Rewrote license activation to use a lock to prevent race-conditions.

unity-command/acquire_lock.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Script to acquire a Docker-based lock for Unity image retagging
+# Usage: acquire_lock.sh <lockName>
+
+LOCK_NAME="$1"
+TIMEOUT=10
+WAIT_TIME=0.2
+if [ -z "$LOCK_NAME" ]; then
+    echo "Error: LOCK_NAME parameter is required"
+    exit 1
+fi
+
+echo "Acquiring Docker lock '$LOCK_NAME' (timeout 10s)..."
+
+# First, wait for any existing lock to be released
+START_TS=$(date +%s)
+while docker image ls --format '{{.Repository}}:{{.Tag}}' | grep -qx "$LOCK_NAME"; do
+    NOW_TS=$(date +%s)
+    ELAPSED=$((NOW_TS - START_TS))
+    if [ "$ELAPSED" -ge $TIMEOUT ]; then
+        echo "Lock '$LOCK_NAME' still held after ${ELAPSED}s; proceeding anyway."
+        break
+    fi
+    echo "Lock '$LOCK_NAME' is held by another job. Waiting $WAIT_TIME seconds... (${ELAPSED}s elapsed)"
+    sleep $WAIT_TIME
+done
+
+# Now create our lock
+docker pull hello-world
+docker tag hello-world "$LOCK_NAME"
+echo "Lock acquired: $LOCK_NAME"