[gcab] gcab: add --version

[Marc-Andre Lureau <malureau src gnome org>]

commit 7349dbf30e27f74ca4323aaed2b53ceee0048b3a
Author: Marc-Andrà Lureau <marcandre lureau gmail com>
Date:   Tue Jan 22 15:12:21 2013 +0100

    gcab: add --version

 gcab.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/gcab.c b/gcab.c
index 846ffc7..cb927c2 100644
--- a/gcab.c
+++ b/gcab.c
@@ -75,12 +75,14 @@ main (int argc, char *argv[])
 
     gchar **args = NULL;
     gchar *change = NULL;
+    int version = 0;
     int nopath = 0;
     int compress = 0;
     int list = 0;
     int create = 0;
     int extract = 0;
     GOptionEntry entries[] = {
+        { "version", 0, 0, G_OPTION_ARG_NONE, &version, N_("Print program version"), NULL },
         { "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, N_("Be verbose"), NULL },
         { "create", 'c', 0, G_OPTION_ARG_NONE, &create, N_("Create archive"), NULL },
         { "extract", 'x', 0, G_OPTION_ARG_NONE, &extract, N_("Extract all files"), NULL },
@@ -103,16 +105,21 @@ main (int argc, char *argv[])
     gchar *s = g_strdup_printf (_("Report bugs to <%s>"), PACKAGE_BUGREPORT);
     g_option_context_set_description (context, s);
     g_free(s);
-    g_option_context_set_summary (context, "\
+    g_option_context_set_summary (context, _("\
 gcab saves many files together into a cabinet archive, and can restore\n\
 individual files from the archive.\
-");
+"));
     g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
     g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
     if (!g_option_context_parse (context, &argc, &argv, &error))
         gcab_error (_("option parsing failed: %s\n"), error->message);
     g_option_context_free(context);
 
+    if (version) {
+        g_printf (PACKAGE_STRING "\n");
+        return 0;
+    }
+
     if ((list + extract + create) != 1)
         gcab_error (_("Please specify a single operation."));