From c2a8b51c390c2cfb411289915e51160cfbf19685 Mon Sep 17 00:00:00 2001
From: Steven Walter <stevenrwalter@gmail.com>
Date: Mon, 7 Jul 2008 21:40:51 -0400
Subject: [PATCH] A simple backup plugin

This plugin registers a pre-hook on revert and creates backup files for
files that have uncommitted changes in them.
---
 plugins/backup.py | 18 ++++++++++++++++++
 yap/__init__.py   |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 plugins/backup.py

diff --git a/plugins/backup.py b/plugins/backup.py
new file mode 100644
index 0000000..fc4dc9d
--- /dev/null
+++ b/plugins/backup.py
@@ -0,0 +1,18 @@
+
+from yap import YapPlugin, YapError
+import os
+
+class BackupPlugin(YapPlugin):
+    def __init__(self, yap):
+        self.yap = yap
+
+    def pre_revert(self, *args, **flags):
+        files = set(args)
+        changed = set(self.yap._get_staged_files() + self.yap._get_unstaged_files())
+        if '-a' in flags:
+            x = changed
+        else:
+            x = files.intersection(changed)
+
+        for f in x:
+            os.system("cp %s %s~" % (f, f))
diff --git a/yap/__init__.py b/yap/__init__.py
index 6a9bff9..9459f2a 100644
--- a/yap/__init__.py
+++ b/yap/__init__.py
@@ -1,2 +1,2 @@
-from yap import Yap
+from yap import Yap, YapError
 from plugin import YapPlugin
-- 
2.11.4.GIT