Add --version CLI argument and return version in InitializeResult (#44)

Author: nemethf

pylsp/__main__.py

@@ -14,6 +14,7 @@
 
 from .python_lsp import (PythonLSPServer, start_io_lang_server,
                          start_tcp_lang_server)
+from ._version import __version__
 
 LOG_FORMAT = "%(asctime)s {0} - %(levelname)s - %(name)s - %(message)s".format(
     time.localtime().tm_zone)
@@ -57,6 +58,10 @@ def add_arguments(parser):
         help="Increase verbosity of log output, overrides log config file"
     )
 
+    parser.add_argument(
+        '-V', '--version', action='version', version='%(prog)s v' + __version__
+    )
+
 
 def main():
     parser = argparse.ArgumentParser()

pylsp/python_lsp.py

@@ -14,6 +14,7 @@
 from . import lsp, _utils, uris
 from .config import config
 from .workspace import Workspace
+from ._version import __version__
 
 log = logging.getLogger(__name__)
 
@@ -225,7 +226,13 @@ def watch_parent_process(pid):
             self.watching_thread.daemon = True
             self.watching_thread.start()
         # Get our capabilities
-        return {'capabilities': self.capabilities()}
+        return {
+            'capabilities': self.capabilities(),
+            'serverInfo': {
+                'name': 'pylsp',
+                'version': __version__,
+            },
+        }
 
     def m_initialized(self, **_kwargs):
         self._hook('pylsp_initialized')