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// Copyright 2011 Google Inc. 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include <string>
#include <set>
#include <vector>
using namespace std;
string EscapeForDepfile(const string& path);
/// Visual Studio's cl.exe requires some massaging to work with Ninja;
/// for example, it emits include information on stderr in a funny
/// format when building with /showIncludes. This class parses this
/// output.
struct CLParser {
/// Parse a line of cl.exe output and extract /showIncludes info.
/// If a dependency is extracted, returns a nonempty string.
/// Exposed for testing.
static string FilterShowIncludes(const string& line,
const string& deps_prefix);
/// Return true if a mentioned include file is a system path.
/// Filtering these out reduces dependency information considerably.
static bool IsSystemInclude(string path);
/// Parse a line of cl.exe output and return true if it looks like
/// it's printing an input filename. This is a heuristic but it appears
/// to be the best we can do.
/// Exposed for testing.
static bool FilterInputFilename(string line);
/// Parse the full output of cl, filling filtered_output with the text that
/// should be printed (if any). Returns true on success, or false with err
/// filled. output must not be the same object as filtered_object.
bool Parse(const string& output, const string& deps_prefix,
string* filtered_output, string* err);
set<string> includes_;
/// Wraps a synchronous execution of a CL subprocess.
struct CLWrapper {
CLWrapper() : env_block_(NULL) {}
/// Set the environment block (as suitable for CreateProcess) to be used
/// by Run().
void SetEnvBlock(void* env_block) { env_block_ = env_block; }
/// Start a process and gather its raw output. Returns its exit code.
/// Crashes (calls Fatal()) on error.
int Run(const string& command, string* output);
void* env_block_;