83 lines
2.7 KiB
TypeScript
83 lines
2.7 KiB
TypeScript
import { Command } from "commander";
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import path from "path";
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import type { BunSpawnOptions } from "../../types";
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import writeErrorFile from "../../functions/write-error-file";
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import grabDirNames from "../../utils/grab-dir-names";
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import { existsSync, rmSync } from "fs";
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const { BUNX_BUNDLER_ERROR_EXIT_FILE } = grabDirNames();
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const MAX_RETRIES = 5;
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const RETRY_RESET_AFTER_MS = 10000;
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export default function () {
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return new Command("start")
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.description("Start production server")
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.action(async () => {
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// A stale error file from a previous session makes the bundler
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// run in "silent" mode and pages fail with misleading messages.
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rmSync(BUNX_BUNDLER_ERROR_EXIT_FILE, { force: true });
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await start();
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});
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}
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async function start() {
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// A loop, not recursion: each restart would otherwise keep the previous
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// call (and its subprocess) alive for the supervisor's whole lifetime.
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let retries = 0;
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while (true) {
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if (retries >= MAX_RETRIES) {
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console.error(
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`Production server crashed ${MAX_RETRIES} times. Exiting.`,
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);
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process.exit(1);
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}
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const prod_spawn_file = path.resolve(__dirname, "prod-spawn.ts");
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const prod_spawn_js_file = path.resolve(__dirname, "prod-spawn.js");
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const final_spawn_file = existsSync(prod_spawn_js_file)
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? prod_spawn_js_file
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: prod_spawn_file;
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const spawn_options: BunSpawnOptions = {
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cmd: ["bun", final_spawn_file],
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stdio: ["inherit", "inherit", "inherit"],
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onExit(subprocess, exitCode, signalCode, error) {
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writeErrorFile({ exitCode, error });
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},
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env: {
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...process.env,
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NODE_ENV: "production",
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},
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};
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const started_at = Date.now();
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let child_process;
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try {
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child_process = Bun.spawn(spawn_options);
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} catch (error) {
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console.error(`Failed to start production process:`, error);
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retries++;
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continue;
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}
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const exited = await child_process.exited;
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// A null exit means the child was killed by a signal (e.g. Ctrl+C
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// in the shared terminal), which we must not restart.
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if (exited == null) {
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return;
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}
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// Restart on any numeric exit (0 included: the server should never
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// exit cleanly). Only consecutive quick crashes count toward the
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// limit; a child that ran for a while starts the count over.
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retries =
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Date.now() - started_at >= RETRY_RESET_AFTER_MS ? 1 : retries + 1;
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}
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}
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