cmd/gorelease: extract loading functions out of makeReleaseReport

This is a refactoring CL: there should be no visible change in behavior.

There are several feature requests related to loading the base and
release versions from different places or with different module
paths. This CL enables that work by extracting two functions out of
makeReleaseReport.

loadLocalModule loads the release version from a local directory.

loadDownloadedModule downloads the base version and loads it from the
module cache.

In the future, base and release may not necessarily be remote and local.

For golang/go#39666

Change-Id: I37955caacf02479b7a3eaf03782f140a42f3a87e
Reviewed-on: https://go-review.googlesource.com/c/exp/+/238838
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
4 files changed
tree: cfc2f87d30850f5a687308ce537976ff40138453
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. apidiff/
  10. cmd/
  11. codereview.cfg
  12. ebnf/
  13. ebnflint/
  14. errors/
  15. fsnotify/
  16. go.mod
  17. go.sum
  18. inotify/
  19. io/
  20. mmap/
  21. rand/
  22. shiny/
  23. shootout/
  24. sumdb/
  25. utf8string/
  26. winfsnotify/
README.md

exp

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.