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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
//
// 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 INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_CAS_HPP
#define INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_CAS_HPP
#include <cstddef>
#include <filesystem>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include "gsl/gsl"
#include "src/buildtool/file_system/git_utils.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "src/buildtool/logging/log_level.hpp"
class GitCAS;
using GitCASPtr = std::shared_ptr<GitCAS const>;
/// \brief Git CAS that maintains its Git context.
class GitCAS {
public:
[[nodiscard]] static auto Open(
std::filesystem::path const& repo_path,
LogLevel log_failure = LogLevel::Warning) noexcept -> GitCASPtr;
[[nodiscard]] static auto CreateEmpty() noexcept -> GitCASPtr;
GitCAS() noexcept;
~GitCAS() noexcept = default;
// prohibit moves and copies
GitCAS(GitCAS const&) = delete;
GitCAS(GitCAS&& other) = delete;
auto operator=(GitCAS const&) = delete;
auto operator=(GitCAS&& other) = delete;
[[nodiscard]] auto GetODB() const noexcept -> gsl::not_null<git_odb*> {
return odb_.get();
}
[[nodiscard]] auto GetRepository() const noexcept
-> gsl::not_null<git_repository*> {
return repo_.get();
}
[[nodiscard]] auto GetPath() const noexcept
-> std::filesystem::path const& {
return git_path_;
}
/// \brief Read object from CAS.
/// \param id The object id.
/// \param is_hex_id Specify whether `id` is hex string or raw.
/// \param as_valid_symlink Specify whether to treat any read blob as a
/// valid symlink and check for non-upwardness.
/// \param log_failure Log level at which to log failures accessing the
/// object.
[[nodiscard]] auto ReadObject(std::string const& id,
bool is_hex_id,
bool as_valid_symlink = false,
LogLevel log_failure = LogLevel::Warning)
const noexcept -> std::optional<std::string>;
/// \brief Read object header from CAS.
/// \param id The object id.
/// \param is_hex_id Specify whether `id` is hex string or raw.
// Use with care. Quote from git2/odb.h:138:
// Note that most backends do not support reading only the header of an
// object, so the whole object will be read and then the header will be
// returned.
[[nodiscard]] auto ReadHeader(std::string const& id, bool is_hex_id)
const noexcept -> std::optional<std::pair<std::size_t, ObjectType>>;
private:
std::unique_ptr<git_odb, decltype(&odb_closer)> odb_{nullptr, odb_closer};
std::unique_ptr<git_repository, decltype(&repository_closer)> repo_{
nullptr,
repository_closer};
// git folder path of repo
std::filesystem::path git_path_;
};
#endif // INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_CAS_HPP
|
