From 789721946a35e3d2228179ac3585d35fbd5ff8b5 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Thu, 15 Dec 2016 15:15:28 +0100
Subject: only join if necessary

---
 burn-audio-cd | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/burn-audio-cd b/burn-audio-cd
index 45659c5..d5915e4 100755
--- a/burn-audio-cd
+++ b/burn-audio-cd
@@ -1,7 +1,16 @@
 #!/bin/bash
 
-shncue "$@" > cd.cue
-shnjoin "$@"
+if [ ! -r cd.cue ] \
+  || [ ! -r joined.wav ] \
+  || [ "$(ls -1t cd.cue joined.wav "$@" \
+          | head -n2 \
+          | sort \
+          | tr '\n' ' ')" \
+       != "cd.cue joined.wav " ]
+then
+  shncue "$@" > cd.cue
+  shnjoin "$@"
+fi
 
 su -c '
   /etc/rc.d/boinc stop
-- 
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