如何用一行命令登录Heroku？能否在Heroku CLI登录命令中直接传入凭据？

Hey there! I’ve been in your shoes before—needing to skip the interactive Heroku login flow for scripts or automation, and scratching my head when the official docs didn’t spell out a direct one-liner. Let’s break down your two questions clearly:

1. One-Line Command to Log Into Heroku #

There are two ways to pull this off, with a clear "preferred" secure method and a less secure workaround:

Recommended: Use an API Token #

This is the safest, most reliable approach (and the one Heroku intends for non-interactive use). If you have 2FA enabled on your account, this is also the only way to bypass the interactive prompt. Here’s the one-liner:

echo "your-heroku-api-key" | heroku login --token

For even better security, store your API key in an environment variable first, then use:

echo "$HEROKU_API_KEY" | heroku login --token

You can generate an API key from your Heroku Account Settings page under the "API Key" section (look for the "Reveal" button).

Insecure Workaround: Pipe Username/Password #

If you absolutely must use your account password (and don’t have 2FA enabled), you can pipe your credentials into the interactive login prompt:

echo -e "your-email@example.com\nyour-password" | heroku login -i

⚠️ Big Security Warning: This will leave your password in your shell’s command history, so only use this in isolated environments (like ephemeral CI/CD runners where command history isn’t saved). Heroku doesn’t document this method because of the obvious security risks.

2. Can You Directly Pass Credentials in the Login Command? #

Short answer: No, Heroku CLI doesn’t have built-in flags (like --username or --password) to pass credentials directly. This is intentional—Heroku wants to discourage exposing plaintext credentials in command lines or scripts.

The only supported way to pass credentials non-interactively is via the --token flag with an API key (the method I outlined first). The pipe workaround is a hack that leverages the interactive prompt, but it’s not officially supported and comes with major security tradeoffs.

内容的提问来源于stack exchange，提问作者Tim D