Add forbid-download-cache parameter

slapos/recipe/gitclone.py

@@ -126,10 +126,13 @@ class Recipe(object):
     self.name = name
     self.location = options.get('location',
         os.path.join(buildout['buildout']['parts-directory'], name))
-    if options.get('develop') in TRUE_VALUES:
-      self.develop = True
-    else:
-      self.develop = False
+    # Set boolean values
+    for key in ['develop', 'forbid-download-cache']:
+      attribute = key.replace('-', '_')
+      if options.get(key) in TRUE_VALUES:
+        setattr(self, attribute, True)
+      else:
+        setattr(self, attribute, False)
 
     self.networkcache = buildout.get('networkcache', {})
 
@@ -179,10 +182,12 @@ class Recipe(object):
     except CalledProcessError:
       print ("Unable to download from git repository. Trying from network "
           "cache...")
+      if os.path.exists(self.location):
+        shutil.rmtree(self.location)
+      if self.forbid_download_cache:
+        raise UserError('Impossible to clone repository.')
       if not download_network_cached(self.location, self.name, self.revision,
           self.networkcache):
-        if os.path.exists(self.location):
-          shutil.rmtree(self.location)
         raise UserError('Impossible to clone repository and impossible to '
             'download from cache.')