Migrate to Bazel 8, refresh other dependencies

Update to Bazel 8 and the latest release of rules-python. Also move
from depending on a Git snapshot of protobuf to the latest release of
rules_proto.

We currently use Bazel 8 but explicitly disable module support and
enable workspace support. Moving to Bazel modules is deferred to
future work.

.bazeliskrc

@@ -1 +1 @@
-USE_BAZEL_VERSION=5.4.1
+USE_BAZEL_VERSION=8.0.0

.bazelrc

@@ -1,8 +1,12 @@
-# Use a remote build cache that's world-readable. Don't write unless told otherwise.
+# TODO: migrate to Bazel modules
+common --enable_workspace
+common --enable_bzlmod=false
+
+build --verbose_failures
 
+# Use a remote build cache that's world-readable. Don't write unless told otherwise.
 build --remote_cache=https://storage.googleapis.com/reboot-dev-bazel-remote-cache-reboot-us
 build --remote_upload_local_results=false
 
 # Print full test logs for failed tests.
-
 test --test_output=errors

bazel/deps.bzl

@@ -1,9 +1,9 @@
 """Dependency specific initialization."""
 
-load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
 load("@pyprotoc_plugin_pypi//:requirements.bzl", pypi_deps = "install_deps")
+load("@rules_proto//proto:repositories.bzl", "rules_proto_dependencies")
 
 def deps(repo_mapping = {}):
-    protobuf_deps()
+    rules_proto_dependencies()
 
     pypi_deps(repo_mapping = repo_mapping)

bazel/py_toolchains.bzl

@@ -1,5 +1,6 @@
 """Defines a local python toolchain for use in rules_python."""
 
+load("@rules_proto//proto:toolchains.bzl", "rules_proto_toolchains")
 load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_toolchains")
 
 def py_toolchains(repo_mapping = {}):
@@ -10,3 +11,6 @@ def py_toolchains(repo_mapping = {}):
         python_version = "3.10.12",
         repo_mapping = repo_mapping,
     )
+
+    # TODO: not really a Python toolchain?
+    rules_proto_toolchains()

bazel/pypi_repos.bzl

@@ -3,12 +3,11 @@ should be installed later in WORKSPACE file to be accessible.
 `pip_parse` takes a `requirements_lock` file as input, which is
 generated by the `bazel run :requirements.update` command."""
 
-load("@python3_10_12//:defs.bzl", "interpreter")
 load("@rules_python//python:pip.bzl", "pip_parse")
 
 def pypi_repos():
     pip_parse(
         name = "pyprotoc_plugin_pypi",
-        python_interpreter_target = interpreter,
+        python_interpreter_target = "@python3_10_12_host//:python",
         requirements_lock = "@com_github_reboot_dev_pyprotoc_plugin//:requirements_lock.txt",
     )

bazel/repos.bzl

@@ -16,30 +16,26 @@ def repos(external = True, repo_mapping = {}):
     """Adds repositories/archives needed by pyprotoc-plugin
 
     Args:
-          external: whether or not we're invoking this function as though
-            though we're an external dependency
+          external: whether we are invoking this function as though we are
+            an external dependency
           repo_mapping: passed through to all other functions that expect/use
             repo_mapping, e.g., 'git_repository'
     """
     http_archive(
         name = "rules_python",
-        sha256 = "9acc0944c94adb23fba1c9988b48768b1bacc6583b52a2586895c5b7491e2e31",
-        strip_prefix = "rules_python-0.27.0",
-        url = "https://github.com/bazelbuild/rules_python/releases/download/0.27.0/rules_python-0.27.0.tar.gz",
+        sha256 = "4f7e2aa1eb9aa722d96498f5ef514f426c1f55161c3c9ae628c857a7128ceb07",
+        strip_prefix = "rules_python-1.0.0",
+        url = "https://github.com/bazelbuild/rules_python/releases/download/1.0.0/rules_python-1.0.0.tar.gz",
         repo_mapping = repo_mapping,
     )
 
-    if "com_google_protobuf" not in native.existing_rules():
-        git_repository(
-            name = "com_google_protobuf",
-            remote = "https://github.com/protocolbuffers/protobuf",
-            # Release v3.19.4.
-            # TODO(codingcanuck): Update to a newer release after
-            # https://github.com/protocolbuffers/protobuf/issues/9688 is fixed.
-            commit = "22d0e265de7d2b3d2e9a00d071313502e7d4cccf",
-            shallow_since = "1643340956 -0800",
-            repo_mapping = repo_mapping,
-        )
+    http_archive(
+        name = "rules_proto",
+        sha256 = "14a225870ab4e91869652cfd69ef2028277fc1dc4910d65d353b62d6e0ae21f4",
+        strip_prefix = "rules_proto-7.1.0",
+        url = "https://github.com/bazelbuild/rules_proto/releases/download/7.1.0/rules_proto-7.1.0.tar.gz",
+        repo_mapping = repo_mapping,
+    )
 
     if external and "com_github_reboot_dev_pyprotoc_plugin" not in native.existing_rules():
         git_repository(

rules.bzl

@@ -107,7 +107,7 @@ def _protoc_plugin_rule_implementation(context):
         else:
             fail(
                 "Handling this type of (generated?) .proto file " +
-                "was not forseen and is not implemented. " +
+                "was not foreseen and is not implemented. " +
                 "Please create an issue at " +
                 "https://github.com/reboot-dev/pyprotoc-plugin/issues " +
                 "with your proto file and we will have a look!",

tests/cpp/BUILD.bazel

@@ -1,6 +1,7 @@
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_proto_library")
-load("@rules_proto//proto:defs.bzl", "proto_library")
 load("@rules_python//python:defs.bzl", "py_binary")
+load("@rules_proto//proto:defs.bzl", "proto_library")
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+load("@com_google_protobuf//bazel:cc_proto_library.bzl", "cc_proto_library")
 load(":cpp_rule.bzl", "cc_generate_library")
 
 py_binary(