go/internal/cgo: set pkgdir with -srcdir instead of CWD

If pkgdir uses a symlink (e.g., how the macOS builders are currently
setup for their GOROOT, due to how /var and /tmp work there), then
changing into that directory to invoke cgo means that cgo will only be
able to see the actual directory it was run from. This can lead to
inconsistencies with code that expects to see the original
symlink-based path.

This CL changes go/internal/cgo to instead use cgo's -srcdir flag so
that cgo can emit //line directives with the symlink paths instead.

Fixes golang/go#44339.

Change-Id: I3cbee6753454922711c8c70d7c64a02565b8bb4c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/293250
gopls-CI: kokoro <noreply+kokoro@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2 files changed
tree: 79162ed119912eaa9ccde12e5046676e99e2878d
  1. benchmark/
  2. blog/
  3. cmd/
  4. container/
  5. copyright/
  6. cover/
  7. go/
  8. godoc/
  9. gopls/
  10. imports/
  11. internal/
  12. playground/
  13. present/
  14. refactor/
  15. txtar/
  16. .gitattributes
  17. .gitignore
  18. .prettierrc
  19. AUTHORS
  20. codereview.cfg
  21. CONTRIBUTING.md
  22. CONTRIBUTORS
  23. go.mod
  24. go.sum
  25. LICENSE
  26. PATENTS
  27. README.md
README.md

Go Tools

PkgGoDev

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.

JS/CSS Formatting

This repository uses prettier to format JS and CSS files.

The version of prettier used is 1.18.2.

It is encouraged that all JS and CSS code be run through this before submitting a change. However, it is not a strict requirement enforced by CI.

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.