Fix install and possibly Jest

packages/scripts/src/install-packages.ts

@@ -0,0 +1,42 @@
+import { exec } from "child_process";
+import { existsSync, readdirSync } from "fs";
+import { join, resolve } from "path";
+import { logger, field } from "../../logger";
+
+/**
+ * Install dependencies for a single package.
+ */
+const doInstall = (pkg: string, path: string): void => {
+	logger.info(`Installing "${pkg}" dependencies...`);
+	exec("yarn", {
+		cwd: path,
+		maxBuffer: 1024 * 1024 * 10,
+	}, (error, stdout, stderr) => {
+		if (error) {
+			logger.error(
+				`Failed to install "${pkg}" dependencies`,
+				field("error", error),
+				field("stdout", stdout),
+				field("stderr", stderr),
+			);
+			process.exit(1);
+		}
+
+		logger.info(`Successfully grabbed \"${pkg}\" dependencies!`);
+	});
+};
+
+/**
+ * Install dependencies for all packages.
+ */
+const handlePackages = (dir: string): void => {
+	readdirSync(dir).forEach((pkg) => {
+		const pkgDir = join(dir, pkg);
+		const pkgJsonPath = join(pkgDir, "package.json");
+		if (existsSync(pkgJsonPath)) {
+			doInstall(pkg, pkgDir);
+		}
+	});
+};
+
+handlePackages(resolve(__dirname, ".."));