Add temp-directory input

[ncfavier]

Useful when runner.temp does not exist, e.g. in container environments

[yoannchaudet]

Hmm do you know under what conditions runner.temp is unavailable?

On this run, I am running in a container and have the volume available just fine.

[ncfavier]

What makes you conclude that? tar fails because of --hard-dereference before it has a chance to complain about the target directory missing. (which is another issue by the way)

From what I can tell, the containers are created with -v "/home/runner/work/_temp":"/__w/_temp" so the temporary directory is in fact available at /__w/_temp, but this isn't reflected in runner.temp. Maybe it should be? Or maybe we can do something like "if job.container.id is set then use /__w/_temp else use runner.temp" but that's a hack.

[Sleavely]

Since there is no issue tracking it, I'll barge in and drop a comment here because I'm in similar situation where it complains about the /home/runner/work/_temp/artifact.tar file not existing: workflow run

In my case I could easily work around it since the container I use is basically just a pre-installed NodeJS, so switching to the setup-node action solved it for me (commit, workflow run).

[nilsvu]

Opened this issue before I saw the PR: #20