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102 lines
4.4 KiB
102 lines
4.4 KiB
This patch lets GLib's GDesktopAppInfo API watch and notice changes
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to the Nix user and system profiles. That way, the list of available
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applications shown by the desktop environment is immediately updated
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when the user installs or removes any
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(see <https://issues.guix.gnu.org/35594>).
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It does so by monitoring /nix/var/nix/profiles (for changes to the system
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profile) and /nix/var/nix/profiles/per-user/USER (for changes to the user
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profile) as well as /etc/profiles/per-user (for chanes to the user
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environment profile) and crawling their share/applications sub-directory when
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changes happen.
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diff --git a/gio/gdesktopappinfo.c b/gio/gdesktopappinfo.c
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index b779b30..31069f7 100644
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--- a/gio/gdesktopappinfo.c
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+++ b/gio/gdesktopappinfo.c
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@@ -150,6 +150,7 @@ typedef struct
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gchar *alternatively_watching;
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gboolean is_config;
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gboolean is_setup;
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+ gchar *nix_profile_watch_dir;
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GFileMonitor *monitor;
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GHashTable *app_names;
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GHashTable *mime_tweaks;
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@@ -181,6 +182,7 @@ desktop_file_dir_unref (DesktopFileDir *dir)
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{
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desktop_file_dir_reset (dir);
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g_free (dir->path);
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+ g_free (dir->nix_profile_watch_dir);
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g_free (dir);
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}
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}
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@@ -205,6 +207,14 @@ desktop_file_dir_get_alternative_dir (DesktopFileDir *dir)
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{
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gchar *parent;
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+ /* If DIR is a profile, watch the specified directory--e.g.,
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+ * /nix/var/nix/profiles/per-user/$USER/ for the user profile. Do not watch
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+ * ~/.nix-profile or /run/current-system/sw because GFileMonitor does
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+ * not pass IN_DONT_FOLLOW and thus cannot notice any change.
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+ * /etc/profiles/per-user is monitored directly for the same reason. */
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+ if (dir->nix_profile_watch_dir != NULL)
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+ return g_strdup (dir->nix_profile_watch_dir);
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+
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/* If the directory itself exists then we need no alternative. */
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if (g_access (dir->path, R_OK | X_OK) == 0)
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return NULL;
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@@ -250,11 +260,11 @@ desktop_file_dir_changed (GFileMonitor *monitor,
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*
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* If this is a notification for a parent directory (because the
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* desktop directory didn't exist) then we shouldn't fire the signal
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- * unless something actually changed.
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+ * unless something actually changed or it's part of a Nix profile.
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*/
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g_mutex_lock (&desktop_file_dir_lock);
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- if (dir->alternatively_watching)
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+ if (dir->alternatively_watching && dir->nix_profile_watch_dir == NULL)
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{
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gchar *alternative_dir;
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@@ -1556,6 +1566,40 @@ desktop_file_dirs_lock (void)
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for (i = 0; dirs[i]; i++)
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g_ptr_array_add (desktop_file_dirs, desktop_file_dir_new (dirs[i]));
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+ {
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+ /* Monitor the system and user profile under /nix/var/nix/profiles and
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+ * treat modifications to them as if they were modifications to their
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+ * /share sub-directory. */
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+ const gchar *user;
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+ DesktopFileDir *system_profile_dir, *user_profile_dir, *user_env_dir;
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+
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+ system_profile_dir =
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+ desktop_file_dir_new ("/nix/var/nix/profiles/system/sw/share");
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+ system_profile_dir->nix_profile_watch_dir = g_strdup ("/nix/var/nix/profiles");
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+ g_ptr_array_add (desktop_file_dirs, desktop_file_dir_ref (system_profile_dir));
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+
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+ user = g_get_user_name ();
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+ if (user != NULL)
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+ {
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+ gchar *profile_dir, *user_data_dir, *env_dir, *env_data_dir;
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+
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+ profile_dir = g_build_filename ("/nix/var/nix/profiles/per-user", user, NULL);
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+ user_data_dir = g_build_filename (profile_dir, "profile", "share", NULL);
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+ user_profile_dir = desktop_file_dir_new (user_data_dir);
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+ user_profile_dir->nix_profile_watch_dir = profile_dir;
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+
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+ env_dir = g_build_filename ("/etc/profiles/per-user", NULL);
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+ env_data_dir = g_build_filename (env_dir, user, "share", NULL);
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+ user_env_dir = desktop_file_dir_new (env_data_dir);
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+ user_env_dir->nix_profile_watch_dir = env_dir;
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+
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+ g_ptr_array_add (desktop_file_dirs, desktop_file_dir_ref (user_profile_dir));
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+ g_ptr_array_add (desktop_file_dirs, desktop_file_dir_ref (user_env_dir));
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+ g_free (user_data_dir);
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+ g_free (env_data_dir);
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+ }
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+ }
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+
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/* The list of directories will never change after this, unless
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* g_get_user_config_dir() changes due to %G_TEST_OPTION_ISOLATE_DIRS. */
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desktop_file_dirs_config_dir = user_config_dir;
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