[gnome-shell] main: allow session mode to be specified in the environment

[Ray Strode <halfline src gnome org>]

commit 43cffd7c4a0e0d38e2f2c75c58c866b31f6f9b0d
Author: Ray Strode <rstrode redhat com>
Date:   Tue Jan 7 13:14:31 2014 -0500

    main: allow session mode to be specified in the environment
    
    Specifying the session mode on the command-line doesn't play
    well with session management (since the saved session desktop
    file well either drop the specified session mode, or force it
    always, even if the user picked a different mode at the login
    screen)
    
    This commit adds support for specifying the session mode via an
    enviroment variable. For now, keep the old command line interface
    for backward compatibility
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720894

 src/main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 79161b6..99494a0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -380,6 +380,8 @@ main (int argc, char **argv)
   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
   textdomain (GETTEXT_PACKAGE);
 
+  session_mode = (char *) g_getenv ("GNOME_SHELL_SESSION_MODE");
+
   ctx = meta_get_option_context ();
   g_option_context_add_main_entries (ctx, gnome_shell_options, GETTEXT_PACKAGE);
   g_option_context_add_group (ctx, g_irepository_get_option_group ());