Add SSH agent support for Windows

[svanharmelen]

The Windows support is limited to the Pageant SSH authentication agent. This fixes #3423

[svanharmelen]

@phinze any thoughts about this one?

[phinze]

This LGTM - thanks @svanharmelen!

[svanharmelen]

Thanks!

[FloNeu]

Is this change already released with current version? Trying to see if this fixes my issue ( https://github.com/hashicorp/otto/issues/383 ) too...

[svanharmelen]

@FloNeu yes, this is in Terraform v0.6.9

[phxgithub]

@svanharmelen do I need to use pageant on Windows or should I file a new issue if you know?

Error applying plan:

3 error(s) occurred:

* SSH agent requested but Pageant not running
* SSH agent requested but Pageant not running
* SSH agent requested but Pageant not running

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

[svanharmelen]

@phxgithub yes, as documented here you need to use Pageant on Windows to make this work.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.