cmd/dist: use go/build/constraint to parse build constraints

Back when this simple implementation was added (in CL 359314), the
required bootstrap was a very old version of Go. By now, Go 1.27
requires bootstrap of Go 1.24.6 or later, so it can rely on the
go/build/constraint package being available.

This fixes a bug affecting the precedence of || and && that the
previous implementation had, otherwise the only change is error text.

For #41184.
Fixes #79185.

Change-Id: I8b520629a702e9d6ddf7672ef3893f237569e93e
Reviewed-on: https://go-review.googlesource.com/c/go/+/773822
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2 files changed
tree: 334b57b5a90995e458db3b44c48388cd4a068e3f
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
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