bundles/bird: support arch linux

bundles/bird/items.py

@@ -1,5 +1,10 @@
+if node.os == 'arch':
+    filename = '/etc/bird.conf'
+else:
+    filename = '/etc/bird/bird.conf'
+
 files = {
-    '/etc/bird/bird.conf': {
+    filename: {
         'content_type': 'mako',
         'triggers': {
             'svc_systemd:bird:reload',
@@ -10,8 +15,7 @@ files = {
 svc_systemd = {
     'bird': {
         'needs': {
-            'file:/etc/bird/bird.conf',
+            f'file:{filename}',
-            'pkg_apt:bird2',
         },
     },
 }

bundles/bird/metadata.py

@@ -5,7 +5,20 @@ from bundlewrap.metadata import atomic
 defaults = {
     'apt': {
         'packages': {
-            'bird2': {},
+            'bird2': {
+                'needed_by': {
+                    'svc_systemd:bird',
+                },
+            },
+        },
+    },
+    'pacman': {
+        'packages': {
+            'bird': {
+                'needed_by': {
+                    'svc_systemd:bird',
+                },
+            },
         },
     },
     'sysctl': {