bundles/basic: support configuring /etc/environment

bundles/basic/files/environment

@@ -0,0 +1,3 @@
+% for k, v in sorted(node.metadata.get('environment', {}).items()):
+${k}=${v}
+% endfor

bundles/basic/items.py

@@ -19,6 +19,14 @@ files = {
     '/etc/motd': {
         'content': '',
     },
+    '/etc/environment': {
+        'content_type': 'mako',
+        'before': {
+            'action:',
+            'pkg_apt:',
+            'pkg_pacman:',
+        },
+    },
 }
 
 locale_needs = set()