[evolution-data-server] CamelGpgContext: Be aware of gpg2

[Milan Crha <mcrha src gnome org>]

commit b2340c634519fa52de1cb6fa0f36eb35e7bd1a70
Author: Milan Crha <mcrha redhat com>
Date:   Thu Jul 18 11:34:42 2013 +0200

    CamelGpgContext: Be aware of gpg2
    
    There can be installed only gpg2, without old gpg executable, but
    CamelGpgContext was not aware of that and simply failed to do any
    gpg operation due to missing gpg executable.
    
    This was reported as: https://bugzilla.redhat.com/show_bug.cgi?id=985599

 camel/camel-gpg-context.c |   31 +++++++++++++++++++++++++++++--
 1 files changed, 29 insertions(+), 2 deletions(-)
---
diff --git a/camel/camel-gpg-context.c b/camel/camel-gpg-context.c
index 200bc21..d6b7177 100644
--- a/camel/camel-gpg-context.c
+++ b/camel/camel-gpg-context.c
@@ -439,6 +439,33 @@ gpg_ctx_free (struct _GpgCtx *gpg)
        g_free (gpg);
 }
 
+static const gchar *
+gpg_ctx_get_executable_name (void)
+{
+       static gint index = -1;
+       const gchar *names[] = {
+               "gpg",
+               "gpg2",
+               NULL
+       };
+
+       if (index == -1) {
+               for (index = 0; names[index]; index++) {
+                       gchar *path = g_find_program_in_path (names[index]);
+
+                       if (path) {
+                               g_free (path);
+                               break;
+                       }
+               }
+
+               if (!names[index])
+                       index = 0;
+       }
+
+       return names[index];
+}
+
 #ifndef G_OS_WIN32
 
 static const gchar *
@@ -477,7 +504,7 @@ gpg_ctx_get_argv (struct _GpgCtx *gpg,
        gint i;
 
        argv = g_ptr_array_new ();
-       g_ptr_array_add (argv, (guint8 *) "gpg");
+       g_ptr_array_add (argv, (guint8 *) gpg_ctx_get_executable_name ());
 
        g_ptr_array_add (argv, (guint8 *) "--verbose");
        g_ptr_array_add (argv, (guint8 *) "--no-secmem-warning");
@@ -623,7 +650,7 @@ gpg_ctx_op_start (struct _GpgCtx *gpg,
                }
 
                /* run gpg */
-               execvp ("gpg", (gchar **) argv->pdata);
+               execvp (gpg_ctx_get_executable_name (), (gchar **) argv->pdata);
                _exit (255);
        } else if (gpg->pid < 0) {
                g_ptr_array_free (argv, TRUE);