Method spawnServer

src/languageService.ts:27–52

(client: LanguageClient, rPath: string, args: readonly string[], options: CommonOptions & { cwd: string })

    }

    private spawnServer(client: LanguageClient, rPath: string, args: readonly string[], options: CommonOptions & { cwd: string }): DisposableProcess {
        const childProcess = spawn(rPath, args, options);
        const pid = childProcess.pid || -1;
        client.outputChannel.appendLine(`R Language Server (${pid}) started`);
        childProcess.stderr.on('data', (chunk: Buffer) => {
            client.outputChannel.appendLine(chunk.toString());
        });
        childProcess.on('exit', (code, signal) => {
            client.outputChannel.appendLine(`R Language Server (${pid}) exited ` +
                (signal ? `from signal ${signal}` : `with exit code ${code || 'null'}`));
            if (code !== 0) {
                if (code === 10) {
                    // languageserver is not installed.
                    void promptToInstallRPackage(
                        'languageserver', 'lsp.promptToInstall', options.cwd,
                        'R package {languageserver} is required to enable R language service features such as code completion, function signature, find references, etc. Do you want to install it?',
                        'You may need to reopen an R file to start the language service after the package is installed.'
                    );
                } else {
                    client.outputChannel.show();
                }
            }
            void client.stop();
        });
        return childProcess;
    }

    private async createClient(selector: DocumentFilter[],
        cwd: string, workspaceFolder: WorkspaceFolder | undefined, outputChannel: OutputChannel): Promise<LanguageClient> {