build(language-service): add script to build package locally (angular#38103)

This commit adds a script to build @angular/language-service
locally so that it can be consumed by the Angular extension for
local development.

PR Close angular#38103

Author: kyliau

packages/language-service/build.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+set -ex
+
+# This script is used for building the @angular/language-service package locally
+# so that it can be consumed by the Angular extension for local development.
+# Usage: ./build.sh /path/to/vscode-ng-language-service
+
+readonly bazel_bin=$(yarn run -s bazel info bazel-bin)
+readonly extension_repo="$1"
+
+if [[ -z "${extension_repo}" ]]; then
+  echo "Please provide path to the vscode-ng-language-service repo"
+  exit 1
+fi
+
+yarn bazel build --config=release //packages/language-service:npm_package
+pushd "${extension_repo}/server"
+yarn add @angular/language-service@file:"${bazel_bin}/packages/language-service/npm_package"
+popd