Ignore subsequent lines of output in 'clangd --version' (#21)

Fixes clangd/vscode-clangd#396

src/index.ts

@@ -339,7 +339,7 @@ async function installed(clangdPath: string): Promise<semver.Range> {
       throw new Error(`Cannot compare vendor's clangd version: ${output}`);
   }
   // Some vendors add trailing ~patchlevel, ignore this.
-  const rawVersion = output.substr(pos + prefix.length).split(/ |~/, 1)[0];
+  const rawVersion = output.substr(pos + prefix.length).split(/\s|~/, 1)[0];
   return new semver.Range(rawVersion, loose);
 }
 

test/assets/fake-clangd-16/clangd

@@ -0,0 +1,8 @@
+#!/bin/sh
+if [ X"$1" = X"--version" ]; then
+  echo "clangd version 16.0.0"
+  echo "Features: linux"
+else
+  echo "Unexpected usage"
+  exit 1
+fi

test/index.ts

@@ -8,7 +8,8 @@ import * as tmp from 'tmp-promise';
 import * as install from '../src/index';
 
 const oldClangd = process.cwd() + '/test/assets/fake-clangd-5/clangd';
-const newClangd = process.cwd() + '/test/assets/fake-clangd-15/clangd';
+const newClangdV15 = process.cwd() + '/test/assets/fake-clangd-15/clangd';
+const newClangdV16 = process.cwd() + '/test/assets/fake-clangd-16/clangd';
 const unversionedClangd =
     process.cwd() + '/test/assets/fake-clangd-unversioned/clangd';
 const appleClangd = process.cwd() + '/test/assets/apple-clangd-5/clangd';
@@ -191,7 +192,14 @@ test('update: from 5 to 10', async (assert, ui) => {
 });
 
 test('update: from 15 to 10', async (assert, ui) => {
-  ui.clangdPath = newClangd;
+  ui.clangdPath = newClangdV15;
+  await install.checkUpdates(true, ui);
+
+  assert.deepEqual(ui.events, [/*up-to-date*/ 'info']);
+});
+
+test('update: from 16 to 10', async (assert, ui) => {
+  ui.clangdPath = newClangdV16;
   await install.checkUpdates(true, ui);
 
   assert.deepEqual(ui.events, [/*up-to-date*/ 'info']);
@@ -257,7 +265,7 @@ test('prepare: old clangd installed, new unavailable', async (assert, ui) => {
 });
 
 test('prepare: new clangd installed', async (assert, ui) => {
-  ui.clangdPath = newClangd;
+  ui.clangdPath = newClangdV15;
   const status = await install.prepare(ui, true);
   await status.background;