Support copying slugs

[aidanlister]

There doesn't seem to be any way to access the slug ID:
https://devcenter.heroku.com/articles/platform-api-copying-slugs

[aidanlister]

This Heroku API wrapper seems to get in the way a little. Here's a small snippet which uses Requests directly:

import requests
import json
import pprint

def doheroku(endpoint, app, command, extra_headers={}, method='get', data=None):
    base_url = 'https://api.heroku.com/'
    headers = {'Accept': 'application/vnd.heroku+json; version=3'}
    url = '%s/%s/%s/%s' % (base_url, endpoint, app, command)
    headers.update(extra_headers)
    r = getattr(requests, method)(url, headers=headers, data=data)
    return r.json()

# Fetch the most recent slug from the "app-example" app
response = doheroku('apps', 'app-example', 'releases', {'Range': 'id ..; order=asc, max=1;'})
slug_id = response[0]['slug']['id']

# Promote the head slug to "app-my-new-example"
response = doheroku('apps', 'app-my-new-example', 'releases', method='post', data={ 'slug': slug_id })
pprint.pprint(response)

This relies on your ~/.netrc usually created by heroku login.

[edmorley]

This project has been deprecated for some time, and is now being sunset.

We recommend that you use the maintained https://github.com/martyzz1/heroku3.py instead.