Gmer4Lfe
2c3f0b9cb1
A direct arr_cache_write() call mid-rescan wrote a partial snapshot that looked like real data loss to every consumer of the cache. The guard now lives in arr_cache_write() itself so every caller is protected, not just arr_get_tracked_data(). arr_rescan_monitor.sh closes the resulting gap for rescans triggered outside arr_full_rescan.sh's own trigger-and-wait path.
98 lines
4.5 KiB
Bash
Executable File
98 lines
4.5 KiB
Bash
Executable File
#!/bin/bash
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# ==============================================================================================
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# ========================= Arr Rescan Monitor ==================================================
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# ==============================================================================================
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#
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# PURPOSE
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# ─────────────────────────────────────────────────────────────────────────────
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# Waits for an already-active rescan-type command (RescanFolders/RescanSeries/RescanMovie,
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# DownloadedXScan, RefreshX — see ARR_RESCAN_COMMANDS in common.sh) on the given arr to finish,
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# then refreshes the shared tracked-data cache (arr_cache_write) with the real post-scan
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# numbers. Triggers nothing itself — for watching a rescan that was already started some
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# other way (manual API call, arr's own UI, another script).
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#
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# Exists because arr_cache_write() now refuses to write while a rescan is active for that arr
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# (2026-07-17 — a direct cache write mid-scan read as real data loss to every consumer of the
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# cache, e.g. check_tracked_count_floor, instead of what it was: an in-flight scan). That
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# guard protects the cache, but it also means nothing writes the real number through once the
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# scan finishes unless something is watching for completion — arr_full_rescan.sh already does
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# this for scans it triggers itself; this tool covers everything else.
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#
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# ==============================================================================================
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# RUNTIME MODES
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# ==============================================================================================
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#
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# arr_rescan_monitor.sh lidarr
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# Wait for lidarr's active rescan (if any) to finish, then refresh its cache.
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# Exits immediately if no rescan is currently active — nothing to wait for.
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#
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# arr_rescan_monitor.sh lidarr 3600
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# Override the default 2-hour wait ceiling (second positional arg, seconds).
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#
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# arr_rescan_monitor.sh lidarr --status
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# Show whether a rescan is currently active and the cache's current age, no waiting.
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#
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# arr_rescan_monitor.sh lidarr --dry-run
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# Show what would be waited on without actually waiting or writing the cache.
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#
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# ==============================================================================================
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$SCRIPT_DIR/../load_config.sh"
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parse_args "$@"
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detect_hosts
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ARR_TYPE="${PARSED_ARGS[0]:-}"
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TIMEOUT="${PARSED_ARGS[1]:-7200}"
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case "$ARR_TYPE" in
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lidarr|sonarr|radarr) ;;
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*) error "Usage: arr_rescan_monitor.sh lidarr|sonarr|radarr [timeout_seconds] [--status] [--dry-run]"; exit 1 ;;
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esac
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url_var="${ARR_TYPE^^}_URL"; key_var="${ARR_TYPE^^}_API_KEY"
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URL="${!url_var:-}"; KEY="${!key_var:-}"
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VER="${ARR_API_VERSION[$ARR_TYPE]}"
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require_var "$url_var"
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require_var "$key_var"
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ACTIVE=$(arr_active_rescan_command "$ARR_TYPE" "$URL" "$KEY" "$VER")
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CACHE_AGE=$(arr_cache_age_seconds "$ARR_TYPE")
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if [[ "$SHOW_STATUS" == true ]]; then
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info "${ARR_TYPE^} active rescan: ${ACTIVE:-none}"
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info "${ARR_TYPE^} cache age: $(( CACHE_AGE / 60 )) minutes"
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exit 0
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fi
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if [[ -z "$ACTIVE" ]]; then
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info "No active rescan on ${ARR_TYPE^} — nothing to wait for."
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exit 0
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fi
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if [[ "$DRY_RUN" == true ]]; then
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warn "DRY RUN — would wait for ${ARR_TYPE^}'s active $ACTIVE (timeout ${TIMEOUT}s), then refresh its cache"
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exit 0
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fi
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info "Waiting for ${ARR_TYPE^}'s active $ACTIVE to finish (timeout ${TIMEOUT}s)..."
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if ! arr_wait_for_active_rescan "$ARR_TYPE" "$URL" "$KEY" "$VER" "$TIMEOUT"; then
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error "Timed out after ${TIMEOUT}s waiting for ${ARR_TYPE^}'s rescan — cache not refreshed. Re-run once it finishes, or it'll pick up naturally next time something calls arr_get_tracked_data()."
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exit 1
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fi
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ENDPOINT="${ARR_LIBRARY_ENDPOINT[$ARR_TYPE]}"
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EXPR="${ARR_TRACKED_COUNT_EXPR[$ARR_TYPE]}"
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ITEMS=$(curl -sf --max-time 60 -H "X-Api-Key: $KEY" "${URL}/api/${VER}/${ENDPOINT}" 2>/dev/null)
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TOTAL=$(echo "$ITEMS" | jq "$EXPR" 2>/dev/null)
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if [[ -z "$ITEMS" || -z "$TOTAL" || "$TOTAL" == "null" ]]; then
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error "${ARR_TYPE^} rescan finished but couldn't fetch fresh library data — cache not refreshed"
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exit 1
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fi
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arr_cache_write "$ARR_TYPE" "$ITEMS"
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success "${ARR_TYPE^} rescan finished — cache refreshed, tracked: ${TOTAL}"
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notify "${ARR_TYPE^} rescan finished on $(hostname) — cache refreshed, tracked: ${TOTAL}" "Arr Rescan Monitor" "normal"
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