[ontv] Replace system call to tv_find_grabbers with python code

[Olof Kindgren <olki src gnome org>]

commit 164a6a4bd2b419364699d5643c459f244f3a11ce
Author: Olof Kindgren <olki src gnome org>
Date:   Mon Nov 1 17:10:12 2010 +0100

    Replace system call to tv_find_grabbers with python code
    
    tv_find_grabbers is a simple perl script. It's simpler to implement
    a light version directly in python instead of parsing its output.

 ontv/assistant.py |   19 ++++++++++---------
 1 files changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/ontv/assistant.py b/ontv/assistant.py
index 33fcab6..8c8a519 100644
--- a/ontv/assistant.py
+++ b/ontv/assistant.py
@@ -105,17 +105,18 @@ class XMLTVAssistant(gtk.Assistant):
                                       self.__country_combobox_changed, page)
         # Add grabbers which are in path
 
-        cmd = "tv_find_grabbers"
-
         self.grabbers = {}
 
-        if utils.is_in_path(cmd):
-            output = subprocess.Popen([cmd], stdout=subprocess.PIPE).communicate()[0]
-
-            for line in output.split('\n'):
-                parts = line.split('|')
-                if(len(parts)==2):
-                    self.grabbers[parts[1]] = parts[0].split('/')[-1]
+        for dir in os.environ["PATH"].split(':'):
+            if os.access(dir, os.F_OK):
+                files = os.listdir(dir)
+                for file in files:
+                    if file[0:8] =="tv_grab_":
+                        cmd = os.path.join(dir,file)
+                        output = subprocess.Popen([cmd,"--capabilities"], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[0]
+                        if "baseline" in output:
+                            output = subprocess.Popen([cmd,"--description"], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[0].strip()
+                            self.grabbers[output] = file
 
         for country in self.grabbers.keys():
             self.country_combobox.append_text(country)