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Add an action input/flag to disable logging of public key information (#122)

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This commit adds the new `log-public-key` action input.

Closes #122 (contains the suggested changes plus a few tweaks and documentation), fixes #100.

Co-authored-by: Matthias Pigulla <mp@webfactory.de>
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Camilo Celis Guzman 2022-10-19 10:41:11 +00:00 • committed by Matthias Pigulla
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@ -76,7 +76,16 @@ To support picking the right key in this use case, this action scans _key commen
3. For key comments containing such URLs, a Git config setting is written that uses [`url.<base>.insteadof`](https://git-scm.com/docs/git-config#Documentation/git-config.txt-urlltbasegtinsteadOf). It will redirect `git` requests to URLs starting with either `https://github.com/owner/repo` or `git@github.com:owner/repo` to a fake hostname/URL like `git@...some.hash...:owner/repo`.
4. An SSH configuration section is generated that applies to the fake hostname. It will map the SSH connection back to `github.com`, while at the same time pointing SSH to a file containing the appropriate key's public part. That will make SSH use the right key when connecting to GitHub.com.
## Action Inputs
The following inputs can be used to control the action's behavior:
* `ssh-private-key`: Required. Use this to provide the key(s) to load as GitHub Actions secrets.
* `ssh-auth-sock`: Can be used to control where the SSH agent socket will be placed. Ultimately affects the `$SSH_AUTH_SOCK` environment variable.
* `log-public-key`: Set this to `false` if you want to suppress logging of _public_ key information. To simplify debugging and since it contains public key information only, this is turned on by default.
## Exported variables
The action exports the `SSH_AUTH_SOCK` and `SSH_AGENT_PID` environment variables through the Github Actions core module.
The `$SSH_AUTH_SOCK` is used by several applications like git or rsync to connect to the SSH authentication agent.
The `$SSH_AGENT_PID` contains the process id of the agent. This is used to kill the agent in post job action.