chore: import upstream snapshot with attribution

tests/unit/cli-data-dir-env.test.ts

@@ -0,0 +1,68 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+import { resolveDataDir as cliResolveDataDir } from "../../bin/cli/data-dir.mjs";
+import { resolveDataDir as runtimeResolveDataDir } from "../../src/lib/dataPaths.ts";
+
+const REPO_ROOT = path.join(path.dirname(fileURLToPath(import.meta.url)), "..", "..");
+const BIN = path.join(REPO_ROOT, "bin", "omniroute.mjs");
+
+async function withTempEnv(
+  fn: (paths: { root: string; home: string; cwd: string }) => void | Promise<void>
+) {
+  const originalEnv = { ...process.env };
+  const originalCwd = process.cwd();
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), "omni-cli-env-"));
+  const home = path.join(root, "home");
+  const cwd = path.join(root, "cwd");
+  fs.mkdirSync(home, { recursive: true });
+  fs.mkdirSync(cwd, { recursive: true });
+
+  delete process.env.DATA_DIR;
+  delete process.env.XDG_CONFIG_HOME;
+  delete process.env.APPDATA;
+  process.env.HOME = home;
+  process.chdir(cwd);
+
+  try {
+    await fn({ root, home, cwd });
+  } finally {
+    process.chdir(originalCwd);
+    for (const key of Object.keys(process.env)) {
+      if (!(key in originalEnv)) delete process.env[key];
+    }
+    for (const [key, value] of Object.entries(originalEnv)) {
+      process.env[key] = value;
+    }
+    fs.rmSync(root, { recursive: true, force: true });
+  }
+}
+
+test("CLI data dir preserves existing legacy ~/.omniroute before XDG", async () => {
+  await withTempEnv(({ home, root }) => {
+    const legacyDir = path.join(home, ".omniroute");
+    fs.mkdirSync(legacyDir, { recursive: true });
+    process.env.XDG_CONFIG_HOME = path.join(root, "xdg");
+
+    assert.equal(cliResolveDataDir(), legacyDir);
+    assert.equal(cliResolveDataDir(), runtimeResolveDataDir());
+  });
+});
+
+test("CLI env loader scans all env paths while preserving first value wins", () => {
+  const source = fs.readFileSync(BIN, "utf8");
+  const loaderStart = source.indexOf("function loadEnvFile()");
+  const loaderEnd = source.indexOf("loadEnvFile();", loaderStart);
+  const loaderSource = source.slice(loaderStart, loaderEnd);
+
+  assert.match(loaderSource, /for \(const envPath of envPaths\)/);
+  assert.match(loaderSource, /if \(process\.env\[key\] === undefined\)/);
+  assert.doesNotMatch(
+    loaderSource,
+    /Loaded env from \$\{envPath\}[\s\S]{0,80}\breturn;/
+  );
+});