stabilize, add daemon state, add base build script

instance/src/lib/nspawn.ts

@@ -1 +1,37 @@
 // wrapper
+
+import { log_from, sleep } from "./utils.ts";
+
+const log = log_from("nspawn");
+
+export function container_command(name: string, directory: string, opts?: {
+	veth?: boolean;
+	boot?: boolean;
+	cmd_opts?: Deno.CommandOptions;
+}) {
+	const args = [
+		`--machine=${name}`,
+		`--directory=${directory}`,
+	];
+	if (opts?.veth ?? false) args.push("--network-veth");
+	if (opts?.boot ?? false) args.push("--boot");
+	const command = new Deno.Command("systemd-nspawn", { ...opts?.cmd_opts, args });
+	return command;
+}
+
+export async function get_container_addresses(name: string) {
+	const command = new Deno.Command("machinectl", { args: ["status", name], stdout: "piped" });
+	while (true) {
+		await sleep(500);
+		log("getting address of", name);
+		const { code, stdout } = await command.output();
+		if (code != 0) continue;
+		const output = new TextDecoder().decode(stdout);
+		const [_, rest] = output.split(" Address: ");
+		if (rest === undefined) continue;
+		const [raw] = rest.split(" OS: ");
+		const addresses = raw.trim().split("\n").map((l) => l.trim());
+		if (addresses.length === 0) continue;
+		return addresses;
+	}
+}