Refactor installation process and enhance configuration management; add locale detection and autostart support

test/locale.test.ts

@@ -0,0 +1,67 @@
+import { test } from "node:test";
+import assert from "node:assert";
+import { mkdtempSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { detectKeyboardLayout, detectLang } from "../src/locale.js";
+
+function withFakeLocalectl(output: string, fn: () => void) {
+  const dir = mkdtempSync(join(tmpdir(), "fake-localectl-"));
+  writeFileSync(join(dir, "localectl"), `#!/bin/sh\ncat <<'EOF'\n${output}\nEOF\n`, { mode: 0o755 });
+  const originalPath = process.env.PATH;
+  process.env.PATH = `${dir}:${originalPath}`;
+  try {
+    fn();
+  } finally {
+    process.env.PATH = originalPath;
+  }
+}
+
+test("detectKeyboardLayout reads the X11 Layout line", () => {
+  withFakeLocalectl(
+    `   System Locale: LANG=de_DE.UTF-8
+       VC Keymap: de-latin1
+      X11 Layout: de
+       X11 Model: pc105`,
+    () => {
+      assert.strictEqual(detectKeyboardLayout(), "de");
+    },
+  );
+});
+
+test("detectKeyboardLayout falls back to 'us' when localectl has no X11 Layout line", () => {
+  withFakeLocalectl(`   System Locale: LANG=en_US.UTF-8\n       VC Keymap: us`, () => {
+    assert.strictEqual(detectKeyboardLayout(), "us");
+  });
+});
+
+test("detectKeyboardLayout falls back to 'us' when localectl is missing entirely", () => {
+  const originalPath = process.env.PATH;
+  process.env.PATH = "/nonexistent";
+  try {
+    assert.strictEqual(detectKeyboardLayout(), "us");
+  } finally {
+    process.env.PATH = originalPath;
+  }
+});
+
+test("detectLang reads $LANG", () => {
+  const original = process.env.LANG;
+  process.env.LANG = "de_DE.UTF-8";
+  try {
+    assert.strictEqual(detectLang(), "de_DE.UTF-8");
+  } finally {
+    if (original === undefined) delete process.env.LANG;
+    else process.env.LANG = original;
+  }
+});
+
+test("detectLang returns null when $LANG is unset", () => {
+  const original = process.env.LANG;
+  delete process.env.LANG;
+  try {
+    assert.strictEqual(detectLang(), null);
+  } finally {
+    if (original !== undefined) process.env.LANG = original;
+  }
+});