cmd/go/internal/cache: save more data from DefaultDir

cmd/go/main.go sets GOCACHE explicitly, so if we don't save some
metadata about how DefaultDir arrived at its answer we will be unable
to reconstruct it later.

Fixes #29243

Change-Id: Ic8bb859ab045a29c91f6a4527e65aedabf874d53
Reviewed-on: https://go-review.googlesource.com/c/154309
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
2 files changed
tree: c69fec6e55fbf5dbf298a641230900d54871d3b9
  1. .gitattributes
  2. .github/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTING.md
  6. CONTRIBUTORS
  7. LICENSE
  8. PATENTS
  9. README.md
  10. api/
  11. doc/
  12. favicon.ico
  13. lib/
  14. misc/
  15. robots.txt
  16. src/
  17. test/
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