43 lines
1.2 KiB
Bash
43 lines
1.2 KiB
Bash
#!/usr/bin/env bash
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# Container entrypoint: run sync.sh once, or in a loop every
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# SYNC_INTERVAL_SECONDS. There's no systemd/cron inside the container, so a
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# simple sleep-loop is the pragmatic choice.
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set -euo pipefail
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: "${SYNC_INTERVAL_SECONDS:=3600}"
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: "${RUN_ONCE:=false}"
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log() { echo "[entrypoint] $(date '+%Y-%m-%d %H:%M:%S') $*"; }
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run_once() {
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/usr/local/bin/sync.sh
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}
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if [[ "$RUN_ONCE" == "true" ]]; then
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log "RUN_ONCE=true - running sync.sh once and exiting"
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run_once
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exit $?
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fi
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log "Starting sync loop (interval: ${SYNC_INTERVAL_SECONDS}s)"
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# Graceful shutdown on docker stop / compose down
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term_handler() {
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log "Received SIGTERM, shutting down"
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exit 0
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}
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trap term_handler SIGTERM SIGINT
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while true; do
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# NOTE: don't inline `run_once` into `if ! run_once; then ...` - inside
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# that then-branch, $? would reflect the (always-0) negated test itself,
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# not run_once's real exit code. Capture it explicitly instead.
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rc=0
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run_once || rc=$?
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if [[ $rc -ne 0 ]]; then
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log "sync.sh failed (exit ${rc}) - will retry after the next interval"
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fi
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log "Sleeping ${SYNC_INTERVAL_SECONDS}s until next sync..."
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sleep "${SYNC_INTERVAL_SECONDS}" &
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wait $!
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done |