cli: support sglang version (#17250)

python/sglang/cli/main.py

@@ -2,10 +2,19 @@ import argparse
 
 from sglang.cli.generate import generate
 from sglang.cli.serve import serve
+from sglang.cli.utils import get_git_commit_hash
+from sglang.version import __version__
+
+
+def version(args, extra_argv):
+    print(f"sglang version: {__version__}")
+    print(f"git revision: {get_git_commit_hash()[:7]}")
 
 
 def main():
     parser = argparse.ArgumentParser()
+
+    # complex sub commands
     subparsers = parser.add_subparsers(dest="subcommand", required=True)
 
     serve_parser = subparsers.add_parser(
@@ -22,5 +31,12 @@ def main():
     )
     generate_parser.set_defaults(func=generate)
 
+    # simple commands
+    version_parser = subparsers.add_parser(
+        "version",
+        help="Show the version information.",
+    )
+    version_parser.set_defaults(func=version)
+
     args, extra_argv = parser.parse_known_args()
     args.func(args, extra_argv)