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deer-flow/scripts/wait-for-port.sh

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#!/usr/bin/env bash
#
# wait-for-port.sh - Wait for a TCP port to become available
#
# Usage: ./scripts/wait-for-port.sh <port> [timeout_seconds] [service_name]
#
# Arguments:
# port - TCP port to wait for (required)
# timeout_seconds - Max seconds to wait (default: 60)
# service_name - Display name for messages (default: "Service")
#
# Exit codes:
# 0 - Port is listening
# 1 - Timed out waiting
PORT="${1:?Usage: wait-for-port.sh <port> [timeout] [service_name]}"
TIMEOUT="${2:-60}"
SERVICE="${3:-Service}"
elapsed=0
interval=1
while ! lsof -i :"$PORT" -sTCP:LISTEN -t >/dev/null 2>&1; do
if [ "$elapsed" -ge "$TIMEOUT" ]; then
echo ""
echo "$SERVICE failed to start on port $PORT after ${TIMEOUT}s"
exit 1
fi
printf "\r Waiting for %s on port %s... %ds" "$SERVICE" "$PORT" "$elapsed"
sleep "$interval"
elapsed=$((elapsed + interval))
done
printf "\r %-60s\r" "" # clear the waiting line