check versions before uploading to S3

aztec-up/terraform/main.tf

@@ -76,11 +76,33 @@ resource "null_resource" "upload_public_directory" {
   }
 
   provisioner "local-exec" {
-    command = <<EOT
-      # Upload latest version to root
-      aws s3 sync ../bin s3://${aws_s3_bucket.install_bucket.id}/
-
-      # Create a version directory and upload files there
+    interpreter = ["/bin/bash", "-c"]
+    command     = <<EOT
+      # Function to compare versions
+      version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; }
+
+      # Read the current version from S3
+      CURRENT_VERSION=$(aws s3 cp s3://${aws_s3_bucket.install_bucket.id}/VERSION - 2>/dev/null || echo "0.0.0")
+
+      # Validate that var.VERSION is a valid semver
+      if [[ ! "${var.VERSION}" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+        echo "Warning: ${var.VERSION} is not a valid semver version. Skipping version comparison."
+      else
+        # Check if new version is greater than current version
+        if version_gt "${var.VERSION}" "$CURRENT_VERSION"; then
+          echo "Uploading new version ${var.VERSION}"
+
+          # Upload new version to root
+          aws s3 sync ../bin s3://${aws_s3_bucket.install_bucket.id}/
+
+          # Update VERSION file
+          echo "${var.VERSION}" | aws s3 cp - s3://${aws_s3_bucket.install_bucket.id}/VERSION
+        else
+          echo "New version ${var.VERSION} is not greater than current version $CURRENT_VERSION. Skipping root upload."
+        fi
+      fi
+
+      # Always create a version directory and upload files there
       aws s3 sync ../bin s3://${aws_s3_bucket.install_bucket.id}/${var.VERSION}/
     EOT
   }