run: make --name a regular argument and allow multiple args for -d/-o

[jorgeorpinel]

The current minimal use of dvc run requires both --name/-n (option) and a command (argument). I believe -n is in fact one of the few or maybe the only required option in all of our commands. How about make it into a proper argument?

$ dvc run [--options] <name> <command>

E.g.

$ dvc run train -d data -d train.py -o model python train.py

We'd may need to keep -n around (as an option to the name arg) for backward compatibility, though.

---

Another idea is to allow -d/--deps and -o/--outs to accept several option args, to avoid repeating the flags. This already applies to -p/--params, via commas.

E.g.

$ dvc run featurize \
       -d data/clean,feats.py \
       -p f.range,f.limit \
       -o data/feats,data/map.csv \
          /feats.py

[efiop]

@jorgeorpinel Great idea! We didn't do that yet because dvc run is too overloaded already and I hope that we will have something like dvc stage add(or something else) in the future, where it would have a more friendly interface. Let's keep this issue open for now.

[jorgeorpinel]

Agree. dvc stage [--options] <name> <cmd> to create/update (maybe even --remove instead of dvc remove) stages, and separately dvc run to run/repro stages and pipelines seems ideal for the 1.0 era IMO (1.2 I guess).

[efiop]

Closing as stale