add repo-wide typechecking

scripts/typecheck.ts

@@ -0,0 +1,56 @@
+#!/usr/bin/env bun
+
+import { readdirSync, statSync } from "node:fs";
+import { join, relative } from "node:path";
+
+const workspaceRoots = ["apps", "services", "packages"];
+
+const findTsconfigs = (dir: string): string[] => {
+  const entries = readdirSync(dir, { withFileTypes: true });
+  const tsconfigs: string[] = [];
+
+  for (const entry of entries) {
+    if (!entry.isDirectory()) {
+      continue;
+    }
+
+    const workspacePath = join(dir, entry.name);
+    const tsconfigPath = join(workspacePath, "tsconfig.json");
+
+    if (statSync(tsconfigPath, { throwIfNoEntry: false })?.isFile()) {
+      tsconfigs.push(tsconfigPath);
+    }
+  }
+
+  return tsconfigs;
+};
+
+const tsconfigs = workspaceRoots.flatMap((root) => findTsconfigs(root)).sort();
+
+if (tsconfigs.length === 0) {
+  console.log("No workspace tsconfig.json files found.");
+  process.exit(0);
+}
+
+let failed = false;
+
+for (const tsconfig of tsconfigs) {
+  const label = relative(process.cwd(), tsconfig);
+  console.log(`\nTypechecking ${label}`);
+
+  const result = Bun.spawnSync(["bunx", "tsc", "-p", tsconfig, "--noEmit", "--incremental", "false", "--pretty", "false"], {
+    stdout: "inherit",
+    stderr: "inherit"
+  });
+
+  if (result.exitCode !== 0) {
+    failed = true;
+  }
+}
+
+if (failed) {
+  console.error("\nTypecheck failed.");
+  process.exit(1);
+}
+
+console.log("\nTypecheck passed.");