added version cmdline arg

Author: alexandraBara

nodescraper/__init__.py

@@ -23,3 +23,10 @@
 # SOFTWARE.
 #
 ###############################################################################
+
+from importlib.metadata import PackageNotFoundError, version
+
+try:
+    __version__ = version("node-scraper")
+except PackageNotFoundError:
+    __version__ = "unknown"

nodescraper/cli/cli.py

@@ -32,6 +32,7 @@
 import sys
 from typing import Optional
 
+import nodescraper
 from nodescraper.cli.constants import DEFAULT_CONFIG, META_VAR_MAP
 from nodescraper.cli.dynamicparserbuilder import DynamicParserBuilder
 from nodescraper.cli.helper import (
@@ -79,6 +80,12 @@ def build_parser(
         formatter_class=argparse.ArgumentDefaultsHelpFormatter,
     )
 
+    parser.add_argument(
+        "--version",
+        action="version",
+        version=f"%(prog)s {nodescraper.__version__}",
+    )
+
     parser.add_argument(
         "--sys-name", default=platform.node(), help="System name", metavar=META_VAR_MAP[str]
     )