chore: Parallelize build (#5182

* Parallelize build

* Update package.json

build.js

@@ -0,0 +1,77 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+/* eslint-disable no-undef */
+const { exec } = require("child_process");
+const { readdirSync } = require("fs");
+
+const getDirectories = (source) =>
+  readdirSync(source, { withFileTypes: true })
+    .filter((dirent) => dirent.isDirectory())
+    .map((dirent) => dirent.name);
+
+/**
+ * Executes a shell command and return it as a Promise.
+ * @param cmd {string}
+ * @return {Promise<string>}
+ */
+function execAsync(cmd) {
+  return new Promise((resolve) => {
+    exec(cmd, (error, stdout, stderr) => {
+      if (error) {
+        console.warn(error);
+      }
+      resolve(stdout ? stdout : stderr);
+    });
+  });
+}
+
+async function build() {
+  // Clean previous build
+  console.log("Clean previous build…");
+
+  await Promise.all([
+    execAsync("rm -rf ./build/server"),
+    execAsync("rm -rf ./build/plugins"),
+  ]);
+
+  const d = getDirectories("./plugins");
+
+  // Compile server and shared
+  console.log("Compiling…");
+  await Promise.all([
+    execAsync(
+      "yarn babel --extensions .ts,.tsx --quiet -d ./build/server ./server"
+    ),
+    execAsync(
+      "yarn babel --extensions .ts,.tsx --quiet -d ./build/shared ./shared"
+    ),
+    ...d.map(async (plugin) =>
+      execAsync(
+        `yarn babel --extensions .ts,.tsx --quiet -d "./build/plugins/${plugin}/server" "./plugins/${plugin}/server"`
+      )
+    ),
+  ]);
+
+  // Copy static files
+  console.log("Copying static files…");
+  await Promise.all([
+    execAsync(
+      "cp ./server/collaboration/Procfile ./build/server/collaboration/Procfile"
+    ),
+    execAsync(
+      "cp ./server/static/error.dev.html ./build/server/error.dev.html"
+    ),
+    execAsync(
+      "cp ./server/static/error.prod.html ./build/server/error.prod.html"
+    ),
+    execAsync("cp package.json ./build"),
+    ...d.map(async (plugin) =>
+      execAsync(
+        `cp ./plugins/${plugin}/plugin.json ./build/plugins/${plugin}/plugin.json`
+      )
+    ),
+  ]);
+
+  console.log("Done!");
+}
+
+build();