bowenliang123
de4d6f327a
Track the tsdown watcher pid in .tmp/watch.pid; a new watch kills the previous instance first and the pid file is cleaned up on exit.
37 lines
867 B
Bash
Executable File
37 lines
867 B
Bash
Executable File
#!/usr/bin/env bash
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# Starts tsdown --watch, killing the previous watch instance (pid tracked in .tmp/watch.pid) first.
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set -euo pipefail
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ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
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cd "$ROOT"
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PID_FILE="$ROOT/.tmp/watch.pid"
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mkdir -p "$ROOT/.tmp"
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if [[ -f "$PID_FILE" ]]; then
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old_pid="$(cat "$PID_FILE" 2>/dev/null || true)"
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if [[ "$old_pid" =~ ^[0-9]+$ ]] && kill -0 "$old_pid" 2>/dev/null; then
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echo "killing previous watch (pid $old_pid)"
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kill "$old_pid" 2>/dev/null || true
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for _ in {1..50}; do
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kill -0 "$old_pid" 2>/dev/null || break
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sleep 0.1
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done
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fi
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rm -f "$PID_FILE"
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fi
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tsdown --watch &
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child=$!
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echo "$child" > "$PID_FILE"
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cleanup() {
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kill "$child" 2>/dev/null || true
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if [[ "$(cat "$PID_FILE" 2>/dev/null)" == "$child" ]]; then
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rm -f "$PID_FILE"
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fi
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}
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trap cleanup EXIT INT TERM
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wait "$child"
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