debugging why we compile protoc without register_toolchains

Author: alexeagle

.bazelrc

@@ -1,2 +1,5 @@
 run --workspace_status_command="bash tools/workspace-status.sh"
 common --incompatible_enable_proto_toolchain_resolution
+# Ensure that we don't accidentally build protobuf
+common --per_file_copt=external/.*protobuf.*@--PROTOBUF_WAS_NOT_SUPPOSED_TO_BE_BUILT
+common --host_per_file_copt=external/.*protobuf.*@--PROTOBUF_WAS_NOT_SUPPOSED_TO_BE_BUILT

.github/workflows/ci.bazelrc

@@ -9,7 +9,7 @@
             },
             {
                "name": "Installing Bazel",
-               "run": "v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH} && ( [ -e .github/workflows/ci.bazelrc ] && cp .github/workflows/ci.bazelrc ~/.bazelrc )"
+               "run": "v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH}"
             },
             {
                "name": "Bazel mod tidy",

.github/workflows/master.yaml

@@ -9,7 +9,7 @@
             },
             {
                "name": "Installing Bazel",
-               "run": "v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH} && ( [ -e .github/workflows/ci.bazelrc ] && cp .github/workflows/ci.bazelrc ~/.bazelrc )"
+               "run": "v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH}"
             },
             {
                "name": "Bazel mod tidy",

.github/workflows/pull-requests.yaml

@@ -32,13 +32,9 @@ single_version_override(
     patches = ["//:patches/jsonnet/bazel-8.diff"],
 )
 
-protoc = use_extension("@toolchains_protoc//protoc:extensions.bzl", "protoc")
-
 # Match protobuf above, until it ships a pre-built binary toolchain itself
+protoc = use_extension("@toolchains_protoc//protoc:extensions.bzl", "protoc")
 protoc.toolchain(version = "v29.3")
-use_repo(protoc, "toolchains_protoc_hub")
-
-register_toolchains("@toolchains_protoc_hub//:all")
 
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
 go_sdk.download(version = "1.24.0")

MODULE.bazel

@@ -66,7 +66,7 @@
         },
         {
           name: 'Installing Bazel',
-          run: 'v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH} && ( [ -e .github/workflows/ci.bazelrc ] && cp .github/workflows/ci.bazelrc ~/.bazelrc )',
+          run: 'v=$(cat .bazelversion) && curl -L https://github.com/bazelbuild/bazel/releases/download/${v}/bazel-${v}-linux-x86_64 > ~/bazel && chmod +x ~/bazel && echo ~ >> ${GITHUB_PATH}',
         },
         {
           name: 'Bazel mod tidy',