feat: create deployment scripts

get-next-port.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+set -eu
+
+# Port allocation for zero-downtime deployments
+#
+# Reads remote state to determine next available port.
+# State files:
+#   $base/$project/base_port           - starting port number
+#   $base/$project/releases/*/assigned_port - port for each release
+#
+# Algorithm:
+#   1. read base_port (default 3100)
+#   2. find all assigned_port files in releases/
+#   3. return smallest unused port >= base_port
+
+ssh=deploy-peoplesgrocers-website
+base=/home/peoplesgrocers
+project=salience
+
+ssh $ssh "
+set -eu
+
+base=$base
+project=$project
+
+test -d \$base/\$project || { echo 'project dir does not exist' >&2; exit 1; }
+
+# read or initialize base_port
+if test -f \$base/\$project/base_port; then
+	base_port=\$(cat \$base/\$project/base_port)
+else
+	base_port=3100
+	echo \$base_port > \$base/\$project/base_port
+fi
+
+# find all assigned ports
+assigned=\$(find \$base/\$project/releases -name assigned_port -exec cat {} \; 2>/dev/null | sort -n || true)
+
+# find first unused port
+port=\$base_port
+while true; do
+	found=0
+	for p in \$assigned; do
+		test \$p -eq \$port && { found=1; break; }
+	done
+	test \$found -eq 0 && break
+	port=\$((port + 1))
+done
+
+echo \$port
+"