Improve CI caching (#416)

* Adjust linux distro to ubuntu 14.04

* Cache lib directory for speedy builds

* Fix path linking for default extensions

* Update reset

* Reset to head

* Improve caching

* Still run yarn in CI

* Update yarn before install

* Increase cache timeout

* Install vscode from vstar

* Undo data-dir changes to CLI, add back clean, remove unused CI func

* Remove additional flags added

* Remove unused dependency

* Reset vscode install dir so patching always works

scripts/vstar.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+set -euxo pipefail
+
+# Builds a tarfile containing vscode sourcefiles neccessary for CI.
+# Done outside the CI and uploaded to object storage to reduce CI time.
+
+branch=1.32.0
+dir=/tmp/vstar
+outfile=/tmp/vstar-$branch.tar.gz
+rm -rf $dir
+mkdir -p $dir
+
+cd $dir
+git clone https://github.com/microsoft/vscode --branch $branch --single-branch --depth=1
+cd vscode
+
+yarn
+
+npx gulp vscode-linux-x64 --max-old-space-size=32384
+rm -rf extensions build out* test
+cd ..
+mv *-x64/resources/app/extensions ./extensions
+rm -rf *-x64
+tar -czvf $outfile .

scripts/webpack.general.config.js

@@ -3,6 +3,7 @@ const os = require("os");
 const environment = process.env.NODE_ENV || "development";
 const HappyPack = require("happypack");
 const webpack = require("webpack");
+const TerserPlugin = require("terser-webpack-plugin");
 
 const root = path.join(__dirname, "..");
 
@@ -107,6 +108,11 @@ module.exports = (options = {}) => ({
 			id: "ts",
 			threads: Math.max(os.cpus().length - 1, 1),
 			loaders: [{
+				path: "cache-loader",
+				query: {
+					cacheDirectory: path.join(__dirname, "..", ".cache"),
+				},
+			}, {
 				path: "ts-loader",
 				query: {
 					happyPackMode: true,
@@ -121,6 +127,14 @@ module.exports = (options = {}) => ({
 			"process.env.VERSION": `"${process.env.VERSION || ""}"`,
 		}),
 	],
+	optimization: {
+		minimizer: [
+			new TerserPlugin({
+				cache: path.join(__dirname, "..", ".cache", "terser"),
+				parallel: true,
+			}),
+		],
+	},
 	stats: {
 		all: false, // Fallback for options not defined.
 		errors: true,