This patch adds a "guix gc" button to the low disk space notification
that 'gsd-housekeeping' emits.

diff --git a/plugins/housekeeping/gsd-disk-space.c b/plugins/housekeeping/gsd-disk-space.c
index bd3437e..89027d8 100644
--- a/plugins/housekeeping/gsd-disk-space.c
+++ b/plugins/housekeeping/gsd-disk-space.c
@@ -546,6 +546,21 @@ empty_trash_callback (NotifyNotification *n,
         notify_notification_close (n, NULL);
 }
 
+static void
+guix_gc_callback (NotifyNotification *n,
+                  const char         *action)
+{
+        const gchar *argv[] = { "guix", "gc", NULL };
+
+        g_assert (action != NULL);
+        g_assert (strcmp (action, "run-guix-gc") == 0);
+
+        g_spawn_async (NULL, (gchar **) argv, NULL, G_SPAWN_SEARCH_PATH,
+                       NULL, NULL, NULL, NULL);
+
+        notify_notification_close (n, NULL);
+}
+
 static void
 on_notification_closed (NotifyNotification *n)
 {
@@ -591,6 +606,13 @@ ldsm_notify (const char *summary,
                                                 g_free);
         }
 
+        notify_notification_add_action (notification,
+                                        "run-guix-gc",
+                                        _("Collect Unused Guix Items"),
+                                        (NotifyActionCallback) guix_gc_callback,
+                                        NULL,
+                                        NULL);
+
         has_trash = ldsm_mount_has_trash (mount_path);
 
         if (has_trash) {
32c78320ac3f8d51'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/chicken.scm'>
<input type='hidden' name='id' value='f6b4d395fd321d43fd548ba832c78320ac3f8d51'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=f6b4d395fd321d43fd548ba832c78320ac3f8d51'>root</a>/<a href='/guix/log/gnu?id=f6b4d395fd321d43fd548ba832c78320ac3f8d51'>gnu</a>/<a href='/guix/log/gnu/packages?id=f6b4d395fd321d43fd548ba832c78320ac3f8d51'>packages</a>/<a href='/guix/log/gnu/packages/chicken.scm?id=f6b4d395fd321d43fd548ba832c78320ac3f8d51'>chicken.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/chicken.scm?id=f6b4d395fd321d43fd548ba832c78320ac3f8d51&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-02-09 21:00:37 +0100'>2020-02-09</span></td><td><a href='/guix/commit/gnu/packages/chicken.scm?id=7f6cb6bbac181a11859283922037e374a82035db'>gnu: chicken: Update to 5.1.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/chicken.scm (chicken): Update to 5.1.0.
[propagated-inputs]: Add gcc-toolchain.

Signed-off-by: Julien Lepiller &lt;julien@lepiller.eu&gt;
</span></span></td><td>Ekaitz Zarraga</td></tr>
<tr><td><span title='2020-02-09 21:00:11 +0100'>2020-02-09</span></td><td><a href='/guix/commit/gnu/packages/chicken.scm?id=2846aec2f7d53b9244ad55c1436437843287426a'>gnu: chicken: Move to a separate module.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/scheme.scm (chicken): Move to chicken.scm.
* gnu/packages/chicken.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

Signed-off-by: Julien Lepiller &lt;julien@lepiller.eu&gt;
</span></span></td><td>Ekaitz Zarraga</td></tr>