go/packages: only list current module's directory in determineRootDirs

When determining the root directory of a module, the go list overlay
code would do a go list -m all to get the module information for all
modules. Stop doing that and only list the current module. This fixes
an issue when users had overlays and were using automatic vendoring
because go list -m all doesn't work with automatic vendoring.

It isn't clear if overlays outside of the main module were ever working
and overlays in the module cache don't make sense. There's a chance that
this might break users with overlays in replaced directories, but it's
not clear that that previously worked, and it wasn't tested. If this
change causes breakages, we can use bcmills' suggestion in
golang.org/issue/37629#issuecomment-594179751 point 3 to fix it.

Fixes golang/go#37629

Change-Id: I826a86bbe54311cac72cbcafb2de4863dc805c2d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/227117
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2 files changed
tree: 7c6e3eb88091ceb5a761aa2bad20e2d08b1e9177
  1. benchmark/
  2. blog/
  3. cmd/
  4. container/
  5. cover/
  6. go/
  7. godoc/
  8. gopls/
  9. imports/
  10. internal/
  11. playground/
  12. present/
  13. refactor/
  14. txtar/
  15. .gitattributes
  16. .gitignore
  17. AUTHORS
  18. codereview.cfg
  19. CONTRIBUTING.md
  20. CONTRIBUTORS
  21. go.mod
  22. go.sum
  23. LICENSE
  24. PATENTS
  25. README.md
README.md

Go Tools

This subrepository holds the source for various packages and tools that support the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.

Others, including the Go guru and the test coverage tool, can be fetched with go get.

Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.

Download/Install

The easiest way to install is to run go get -u golang.org/x/tools/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/tools.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the tools repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/tools/(your subdir):” in the subject line, so it is easy to find.