tree f68ace798286d83ef87ac8befc00fa0aad5d3293
parent 2bc8ed8e9c5d8ae303b42bbd8c65f2c5dc38352a
author Russ Cox <rsc@golang.org> 1635389995 -0400
committer Russ Cox <rsc@golang.org> 1635444659 +0000

cmd/go: update for //go:build lines

cmd/go has its own //go:build evaluator, which is needed for
patterns like 'all'. The code is a modified copy of some unexported
routines from the go/build package. Update it by copying those
again and re-modifying them. The modifications are primarily the new
func eval and also ignoring errors.

This CL will need to be backported to Go 1.17, or else Go 1.17
will break when faced with certain //go:build-only repos during
'go list all' or 'go mod tidy'.

For #41184.
Fixes #49198.

Change-Id: Ie0fe3caa8d49004935ecd76d7977f767fe50e317
Reviewed-on: https://go-review.googlesource.com/c/go/+/359355
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>