--cidfile support for podman exec

[findesgh]

Feature request description

I've had some situations, where being able to use the --cidfile option with podman exec would've been convenient. As far as I can tell, however, that is not possible, which strikes me as somewhat odd, since, e.g. stop, kill, rm and pause/unpause all support it (I just checked and attach apparently also does not support it).

Suggest potential solution

No response

Have you considered any alternatives?

Workarounds for this exist and are quite straight-forward. One can name a container or use external tools to extract an ID from a cid-file, i.e. this is certainly not a high priority issue.

Additional context

From a UX point of view one might argue that all options to identify a container to a command should be supported by all commands that take a container as argument so one might extend this issue to include attach (and possibly others I've overlooked?).

[vrothberg]

Thanks for reaching out, @findesgh ! This looks like a nice improvement. Are you interested in opening a PR?

[findesgh]

@vrothberg: I know virtually zero Go 😅. A cursory look at the code suggests that this shouldn't be too hard, however, so might be a good opportunity to learn something.
I'll make a stab at it, we'll see how it goes.

[vrothberg]

Awesome, thanks! Feel free to ask questions here :) You can take a look at the how the other commands implement --cidfile. The commit would also need a test but we can collaborate on that.

[github-actions]

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