I wanted to open an umbrella issue discussing the changes that we might need to do to adapt godoc now that we will start to have modules.

• For starters, now that we have $GOPATH/src/mod folder containing versioned snapshots of various libraries, all of them show up in the /pkg/ html output.

What is the recommendation to handle this case ? To simply dump all versions of all packages does not seem like the right thing to do. It also gives a sense of exposing internal details of storing "@vX.Y.Z" along with folder names.

(This is taken care of by moving from src/mod to pkg/mod)

• Also, for new systems that are completely working outside of GOPATH, how do we decide what to show in the output of /pkg/ page ? In the current workflow, it won't show anything because $GOPATH/src is empty. Everything is inside $GOPATH/pkg/mod.

Can we improve this ? Should we add an option to show godoc for a specific module root ? Or some notion to show documentation of only a given package.

I have not been following the progress on modules. So please let me know if there are some obvious fixes to these.

@rsc @bradfitz