From 22f079869b7586bcef4b77b6601376be2bd1e61d Mon Sep 17 00:00:00 2001
From: Dave Reisner <dreisner@archlinux.org>
Date: Sat, 18 Nov 2017 08:14:00 -0500
Subject: Avoid corrupting caches when network is unavailable

This removes the use of a tempfile entirely, and only updates the cache
when `git ls-remote` succeeds.

Based on a PR by polygamma:

https://github.com/falconindy/asp/pull/20
---
 remote.inc.sh | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/remote.inc.sh b/remote.inc.sh
index 01031e0..226d566 100644
--- a/remote.inc.sh
+++ b/remote.inc.sh
@@ -1,12 +1,11 @@
 __remote_refcache_update() {
-  local remote=$1 cachefile=$ASPCACHE/remote-$remote
+  local remote=$1 cachefile=$ASPCACHE/remote-$remote refs
 
-  # shellcheck disable=SC2064
-  trap "rm -f '$cachefile~'" RETURN
+  refs=$(git ls-remote "$remote" 'refs/heads/packages/*') ||
+      log_fatal "failed to update remote $remote"
 
-  git ls-remote "$remote" 'refs/heads/packages/*' |
-      awk '{ sub(/refs\/heads\//, "", $2); print $2 }' >"$cachefile~" &&
-          mv "$cachefile"{~,}
+  printf '%s' "$refs" |
+      awk '{ sub(/refs\/heads\//, "", $2); print $2 }' >"$cachefile"
 }
 
 __remote_refcache_get() {
-- 
cgit v1.2.3-54-g00ecf