replace `dvc run`

[dberenbaum]

Add dvc stage add --run option that mimics dvc run (adds a stage and reproduces it). See #5819.

• Decide how to update docs due to this. Probably phase out all run examples and redirect its ref to stage add.

[skshetry]

There's a small difference between current behaviour of dvc stage add and dvc run --no-exec, that the former tries not to check too many things and not fail as much as possible as a result of that. dvc run validates of a lot of things and runs the script. If the script fails or the validation fails, it won't dump that stage to dvc.yaml.

What should the behaviour of dvc stage add --run be in that case? Should it also not dump those stages (similar to dvc run)? Or, should it dump anyway even if it fails (i.e. how stage add works)?

[dberenbaum]

Good question! IMO let's keep it consistent with dvc stage add and keep it in dvc.yaml if it would have succeeded without --run. Thoughts @jorgeorpinel @shcheklein ?

[shcheklein]

Agreed. It sound simpler and users would add force if they need to fix and run it again.

[jorgeorpinel]

let's keep it consistent with dvc stage add and keep it in dvc.yaml if it would have succeeded without --run

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[jorgeorpinel]

Q. Will run get deprecated eventually or turned into an alias of stage add --run? The latter sounds nicer but the former may be less problematic (support-wise).