tree df6b002e8fd658939fa4d49575727db316f4d8b6
parent c29b3f10e4b5684df2407e45459354f4717fa1f1
author Julie Qiu <julie@golang.org> 1629390338 -0400
committer Julie Qiu <julie@golang.org> 1629400801 +0000

internal/frontend: fix redirects

The go command removes build metadata as part of version
canonicalization. +incompatible is the only metadata that may remain,
but that can't appear in the vcs tag itself.

As a result, a path@version like
https://pkg.go.dev/github.com/go-logr/zapr@v1.0.0+1 will resolve to
https://pkg.go.dev/github.com/go-logr/zapr@v1.0.1-0.20210809170106-a3325063a237.
See https://proxy.golang.org/github.com/go-logr/zapr/@v/v1.0.0+1.info

pkg.go.dev now redirects appropriately.

See https://groups.google.com/g/golang-dev/c/bduZuUdzM_o/m/lBX634unAQAJ
for context.

This fix also redirects other cases where the requested and resolved
versions do not match. For example, github.com/dgrijalva/jwt-go@v3.2.0
will redirect to v3.2.0+incompatible.

For golang/go#47757

Change-Id: I236fbb9e0ed8ef0b1c3928460c2908fcbd9c2033
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/343631
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>