tree ccfc3d9d6e28c96319d08481885cb63490321790
parent 82639d0b205ba741541aef82bff623c8513dccff
author Dmitri Shuralyov <dmitshur@golang.org> 1540935491 -0400
committer Dmitri Shuralyov <dmitshur@golang.org> 1541009909 +0000

maintner: add RPC endpoint for listing Go releases

This change adds an RPC endpoint to maintnerd API server to list
the supported Go releases. This is needed and will be used by
cmd/coordinator to run subrepo trybots on previous Go release
(in addition to current).

It's implemented on top of the Gerrit project ref data that the
maintner corpus already tracks. A release is considered to be
exist for each git tag named "goX", "goX.Y", or "goX.Y.Z".

This functionality is also implemented in some other places using
data that is further away from the source of truth. Such places can
start to use this endpoint instead.

Add a subcommand to maintq to invoke the new list Go releases endpoint.
Its current output (against a local development maintnerd server):

	$ go run .../maintner/maintq -server=localhost:6344 list-releases
	major:1 minor:11 patch:1 tag_name:"go1.11.1" tag_commit:"26957168c4c0cdcc7ca4f0b19d0eb19474d224ac" branch_name:"release-branch.go1.11" branch_commit:"97781d2ed116d2cd9cb870d0b84fc0ec598c9abc"
	major:1 minor:10 patch:4 tag_name:"go1.10.4" tag_commit:"2191fce26a7fd1cd5b4975e7bd44ab44b1d9dd78" branch_name:"release-branch.go1.10" branch_commit:"e97b7d68f107ff60152f5bd5701e0286f221ee93"

Updates golang/go#17626

Change-Id: Ia9ea7f49d421ce0c7a9e85c423aba31572cea52b
Reviewed-on: https://go-review.googlesource.com/c/146137
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>