feat: experimental multihost sync (#1204)

scripts/testing/run-named.sh

@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+#
+# Run a named instance of backrest with its own data directory and ports.
+# Multiple instances can run side-by-side for testing sync, multihost, etc.
+#
+# Usage: ./run-named.sh <name> [backend-port] [vite-port]
+#
+# Examples:
+#   ./run-named.sh alice            # backend :9901, vite :5181
+#   ./run-named.sh bob              # backend :9902, vite :5182
+#   ./run-named.sh alice 9910 5190  # explicit ports
+#
+# Data is stored in /tmp/backrest-<name>/ and persists across runs.
+
+set -euo pipefail
+
+BASEDIR="$(cd "$(dirname "$0")/../.." && pwd)"
+NAME="${1:?Usage: $0 <name> [backend-port] [vite-port]}"
+
+# Derive deterministic ports from name if not provided.
+# Hash the name to a number in a small range to avoid collisions.
+name_hash() {
+  printf '%s' "$1" | cksum | awk '{print $1 % 100}'
+}
+
+OFFSET=$(name_hash "$NAME")
+BACKEND_PORT="${2:-$((9900 + OFFSET))}"
+VITE_PORT="${3:-$((5180 + OFFSET))}"
+
+DATADIR="/tmp/backrest-${NAME}"
+mkdir -p "$DATADIR"
+
+PIDS=()
+
+cleanup() {
+  echo ""
+  echo "Shutting down instance '$NAME'..."
+  for pid in "${PIDS[@]}"; do
+    kill "$pid" 2>/dev/null || true
+  done
+  wait 2>/dev/null || true
+  echo "Done."
+}
+
+trap cleanup EXIT INT TERM
+
+echo "=== backrest instance: $NAME ==="
+echo "  data dir:     $DATADIR"
+echo "  backend:      http://127.0.0.1:${BACKEND_PORT}"
+echo "  webui (vite): http://localhost:${VITE_PORT}"
+echo ""
+
+# Start the Go backend
+(
+  cd "$BASEDIR"
+  go run ./cmd/backrest \
+    -bind-address "127.0.0.1:${BACKEND_PORT}" \
+    -config-file "${DATADIR}/config.json" \
+    -data-dir "${DATADIR}/data"
+) &
+PIDS+=($!)
+
+# Start the vite dev server pointing at this backend
+(
+  cd "$BASEDIR/webui"
+  UI_BACKEND_URL="http://127.0.0.1:${BACKEND_PORT}" \
+    npx vite --port "$VITE_PORT" --strictPort
+) &
+PIDS+=($!)
+
+# Wait for any child to exit — if one dies, the trap cleans up the other.
+wait -n 2>/dev/null || true