Build broken at HEAD for Bazel >= 8.3

[jonathan-dilorenzo]

This seems to be broken in the mainline. See #561 (comment) for more context.

[chrispsommers]

Community: The WG feels it's time to stop supporting Ubuntu 22.04, switching to 24.04. This is an early heads-up that we may phase out 22.04 soon to prevent build breaks starting with Bazel 8. Earlier versions still work with Ubuntu 22.04. Please weigh in if you have an opinion on this.

UPDATE: might be related to Bazel, not Ubuntu version. Stay tuned.

[smolkaj]

Looks like the build started breaking on main 3 months ago, see screenshot.
Here is the link to the first broken build from Jun 24: https://github.com/p4lang/p4runtime/actions/runs/15837959752/job/44645270778

So this looks like a regression in "Bazel latest" (which is Bazel 8.x currently). Indeed, the Bazel version of the last passing run is 8.2.1 vs 8.3.0 for the first failing run. Bingo!

(Note that the build is also broken on ubuntu latest + Bazel latest, so this does not appear to be an Ubuntu 22.04 issue. Updating the title of the issue accordingly.)

A short term workarounds would be to pin to 8.2.1. But we really do want things to Build on "Bazel latest" + "Ubuntu latest".

[smolkaj]

Here is the error (taken from the latest failing run on main):

ERROR: /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/gazelle+/internal/go_repository.bzl:287:13: An error occurred during the fetch of repository 'gazelle++go_deps+com_github_golang_protobuf':
   Traceback (most recent call last):
	File "/home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/gazelle+/internal/go_repository.bzl", line 287, column 13, in _go_repository_impl
		fail("%s: %s" % (ctx.name, result.stderr))
Error in fail: gazelle++go_deps+com_github_golang_protobuf: fetch_repo: go mod download exec error: /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go mod download -json -modcacherw github.com/golang/protobuf@v1.5.3: fork/exec /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go: no such file or directory
ERROR: no such package '@@gazelle++go_deps+com_github_golang_protobuf//proto': gazelle++go_deps+com_github_golang_protobuf: fetch_repo: go mod download exec error: /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go mod download -json -modcacherw github.com/golang/protobuf@v1.5.3: fork/exec /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go: no such file or directory
ERROR: /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go+/proto/BUILD.bazel:24:18: @@rules_go+//proto:go_proto depends on @@gazelle++go_deps+com_github_golang_protobuf//proto:go_default_library in repository @@gazelle++go_deps+com_github_golang_protobuf which failed to fetch. no such package '@@gazelle++go_deps+com_github_golang_protobuf//proto': gazelle++go_deps+com_github_golang_protobuf: fetch_repo: go mod download exec error: /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go mod download -json -modcacherw github.com/golang/protobuf@v1.5.3: fork/exec /home/runner/.cache/bazel/_bazel_runner/1fc64d2e702c0d08ecdb88fe41750bb3/external/rules_go++go_sdk+go_default_sdk/bin/go: no such file or directory

[smolkaj]

Gemini suggests updating io_bazel_rules_go and bazel_gazelle to versions that explicitly support Bazel 8.x ....