channel
+ */
+ in_ch : false,
+ /**
+ * @property out_ch {GLib.IOChannel} output io channel
+ */
+ out_ch : false,
+ /**
+ * @property err_ch {GLib.IOChannel} stderr io channel
+ */
+ err_ch : false,
+ /**
+ *
+ * @method run
+ * Run the configured command.
+ * result is applied to object properties (eg. 'output' or 'stderr')
+ * @returns {Object} self.
+ */
+ run : function()
+ {
+
+ var _this = this;
+
+ var err_src = false;
+ var out_src = false;
+ var ret = {};
+
+ if (this.debug) {
+ print("cd " + this.cwd +";" + this.args.join(" "));
+ }
+
+ var gret = GLib.spawn_async_with_pipes(this.cwd, this.args, this.env,
+ GLib.SpawnFlags.DO_NOT_REAP_CHILD + GLib.SpawnFlags.SEARCH_PATH ,
+ null, null, ret);
+
+ var isSeed = true;
+ if (typeof(Seed) == 'undefined') {
+ ret = {
+ child_pid : gret[1],
+ standard_input : gret[2],
+ standard_output: gret[3],
+ standard_error: gret[4]
+ };
+ isSeed = false;
+ }
+
+ //print(JSON.stringify(gret));
+ this.pid = ret.child_pid;
+
+ if (this.debug) {
+ print("PID: " + this.pid);
+ }
+
+
+
+ GLib.child_watch_add(GLib.PRIORITY_DEFAULT, this.pid, function(pid, result) {
+ _this.result = result;
+ if (_this.debug) {
+ print("child_watch_add : result: " + result);
+ }
+ _this.read(_this.out_ch);
+ _this.read(_this.err_ch);
+
+
+ GLib.spawn_close_pid(_this.pid);
+ _this.pid = false;
+ if (_this.ctx) {
+ _this.ctx.quit();
+ }
+ tidyup();
+ //print("DONE TIDYUP");
+ if (_this.listeners.finish) {
+ _this.listeners.finish.call(this, _this.result);
+ }
+ });
+
+ function tidyup()
+ {
+ if (_this.pid) {
+ GLib.spawn_close_pid(_this.pid); // hopefully kills it..
+ _this.pid = false;
+ }
+ if (_this.in_ch) _this.in_ch.close();
+ if (_this.out_ch) _this.out_ch.close();
+ if (_this.err_ch) _this.err_ch.close();
+ // blank out channels
+ _this.in_ch = false;
+ _this.err_ch = false;
+ _this.out_ch = false;
+ // rmeove listeners !! important otherwise we kill the CPU
+ if (err_src !== false) GLib.source_remove(err_src);
+ if (out_src !== false) GLib.source_remove(out_src);
+ err_src = false;
+ out_src = false;
+
+ }
+
+
+ this.in_ch = new GLib.IOChannel.unix_new(ret.standard_input);
+ this.out_ch = new GLib.IOChannel.unix_new(ret.standard_output);
+ this.err_ch = new GLib.IOChannel.unix_new(ret.standard_error);
+
+ // make everything non-blocking!
+
+
+
+ // using NONBLOCKING only works if io_add_watch
+ //returns true/false in right conditions
+ this.in_ch.set_flags (GLib.IOFlags.NONBLOCK);
+ this.out_ch.set_flags (GLib.IOFlags.NONBLOCK);
+ this.err_ch.set_flags (GLib.IOFlags.NONBLOCK);
+
+
+
+ // add handlers for output and stderr.
+ out_src= GLib.io_add_watch(this.out_ch, GLib.PRIORITY_DEFAULT,
+ GLib.IOCondition.OUT + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.HUP + GLib.IOCondition.ERR,
+ function() {
+
+ return _this.read(_this.out_ch);
+
+ }
+ );
+ err_src= GLib.io_add_watch(this.err_ch, GLib.PRIORITY_DEFAULT,
+ GLib.IOCondition.ERR + GLib.IOCondition.IN + GLib.IOCondition.PRI + GLib.IOCondition.OUT + GLib.IOCondition.HUP,
+ function()
+ {
+ return _this.read(_this.err_ch);
+
+ });
+
+
+
+ // call input..
+ if (this.pid !== false) {
+ // child can exit before 1we get this far..
+ if (this.listeners.input) {
+ print("Trying to call listeners");
+ try {
+ this.write(this.listeners.input.call(this));
+ // this probably needs to be a bit smarter...
+ //but... let's close input now..
+ this.in_ch.close();
+ _this.in_ch = false;
+
+
+
+
+
+ } catch (e) {
+ tidyup();
+ throw e;
+
+ }
+
+ }
+ }
+ // async - if running - return..
+ if (this.async && this.pid) {
+ return this;
+ }
+
+ // start mainloop if not async..
+
+ if (this.pid !== false) {
+ if (this.debug) {
+ print("starting main loop");
+ }
+
+ this.ctx = isSeed ? new GLib.MainLoop.c_new (null, false) : GLib.MainLoop.new (null, false);;
+ this.ctx.run(false); // wait fore exit?
+
+ //print("main_loop done!");
+ } else {
+ tidyup(); // tidyup get's called in main loop.
+ }
+
+ if (this.exceptions && this.result != 0) {
+ this.toString = function() { return this.stderr; };
+ throw this; // we throw self...
+ }
+
+ // finally throw, or return self..
+
+ return this;
+
+ },
+ /**
+ * write to stdin of process
+ * @arg str {String} string to write to stdin of process
+ * @returns GLib.IOStatus (0 == error, 1= NORMAL)
+ */
+ write : function(str) // write a line to
+ {
+ if (!this.in_ch) {
+ return 0; // input is closed
+ }
+ //print("write: " + str);
+ // NEEDS GIR FIX! for return value.. let's ignore for the time being..
+ //var ret = {};
+ //var res = this.in_ch.write_chars(str, str.length, ret);
+ var res = this.in_ch.write_chars(str, str.length);
+
+ //print("write_char retunred:" + JSON.stringify(res) + ' ' +JSON.stringify(ret) );
+
+ if (res != GLib.IOStatus.NORMAL) {
+ throw "Write failed";
+ }
+ //return ret.value;
+ return str.length;
+
+ },
+
+ /**
+ * read from pipe and call appropriate listerner and add to output or stderr string.
+ * @arg giochannel to read from.
+ * @returns none
+ */
+ read: function(ch)
+ {
+ var prop = ch == this.out_ch ? 'output' : 'stderr';
+ // print("prop: " + prop);
+ var _this = this;
+
+
+ //print(JSON.stringify(ch, null,4));
+ while (true) {
+
+ var x = {};
+ var status = ch.read_line( x);
+ // print('status: ' +JSON.stringify(status));
+ // print(JSON.stringify(x));
+ switch(status) {
+ case GLib.IOStatus.NORMAL:
+
+ //write(fn, x.str);
+ if (this.listeners[prop]) {
+ this.listeners[prop].call(this, x.str_return);
+ }
+ _this[prop] += x.str_return;
+ if (_this.debug) {
+ print(prop + ':' + x.str_return.replace(/\n/, ''));
+ }
+ if (this.async) {
+ try {
+ if (imports.gi.Gtk.events_pending()) {
+ imports.gi.Gtk.main_iteration();
+ }
+ } catch(e) {
+
+ }
+ }
+
+ //this.ctx.iteration(true);
+ continue;
+ case GLib.IOStatus.AGAIN:
+ //print("Should be called again.. waiting for more data..");
+ return true;
+ break;
+ case GLib.IOStatus.ERROR:
+ case GLib.IOStatus.EOF:
+ return false;
+ break;
+
+ }
+ break;
+ }
+
+ //print("RETURNING");
+ return false; // allow it to be called again..
+ }
+
+};
+/**
+ * @function run
+ *
+ * simple run a process - returns result, or throws stderr result...
+ * @param cfg {Object} see spawn
+ * @return {string} stdout output.
+ */
+function run(cfg) {
+ cfg.exceptions = true;
+ cfg.async = false;
+ var s = new Spawn(cfg);
+ var ret = s.run();
+ return s.output;
+}
+ /*
+// test
+try {
+ Seed.print(run({
+ args: ['ls', '/tmp'],
+ debug : true
+ }));
+} catch (e) { print(JSON.stringify(e)); }
+
+var secs = (new Date()).getSeconds()
+
+try {
+Seed.print(run({
+ args: ['/bin/touch', '/tmp/spawntest-' + secs ],
+ debug : true
+}));
+} catch (e) { print( 'Error: ' + JSON.stringify(e)); }
+
+
+ */
+
projects / gitlive / blobdiff