Document benefits of this tool over Gazelle

[keithl-stripe]

This project is very interesting, but it seems to have similar goals as Gazelle. Is it different? Better? Worse? Would love if the README could touch on this.

[johnynek]

The 100% honest answer is:

1. we can merge changes to this tool, and I have had problems getting merges to google projects in the past (e.g. bazel and others).
2. the main motivation was supporting scala, which isn't easy to do. You have to have a fair amount of semantic information about the scala code to do a decent build generation. To do that, we used scalameta's parser. Integrating all that with the way gazelle wants extensions seemed like work we didn't want to do.
3. we like rust a lot better than go.

[johnynek]

We really aren't trying to sell this... so if you like gazelle and it's working great for you, enjoy it!

If not, you can investigate this.