Chunk Ctests so we dont run into large number of tests error (#3050)

* Chunk Ctests so we dont run into large number of tests error

* Addressing feedback from copilot

script/launch_tests.sh

@@ -40,20 +40,88 @@ python3 "$SCRIPT_DIR/dependency-parser/main.py" select "$JSON_FILE" origin/devel
 # Path to tests_to_run.json in the same directory
 TEST_FILE="tests_to_run.json"
 
-command=$(python3 -c "
+# Configuration: Adjust these defaults as needed
+# Number of tests per ctest command (can be overridden with CTEST_CHUNK_SIZE env var)
+DEFAULT_CHUNK_SIZE=10
+# Whether to stop on first failure (can be overridden with CTEST_FAIL_FAST env var)
+DEFAULT_FAIL_FAST=false
+
+# Split tests into chunks and run multiple ctest commands
+# Export variables so Python subprocess can access them
+export CHUNK_SIZE=${CTEST_CHUNK_SIZE:-$DEFAULT_CHUNK_SIZE}
+export FAIL_FAST=${CTEST_FAIL_FAST:-$DEFAULT_FAIL_FAST}
+
+python3 -c "
 import json
 import os
+import sys
+import subprocess
+
+CHUNK_SIZE = int(os.environ.get('CHUNK_SIZE', '10'))
+FAIL_FAST = os.environ.get('FAIL_FAST', 'false').lower() == 'true'
+
 with open('$TEST_FILE', 'r') as f:
     data = json.load(f)
     tests = data.get('tests_to_run', [])
-    if tests:
-        # Extract just the filename after the last '/'
-        clean_tests = [os.path.basename(test) for test in tests]
-        print('ctest --output-on-failure -R \"' + '|'.join(clean_tests) + '\"')
-    else:
+    
+    if not tests:
         print('# No tests to run')
-")
+        sys.exit(0)
+    
+    # Extract just the filename after the last '/'
+    clean_tests = [os.path.basename(test) for test in tests]
+    
+    total_tests = len(clean_tests)
+    total_chunks = (total_tests + CHUNK_SIZE - 1) // CHUNK_SIZE
+    
+    print(f'# Total tests to run: {total_tests}')
+    print(f'# Running in {total_chunks} chunk(s) of up to {CHUNK_SIZE} tests each')
+    print(f'# Fail-fast mode: {FAIL_FAST}')
+    print()
+    
+    failed_chunks = []
+    
+    # Split into chunks
+    for i in range(0, total_tests, CHUNK_SIZE):
+        chunk = clean_tests[i:i+CHUNK_SIZE]
+        chunk_num = (i // CHUNK_SIZE) + 1
+        
+        print(f'Running test chunk {chunk_num}/{total_chunks} ({len(chunk)} tests)...')
+        sys.stdout.flush()
+        
+        # Run ctest command, don't raise exception on failure
+        cmd = ['ctest', '--output-on-failure', '-R', '|'.join(chunk)]
+        try:
+            result = subprocess.run(cmd, cwd='$BUILD_DIR', check=False)
+            
+            if result.returncode != 0:
+                failed_chunks.append(chunk_num)
+                print(f'WARNING: Chunk {chunk_num} had test failures (exit code: {result.returncode})')
+                
+                # If fail-fast is enabled, exit immediately
+                if FAIL_FAST:
+                    print(f'FAIL-FAST: Stopping at chunk {chunk_num} due to failures')
+                    sys.exit(1)
+        except Exception as e:
+            print(f'ERROR: Failed to run chunk {chunk_num}: {e}')
+            failed_chunks.append(chunk_num)
+            if FAIL_FAST:
+                sys.exit(1)
+        
+        print()
+        sys.stdout.flush()
+    
+    # Print summary
+    print('=' * 60)
+    if failed_chunks:
+        print(f'SUMMARY: {len(failed_chunks)} of {total_chunks} chunk(s) had failures: {failed_chunks}')
+        print('=' * 60)
+        sys.exit(1)
+    else:
+        print(f'SUMMARY: All {total_chunks} chunk(s) passed successfully!')
+        print('=' * 60)
+        sys.exit(0)
+" 
+PYTHON_EXIT=$?
 
-echo "$command"
-
-eval "$command"
+exit $PYTHON_EXIT