blob: 8371d78539bc490803b6e4fcaaa7c332680ca4d3 (
plain)
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
|
#ifndef INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_TREE_HPP
#define INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_TREE_HPP
#include <filesystem>
#include <optional>
#include <unordered_map>
#include "gsl-lite/gsl-lite.hpp"
#include "src/buildtool/file_system/git_cas.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "src/utils/cpp/atomic.hpp"
#include "src/utils/cpp/hex_string.hpp"
class GitTreeEntry;
using GitTreeEntryPtr = std::shared_ptr<GitTreeEntry const>;
class GitTree {
friend class GitTreeEntry;
public:
using entries_t =
std::unordered_map<std::string, gsl::not_null<GitTreeEntryPtr>>;
/// \brief Read tree with given id from Git repository.
/// \param repo_path Path to the Git repository.
/// \param tree_id Tree id as as hex string.
[[nodiscard]] static auto Read(std::filesystem::path const& repo_path,
std::string const& tree_id) noexcept
-> std::optional<GitTree>;
/// \brief Read tree with given id from CAS.
/// \param cas Git CAS that contains the tree id.
/// \param tree_id Tree id as as hex string.
[[nodiscard]] static auto Read(gsl::not_null<GitCASPtr> const& cas,
std::string const& tree_id) noexcept
-> std::optional<GitTree>;
/// \brief Lookup by dir entry name. '.' and '..' are not allowed.
[[nodiscard]] auto LookupEntryByName(std::string const& name) const noexcept
-> GitTreeEntryPtr;
/// \brief Lookup by relative path. '.' is not allowed.
[[nodiscard]] auto LookupEntryByPath(
std::filesystem::path const& path) const noexcept -> GitTreeEntryPtr;
[[nodiscard]] auto begin() const noexcept { return entries_.begin(); }
[[nodiscard]] auto end() const noexcept { return entries_.end(); }
[[nodiscard]] auto Hash() const noexcept { return ToHexString(raw_id_); }
[[nodiscard]] auto RawHash() const noexcept { return raw_id_; }
private:
gsl::not_null<GitCASPtr> cas_;
entries_t entries_;
std::string raw_id_;
GitTree(gsl::not_null<GitCASPtr> cas,
entries_t&& entries,
std::string raw_id) noexcept
: cas_{std::move(cas)},
entries_{std::move(entries)},
raw_id_{std::move(raw_id)} {}
};
class GitTreeEntry {
public:
GitTreeEntry(gsl::not_null<GitCASPtr> cas,
std::string raw_id,
ObjectType type) noexcept
: cas_{std::move(cas)}, raw_id_{std::move(raw_id)}, type_{type} {}
[[nodiscard]] auto IsBlob() const noexcept { return IsFileObject(type_); }
[[nodiscard]] auto IsTree() const noexcept { return IsTreeObject(type_); }
[[nodiscard]] auto Blob() const noexcept -> std::optional<std::string>;
[[nodiscard]] auto Tree() && = delete;
[[nodiscard]] auto Tree() const& noexcept -> std::optional<GitTree> const&;
[[nodiscard]] auto Hash() const noexcept { return ToHexString(raw_id_); }
[[nodiscard]] auto Type() const noexcept { return type_; }
// Use with care. Implementation might read entire object to obtain size.
// Consider using Blob()->size() instead.
[[nodiscard]] auto Size() const noexcept -> std::optional<std::size_t>;
private:
gsl::not_null<GitCASPtr> cas_;
std::string raw_id_;
ObjectType type_;
mutable atomic_shared_ptr<std::optional<GitTree>> tree_cached_{nullptr};
mutable std::atomic<bool> tree_loading_{false};
};
using GitTreePtr = std::shared_ptr<GitTree const>;
#endif // INCLUDED_SRC_BUILDTOOL_FILE_SYSTEM_GIT_TREE_HPP
|
