Make that `dvc repro --pull` pulls all missing files.

[peper0]

According to help for dvc repro:

  --pull                Try automatically pulling missing cache for outputs
                        restored from the run-cache.

and that's what it does. Pulls missing files that are outputs restored from the run-cache. But if there are outputs missing from "sources" (i.e. dvc files having only output and no command at all), it won't pull them. These must be pulled separately with a pull command.

Why not change it into "pull whatever is missing and necessary for this repro"? Is there any use case where a user want to download automatically some missing files, but not all of them?

[efiop]

Hi @peper0 !

It is the plan 🙂 For now it is limited to run-cache, but we'll add support for data sources soon. Stay tuned! 🙂

[dberenbaum]

Comments from #4871:

Currently the --pull flag have no impact when used together with the --downstream flag. When working in a new repo, one must pull manually all the deps of stage A (if there is too much data handled with dvc to run dvc pull) before running dvc repro --downstream A. It would be great if dvc repro --downstream --pull A would automatically pull A deps.

Linked to #4870 Discord discussion: https://discord.com/channels/485586884165107732/485596304961962003/775412039321387008

Thinking more about it it would be great if --pull would work with -s|--single-item too.