[rygel/wip/dvd: 44/56] wip: Port DVDParser to Subprocess

[Jens Georg <jensgeorg src gnome org>]

commit 741d6265e6c1956aa65ac2561059f12fb9f5b002
Author: Jens Georg <mail jensge org>
Date:   Sun Aug 9 04:18:02 2015 +0200

    wip: Port DVDParser to Subprocess
    
    Signed-off-by: Jens Georg <mail jensge org>

 .../rygel-media-export-dvd-parser.vala             |   89 ++++++-------------
 1 files changed, 28 insertions(+), 61 deletions(-)
---
diff --git a/src/plugins/media-export/rygel-media-export-dvd-parser.vala 
b/src/plugins/media-export/rygel-media-export-dvd-parser.vala
index f9af718..43b6f1f 100644
--- a/src/plugins/media-export/rygel-media-export-dvd-parser.vala
+++ b/src/plugins/media-export/rygel-media-export-dvd-parser.vala
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Jens Georg <mail jensge org>.
+ * Copyright (C) 2013,2015 Jens Georg <mail jensge org>.
  *
  * Author: Jens Georg <mail jensge org>
  *
@@ -58,68 +58,35 @@ internal class Rygel.DVDParser : GLib.Object {
                                          Xml.ParserOption.NOWARNING);
         }
 
-        Pid pid;
-        int stdout_fd;
-
         try {
-            Process.spawn_async_with_pipes (null,
-                                            { "/usr/bin/lsdvd",
-                                              "-Ox",
-                                              "-x",
-                                              "-q",
-                                              this.file.get_path (),
-                                              null },
-                                            null,
-                                            SpawnFlags.DO_NOT_REAP_CHILD |
-                                            SpawnFlags.STDERR_TO_DEV_NULL,
-                                            null,
-                                            out pid,
-                                            null,
-                                            out stdout_fd);
-            var data = new StringBuilder ();
-            var io_channel = new IOChannel.unix_new (stdout_fd);
-            var io_watch = io_channel.add_watch (IOCondition.IN |
-                                                 IOCondition.PRI,
-                                                 () => {
-                string line;
-
-                try {
-                    io_channel.read_to_end (out line, null);
-                    data.append (line);
-                } catch (Error error) { }
-
-                return true;
-            });
-
-            uint child_watch = 0;
-            child_watch = ChildWatch.add (pid, () => {
-                Source.remove (child_watch);
-                Source.remove (io_watch);
-                Process.close_pid (pid);
-
-                get_information.callback ();
-            });
-
-            yield;
-
-            try {
-                this.cache_file.replace_contents (data.str.data,
-                                                  null,
-                                                  false,
-                                                  FileCreateFlags.NONE,
-                                                  null);
-            } catch (Error rc_error) {
-                debug ("Failed to cache lsdvd output: %s", rc_error.message);
+            string output = null;
+            var process = new Subprocess (SubprocessFlags.STDERR_SILENCE,
+                                          "/usr/bin/lsdvd",
+                                          "-Ox",
+                                          "-x",
+                                          "-q",
+                                          this.file.get_path (),
+                                          null);
+            yield process.communicate_utf8_async (null, null, out output, null);
+            if (process.get_if_exited () && process.get_exit_status () == 0) {
+                yield this.cache_file.replace_contents_async (output.data,
+                                                              null,
+                                                              false,
+                                                              FileCreateFlags.NONE,
+                                                              null,
+                                                              null);
+
+                return Xml.Parser.read_memory (output,
+                                               output.length,
+                                               null,
+                                               null,
+                                               Xml.ParserOption.NOERROR |
+                                               Xml.ParserOption.NOWARNING);
+            } else {
+                warning ("lsdvd did die or file is not a DVD");
             }
-
-            return Xml.Parser.read_memory (data.str,
-                                           (int) data.len,
-                                           null,
-                                           null,
-                                           Xml.ParserOption.NOERROR |
-                                           Xml.ParserOption.NOWARNING);
-        } catch (SpawnError error) {
-            debug ("Failed to run lsdvd: %s", error.message);
+        } catch (Error error) {
+            warning ("Failed to run lsdvd: %s", error.message);
         }
 
         return null;