From 95de8f428f21296640949afe06ea6f088b225303 Mon Sep 17 00:00:00 2001
From: Alex Crawford <alex.crawford@coreos.com>
Date: Mon, 11 Jul 2016 13:32:52 -0700
Subject: [PATCH] tag_release: operate on copy of manifest.xml

Without this, repo will sometimes empty the contents of manifest.xml.
---
 tag_release | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tag_release b/tag_release
index b7f077ef34..e4f21881a3 100755
--- a/tag_release
+++ b/tag_release
@@ -82,9 +82,12 @@ if [[ -L release.xml ]]; then
 fi
 
 # Generate a release manifest with all revisions pinned
-repo manifest -o release.xml -r
+tmp=$(mktemp --suffix repo)
+trap "rm --force ${tmp}" EXIT
+repo manifest -o ${tmp} -r
 # double check because repo may not exit with non-zero on failure
-[[ -s release.xml ]] || die "repo failed to generate release.xml"
+[[ -s ${tmp} ]] || die "repo failed to generate release.xml (${tmp})"
+mv ${tmp} release.xml
 git add release.xml
 
 # Generate a branch manifest, unpinning any branched projects.