Automated rollback of commit 363413110f3a63a11d900864be1852adbaed2899.

*** Reason for rollback ***

Breaks //src/test/shell/bazel:bazel_bootstrap_distfile_test:

INFO: You can skip this first step by providing a path to the bazel binary as second argument:
INFO:    ./compile.sh compile /path/to/bazel
🍃  Building Bazel from scratch......
🍃  Building Bazel with Bazel.
.WARNING: /tmp/bazel_cHivhPBc/out/external/bazel_tools/WORKSPACE:1: Workspace name in /tmp/bazel_cHivhPBc/out/external/bazel_tools/WORKSPACE (@io_bazel) does not match the name given in the repository's definition (@bazel_tools); this will cause a build error in future versions.
ERROR: in target '//external:cc_toolchain': error loading package '@local_config_cc//': Extension file not found. Unable to load file '@local_config_cc//:dummy_toolchain.bzl': file doesn't exist or isn't a file.
INFO: Elapsed time: 3.343s

ERROR: Could not build Bazel

Found by git bisect.

*** Original change description ***

Add a new toolchain type for c++.  In order to do this, PlatformConfiguration is made a legal configuration fragment for every rule class.

Add a default "dummy" c++ toolchain to prevent resolution errors when legacy toolchain selection logic is used.  Add toolchain mocks to java and shell tests.

PiperOrigin-RevId: 166750885

4 files changed, 0 insertions, 68 deletions

diff --git a/tools/cpp/BUILD b/tools/cpp/BUILD
index eb75333e75..1a4dc674ea 100644
--- a/tools/cpp/BUILD
+++ b/tools/cpp/BUILD
@@ -204,18 +204,3 @@ filegroup(
     name = "link_dynamic_library",
     srcs = ["link_dynamic_library.sh"],
 )
-
-toolchain_type(name = "toolchain_type")
-
-# A dummy toolchain is necessary to satisfy toolchain resolution until platforms
-# are used in c++ by default.
-# TODO(b/64754003): Remove once platforms are used in c++ by default.
-toolchain(
-    name = "dummy_cc_toolchain",
-    toolchain = "dummy_cc_toolchain_impl",
-    toolchain_type = ":toolchain_type",
-)
-
-load(":dummy_toolchain.bzl", "dummy_toolchain")
-
-dummy_toolchain(name = "dummy_cc_toolchain_impl")
diff --git a/tools/cpp/BUILD.static b/tools/cpp/BUILD.static
index aaadc5bad8..9ae4950d80 100644
--- a/tools/cpp/BUILD.static
+++ b/tools/cpp/BUILD.static
@@ -115,18 +115,3 @@ filegroup(
     name = "link_dynamic_library",
     srcs = ["link_dynamic_library.sh"],
 )
-
-toolchain_type(name = "toolchain_type")
-
-# A dummy toolchain is necessary to satisfy toolchain resolution until platforms
-# are used in c++ by default.
-# TODO(b/64754003): Remove once platforms are used in c++ by default.
-toolchain(
-    name = "dummy_cc_toolchain",
-    toolchain = "dummy_cc_toolchain_impl",
-    toolchain_type = ":toolchain_type",
-)
-
-load(":dummy_toolchain.bzl", "dummy_toolchain")
-
-dummy_toolchain(name = "dummy_cc_toolchain_impl")
diff --git a/tools/cpp/BUILD.tpl b/tools/cpp/BUILD.tpl
index 170fe3f91d..5ea5368c62 100644
--- a/tools/cpp/BUILD.tpl
+++ b/tools/cpp/BUILD.tpl
@@ -75,18 +75,3 @@ cc_toolchain(
     strip_files = ":empty",
     supports_param_files = 1,
 )
-
-toolchain_type(name = "toolchain_type")
-
-# A dummy toolchain is necessary to satisfy toolchain resolution until platforms
-# are used in c++ by default.
-# TODO(b/64754003): Remove once platforms are used in c++ by default.
-toolchain(
-    name = "dummy_cc_toolchain",
-    toolchain = "dummy_cc_toolchain_impl",
-    toolchain_type = ":toolchain_type",
-)
-
-load(":dummy_toolchain.bzl", "dummy_toolchain")
-
-dummy_toolchain(name = "dummy_cc_toolchain_impl")
diff --git a/tools/cpp/dummy_toolchain.bzl b/tools/cpp/dummy_toolchain.bzl
deleted file mode 100644
index c787f7315d..0000000000
--- a/tools/cpp/dummy_toolchain.bzl
+++ /dev/null
@@ -1,23 +0,0 @@
-# pylint: disable=g-bad-file-header
-# Copyright 2017 The Bazel Authors. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Skylark rule that stubs a toolchain."""
-def _dummy_toolchain_impl(ctx):
-  ctx = ctx  # unused argument
-  toolchain = platform_common.ToolchainInfo()
-  return [toolchain]
-
-dummy_toolchain = rule(_dummy_toolchain_impl, attrs = {})
-