cache flush script

frontend/README.md

@@ -282,4 +282,5 @@ To learn React, check out the [React documentation](https://reactjs.org/).
 
 ```
 ./scripts/deploy-s3.sh
+./scripts/flush-cache-prod.sh DIST.cloudfront.net
 ```

frontend/scripts/flush-cache-prod.sh

@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+#
+# Name: flush-cache-prod.sh
+#
+# Usage: ./flush-cache-prod.sh "<distribution-domain-name>"
+#
+# Description:
+#   1. Looks up a CloudFront distribution by matching the input domain name
+#      (e.g., "d123abcxyz.cloudfront.net") to the distribution's DomainName field.
+#   2. Issues a cache invalidation for all files ("/*").
+#   3. Monitors the invalidation until it is completed.
+#
+# Requirements:
+#   - AWS CLI installed and configured
+#   - jq installed (for JSON parsing)
+#   - A CloudFront distribution whose DomainName matches the supplied input
+
+set -euo pipefail
+
+if [ "$#" -ne 1 ]; then
+  echo "Usage: $0 \"<distribution-domain-name>\""
+  echo "Example: $0 \"d123abcxyz.cloudfront.net\""
+  exit 1
+fi
+
+DISTRIBUTION_DOMAIN="$1"
+
+echo "Looking up the distribution by domain name: \"$DISTRIBUTION_DOMAIN\" ..."
+
+# Step 1: Query the distribution list, matching the DomainName to DISTRIBUTION_DOMAIN
+DISTRIBUTION_ID=$(
+  aws cloudfront list-distributions --output json \
+  | jq -r --arg DOMAIN "$DISTRIBUTION_DOMAIN" '
+      .DistributionList.Items[]
+      | select(.DomainName == $DOMAIN)
+      | .Id
+    '
+)
+
+if [ -z "$DISTRIBUTION_ID" ]; then
+  echo "Error: No distribution found with domain name: \"$DISTRIBUTION_DOMAIN\""
+  exit 1
+fi
+
+echo "Found distribution ID: $DISTRIBUTION_ID"
+
+# Step 2: Issue a cache invalidation for all files
+echo "Creating invalidation for all paths (/*) ..."
+INVALIDATION_JSON=$(
+  aws cloudfront create-invalidation \
+    --distribution-id "$DISTRIBUTION_ID" \
+    --paths "/*"
+)
+
+# Extract the invalidation ID from the result
+INVALIDATION_ID=$(echo "$INVALIDATION_JSON" | jq -r '.Invalidation.Id')
+
+echo "Invalidation created. ID: $INVALIDATION_ID"
+
+# Step 3: Monitor the invalidation until it completes
+echo "Monitoring invalidation status..."
+
+while true; do
+  STATUS=$(
+    aws cloudfront get-invalidation \
+      --distribution-id "$DISTRIBUTION_ID" \
+      --id "$INVALIDATION_ID" \
+      --output json \
+    | jq -r '.Invalidation.Status'
+  )
+
+  echo "Current status: $STATUS"
+
+  if [ "$STATUS" == "Completed" ]; then
+    echo "Invalidation $INVALIDATION_ID has completed!"
+    break
+  fi
+
+  # Sleep for a few seconds before checking again (avoid spamming AWS)
+  sleep 5
+done
+
+echo "Cache flush complete."