Added command line tool and removed lib folder from gitignore.

util/python_module/sppcmd/common.py

@@ -0,0 +1,51 @@
+
+
+import json
+import logging
+from pathlib import Path
+import shlex
+import subprocess
+import sys
+from typing import Sequence
+
+_project_root = Path('.').absolute()
+
+def get_project_root() -> Path:
+    return _project_root
+
+def set_project_root(path: Path) -> None:
+    global _project_root
+    _project_root = path
+
+def get_config_cache() -> dict:
+    cache_file = get_project_root() / 'cache' / 'config_cache.json'
+    if not cache_file.exists():
+        return {}
+
+    try:
+        with cache_file.open('r') as f:
+            cache = json.load(f)
+            if not isinstance(cache, dict):
+                logging.warning('Config cache is not a dictionary, ignoring it.')
+                return {}
+            return cache
+    except Exception as e:
+        logging.error(f'Error while reading config cache: {e}.')
+        return {}
+
+def require_project_file() -> None:
+    if not (get_project_root() / 'SConstruct').exists():
+        logging.error('This command has to be run inside an existing S++ project folder. Exiting.')
+        sys.exit(1)
+
+def exec_checked(args: Sequence[str], **kwargs) -> None:
+    logging.debug('exec_checked: "%s"', shlex.join(args))
+    subprocess.run(args, stdout=sys.stdout, stderr=sys.stderr, check=True, **kwargs)
+
+def exec_get_output(args: Sequence[str], **kwargs) -> str:
+    logging.debug('exec_get_output: "%s"', shlex.join(args))
+    return subprocess.run(args, text=True, check=True, capture_output=True, **kwargs).stdout
+
+def exec_spp(args: Sequence[str], **kwargs):
+    full_cmd = ('scons', '-s', '--disable_auto_update', *args)
+    exec_checked(full_cmd, **kwargs)