Add npm package installer CLI

2026-05-08 16:26:08 +02:00
parent a0338ab6a7
commit 22d10337c2
7 changed files with 282 additions and 8 deletions
@@ -0,0 +1,198 @@
+#!/usr/bin/env node
+import { mkdir, rm, writeFile } from "node:fs/promises";
+import { homedir } from "node:os";
+import { join } from "node:path";
+import { spawnSync } from "node:child_process";
+
+const serviceDir = join(homedir(), ".config", "systemd", "user");
+const sessiondServiceName = "pi-web-sessiond.service";
+const webServiceName = "pi-web.service";
+
+interface InstallOptions {
+  host: string;
+  port: string;
+}
+
+function run(command: string, args: string[], options: { check?: boolean } = {}): number {
+  const result = spawnSync(command, args, { stdio: "inherit" });
+  const status = result.status ?? 1;
+  if (options.check === true && status !== 0) process.exit(status);
+  return status;
+}
+
+function capture(command: string, args: string[]): { status: number; stdout: string; stderr: string } {
+  const result = spawnSync(command, args, { encoding: "utf8" });
+  return { status: result.status ?? 1, stdout: result.stdout, stderr: result.stderr };
+}
+
+function hasCommand(command: string): boolean {
+  return capture("/usr/bin/env", ["bash", "-lc", `command -v ${command}`]).status === 0;
+}
+
+function parseInstallOptions(args: string[]): InstallOptions {
+  const options: InstallOptions = { host: "127.0.0.1", port: "3000" };
+  for (let i = 0; i < args.length; i += 1) {
+    const arg = args[i];
+    if (arg === undefined) continue;
+    if (arg === "--host") {
+      const value = args[i + 1];
+      if (value === undefined) throw new Error("--host requires a value");
+      options.host = value;
+      i += 1;
+    } else if (arg.startsWith("--host=")) {
+      options.host = arg.slice("--host=".length);
+    } else if (arg === "--port") {
+      const value = args[i + 1];
+      if (value === undefined) throw new Error("--port requires a value");
+      options.port = value;
+      i += 1;
+    } else if (arg.startsWith("--port=")) {
+      options.port = arg.slice("--port=".length);
+    } else if (arg === "--user-systemd") {
+      // Accepted for readability; user systemd is the only installer target for now.
+    } else {
+      throw new Error(`Unknown install option: ${arg}`);
+    }
+  }
+  return options;
+}
+
+function shellSingleQuote(value: string): string {
+  return `'${value.replaceAll("'", "'\\''")}'`;
+}
+
+function systemdEscape(value: string): string {
+  return value.replaceAll("\\", "\\\\").replaceAll('"', '\\"');
+}
+
+function sessiondUnit(): string {
+  return `[Unit]
+Description=Pi Web session daemon
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/env bash -lc ${shellSingleQuote("exec pi-web-sessiond")}
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=default.target
+`;
+}
+
+function webUnit(options: InstallOptions): string {
+  return `[Unit]
+Description=Pi Web server
+After=${sessiondServiceName}
+Wants=${sessiondServiceName}
+
+[Service]
+Type=simple
+Environment="PI_WEB_HOST=${systemdEscape(options.host)}"
+Environment="PI_WEB_PORT=${systemdEscape(options.port)}"
+ExecStart=/usr/bin/env bash -lc ${shellSingleQuote("exec pi-web-server")}
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=default.target
+`;
+}
+
+async function install(args: string[]): Promise<void> {
+  const options = parseInstallOptions(args);
+  if (!hasCommand("systemctl")) throw new Error("systemctl was not found in a bash login shell");
+  if (!hasCommand("pi-web-server")) throw new Error("pi-web-server was not found in a bash login shell. Is pi-web installed globally?");
+  if (!hasCommand("pi-web-sessiond")) throw new Error("pi-web-sessiond was not found in a bash login shell. Is pi-web installed globally?");
+
+  await mkdir(serviceDir, { recursive: true });
+  await writeFile(join(serviceDir, sessiondServiceName), sessiondUnit());
+  await writeFile(join(serviceDir, webServiceName), webUnit(options));
+
+  run("systemctl", ["--user", "daemon-reload"], { check: true });
+  run("systemctl", ["--user", "enable", "--now", sessiondServiceName], { check: true });
+  run("systemctl", ["--user", "enable", "--now", webServiceName], { check: true });
+
+  console.log(`\nPi Web is installed and starting.`);
+  console.log(`Open: http://${options.host === "0.0.0.0" ? "127.0.0.1" : options.host}:${options.port}`);
+  console.log("\nUseful commands:");
+  console.log("  pi-web status");
+  console.log("  pi-web logs");
+  console.log("  pi-web restart");
+}
+
+async function uninstall(): Promise<void> {
+  run("systemctl", ["--user", "disable", "--now", webServiceName]);
+  run("systemctl", ["--user", "disable", "--now", sessiondServiceName]);
+  await rm(join(serviceDir, webServiceName), { force: true });
+  await rm(join(serviceDir, sessiondServiceName), { force: true });
+  run("systemctl", ["--user", "daemon-reload"]);
+  console.log("Pi Web systemd user services removed.");
+}
+
+function serviceAction(action: "start" | "stop" | "restart" | "status"): void {
+  run("systemctl", ["--user", action, sessiondServiceName, webServiceName], { check: action !== "status" });
+}
+
+function logs(): void {
+  run("journalctl", ["--user", "-u", sessiondServiceName, "-u", webServiceName, "-f"]);
+}
+
+function doctor(): void {
+  const checks: [string, string[]][] = [
+    ["systemctl --user", ["systemctl", "--user", "--version"]],
+    ["bash login shell can find node", ["/usr/bin/env", "bash", "-lc", "command -v node"]],
+    ["bash login shell can find npm", ["/usr/bin/env", "bash", "-lc", "command -v npm"]],
+    ["bash login shell can find pi", ["/usr/bin/env", "bash", "-lc", "command -v pi"]],
+    ["bash login shell can find pi-web-server", ["/usr/bin/env", "bash", "-lc", "command -v pi-web-server"]],
+    ["bash login shell can find pi-web-sessiond", ["/usr/bin/env", "bash", "-lc", "command -v pi-web-sessiond"]],
+  ];
+
+  let failed = false;
+  for (const [label, command] of checks) {
+    const [bin, ...args] = command;
+    if (bin === undefined) continue;
+    const result = capture(bin, args);
+    const ok = result.status === 0;
+    failed ||= !ok;
+    console.log(`${ok ? "✓" : "✗"} ${label}`);
+    const output = (result.stdout || result.stderr).trim();
+    if (output !== "") console.log(`  ${output.split("\n")[0] ?? ""}`);
+  }
+
+  if (failed) {
+    console.log("\nIf a command works in your terminal but fails here, make sure your bash login files set PATH the same way.");
+    process.exitCode = 1;
+  }
+}
+
+function help(): void {
+  console.log(`Pi Web
+
+Usage:
+  pi-web install [--host 127.0.0.1] [--port 3000]
+  pi-web uninstall
+  pi-web start|stop|restart|status|logs
+  pi-web doctor
+
+Recommended install:
+  npm install -g pi-web
+  pi-web install
+`);
+}
+
+async function main(): Promise<void> {
+  const [command = "help", ...args] = process.argv.slice(2);
+  if (command === "install") await install(args);
+  else if (command === "uninstall") await uninstall();
+  else if (command === "start" || command === "stop" || command === "restart" || command === "status") serviceAction(command);
+  else if (command === "logs") logs();
+  else if (command === "doctor") doctor();
+  else if (command === "help" || command === "--help" || command === "-h") help();
+  else throw new Error(`Unknown command: ${command}`);
+}
+
+main().catch((error: unknown) => {
+  console.error(error instanceof Error ? error.message : String(error));
+  process.exit(1);
+});