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README.vendor: document release cycle considerations

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Write down a few more things relevant to the process of maintaining
the vendor directory for the std and cmd modules. This includes the
import path of the package containing a tree consistency check, and
some considerations regarding the Go release cycle.

Also mention the updatestd command with enough context so that it's
clear that it is okay to either use it to update everything at once,
or instead update specific modules with individual 'go get' calls,
whichever is a better fit for the task at hand.

For #31806.
For #36905.

Change-Id: I37d391c557d6cf6ebf2751d71ab9c8f7c10d922d
Reviewed-on: https://go-review.googlesource.com/c/go/+/739301
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Alexander <jitsu@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
This commit is contained in:
Dmitri Shuralyov
2026-01-26 12:47:22 -05:00
committed by Gopher Robot
parent cffd7a3ec4
commit d381731e06
1 changed files with 21 additions and 0 deletions
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@@ -39,12 +39,14 @@ Go from source and use that 'go' binary to update its source tree.
Requirements may be added, updated, and removed with 'go get'.
The vendor directory may be updated with 'go mod vendor'.
Tree inconsistencies are reported by 'go test cmd/internal/moddeps'.
A typical sequence might be:
cd src # or src/cmd
go get golang.org/x/net@master
go mod tidy
go mod vendor
go test cmd/internal/moddeps
Use caution when passing '-u' to 'go get'. The '-u' flag updates
modules providing all transitively imported packages, not only
@@ -53,3 +55,22 @@ the module providing the target package.
Note that 'go mod vendor' only copies packages that are transitively
imported by packages in the current module. If a new package is needed,
it should be imported before running 'go mod vendor'.
Go release cycle considerations
===============================
Applying changes to packages that are vendored follows the considerations
written down at go.dev/s/release.
When the Go tree is open for development, a specific change may be pulled in
at any time that it is needed. During the release freeze, the bar for changes
in vendored packages is the same as it is for changes in non-vendored packages.
After a major release is out, minor Go releases follow a more involved process
documented at go.dev/wiki/MinorReleases#cherry-pick-cls-for-vendored-golangorgx-packages.
In addition to individual updates that happen on demand, all dependencies in
the std and cmd modules are updated to their latest available versions at least
twice during every major release cycle. This is done to avoid the possibility of
some dependencies being left on very old versions and in turn make their eventual
update more disruptive. This recurring process is tracked in go.dev/issue/36905.
The golang.org/x/build/cmd/updatestd command exists to assist with that process.