BazelBot hasn't created a change for a C# generator update about repo-automation-bots

[jskeet]

The change also occurred on the preview branch, but that doesn't have a commit on the preview branch of googleapis-gen either.

[SurferJeffAtGoogle]

Bazel bot failed to generate all the csharp targets. Therefore, no changes were committed.

I see this error repeated throughout the bazel bot log:

Step #1: ERROR: /workspace/googleapis/google/cloud/workstations/v1beta/BUILD.bazel:361:21: @//google/cloud/workstations/v1beta:workstations_csharp_gapic_srcjar: `bazel-out/k8-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/protoc --experimental_allow_proto3_optional --plugin=protoc-gen-gapic=bazel-out/k8-opt-exec-2B5CBBC6/bin/external/gapic_generator_csharp/rules_csharp_gapic/run.sh --gapic_out=bazel-out/k8-fastbuild/bin/google/cloud/workstations/v1beta/workstations_csharp_gapic_srcjar.srcjar.zip --gapic_opt=rest-numeric-enums=True,transport=grpc+rest,grpc-service-config=google/cloud/workstations/v1beta/workstations_grpc_service_config.json,common-resources-config=external/gax_dotnet/Google.Api.Gax/ResourceNames/CommonResourcesConfig.json,service-config=google/cloud/workstations/v1beta/workstations_v1beta.yaml -Igoogle/cloud/workstations/v1beta/workstations.proto=google/cloud/workstations/v1beta/workstations.proto -Igoogle/api/annotations.proto=google/api/annotations.proto -Igoogle/api/http.proto=google/api/http.proto -Igoogle/protobuf/descriptor.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/descriptor_proto/google/protobuf/descriptor.proto -Igoogle/api/client.proto=google/api/client.proto -Igoogle/api/launch_stage.proto=google/api/launch_stage.proto -Igoogle/protobuf/duration.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/duration_proto/google/protobuf/duration.proto -Igoogle/api/field_behavior.proto=google/api/field_behavior.proto -Igoogle/api/resource.proto=google/api/resource.proto -Igoogle/longrunning/operations.proto=google/longrunning/operations.proto -Igoogle/rpc/status.proto=google/rpc/status.proto -Igoogle/protobuf/any.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/any_proto/google/protobuf/any.proto -Igoogle/protobuf/empty.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/empty_proto/google/protobuf/empty.proto -Igoogle/protobuf/field_mask.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/field_mask_proto/google/protobuf/field_mask.proto -Igoogle/protobuf/timestamp.proto=bazel-out/k8-fastbuild/bin/external/com_google_protobuf/_virtual_imports/timestamp_proto/google/protobuf/timestamp.proto -Igoogle/cloud/common_resources.proto=google/cloud/common_resources.proto -Igoogle/cloud/location/locations.proto=google/cloud/location/locations.proto -Igoogle/iam/v1/iam_policy.proto=google/iam/v1/iam_policy.proto -Igoogle/iam/v1/options.proto=google/iam/v1/options.proto -Igoogle/iam/v1/policy.proto=google/iam/v1/policy.proto -Igoogle/type/expr.proto=google/type/expr.proto google/cloud/workstations/v1beta/workstations.proto google/cloud/common_resources.proto google/cloud/location/locations.proto google/iam/v1/iam_policy.proto` failed: (Exit 1): protoc failed: error executing command (from target //google/cloud/workstations/v1beta:workstations_csharp_gapic_srcjar) bazel-out/k8-opt-exec-2B5CBBC6/bin/external/com_google_protobuf/protoc --experimental_allow_proto3_optional ... (remaining 28 arguments skipped)
Step #1: 
Step #1: Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
Step #1: System.IO.IOException: Read-only file system : '/root/.local/share/NuGet/Migrations'
Step #1:    at System.IO.FileSystem.CreateDirectory(String fullPath)
Step #1:    at System.IO.Directory.CreateDirectory(String path)
Step #1:    at NuGet.Common.Migrations.MigrationRunner.GetMigrationsDirectory()
Step #1:    at NuGet.Common.Migrations.MigrationRunner.Run()
Step #1:    at Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.Configure()
Step #1:    at Microsoft.DotNet.Cli.Program.ConfigureDotNetForFirstTimeUse(IFirstTimeUseNoticeSentinel firstTimeUseNoticeSentinel, IAspNetCertificateSentinel aspNetCertificateSentinel, IFileSentinel toolPathSentinel, Boolean isDotnetBeingInvokedFromNativeInstaller, DotnetFirstRunConfiguration dotnetFirstRunConfiguration, IEnvironmentProvider environmentProvider, Dictionary`2 performanceMeasurements)
Step #1:    at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, TimeSpan startupTime, ITelemetry telemetryClient)
Step #1:    at Microsoft.DotNet.Cli.Program.Main(String[] args)
Step #1: The user's home directory could not be determined. Set the 'DOTNET_CLI_HOME' environment variable to specify the directory to use.
Step #1: --gapic_out: protoc-gen-gapic: Plugin failed with status code 1.

Assigning this bug back to Jon for advice.

[jskeet]

My guess is that this was caused by updating the .NET SDK from 6.0.402 to 6.0.408 in the Bazel rules (in this commit). This issue may or may not be related.

In order to unblock the pipeline during the UK day, I'll revert just the Bazel part of that commit and do a new release (and update WORKSPACE to refer to it). I'll then reach out to @SurferJeffAtGoogle to find a way to reproduce this myself, so I can work on a fix without having to go via doing a release each time.

[jskeet]

Reverting to 6.0.402 has fixed the build - we now have the changes propagated to googleapis-gen. I'll work on diagnosing why 6.0.408 fails.

[jskeet]

An attempt to reproduce this:

First start bash in a new container with the docker image:

• sudo docker run --rm -it --entrypoint bash gcr.io/repo-automation-bots/bazel-bot:latest

Now do the simple bits of a build, which should exercise the problematic part:

• git clone https://github.com/googleapis/googleapis.git
• cd googleapis
• git checkout 70eaf0dbea370afd5e094e574e3b84153a6ae774 # this is the broken commit
• bazel build google/ads/admob/v1:google-ads-admob-v1-csharp

... but that succeeds :(

Next, try bazelisk instead (in a fresh container), e.g.

• bazelisk build //google/cloud/functions/v1:google-cloud-functions-v1-csharp

... that succeeds as well. So I'm stuck as to how to reproduce this...

[jskeet]

Update: I now have a docker image (from this commit) which fails in Cloud Build, but works in a local Docker build. Curiouser and curiouser.

Will try to reduce it further...

[jskeet]

Fixed in googleapis/gapic-generator-csharp#623