Add version reporting to CLI flags and LSP serverInfo

bin/yaml-language-server

@@ -1,3 +1,27 @@
 #!/usr/bin/env node
 
+const version = require('../package.json').version;
+const args = process.argv.slice(2);
+
+if (args.includes('--version') || args.includes('-version')) {
+  console.log(version);
+  process.exit(0);
+}
+
+if (args.includes('--help') || args.includes('-help') || args.includes('-h')) {
+  console.log(`Usage: yaml-language-server [transport]
+
+LSP transport options:
+  --stdio            communicate using standard input/output (stdin/stdout)
+  --node-ipc         communicate using Node IPC
+  --socket=<number>  listen on a TCP socket on the given port number
+
+Other:
+  --version | -version   print product version to the output stream and exit
+  --help | -help | -h    print this help message to the output stream and exit
+`);
+  process.exit(0);
+}
+
+process.env.YAML_LANGUAGE_SERVER_VERSION = version;
 require('../out/server/src/server.js');

src/yamlServerInit.ts

@@ -120,6 +120,10 @@ export class YAMLServerInit {
     registerCommands(commandExecutor, this.connection);
     await this.setupl10nBundle(params);
     return {
+      serverInfo: {
+        name: 'yaml-language-server',
+        version: process.env.YAML_LANGUAGE_SERVER_VERSION || 'unknown',
+      },
       capabilities: {
         textDocumentSync: TextDocumentSyncKind.Incremental,
         completionProvider: { resolveProvider: false },