fix: restore runnable darwin compiled binaries

fixes #754

packages/coding-agent/scripts/build-binary.ts

@@ -0,0 +1,61 @@
+#!/usr/bin/env bun
+
+import * as path from "node:path";
+
+const packageDir = path.join(import.meta.dir, "..");
+const outputPath = path.join(packageDir, "dist", "omp");
+
+function shouldAdhocSignDarwinBinary(): boolean {
+	return process.platform === "darwin";
+}
+
+async function runCommand(command: string[], env: NodeJS.ProcessEnv = Bun.env): Promise<void> {
+	const proc = Bun.spawn(command, {
+		cwd: packageDir,
+		env,
+		stdout: "inherit",
+		stderr: "inherit",
+	});
+	const exitCode = await proc.exited;
+	if (exitCode !== 0) {
+		throw new Error(`Command failed with exit code ${exitCode}: ${command.join(" ")}`);
+	}
+}
+
+async function main(): Promise<void> {
+	await runCommand(["bun", "--cwd=../stats", "scripts/generate-client-bundle.ts", "--generate"]);
+	try {
+		await runCommand(["bun", "--cwd=../natives", "run", "embed:native"]);
+		try {
+			const buildEnv = shouldAdhocSignDarwinBinary() ? { ...Bun.env, BUN_NO_CODESIGN_MACHO_BINARY: "1" } : Bun.env;
+			await runCommand(
+				[
+					"bun",
+					"build",
+					"--compile",
+					"--define",
+					"PI_COMPILED=true",
+					"--external",
+					"mupdf",
+					"--root",
+					"../..",
+					"./src/cli.ts",
+					"--outfile",
+					"dist/omp",
+				],
+				buildEnv,
+			);
+
+			// Bun 1.3.12 emits a truncated Mach-O signature on darwin builds.
+			if (shouldAdhocSignDarwinBinary()) {
+				await runCommand(["codesign", "--force", "--sign", "-", outputPath]);
+			}
+		} finally {
+			await runCommand(["bun", "--cwd=../natives", "run", "embed:native", "--reset"]);
+		}
+	} finally {
+		await runCommand(["bun", "--cwd=../stats", "scripts/generate-client-bundle.ts", "--reset"]);
+	}
+}
+
+await main();