Specify alternative location for identity file

It would be good if you could specify an alternative location for the identity file when the ssh key gets generated.

The reason being: I’m trying to debug ssh problems within my pipeline and when the ssh key is generated by the action it conflicts with the rest of my pipeline.

For example:

- name: Setup tmate session
  uses: mxschmitt/action-tmate@v2
  with:
    name: id_rsa_tmate

[dscho]

You all! This is a fantastic idea. And all you need to do is to implement it.

1. The action.yml file needs to learn about a new input, say, id_rsa_filename (a good default seems to be "" for “leave the default alone”).

2. Close to the location where the sudo input is interpreted, that new id_rsa_filename input needs to be read, say, via const idRSA = core.getInput("id_rsa_filename").

3. That value needs to be used (if it is non-empty) instead of id_rsa in https://github.com/mxschmitt/action-tmate/blob/dfb94ec78701b33c98463d487c94fb5241e96942/src/index.js#L30. It would appear that something like this should work:

    await execShellCommand(`echo -e 'y\n'|ssh-keygen -q -t rsa -N "" -f ~/.ssh/${idRSA || "id_rsa"}`);
   

4. Test, test, test. The absence of id_rsa_filename should fall back to using id_rsa. And a non-empty id_rsa_filename should use it. And an invalid file name should error out.

5. Mention this in the README.md.

6. Open a Pull Request.

[mxschmitt]

Yeah! closed because of to little demand…