cmd/godoc: don't execute go list -m all when GOMOD is /dev/null

When the GOMOD value is the operating system's null device, there
isn't a main module. Return an empty build list right away, since
running 'go list -m all' in Go 1.14 will cause a "cannot match "all":
working directory is not part of a module" error.

Fixes golang/go#35690
Updates golang/go#35728

Change-Id: I024ca3b7d774835140ce4a1625133aff6554a533
Reviewed-on: https://go-review.googlesource.com/c/tools/+/208258
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2 files changed
tree: f4c13c53f7c370063f9090b0db0cfa58b92dbcd2
  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.