make it idempotent

faiproject · Dec 8, 2015 · a853dda · a853dda
1 parent 650b923
commit a853dda
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/examples/simple/scripts/UBUNTU/90-apt b/examples/simple/scripts/UBUNTU/90-apt
@@ -1,8 +1,12 @@
 #! /bin/bash
 
+# check if we already use an external mirror
+grep -q "external mirror" $target/etc/apt/sources.list && exit 0
+
 dist=trusty
 
 cat <<EOM > $target/etc/apt/sources.list
+# external mirror
 deb MIRRORURL $dist main restricted universe multiverse
 deb MIRRORURL $dist-updates main restricted universe multiverse
 deb MIRRORURL $dist-security main restricted universe multiverse