147 lines
3.5 KiB
TypeScript
Executable file
147 lines
3.5 KiB
TypeScript
Executable file
#!/bin/env -S deno run -A --unstable
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import { daemon_listen, Runner } from "./src/lib.ts";
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import { ContainerConfig } from "./src/lib/config.ts";
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import { NginxController } from "./src/lib/nginx.ts";
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import { socket_path, state_path } from "./src/lib/paths.ts";
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import { log_from, sleep } from "./src/lib/utils.ts";
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const log = log_from("daemon");
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async function main() {
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const state = await State.load();
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const server = await daemon_listen(socket_path());
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log("listening to", socket_path());
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const finish = termination_function(state, server.server);
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Deno.addSignalListener("SIGINT", finish);
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for await (const { cmd, respond } of server) {
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log("received", cmd);
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if (cmd.kind === "status") {
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await respond(JSON.stringify(state.list()));
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continue;
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}
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if (cmd.kind === "enable") {
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(async () => {
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try {
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await state.enable(cmd.name);
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await state.save();
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await respond("enabled");
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} catch (error) {
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log("experienced failure", error);
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await respond(`${error}`);
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}
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})();
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continue;
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}
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if (cmd.kind === "disable") {
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(async () => {
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try {
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await state.disable(cmd.name);
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await state.save();
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await respond("disabled");
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} catch (error) {
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log("experienced failure", error);
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await respond(`${error}`);
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}
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})();
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continue;
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}
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if (cmd.kind === "reload") {
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(async () => {
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try {
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await state.disable(cmd.name);
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await sleep(500);
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await state.enable(cmd.name);
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await respond("reloaded");
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} catch (error) {
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log("experienced failure", error);
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await respond(`${error}`);
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}
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})();
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continue;
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}
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if (cmd.kind === "stop") {
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await state.save();
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await respond("adios");
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await finish();
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}
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await respond("unknown command");
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}
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}
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class State {
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enabled;
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nginx;
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constructor() {
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this.enabled = new Map<string, Runner>();
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this.nginx = new NginxController("barnulf.net", "/etc/nginx/sites-enabled");
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}
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static async load() {
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const result = new State();
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try {
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log("trying to recover state from", state_path());
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const loaded = JSON.parse(await Deno.readTextFile(state_path()));
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for (const name of loaded.enabled ?? []) {
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await result.enable(name);
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}
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log("successfully loaded from", state_path());
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} catch (error) {
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log("experienced failure", error);
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}
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return result;
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}
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async enable(name: string) {
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if (this.enabled.has(name)) throw new Error("Container already enabled");
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log("loading container", name);
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const config = await ContainerConfig.load(name); // TODO
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if (config === null) throw new Error("can't read config");
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log("starting container", name);
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const runner = new Runner(config, this.nginx);
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runner.start();
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this.enabled.set(name, runner);
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log("container", name, "started");
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}
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async disable(name: string) {
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const container = this.enabled.get(name);
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if (container === undefined) throw new Error("Container not found");
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await container.stop();
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this.enabled.delete(name);
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}
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list() {
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return Array.from(this.enabled.keys());
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}
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async save() {
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const content = JSON.stringify({ enabled: this.list() });
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await Deno.writeTextFile(state_path(), content);
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}
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}
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function termination_function(state: State, server: Deno.Listener<Deno.Conn>) {
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return async function finish() {
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log("stopping");
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server.close();
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for (const runner of state.enabled.values()) {
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try {
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await runner.stop();
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} catch (_) { /* on s'en fou */ }
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}
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await Deno.remove(socket_path());
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Deno.exit(0);
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};
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}
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if (import.meta.main) await main();
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