Add C/C++ header rewriter
This adds a C/C++ header rewriter utility. See the top comment on a quick description of how it works.
No workspace rule is provided yet, that will come later.
Test Plan: This is a build utility, doesn't really matter.
X-Origin-Diff: phab/D705
GitOrigin-RevId: 4bf274d8301f3a38a1ec7512bf310be9815fb647
diff --git a/build/bazel_cc_fix/ccfixspec/ccfixspec.proto b/build/bazel_cc_fix/ccfixspec/ccfixspec.proto
new file mode 100644
index 0000000..d3ef979
--- /dev/null
+++ b/build/bazel_cc_fix/ccfixspec/ccfixspec.proto
@@ -0,0 +1,56 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// 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.
+
+syntax = "proto3";
+
+package ccfixspec;
+
+// CCFixSpec is the root configuration message for bazel_cc_fix
+message CCFixSpec {
+ // replace contains replace directives which modify normal include file resolution. They can be used to for example
+ // redirect system includes to third-party library to the correct inter-workspace path or to change the location
+ // of certain generated files.
+ repeated Replace replace = 1;
+
+ // See GeneratedFile
+ repeated GeneratedFile generated_file = 2;
+
+ // If set, all files in this directory are treated as generated files. Useful for out-of-tree build systems like
+ // meson and cmake. Shouldn't be set on build systems which build in-tree.
+ string build_dir = 3;
+}
+
+message Replace {
+ enum Type {
+ UNKNOWN = 0;
+ // SYSTEM replaces included system headers (within < >) with the given
+ // workspace or inter-workspace (external/<otherworkspace>) paths. It
+ // matches literally as these files are generally not resolvable.
+ SYSTEM = 1;
+ // WORKSPACE replaces included workspace-relative headers (after resolving)
+ // with the given workspace or inter-workspace paths. It matches
+ // pre-resolved workspace-relative paths.
+ WORKSPACE = 2;
+ }
+ Type type = 1;
+ string from = 2;
+ string to = 3;
+}
+
+// GeneratedFile represents a generated file which is not present in the
+// workspace as it has not been generated yet. Specifying it explicitly allows
+// the resolver to know about it an resolve it properly.
+message GeneratedFile { string path = 1; }