Identity file not used when using `sake ssh`

[zasdaym]

• [x] I have the latest version of sake
• [x] I have searched through the existing issues

Info

• OS
  • [ ] Linux
  • [x] Mac OS X
  • [ ] Windows
  • [ ] other

• Version: 0.15.1

• Authentication:

  • [ ] Identity Key + Passphrase
  • [x] Identity Key
  • [ ] Passphrase
  • [ ] SSH Agent

• Key Type:

  • [x] rsa
  • [ ] ed25519
  • [ ] other

• Key Format:

  • [ ] rfc4716
  • [ ] pkcs8
  • [x] pem

Problem / Steps to reproduce

When using identity_file on sake.yaml, sake ssh won't use the identity file.

Content of sake.yaml:

disable_verify_host: true

servers:
  srv1:
    host: x.x.x.x
    user: root
    identity_file: private.pem

Running sake ssh srv1 will result in failed authentication, while sake run ping -s srv1 is OK.

sake ssh srv1
[email protected]: Permission denied (publickey).

sake run ping -s srv1

TASK [ping: Pong] *************************************************************************************************************************************************************

x.x.x.x | pong

RECAP *************************************************************************************************************************************************************************

 x.x.x.x      ok=1  unreachable=0  ignored=0  failed=0  skipped=0