feat(auth): allow custom token file path via WHOOP_TOKEN_FILE

.env.example

@@ -2,3 +2,5 @@
 WHOOP_CLIENT_ID=
 WHOOP_CLIENT_SECRET=
 WHOOP_REDIRECT_URI=
+# Optional: custom path for OAuth token storage (default: ~/.whoop-cli/tokens.json)
+WHOOP_TOKEN_FILE=

README.md

@@ -36,6 +36,8 @@ Before using, you need to configure WHOOP API credentials:
 export WHOOP_CLIENT_ID=your_client_id
 export WHOOP_CLIENT_SECRET=your_client_secret
 export WHOOP_REDIRECT_URI=https://your-redirect-uri.com/callback
+# Optional: override token storage path for multi-account setups
+export WHOOP_TOKEN_FILE=~/.whoop-cli/tokens-personal.json
 ```
 
 Or create a `.env` file in your working directory.
@@ -45,7 +47,9 @@ Or create a `.env` file in your working directory.
 whoopskill auth login
 ```
 
-Tokens are stored in `~/.whoop-cli/tokens.json` and auto-refresh when expired.
+Tokens are stored in `~/.whoop-cli/tokens.json` by default and auto-refresh when expired.
+
+Set `WHOOP_TOKEN_FILE` to override token location (useful for multiple users/accounts on one machine).
 
 ## Usage
 
@@ -96,7 +100,7 @@ Important:
 - For automation, you must call `whoopskill auth refresh` periodically.
 
 Recommended pattern:
-- Run `whoopskill auth login` once interactively (creates `~/.whoop-cli/tokens.json`).
+- Run `whoopskill auth login` once interactively (creates the default `~/.whoop-cli/tokens.json`, or your `WHOOP_TOKEN_FILE` path if set).
 - Run a small periodic monitor that calls `whoopskill auth refresh` and performs a lightweight fetch.
 
 An example monitor script + systemd timer/cron examples are included here:

src/auth/tokens.ts

@@ -1,23 +1,38 @@
 import { readFileSync, writeFileSync, mkdirSync, existsSync, chmodSync } from 'node:fs';
 import { homedir } from 'node:os';
-import { join } from 'node:path';
+import { dirname, join, resolve } from 'node:path';
 import type { TokenData, OAuthTokenResponse } from '../types/whoop.js';
 import { WhoopError, ExitCode } from '../utils/errors.js';
 
-const CONFIG_DIR = join(homedir(), '.whoop-cli');
-const TOKEN_FILE = join(CONFIG_DIR, 'tokens.json');
+const DEFAULT_TOKEN_FILE = join(homedir(), '.whoop-cli', 'tokens.json');
+
+function getTokenFilePath(): string {
+  const envPath = process.env.WHOOP_TOKEN_FILE?.trim();
+  if (!envPath) {
+    return DEFAULT_TOKEN_FILE;
+  }
+
+  // Resolve relative paths against current working directory
+  return resolve(envPath);
+}
+
+function getConfigDir(): string {
+  return dirname(getTokenFilePath());
+}
 
 // Refresh tokens 15 minutes before expiry to avoid race conditions
 const REFRESH_BUFFER_SECONDS = 900;
 
 function ensureConfigDir(): void {
-  if (!existsSync(CONFIG_DIR)) {
-    mkdirSync(CONFIG_DIR, { recursive: true, mode: 0o700 });
+  const configDir = getConfigDir();
+  if (!existsSync(configDir)) {
+    mkdirSync(configDir, { recursive: true, mode: 0o700 });
   }
 }
 
 export function saveTokens(response: OAuthTokenResponse): void {
   ensureConfigDir();
+  const tokenFile = getTokenFilePath();
 
   const data: TokenData = {
     access_token: response.access_token,
@@ -27,26 +42,28 @@ export function saveTokens(response: OAuthTokenResponse): void {
     scope: response.scope,
   };
 
-  writeFileSync(TOKEN_FILE, JSON.stringify(data, null, 2));
-  chmodSync(TOKEN_FILE, 0o600);
+  writeFileSync(tokenFile, JSON.stringify(data, null, 2));
+  chmodSync(tokenFile, 0o600);
 }
 
 export function loadTokens(): TokenData | null {
-  if (!existsSync(TOKEN_FILE)) {
+  const tokenFile = getTokenFilePath();
+  if (!existsSync(tokenFile)) {
     return null;
   }
 
   try {
-    const content = readFileSync(TOKEN_FILE, 'utf-8');
+    const content = readFileSync(tokenFile, 'utf-8');
     return JSON.parse(content) as TokenData;
   } catch {
     return null;
   }
 }
 
 export function clearTokens(): void {
-  if (existsSync(TOKEN_FILE)) {
-    writeFileSync(TOKEN_FILE, '');
+  const tokenFile = getTokenFilePath();
+  if (existsSync(tokenFile)) {
+    writeFileSync(tokenFile, '');
   }
 }