diff -r 000000000000 -r 2b9f54d14cc2 app-manager/update.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app-manager/update.c	Sat Nov 15 19:04:45 2014 +0000
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2014  J. Ali Harlow <ali@juiblex.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <glib.h>
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+#include <plover/plover.h>
+#include <plover/transaction.h>
+#include <plover/packageset.h>
+#include <plover-gtk/transactionhelper.h>
+#include "app-manager.h"
+
+gboolean update(PloverPackageSet *installed,const char *base)
+{
+    gchar *s;
+    const char *prefix;
+    GError *error=NULL;
+    static PloverTransactionHelper *helper=NULL;
+    if (!helper)
+    {
+	helper=plover_transaction_helper_new(ui);
+	plover_transaction_helper_set_installed(helper,installed);
+	plover_transaction_helper_set_base(helper,base);
+	prefix=plover_transaction_helper_get_prefix(helper,&error);
+	if (error)
+	    g_clear_error(&error);
+	else
+	{
+	    s=g_strconcat(prefix?prefix:"","/var/log/update",NULL);
+	    plover_log_open(s);
+	    g_free(s);
+	}
+	plover_transaction_helper_set_check_vendor(helper,TRUE);
+	g_signal_connect(helper,"close",G_CALLBACK(gtk_main_quit),NULL);
+    }
+    if (!plover_transaction_helper_get_visible(helper))
+    {
+	if (!plover_transaction_helper_update(helper,&error))
+	{
+	    if (g_error_matches(error,PLOVER_GENERAL_ERROR,
+	      PLOVER_GENERAL_ERROR_NO_WORK))
+	    {
+		g_error_free(error);
+		error=g_error_new_literal(PLOVER_GENERAL_ERROR,
+		  PLOVER_GENERAL_ERROR_NO_WORK,
+		  "All relevant updates already applied");
+		plover_transaction_helper_set_error(helper,error,
+		  "Software update");
+	    }
+	    else if (g_error_matches(error,PLOVER_GENERAL_ERROR,
+	      PLOVER_GENERAL_ERROR_REQUIREMENTS_NOT_MET))
+	    {
+		g_error_free(error);
+		error=g_error_new_literal(PLOVER_GENERAL_ERROR,
+		  PLOVER_GENERAL_ERROR_REQUIREMENTS_NOT_MET,
+		  "Updates cannot be applied because some earlier updates are "
+		  "missing. Installing updates in sequence should resolve this "
+		  "problem");
+		plover_transaction_helper_set_error(helper,error,
+		  "Software update failed");
+	    }
+	    else
+		plover_transaction_helper_set_error(helper,error,
+		  "Software update failed");
+	    g_error_free(error);
+	}
+    }
+    plover_transaction_helper_present(helper);
+    return TRUE;
+}