From 3e8f769d8d4b6bceb758f7bc68240967acde2911 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Mon, 25 Jun 2018 14:26:49 +0200
Subject: bin/seed-build-list: -c new: exit-code=0 for unavailable lock

---
 bin/seed-build-list | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/bin/seed-build-list b/bin/seed-build-list
index 7905a17..31deb08 100755
--- a/bin/seed-build-list
+++ b/bin/seed-build-list
@@ -19,6 +19,9 @@ usage() {
   >&2 echo '  -a|--auto:'
   >&2 echo '    Automatically reschedule packages which have run-time'
   >&2 echo '    dependencies that are not available anywhere.'
+  >&2 echo '  -c|--cron-exit:'
+  >&2 echo '    Exit with 0 if not getting a lock - makes the script'
+  >&2 echo '    suitable for a crontab.'
   >&2 echo '  -h|--help:'
   >&2 echo '    Show this help and exit.'
   >&2 echo '  -i|--ignore $package:'
@@ -39,8 +42,9 @@ tmp_dir=$(mktemp -d 'tmp.seed-build-list.XXXXXXXXXX' --tmpdir)
 trap "rm -rf --one-file-system '${tmp_dir:?}'" EXIT
 
 eval set -- "$(
-  getopt -o ahi:m:np:w \
+  getopt -o achi:m:np:w \
     --long auto \
+    --long cron-exit \
     --long help \
     --long ignore: \
     --long mirror: \
@@ -58,6 +62,7 @@ touch "${tmp_dir}/ignore-packages"
 auto=false
 update=true
 wait_for_lock='-n'
+lock_error=1
 
 if [ -r "${base_dir}/conf/seed-ignore-packages" ]; then
   cp "${base_dir}/conf/seed-ignore-packages" "${tmp_dir}/ignore-packages"
@@ -69,6 +74,9 @@ do
     -a|--auto)
       auto=true
     ;;
+    -c|--cron-exit)
+      lock_error=0
+    ;;
     -h|--help)
       usage 0
     ;;
@@ -121,13 +129,13 @@ if ${update}; then
   exec 9> "${sanity_check_lock_file}"
   if ! verbose_flock -s ${wait_for_lock} 9; then
     >&2 echo 'Cannot get sanity-check lock.'
-    exit 1
+    exit ${lock_error}
   fi
 
   exec 8> "${build_list_lock_file}"
   if ! verbose_flock ${wait_for_lock} 8; then
     >&2 echo 'Cannot get build-list lock.'
-    exit 1
+    exit ${lock_error}
   fi
 fi
 
-- 
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