aboutsummaryrefslogblamecommitdiffstats
path: root/shell/e-shell-migrate.c
blob: cc3036619eb18dc1a333401c74676c53fb7d5753 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526













                                                                    
                                                                             







                                                        
                  





                                       
                                  
                                

                          

                     


                                                              






































































































































































































































































































































































































































































































                                                                                             





                                     
                          
                        

                                
                                                   
                                                      
 



                                                        
















                                                                           

                                                              

                                     

                                                                    



                                      
                                                                
                                                               

                                                      
                                                                



                                             
                                                  





                       

                                         




                                       

                      
                                
                                                  
                                                             





                                                                      

                                                                


                           
         

 




                                    
                                 
















                                                                                    
                             



                          
                                              




                                                          
                       





                                                  


                                       
                     

                            







                                                         
                                                  







                                                                              
                                                                  
 



                                                                        



                                                                   

                                                              
                                                                                    

                               



                                                                

                                                                
                                                                          






                                     










                                                                     




                                                                
                                           











                                                                         













                                                       
/*
 * 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 <errno.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-alert-dialog.h"
#include "e-util/e-file-utils.h"
#include "e-util/e-util.h"

#include "es-event.h"

#define GCONF_VERSION_KEY   "/apps/evolution/version"
#define GCONF_LAST_VERSION_KEY  "/apps/evolution/last_version"

/******************** Begin XDG Base Directory Migration ********************/

/* These are the known EShellBackend names as of Evolution 3.0 */
static const gchar *shell_backend_names[] =
    { "addressbook", "calendar", "mail", "memos", "tasks", NULL };

static gboolean
shell_xdg_migrate_rename (const gchar *old_filename,
                          const gchar *new_filename)
{
    gboolean success = TRUE;

    if (g_file_test (old_filename, G_FILE_TEST_EXISTS)) {
        g_print ("  mv %s %s\n", old_filename, new_filename);
        if (g_rename (old_filename, new_filename) < 0) {
            g_printerr ("  FAILED: %s\n", g_strerror (errno));
            success = FALSE;
        }
    }

    return success;
}

static gboolean
shell_xdg_migrate_rmdir (const gchar *dirname)
{
    gboolean success = TRUE;

    if (g_file_test (dirname, G_FILE_TEST_IS_DIR)) {
        g_print ("  rmdir %s\n", dirname);
        if (g_rmdir (dirname) < 0) {
            g_printerr ("  FAILED: %s\n", g_strerror (errno));
            success = FALSE;
        }
    }

    return success;
}

static void
shell_xdg_migrate_process_corrections (GHashTable *corrections)
{
    GHashTableIter iter;
    gpointer old_filename;
    gpointer new_filename;

    g_hash_table_iter_init (&iter, corrections);

    while (g_hash_table_iter_next (&iter, &old_filename, &new_filename)) {
        gboolean is_directory;

        is_directory = g_file_test (old_filename, G_FILE_TEST_IS_DIR);

        /* If the old filename is a directory and the new filename
         * is NULL, treat it as a request to remove the directory. */
        if (is_directory && new_filename == NULL)
            shell_xdg_migrate_rmdir (old_filename);
        else
            shell_xdg_migrate_rename (old_filename, new_filename);

        g_hash_table_iter_remove (&iter);
    }
}

static gboolean
shell_xdg_migrate_move_contents (const gchar *src_directory,
                                 const gchar *dst_directory)
{
    GDir *dir;
    GHashTable *corrections;
    const gchar *basename;

    dir = g_dir_open (src_directory, 0, NULL);
    if (dir == NULL)
        return FALSE;

    /* This is to avoid renaming files which we're iterating over the
     * directory.  POSIX says the outcome of that is unspecified. */
    corrections = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) g_free);

    g_mkdir_with_parents (dst_directory, 0700);

    while ((basename = g_dir_read_name (dir)) != NULL) {
        gchar *old_filename;
        gchar *new_filename;

        old_filename = g_build_filename (src_directory, basename, NULL);
        new_filename = g_build_filename (dst_directory, basename, NULL);

        g_hash_table_insert (corrections, old_filename, new_filename);
    }

    g_dir_close (dir);

    shell_xdg_migrate_process_corrections (corrections);
    g_hash_table_destroy (corrections);

    /* It's tempting to want to remove the source directory here.
     * Don't.  We might be iterating over the source directory's
     * parent directory, and removing the source directory would
     * screw up the iteration. */

    return TRUE;
}

static void
shell_xdg_migrate_cache_dir (EShell *shell,
                             const gchar *old_base_dir)
{
    const gchar *new_cache_dir;
    gchar *old_cache_dir;
    gchar *old_filename;
    gchar *new_filename;

    old_cache_dir = g_build_filename (old_base_dir, "cache", NULL);
    new_cache_dir = e_get_user_cache_dir ();

    g_print ("Migrating cached data\n");

    g_mkdir_with_parents (new_cache_dir, 0700);

    old_filename = g_build_filename (old_cache_dir, "http", NULL);
    new_filename = g_build_filename (new_cache_dir, "http", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    /* Try to remove the old cache directory.  Good chance this will
     * fail on the first try, since E-D-S puts stuff here too. */
    shell_xdg_migrate_rmdir (old_cache_dir);

    g_free (old_cache_dir);
}

static void
shell_xdg_migrate_config_dir_common (EShell *shell,
                                     const gchar *old_base_dir,
                                     const gchar *backend_name)
{
    const gchar *user_config_dir;
    gchar *old_config_dir;
    gchar *new_config_dir;
    gchar *old_filename;
    gchar *new_filename;

    user_config_dir = e_get_user_config_dir ();

    old_config_dir = g_build_filename (old_base_dir, backend_name, NULL);
    new_config_dir = g_build_filename (user_config_dir, backend_name, NULL);

    g_mkdir_with_parents (new_config_dir, 0700);

    old_filename = g_build_filename (old_config_dir, "views", NULL);
    new_filename = g_build_filename (new_config_dir, "views", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    old_filename = g_build_filename (old_config_dir, "searches.xml", NULL);
    new_filename = g_build_filename (new_config_dir, "searches.xml", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    /* Subtle name change: config/state --> state.ini */
    old_filename = g_build_filename (old_config_dir, "config", "state", NULL);
    new_filename = g_build_filename (new_config_dir, "state.ini", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    g_free (old_config_dir);
    g_free (new_config_dir);
}

static void
shell_xdg_migrate_config_dir_calendar (EShell *shell,
                                       const gchar *old_base_dir)
{
    const gchar *user_config_dir;
    gchar *old_config_dir;
    gchar *new_config_dir;
    gchar *old_filename;
    gchar *new_filename;

    user_config_dir = e_get_user_config_dir ();

    old_config_dir = g_build_filename (old_base_dir, "calendar", NULL);
    new_config_dir = g_build_filename (user_config_dir, "calendar", NULL);

    old_filename = g_build_filename (old_config_dir, "config", "TaskPad", NULL);
    new_filename = g_build_filename (new_config_dir, "TaskPad", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    old_filename = g_build_filename (old_config_dir, "config", "MemoPad", NULL);
    new_filename = g_build_filename (new_config_dir, "MemoPad", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    g_free (old_config_dir);
    g_free (new_config_dir);
}

static void
shell_xdg_migrate_config_dir_mail (EShell *shell,
                                   const gchar *old_base_dir)
{
    const gchar *user_config_dir;
    gchar *old_config_dir;
    gchar *new_config_dir;
    gchar *old_filename;
    gchar *new_filename;

    user_config_dir = e_get_user_config_dir ();

    old_config_dir = g_build_filename (old_base_dir, "mail", NULL);
    new_config_dir = g_build_filename (user_config_dir, "mail", NULL);

    old_filename = g_build_filename (old_config_dir, "filters.xml", NULL);
    new_filename = g_build_filename (new_config_dir, "filters.xml", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    old_filename = g_build_filename (old_config_dir, "vfolders.xml", NULL);
    new_filename = g_build_filename (new_config_dir, "vfolders.xml", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    /* I hate this file.  GtkHtml uses style properties for fonts. */
    old_filename = g_build_filename (old_config_dir, "config", "gtkrc-mail-fonts", NULL);
    new_filename = g_build_filename (new_config_dir, "gtkrc-mail-fonts", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    /* Everything else in the "config" directory just should be
     * per-folder ETree files recording the expanded state of mail
     * threads.  Rename this directory to "folders". */
    old_filename = g_build_filename (old_config_dir, "config", NULL);
    new_filename = g_build_filename (new_config_dir, "folders", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    g_free (old_config_dir);
    g_free (new_config_dir);
}

static void
shell_xdg_migrate_config_dir_cleanup (EShell *shell,
                                      const gchar *old_base_dir,
                                      const gchar *backend_name)
{
    gchar *dirname;

    dirname = g_build_filename (
        old_base_dir, backend_name, "config", NULL);

    shell_xdg_migrate_rmdir (dirname);

    g_free (dirname);
}

static void
shell_xdg_migrate_config_dir (EShell *shell,
                              const gchar *old_base_dir)
{
    const gchar *old_config_dir;
    const gchar *new_config_dir;
    gchar *old_filename;
    gchar *new_filename;
    gint ii;

    g_print ("Migrating config data\n");

    /* Some files are common to all shell backends. */
    for (ii = 0; shell_backend_names[ii] != NULL; ii++)
        shell_xdg_migrate_config_dir_common (
            shell, old_base_dir, shell_backend_names[ii]);

    /* Handle backend-specific files. */
    shell_xdg_migrate_config_dir_calendar (shell, old_base_dir);
    shell_xdg_migrate_config_dir_mail (shell, old_base_dir);

    /* Remove leftover "config" directories. */
    for (ii = 0; shell_backend_names[ii] != NULL; ii++)
        shell_xdg_migrate_config_dir_cleanup (
            shell, old_base_dir, shell_backend_names[ii]);

    /*** Miscellaneous configuration files. ***/

    old_config_dir = old_base_dir;
    new_config_dir = e_get_user_config_dir ();

    /* Subtle name change: datetime-formats --> datefime-formats.ini */
    old_filename = g_build_filename (old_config_dir, "datetime-formats", NULL);
    new_filename = g_build_filename (new_config_dir, "datetime-formats.ini", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);

    /* Subtle name change: printing --> printing.ini */
    old_filename = g_build_filename (old_config_dir, "printing", NULL);
    new_filename = g_build_filename (new_config_dir, "printing.ini", NULL);
    shell_xdg_migrate_rename (old_filename, new_filename);
    g_free (old_filename);
    g_free (new_filename);
}

static void
shell_xdg_migrate_data_dir (EShell *shell,
                            const gchar *old_base_dir)
{
    GDir *dir;
    GHashTable *corrections;
    const gchar *basename;
    const gchar *old_data_dir;
    const gchar *new_data_dir;
    gchar *src_directory;
    gchar *dst_directory;

    g_print ("Migrating local user data\n");

    old_data_dir = old_base_dir;
    new_data_dir = e_get_user_data_dir ();

    /* The mail hierarchy is complex and Camel doesn't distinguish
     * between user data files and disposable cache files, so just
     * move everything to the data directory for now.  We'll sort
     * it out sometime down the road. */

    src_directory = g_build_filename (old_data_dir, "mail", NULL);
    dst_directory = g_build_filename (new_data_dir, "mail", NULL);

    dir = g_dir_open (src_directory, 0, NULL);
    if (dir == NULL)
        goto skip_mail;

    /* This is to avoid removing directories while we're iterating
     * over the parent directory.  POSIX says the outcome of that
     * is unspecified. */
    corrections = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) g_free);

    /* Iterate over the base CamelProvider directories. */
    while ((basename = g_dir_read_name (dir)) != NULL) {
        gchar *provider_src_directory;
        gchar *provider_dst_directory;

        provider_src_directory =
            g_build_filename (src_directory, basename, NULL);
        provider_dst_directory =
            g_build_filename (dst_directory, basename, NULL);

        if (!g_file_test (provider_src_directory, G_FILE_TEST_IS_DIR)) {
            g_free (provider_src_directory);
            g_free (provider_dst_directory);
            continue;
        }

        shell_xdg_migrate_move_contents (
            provider_src_directory, provider_dst_directory);

        g_hash_table_insert (corrections, provider_src_directory, NULL);
        g_free (provider_dst_directory);
    }

    g_dir_close (dir);

    /* Remove the old base CamelProvider directories. */
    shell_xdg_migrate_process_corrections (corrections);
    g_hash_table_destroy (corrections);

skip_mail:

    g_free (src_directory);
    g_free (dst_directory);

    /* We don't want to move the source directory directly because the
     * destination directory may already exist with content.  Instead
     * we want to merge the content of the source directory into the
     * destination directory.
     *
     * For example, given:
     *
     *    $(src_directory)/A   and   $(dst_directory)/B
     *    $(src_directory)/C
     *
     * we want to end up with:
     *
     *    $(dst_directory)/A
     *    $(dst_directory)/B
     *    $(dst_directory)/C
     *
     * Any name collisions will be left in the source directory.
     */

    src_directory = g_build_filename (old_data_dir, "signatures", NULL);
    dst_directory = g_build_filename (new_data_dir, "signatures", NULL);

    shell_xdg_migrate_move_contents (src_directory, dst_directory);
    shell_xdg_migrate_rmdir (src_directory);

    g_free (src_directory);
    g_free (dst_directory);

    /* Move all remaining regular files to the new data directory. */

    dir = g_dir_open (old_data_dir, 0, NULL);
    if (dir == NULL)
        return;

    /* This is to avoid renaming files while we're iterating over the
     * directory.  POSIX says the outcome of that is unspecified. */
    corrections = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) g_free);

    while ((basename = g_dir_read_name (dir)) != NULL) {
        gchar *old_filename;
        gchar *new_filename;

        old_filename = g_build_filename (old_data_dir, basename, NULL);
        new_filename = g_build_filename (new_data_dir, basename, NULL);

        /* If we encounter a directory, try removing it.  This
         * will only work if the directory is empty, so there's
         * no risk of data loss. */
        if (g_file_test (old_filename, G_FILE_TEST_IS_DIR)) {
            shell_xdg_migrate_rmdir (old_filename);
            g_free (old_filename);
            g_free (new_filename);
            continue;
        }

        g_hash_table_insert (corrections, old_filename, new_filename);
    }

    g_dir_close (dir);

    shell_xdg_migrate_process_corrections (corrections);
    g_hash_table_destroy (corrections);
}

static void
shell_migrate_to_xdg_base_dirs (EShell *shell)
{
    const gchar *home_dir;
    gchar *old_base_dir;

    g_return_if_fail (E_IS_SHELL (shell));

    /* XXX This blocks, but it's all just local file
     *     renames so it should be nearly instantaneous. */

    home_dir = g_get_home_dir ();
    old_base_dir = g_build_filename (home_dir, ".evolution", NULL);

    /* Is there even anything to migrate? */
    if (!g_file_test (old_base_dir, G_FILE_TEST_IS_DIR))
        goto exit;

    shell_xdg_migrate_cache_dir (shell, old_base_dir);
    shell_xdg_migrate_config_dir (shell, old_base_dir);
    shell_xdg_migrate_data_dir (shell, old_base_dir);

    /* Try to remove the old base directory.  Good chance this will
     * fail on the first try, since Evolution puts stuff here too. */
    g_rmdir (old_base_dir);

exit:
    g_free (old_base_dir);
}

/********************* End XDG Base Directory Migration *********************/

static gboolean
shell_migrate_attempt (EShell *shell,
                       gint major,
                       gint minor,
                       gint micro)
{
    GtkWindow *parent;
    GList *backends;
    gboolean success = TRUE;

    parent = e_shell_get_active_window (shell);
    backends = e_shell_get_shell_backends (shell);

    /* New user accounts have nothing to migrate. */
    if (major == 0 && minor == 0 && micro == 0)
        return TRUE;

    /* We only support migrating from version 2 now. */
    if (major < 2) {
        gchar *version;
        gint response;

        version = g_strdup_printf ("%d.%d", major, minor);
        response = e_alert_run_dialog_for_args (
            parent, "shell:upgrade-version-too-old",
            version, NULL);
        g_free (version);

        return (response == GTK_RESPONSE_OK);
    }

    /* Ask each of the shell backends to migrate their own data.
     * XXX If something fails the user may end up with only partially
     *     migrated data.  Need transaction semantics here, but how? */
    while (success && backends != NULL) {
        EShellBackend *shell_backend = backends->data;
        GError *error = NULL;

        success = e_shell_backend_migrate (
            shell_backend, major, minor, micro, &error);

        if (error != NULL) {
            gint response;

            response = e_alert_run_dialog_for_args (
                parent, "shell:upgrade-failed",
                error->message, NULL);

            success = (response == GTK_RESPONSE_OK);

            g_error_free (error);
        }

        backends = g_list_next (backends);
    }

    return success;
}

static void
shell_migrate_get_version (EShell *shell,
                           gint *major,
                           gint *minor,
                           gint *micro)
{
    GConfClient *client;
    const gchar *key;
    gchar *string;

    key = GCONF_VERSION_KEY;
    client = e_shell_get_gconf_client (shell);
    string = gconf_client_get_string (client, key, NULL);

    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 {
        /* Otherwise, assume it's a new installation. */
        *major = 0;
        *minor = 0;
        *micro = 0;
    }
}

static void
change_dir_modes (const gchar *path)
{
    GDir *dir;
    GError *err = NULL;
    const gchar *file = NULL;

    dir = g_dir_open (path, 0, &err);
    if (err) {
        g_warning ("Error opening directory %s: %s \n", path, err->message);
        g_clear_error (&err);
        return;
    }

    while ((file = g_dir_read_name (dir))) {
        gchar *full_path = g_build_filename (path, file, NULL);

        if (g_file_test (full_path, G_FILE_TEST_IS_DIR))
            change_dir_modes (full_path);

        g_free (full_path);
    }

    g_chmod (path, 0700);
    g_dir_close (dir);
}

static void
fix_folder_permissions (const gchar *data_dir)
{
    struct stat sb;

    if (g_stat (data_dir, &sb) == -1) {
        g_warning ("error stat: %s \n", data_dir);
        return;
    }

    if (((guint32) sb.st_mode & 0777) != 0700)
        change_dir_modes (data_dir);
}

gboolean
e_shell_migrate_attempt (EShell *shell)
{
    ESEvent *ese;
    GConfClient *client;
    const gchar *key;
    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);

    client = e_shell_get_gconf_client (shell);

    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 (shell, &major, &minor, &micro);

    /* Migrate to XDG Base Directories first, so shell backends
     * don't have to deal with legacy data and cache directories. */
    shell_migrate_to_xdg_base_dirs (shell);

    /* This sets the folder permissions to S_IRWXU if needed */
    if (curr_major <= 2 && curr_minor <= 30)
        fix_folder_permissions (e_get_user_data_dir ());

    if (!(curr_major > major ||
        (curr_major == major && curr_minor > minor) ||
        (curr_major == major && curr_minor == minor && curr_micro > micro)))
        goto check_old;

    if (!shell_migrate_attempt (shell, major, minor, micro))
        _exit (EXIT_SUCCESS);

    /* Record a successful migration. */
    string = g_strdup_printf (
        "%d.%d.%d", curr_major, curr_minor, curr_micro);
    gconf_client_set_string (client, GCONF_VERSION_KEY, string, NULL);
    g_free (string);

    migrated = TRUE;

check_old:

    key = GCONF_LAST_VERSION_KEY;

    /* 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);

    string = g_strdup_printf (
        "%d.%d.%d", last_major, last_minor, last_micro);
    gconf_client_set_string (client, key, string, NULL);
    g_free (string);

    /** @Event: Shell attempted upgrade
     * @Id: upgrade.done
     * @Target: ESMenuTargetState
     *
     * This event is emitted whenever the shell successfully attempts
     * an upgrade.
     **/
    ese = es_event_peek ();
    e_event_emit (
        (EEvent *) ese, "upgrade.done",
        (EEventTarget *) es_event_target_new_upgrade (
        ese, curr_major, curr_minor, curr_micro));

    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;
}