Add support for conditional blocks when running with script caching (#4603)

skyvern/services/script_service.py

@@ -4,6 +4,7 @@ import hashlib
 import importlib.util
 import json
 import os
+import re
 import uuid
 from dataclasses import dataclass
 from datetime import datetime
@@ -2026,7 +2027,17 @@ async def run_script(
         context.workflow_run_id = workflow_run_id
         context.organization_id = organization_id
 
-    # run the script as subprocess; pass the parameters and run_id to the script
+    # Check if script contains conditional blocks (not supported in CLI execution)
+    # The marker "# === CONDITIONAL:" is generated by _build_block_statement() for conditional blocks.
+    with open(path, encoding="utf-8") as f:
+        script_content = f.read()
+    if re.search(r"# === CONDITIONAL:", script_content):
+        raise Exception(
+            "This script contains conditional blocks which are not supported in CLI execution. "
+            "Conditional blocks require the workflow engine's DAG traversal to properly evaluate "
+            "branch conditions at runtime. Please run this workflow through the API instead."
+        )
+
     # Dynamically import the script at the given path
     spec = importlib.util.spec_from_file_location("user_script", path)
     if not spec or not spec.loader: