Automate Heroku CLI login - bash

Question

I'm developing a bash script to automatic clone some projects and another task in dev VM's, but we have one project in Heroku and repository is in it. In my .sh file I have:
> heroku login
And this prompt to enter credentials, I read the "help" guide included on binary and documentation but I can't found anything to automatic insert username and password, I want something like this:
> heroku login -u someUser -p mySecurePassword
Exist any way similar to it?

Answer 1

The Heroku CLI only uses your username and password to retrieve your API key, which it stores in your ~/.netrc file ($HOME\_netrc on Windows).
You can manually retrieve your API key and add it to your ~/.netrc file:
Log into the Heroku web interface
Navigate to your Account settings page
Scroll down to the API Key section and click the Reveal button
Copy your API key
Open your ~/.netrc file, or create it, with your favourite text editor
Add the following content:
machine api.heroku.com
login <your-email#address>
password <your-api-key>
machine git.heroku.com
login <your-email#address>
password <your-api-key>
Replace <your-email#address> with the email address registered with Heroku, and <your-api-key> with the API key you copied from Heroku.
This should manually accomplish what heroku login does automatically. However, I don't recommend this. Running heroku login does the same thing more easily and with fewer opportunities to make a mistake.
If you decide to copy ~/.netrc files between machines or accounts you should be aware of two major caveats:
This file is used by many other programs; be careful to only copy the configuration stanzas you want.
Your API key offers full programmatic access to your account. You should protect it as strongly as you protect your password.
Please be very careful if you intend to log into Heroku using any mechanism other than heroku login.

Answer 2

You can generate a non-expiring OAuth token then pass it to the CLI via an environment variable. This is useful if you need to run Heroku CLI commands indefinitely from a scheduler and you don't want the login to expire. Do it like this (these are not actual Tokens and IDs, BTW):
$ heroku authorizations:create
Creating OAuth Authorization... done
Client: <none>
ID: 80fad839-876b-4ea0-a41e-6a9a2fb0cf97
Description: Long-lived user authorization
Scope: global
Token: ddf4a0e5-9294-4c5f-8820-b51c52fce4f9
Updated at: Fri Aug 02 2019 21:26:09 GMT+0100 (British Summer Time) (less than a minute ago)
Get the token (not the ID) from that authorization and pass it to your CLI:
$ HEROKU_API_KEY='ddf4a0e5-9294-4c5f-8820-b51c52fce4f9' heroku run ls --app my-app
Running ls on ⬢ my-app... up, run.2962 (Hobby)
<some file names>
$
By the way this also solves the problem of how to use the Heroku CLI when you have MFA enabled on your Heroku account but your machine doesn't have a web browser e.g., if you are working on an EC2 box via SSH:
$ heroku run ls --app my-app
heroku: Press any key to open up the browser to login or q to exit:
› Error: quit
$ HEROKU_API_KEY='ddf4a0e5-9299-4c5f-8820-b51c52fce4f9' heroku run ls --app my-app
Running ls on ⬢ my-app... up, run.5029 (Hobby)
<some file names>
$
EDIT: For Windows Machines
After you run heroku authorizations:create, copy the "Token", and run the following commands:
set HEROKU_API_KEY=ddf4a0e5-9299-4c5f-8820-b51c52fce4f9
heroku run ls --app my-app

Answer 3

If your goal is just to get the source code, you could use a simple git client. You just need the api key.
Steps to get api key
Log into the Heroku web interface
Navigate to your Account settings page
Scroll down to the API Key section and click the Reveal button
Copy your API key
Download source code using git
Use this url template for git clone
https://my_user:my_password#git.heroku.com/name_of_your_app.git
In my case the user value was my email without domain.
Example :
if mail is **duke#gmail.com**
user for heroku auth will be **duke**
Finally just clone it like any other git repositories:
git clone https://duke:my_password#git.heroku.com/name_of_your_app.git

Answer 4

I agree that Heroku should have by now provided a way to do this with their higher level CLI tool.
You can avoid extreme solutions (and you should, just like Chris mentioned in his answer) by simply using curl and the Heroku API. Heroku allow you to use your API Token (obtainable through your user settings / profile page on the Heroku dashboard).
You can then use the API to achieve whatever it is you wanted to do with their command line tool.
For example, if I wanted to get all config vars for an app I would write a script that did something like the following:
-H "Accept: application/vnd.heroku+json; version=3" \
-H "Authorization: Bearer YOUR_TOKEN```
If *YOUR_APP_NAME* had only one config variable called *my_var* the response of the above call would be
{
"my_var": some_value
}
I've found using this all the time in CI tools that need access to *Heroku* information / resources.