From e4251e63ac983885466c5c5ebfb71e071e8bcfc4 Mon Sep 17 00:00:00 2001
From: makefu <github@syntax-fehler.de>
Date: Mon, 2 May 2016 17:36:16 +0200
Subject: k 3 fetchWallpaper: move only if exists

---
 krebs/3modules/fetchWallpaper.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'krebs/3modules/fetchWallpaper.nix')

diff --git a/krebs/3modules/fetchWallpaper.nix b/krebs/3modules/fetchWallpaper.nix
index 53fe0839..bd3d6d3b 100644
--- a/krebs/3modules/fetchWallpaper.nix
+++ b/krebs/3modules/fetchWallpaper.nix
@@ -42,9 +42,11 @@ let
 
   fetchWallpaperScript = pkgs.writeScript "fetchWallpaper" ''
     #! ${pkgs.bash}/bin/bash
+    set -euf
 
     mkdir -p ${shell.escape cfg.stateDir}
-    curl -s -o ${shell.escape cfg.stateDir}/wallpaper -z ${shell.escape cfg.stateDir}/wallpaper ${shell.escape cfg.url}
+    cd ${shell.escape cfg.stateDir}
+    curl -s -o wallpaper.tmp -z wallpaper ${shell.escape cfg.url} && mv wallpaper.tmp wallpaper
     feh --no-fehbg --bg-scale ${shell.escape cfg.stateDir}/wallpaper
   '';
 
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