Support migration in the new shell design.

Some code got duplicated for calendars and tasks.  Made a note to revisit.

svn path=/branches/kill-bonobo/; revision=36560

1 files changed, 339 insertions, 0 deletions

diff --git a/shell/e-shell-migrate.c b/shell/e-shell-migrate.c
new file mode 100644
index 0000000000..9979899563
--- /dev/null
+++ b/shell/e-shell-migrate.c
@@ -0,0 +1,339 @@
+/*
+ * e-shell-migrate.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>  
+ *
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#include "e-shell-migrate.h"
+
+#include <string.h>
+#include <unistd.h>
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <libedataserver/e-xml-utils.h>
+
+#include "e-util/e-bconf-map.h"
+#include "e-util/e-error.h"
+#include "e-util/e-fsutils.h"
+#include "e-util/e-util.h"
+
+#define GCONF_VERSION_KEY	"/apps/evolution/version"
+#define GCONF_LAST_VERSION_KEY	"/apps/evolution/last_version"
+
+static const gchar *
+shell_migrate_get_old_data_dir (void)
+{
+	static gchar *old_data_dir = NULL;
+
+	if (G_UNLIKELY (old_data_dir == NULL))
+		old_data_dir = g_build_filename (
+			g_get_home_dir (), "evolution", NULL);
+
+	return old_data_dir;
+}
+
+static gboolean
+shell_migrate_attempt (EShell *shell,
+                       gint major,
+                       gint minor,
+                       gint micro)
+{
+	GList *modules;
+	gboolean success = TRUE;
+
+	modules = e_shell_list_modules (shell);
+
+	while (success && modules != NULL) {
+		EShellModule *shell_module = modules->data;
+		GError *error = NULL;
+
+		success = e_shell_module_migrate (
+			shell_module, major, minor, micro, &error);
+
+		if (error != NULL) {
+			gint response;
+
+			response = e_error_run (
+				NULL, "shell:upgrade-failed",
+				error->message, NULL);
+
+			if (response == GTK_RESPONSE_CANCEL)
+				success = FALSE;
+
+			g_error_free (error);
+		}
+
+		modules = g_list_next (modules);
+	}
+
+	return success;
+}
+
+static void
+shell_migrate_get_version (gint *major,
+                           gint *minor,
+                           gint *micro)
+{
+	GConfClient *client;
+	const gchar *key;
+	const gchar *old_data_dir;
+	gchar *string;
+
+	old_data_dir = shell_migrate_get_old_data_dir ();
+
+	key = GCONF_VERSION_KEY;
+	client = gconf_client_get_default ();
+	string = gconf_client_get_string (client, key, NULL);
+	g_object_unref (client);
+
+	if (string != NULL) {
+		/* Since 1.4.0 we've kept the version key in GConf. */
+		sscanf (string, "%d.%d.%d", major, minor, micro);
+		g_free (string);
+
+	} else if (!g_file_test (old_data_dir, G_FILE_TEST_IS_DIR)) {
+		/* If the old data directory does not exist,
+		 * it must be a new installation. */
+		*major = 0;
+		*minor = 0;
+		*micro = 0;
+
+	} else {
+		xmlDocPtr doc;
+		xmlNodePtr source;
+		gchar *filename;
+
+		filename = g_build_filename (
+			old_data_dir, "config.xmldb", NULL);
+		doc = e_xml_parse_file (filename);
+		g_free (filename);
+
+		if (doc == NULL)
+			return;
+
+		source = e_bconf_get_path (doc, "/Shell");
+		if (source != NULL) {
+			key = "upgrade_from_1_0_to_1_2_performed";
+			string = e_bconf_get_value (source, key);
+		}
+
+		if (string != NULL && *string == '1') {
+			*major = 1;
+			*minor = 2;
+			*micro = 0;
+		} else {
+			*major = 1;
+			*minor = 0;
+			*micro = 0;
+		}
+
+		g_free (string);
+
+		if (doc != NULL)
+			xmlFreeDoc (doc);
+	}
+}
+
+static gint
+shell_migrate_remove_dir (const gchar *root,
+                          const gchar *path)
+{
+	GDir *dir;
+	const gchar *basename;
+	gchar *filename;
+	gint result = -1;
+
+	/* Recursively removes a directory and its contents. */
+
+	dir = g_dir_open (path, 0, NULL);
+	if (dir == NULL)
+		return -1;
+
+	while ((basename = g_dir_read_name (dir)) != NULL) {
+		filename = g_build_filename (path, basename, NULL);
+
+		/* Make sure we haven't strayed from the evolution dir. */
+		g_return_val_if_fail (strlen (path) >= strlen (root), -1);
+		g_return_val_if_fail (g_str_has_prefix (path, root), -1);
+
+		if (g_file_test (filename, G_FILE_TEST_IS_DIR)) {
+			if (shell_migrate_remove_dir (root, filename) < 0)
+				goto fail;
+		} else {
+			if (g_unlink (filename) < 0)
+				goto fail;
+		}
+
+		g_free (filename);
+		filename = NULL;
+	}
+
+	result = g_rmdir (path);
+
+fail:
+	g_free (filename);
+	g_dir_close (dir);
+
+	return result;
+}
+
+gboolean
+e_shell_migrate_attempt (EShell *shell)
+{
+	GConfClient *client;
+	const gchar *key;
+	const gchar *old_data_dir;
+	gint major, minor, micro;
+	gint last_major, last_minor, last_micro;
+	gint curr_major, curr_minor, curr_micro;
+	gboolean migrated = FALSE;
+	gchar *string;
+
+	g_return_val_if_fail (E_IS_SHELL (shell), FALSE);
+
+	old_data_dir = shell_migrate_get_old_data_dir ();
+
+	if (sscanf (BASE_VERSION, "%d.%d", &curr_major, &curr_minor) != 2) {
+		g_warning ("Could not parse BASE_VERSION (%s)", BASE_VERSION);
+		return TRUE;
+	}
+
+	curr_micro = atoi (UPGRADE_REVISION);
+
+	shell_migrate_get_version (&major, &minor, &micro);
+
+	if (!(curr_major > major ||
+		(curr_major == major && curr_minor > minor) ||
+		(curr_minor == minor && curr_micro > micro)))
+		goto check_old;
+
+	/* If upgrading from < 1.5, we need to copy most data from
+	 * ~/evolution to ~/.evolution.  Make sure we have the disk
+	 * space for it before proceeding. */
+	if (major == 1 && minor < 5) {
+		glong avail;
+		glong usage;
+
+		usage = e_fsutils_usage (old_data_dir);
+		avail = e_fsutils_avail (g_get_home_dir ());
+		if (usage >= 0 && avail >= 0 && avail < usage) {
+			gchar *need;
+			gchar *have;
+
+			need = g_strdup_printf (_("%ld KB"), usage);
+			have = g_strdup_printf (_("%ld KB"), avail);
+
+			e_error_run (
+				NULL, "shell:upgrade-nospace",
+				need, have, NULL);
+
+			g_free (need);
+			g_free (have);
+
+			_exit (EXIT_SUCCESS);
+		}
+	}
+
+	if (!shell_migrate_attempt (shell, major, minor, micro))
+		_exit (EXIT_SUCCESS);
+
+	/* Record a successful migration. */
+	client = gconf_client_get_default ();
+	string = g_strdup_printf ("%d.%d.%d", major, minor, micro);
+	gconf_client_set_string (client, GCONF_VERSION_KEY, string, NULL);
+	g_object_unref (client);
+	g_free (string);
+
+	migrated = TRUE;
+
+check_old:
+
+	key = GCONF_LAST_VERSION_KEY;
+	client = gconf_client_get_default ();
+
+	/* Try to retrieve the last migrated version from GConf. */
+	string = gconf_client_get_string (client, key, NULL);
+	if (migrated || string == NULL || sscanf (string, "%d.%d.%d",
+		&last_major, &last_minor, &last_micro) != 3) {
+		last_major = major;
+		last_minor = minor;
+		last_micro = micro;
+	}
+	g_free (string);
+
+	/* If the last migrated version was old, check for stuff to remove. */
+	if (last_major == 1 && last_minor < 5 &&
+		g_file_test (old_data_dir, G_FILE_TEST_IS_DIR)) {
+
+		gint response;
+
+		string = g_strdup_printf (
+			"%d.%d.%d", last_major, last_minor, last_micro);
+		response = e_error_run (
+			NULL, "shel:upgrade-remove-1-4", string, NULL);
+		g_free (string);
+
+		switch (response) {
+			case GTK_RESPONSE_OK:  /* delete */
+				response = e_error_run (
+					NULL,
+					"shell:upgrade-remove-1-4-confirm",
+					NULL);
+				if (response == GTK_RESPONSE_OK)
+					shell_migrate_remove_dir (
+						old_data_dir, old_data_dir);
+				else
+					break;
+				/* fall through */
+
+			case GTK_RESPONSE_ACCEPT:  /* keep */
+				last_major = curr_major;
+				last_minor = curr_minor;
+				last_micro = curr_micro;
+				break;
+
+			default:
+				break;
+		}
+	} else {
+		last_major = curr_major;
+		last_minor = curr_minor;
+		last_micro = curr_micro;
+	}
+
+	string = g_strdup_printf (
+		"%d.%d.%d", last_major, last_minor, last_micro);
+	gconf_client_set_string (client, key, string, NULL);
+	g_free (string);
+
+	g_object_unref (client);
+
+	return TRUE;
+}
+
+GQuark
+e_shell_migrate_error_quark (void)
+{
+	static GQuark quark = 0;
+
+	if (G_UNLIKELY (quark == 0))
+		quark = g_quark_from_static_string (
+			"e-shell-migrate-error-quark");
+
+	return quark;
+}