Release 3.1 - April 2020

[laurentlb]

Status of Bazel 3.1

• Target baseline: 2020-04-07
• Expected release date: April 20-24
• List of release blockers

To report a release-blocking bug, please file a bug using the Release blocker label, and cc me.

Task list:

• Update GitHub issues for incompatible changes
• Pick release baseline: 17ebbf1
• Create release candidate: https://releases.bazel.build/3.1.0/rc1/index.html
• Check downstream projects: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/1451
• Create draft release announcement
• Send for review the release announcement PR:
• Push the release, notify package maintainers:
• Update the documentation
• Push the blog post
• Update the release page

[laurentlb]

Created the candidate with:
scripts/release/release.sh create 3.1.0 17ebbf1

You can download it from: https://releases.bazel.build/3.1.0/rc1/index.html

[laurentlb]

I'll cherrypick aeee3e0 to fix #10029.

[laurentlb]

I'll also cherrypick 2f14b57 to fix #11040.

I'm now waiting for a resolution of #11114.

[laurentlb]

Cherrypicking 344d64f to fix #11114

[laurentlb]

Created a new candidate using:
scripts/release/release.sh create --force_rc=2 3.1.0 17ebbf1 aeee3e0 2f14b57 344d64f

You can download it from:
 https://releases.bazel.build/3.1.0/rc2/index.html

Unless an issue is reported, I expect Bazel 3.1 to be released next Monday.

[werkt]

#11140 Fixes a regression (and adds testing) with orphaned action result output directories, introduced with #10029. This should be a release blocker.

[laurentlb]

New candidate created:
scripts/release/release.sh create --force_rc=4 3.1.0 17ebbf1 aeee3e0 2f14b57 344d64f d508458 24f97e1

You can download it from https://releases.bazel.build/3.1.0/rc4/index.html

[laurentlb]

Bazel 3.1 has been released and is available here: https://github.com/bazelbuild/bazel/releases/tag/3.1.0

[laurentlb]

cc @petemounce @excitoon @vbatts

[vbatts]

fedora/centos build kicked off: https://copr.fedorainfracloud.org/coprs/vbatts/bazel/build/1344869/

[vbatts]

again, all succeed except for epel-7-aarch64

[jin]

The bazelbuild homebrew tap is still on 3.0.0 https://github.com/bazelbuild/homebrew-tap/blob/master/Formula/bazel.rb

Also please see #11243 -- there are two homebrew formulas, with the community maintained one at 3.1.0 already. Should we consider de-duplicating the formulas?