From: Peter Palfrader <peter@palfrader.org>
Date: Wed, 8 May 2013 09:14:53 +0000 (+0200)
Subject: Replace the target tarfile atomically
X-Git-Url: https://git.adam-barratt.org.uk/?a=commitdiff_plain;h=caed4e8a72ed8ee23236d1b9d6829dd935f599a5;p=mirror%2Fdsa-puppet.git

Replace the target tarfile atomically
---

diff --git a/modules/porterbox/files/setup-dchroot b/modules/porterbox/files/setup-dchroot
index db27d5a15..6fa9e66c3 100755
--- a/modules/porterbox/files/setup-dchroot
+++ b/modules/porterbox/files/setup-dchroot
@@ -231,4 +231,6 @@ chroot "$rootdir" apt-get install -y --no-install-recommends zsh locales-all bui
 rm -f "$rootdir/etc/apt/sources.list" "$rootdir/etc/apt/sources.list.d/*"
 umount "$rootdir/sys" || true
 
-(cd "$rootdir" && tar caf "$target" .)
+tartmp=$(tempfile --directory "$basedir" --suffix=".tar.gz")
+cleanup+=("rm -f $tartmp")
+(cd "$rootdir" && tar caf "$tartmp" . && mv "$tartmp" "$target")