cmd/gorelease: diagnose load errors with replace or exclude

When package loading fails for a local release module, report when its
go.mod contains replace or exclude directives. Those directives only
apply within the main module and may explain the package errors.

Fixes golang/go#37559

Change-Id: Ic94015caccd2623300e55279a9e2856803cbc5f2
Reviewed-on: https://go-review.googlesource.com/c/exp/+/802580
Auto-Submit: Jonathan Amsterdam <jba@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
6 files changed
tree: 6c8f8da5d440841cbd43fa7cd3323829042081a3
  1. apidiff/
  2. cmd/
  3. constraints/
  4. ebnf/
  5. ebnflint/
  6. errors/
  7. eval/
  8. event/
  9. inotify/
  10. io/
  11. jsonrpc2/
  12. maps/
  13. mmap/
  14. rand/
  15. shiny/
  16. shootout/
  17. slices/
  18. slog/
  19. stats/
  20. sumdb/
  21. trace/
  22. typeparams/
  23. utf8string/
  24. .gitattributes
  25. .gitignore
  26. codereview.cfg
  27. CONTRIBUTING.md
  28. go.mod
  29. go.sum
  30. LICENSE
  31. PATENTS
  32. README.md
README.md

exp

PkgGoDev

This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.