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-rwxr-xr-xdocker/run_cron.sh62
1 files changed, 62 insertions, 0 deletions
diff --git a/docker/run_cron.sh b/docker/run_cron.sh
new file mode 100755
index 0000000..db7ae26
--- /dev/null
+++ b/docker/run_cron.sh
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "cgitize" project.
+# For details, see https://github.com/egor-tensin/cgitize.
+# Distributed under the MIT License.
+
+set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+schedule_to_cron() {
+ local schedule
+ for schedule; do
+ case "$schedule" in
+ 15min) echo '*/15 * * * *' ;;
+ hourly) echo '0 * * * *' ;;
+ daily) echo '0 0 * * *' ;;
+ weekly) echo '0 0 * * 1' ;;
+ monthly) echo '0 0 1 * *' ;;
+ *)
+ echo "$schedule"
+ ;;
+ esac
+ done
+}
+
+make_task_script() {
+ echo "#!/bin/bash
+cd -- "$( pwd )" && $( printf -- ' %q' "$@" )"
+}
+
+setup_cron_task() {
+ local schedule
+ schedule="${SCHEDULE:-once}"
+
+ if [ "$schedule" = once ]; then
+ exec "$@"
+ fi
+
+ schedule="$( schedule_to_cron "$schedule" )"
+
+ make_task_script "$@" > /task.sh
+ chmod +x /task.sh
+
+ if [ -n "$SCHEDULE_ON_START" ]; then
+ # Run the task once when the container is started.
+ /task.sh
+ fi
+
+ local crontab
+ crontab="$schedule /task.sh
+# This is the new crontab."
+
+ echo "$crontab" | crontab -
+ exec crond -f
+}
+
+main() {
+ setup_cron_task "$@"
+}
+
+main "$@"