tree 29d463262decdd49ba11269bf0a6bfba070924ac
parent 2a67299b37c4d5fe4317b70c527780c913d1c612
author Julie Qiu <julie@golang.org> 1607796627 -0500
committer Julie Qiu <julie@golang.org> 1607973060 +0000

internal/postgres: prefer longest module path

The go command determines the latest minor version by picking the
longest module path that exists, then the latest version of that.

For example, given two "latest" possibilities for
cloud.google.com/go/pubsublite:

- cloud.google.com/go@v0.69.0/pubsublite
- cloud.google.com/go/pubsublite@v0.4.0

"go get cloud.google.com/go/pubsublite" will choose
cloud.google.com/go/pubsublite@v0.4.0.

Previously, pkg.go.dev/cloud.google.com/pubsublite would show
cloud.google.com/go@v0.69.0/pubsublite. This change updates the site to
display cloud.google.com/go/pubsublite@v0.4.0.

Note that given these two "latest" possibilities:

- cloud.google.com/go@v0.74.0/compute/metadata
- cloud.google.com/go/compute/metadata@v0.0.0-20181115181204-d50f0e9b2506

"go get cloud.google.com/go/compute/metadata" will return
cloud.google.com/go@v0.74.0/compute/metadata.

The reason is because "go get cloud.google.com/go/compute/metadata" will
look for tagged versions of the module
cloud.google.com/go/compute/metadata. Not finding any, it will look for
the pseudo-version for the current tip of the default branch. Since
today, there's no go.mod there, it proceeds as if this subdirectory was
never a nested module. It will then try "cloud.google.com/go/compute"
and so on until it eventually finds that
cloud.google.com/go@v0.74.0/compute/metadata has this package.

Pkg.go.dev/cloud.google.com/go/compute/metadata already shows
cloud.google.com/go@v0.74.0/compute/metadata. A test is added to verify
this logic.

Fixes golang/go#43166

Change-Id: I748fd2693ad7be761e49df9da285902c6dd9101d
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/277512
Run-TryBot: Julie Qiu <julie@golang.org>
Trust: Julie Qiu <julie@golang.org>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>