1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// Copyright 2018 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.
#ifndef BAZEL_SRC_MAIN_CPP_RC_FILE_H_
#define BAZEL_SRC_MAIN_CPP_RC_FILE_H_
#include <deque>
#include <memory>
#include <unordered_map>
#include <string>
#include <vector>
#include "src/main/cpp/workspace_layout.h"
namespace blaze {
// Single option in an rc file.
struct RcOption {
// Keep a pointer to the path string to avoid copying it over and over.
std::string* source_path;
std::string option;
};
// Reads and parses a single rc file with all its imports.
class RcFile {
public:
// Constructs a parsed rc file object, or returns a nullptr and sets the
// error and error text on failure.
enum class ParseError { NONE, UNREADABLE_FILE, INVALID_FORMAT, IMPORT_LOOP };
static std::unique_ptr<RcFile> Parse(
std::string filename, const WorkspaceLayout* workspace_layout,
std::string workspace, ParseError* error, std::string* error_text);
// Returns all relevant rc sources for this file (including itself).
const std::deque<std::string>& sources() const { return rcfile_paths_; }
// Command -> all options for that command (in order of appearance).
using OptionMap = std::unordered_map<std::string, std::vector<RcOption>>;
const OptionMap& options() const { return options_; }
private:
RcFile(std::string filename, const WorkspaceLayout* workspace_layout,
std::string workspace);
// Don't allow copying or moving because it can be tricky with the RcOption
// string pointers.
RcFile(const RcFile&) = delete;
RcFile& operator=(const RcFile&) = delete;
// Recursive call to parse a file and its imports.
ParseError ParseFile(const std::string& filename,
std::deque<std::string>* import_stack,
std::string* error_text);
const std::string filename_;
// Workspace definition.
const WorkspaceLayout* const workspace_layout_;
const std::string workspace_;
// Full closure of rcfile paths imported from this file (including itself).
// The RcOption structs point to the strings in here so they need to be stored
// in a container that offers stable pointers, like a deque (and not vector).
std::deque<std::string> rcfile_paths_;
// All options parsed from the file.
OptionMap options_;
};
} // namespace blaze
#endif // BAZEL_SRC_MAIN_CPP_RC_FILE_H_
|
