From b205223f638e134bd03f33652e37e1ba91596813 Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.im>
Date: Thu, 5 Feb 2015 09:26:17 +0100
Subject: [PATCH] wallpaper: use a temporary file to save current wallpaper

Otherwise, other utilities (like i3lock) may get a corrupted image.
---
 bin/build-wallpaper | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/bin/build-wallpaper b/bin/build-wallpaper
index 09ebb6e..440863e 100755
--- a/bin/build-wallpaper
+++ b/bin/build-wallpaper
@@ -9,6 +9,7 @@ import os
 import random
 import string
 import optparse
+import tempfile
 
 import xcb
 import xcb.xproto
@@ -82,4 +83,7 @@ for index in range(len(screens)):
 
 # Save
 assert background, "Don't know the size of the display area"
-background.save(options.target)
+with tempfile.NamedTemporaryFile(delete=False,
+        dir=os.path.dirname(os.path.realpath(options.target))) as tmp:
+    background.save(tmp, "jpeg")
+    os.rename(tmp.name, options.target)