cmd/go: doc: update embedded pkgsite version

[seankhliao]

Go version

go version go1.26-devel_f2d96272cb 2025-12-08 10:58:21 -0800 linux/amd64

Output of go env in your module/workspace:

AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='0'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE=''
GOAMD64='v3'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/home/user/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/home/user/.config/go/env'
GOEXE=''
GOEXPERIMENT='simd'
GOFIPS140='off'
GOFLAGS='-tags=goexperiment.simd'
GOGCCFLAGS='-fPIC -m64 -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2445536631=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/home/user/sdk/gotip/src/go.mod'
GOMODCACHE='/home/user/.data/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/home/user/.data/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/home/user/sdk/gotip'
GOSUMDB='sum.golang.org'
GOTELEMETRY='on'
GOTELEMETRYDIR='/home/user/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='path'
GOTOOLDIR='/home/user/sdk/gotip/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26-devel_f2d96272cb 2025-12-08 10:58:21 -0800'
GOWORK=''
PKG_CONFIG='pkg-config'

What did you do?

$ go doc -http

What did you see happen?

go: downloading golang.org/x/pkgsite/cmd/internal/doc@v0.0.0-20250714212547-01b046e81fe7

What did you expect to see?

A more recent version of pkgsite being used.

It seems that cmd/go has a version ref in the source code https://go.googlesource.com/go/+/f2d96272cb1b695dfddcd5b80dfed2ad2ee6db59/src/cmd/go/internal/doc/pkgsite.go#74
So it's missed by the regular update tasks #36905 ?

cc @golang/command-line

[gabyhelp]

Related Issues

• x/pkgsite: cannot refresh documentation locally #54479 (closed)
• x/pkgsite@latest doesn't install #54672 (closed)
• cmd/doc: go doc -http fails with undownloaded modules #73833 (closed)
• x/pkgsite: x/pkgsite@latest doesn't compile, requires Go 1.18 #51185 (closed)
• proposal: x/tools/{godoc,cmd/godoc}: isolate, tag, and delete godoc #59056 (closed)
• x/pkgsite: improve pkgsite command #47780 (closed)
• x/pkgsite: remove github.com/golang/perf (the correct one is golang.org/x/perf) #68703 (closed)
• cmd/doc: fix some user experience issues with pkgsite instance started [freeze exception] #73848 (closed)
• cmd/go: doc -http should start a pkgsite instance and open a browser #68106 (closed)

Related Code Changes

• cmd/doc: add support for starting pkgsite instance for docs

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[seankhliao]

maybe after https://go.dev/cl/729900 so it can render the two new goexperiments in 1.26