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Augle

Auth + Google = Augle

Usage

This library is specifcally for service accounts for Google Cloud. It accepts a few different forms of fetching the access tokens for a service account:

  • default: This will work through the order defined in Google Application Default Credentials.
  • {file, Path}: Acts the same as if you have the os variable GOOGLE_APPLICATION_CREDENTIALS defined to the Path.
  • {file, Path, Scopes}: Acts the same as above but supports the inclusion of scopes you need credentials for.
  • {metadata, ServiceAccount}: If all else fails under default it will try this method with <<"default">> a the ServiceAccount. You can instead use it directly and use different service accounts. It must be running on a Google cloud instance (including through AppEngine or Container Engine) or when developing with the GCE Metadata Emulator.

There is a cache that is checked first, keyed on how the credentials were fetched, that sets a timer that sends a message to the cache process to refresh the credentials 10 seconds before they expire. Not expected to work well if you are storing a shit load of service account credentials in the same cache...

Simply add to your rebar.config deps list:

{deps, [augle]}.