Port logic for deploying a "backup" app

rattail_fabric2/core.py

@@ -35,6 +35,9 @@ import six
 from mako.template import Template
 
 
+UNSPECIFIED = object()
+
+
 def is_link(c, path, use_sudo=False):
     """
     Return True if the given path is a symlink on the current remote host.
@@ -186,6 +189,9 @@ class Deployer(object):
     def full_path(self, local_path):
         return '{}/{}'.format(self.deploy_path, local_path)
 
+    def local_exists(self, local_path):
+        return os.path.exists(self.full_path(local_path))
+
     def deploy(self, c, local_path, remote_path, context={}, **kwargs):
         local_path = self.full_path(local_path)
         if local_path.endswith('.template'):
@@ -204,6 +210,10 @@ class Deployer(object):
         kwargs['use_sudo'] = True
         deploy_site(c, self, local_path, name, **kwargs)
 
+    def backup_app(self, c, envname='backup', *args, **kwargs):
+        from rattail_fabric2.backup import deploy_backup_app
+        deploy_backup_app(c, self, envname, *args, **kwargs)
+
 
 def make_deploy(deploy_path, last_segment='deploy'):
     """