1// Copyright 2015 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef NINJA_CLPARSER_H_
16#define NINJA_CLPARSER_H_
17
18#include <set>
19#include <string>
20
21/// Visual Studio's cl.exe requires some massaging to work with Ninja;
22/// for example, it emits include information on stderr in a funny
23/// format when building with /showIncludes. This class parses this
24/// output.
25struct CLParser {
26 /// Parse a line of cl.exe output and extract /showIncludes info.
27 /// If a dependency is extracted, returns a nonempty string.
28 /// Exposed for testing.
29 static std::string FilterShowIncludes(const std::string& line,
30 const std::string& deps_prefix);
31
32 /// Return true if a mentioned include file is a system path.
33 /// Filtering these out reduces dependency information considerably.
34 static bool IsSystemInclude(std::string path);
35
36 /// Parse a line of cl.exe output and return true if it looks like
37 /// it's printing an input filename. This is a heuristic but it appears
38 /// to be the best we can do.
39 /// Exposed for testing.
40 static bool FilterInputFilename(std::string line);
41
42 /// Parse the full output of cl, filling filtered_output with the text that
43 /// should be printed (if any). Returns true on success, or false with err
44 /// filled. output must not be the same object as filtered_object.
45 bool Parse(const std::string& output, const std::string& deps_prefix,
46 std::string* filtered_output, std::string* err);
47
48 std::set<std::string> includes_;
49};
50
51#endif // NINJA_CLPARSER_H_
52