defaults: add support for a token file environment variable

[matiasbertani]

Right now, using the Agent Sidecar Injector with an annotation to share the token with a ruby app container, it always writes the token at the path /vault/secrets/token

By default, the client only looks for the token at "#{ENV["HOME"]}/.vault-token"

Solution

add support for a new environment variable VAULT_TOKEN_FILE to look for the token if it is defined

[hashicorp-cla]

All committers have signed the CLA.

[matiasbertani]

HI @dhuckins sorry for ping you, I saw that you made a PR recently and I don't know who this project's active maintainers are. Could you give it a look, or if that is not possible, tell me what I could do instead

[matiasbertani]

ping @AnPucel

[dhuckins]

@matiasbertani seems good to me! do you mind adding a test please?

[matiasbertani]

@dhuckins I'm sorry for the long delay. I've added unit test and also I've refactored the previous code to improve it. Let me know if you need anything else

[matiasbertani]

friendly ping @dhuckins 😄

[matiasbertani]

Is there anything left for me to do to track this? @dhuckins

[matiasbertani]

Ping @dhuckins

[matiasbertani]

@dhuckins Is there anything I can do to move forward with the merge of this PR?

[matiasbertani]

desperate ping @dhuckins

[dhuckins]

hey, sorry @matiasbertani there's been a shakeup here and not watching this repo any more