default: add support for inline templates

slapos/recipe/template/__init__.py

@@ -29,6 +29,7 @@ import os
 import stat
 import tempfile
 import zc.buildout
+from zc.buildout import UserError
 
 if str is bytes:
     str2bytes = lambda s: s
@@ -72,9 +73,22 @@ class Recipe(object):
 
     def _init(self, name, options):
         self.output = options['output']
-        options_sub = options._sub
-        self.rendered = '$'.join(options_sub(s, None)
-          for s in self._read(options['url']).split('$$'))
+        rendered = options.get('inline')
+        try:
+            url = options['url']
+        except KeyError:
+            if rendered is None:
+                raise
+            if self.md5sum:
+                raise UserError("options 'inline' & 'md5sum' conflict")
+            self.md5sum = True # tell update() to do nothing
+            self.rendered = rendered
+        else:
+            if rendered:
+                raise UserError("options 'inline' & 'url' conflict")
+            options_sub = options._sub
+            self.rendered = '$'.join(options_sub(s, None)
+                for s in self._read(url).split('$$'))
 
     def _read(self, url, *args):
         path, is_temp = zc.buildout.download.Download(