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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// REQUIRES: can-create-symlinks
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: no-filesystem
// UNSUPPORTED: availability-filesystem-missing
// <filesystem>
// recursive_directory_iterator
#include <filesystem>
#include <type_traits>
#include <set>
#include <cassert>
#include "test_macros.h"
#include "filesystem_test_helper.h"
namespace fs = std::filesystem;
#if defined(_WIN32)
static void set_last_write_time_in_iteration(const fs::path& dir) {
// Windows can postpone updating last write time for file especially for
// directory because last write time of directory depends of its childs.
// See
// https://learn.microsoft.com/en-us/windows/win32/sysinfo/file-times
// To force updating file entries calls "last_write_time" with own value.
const fs::recursive_directory_iterator end_it{};
std::error_code ec;
fs::recursive_directory_iterator it(dir, ec);
assert(!ec);
fs::file_time_type now_time = fs::file_time_type::clock::now();
for (; it != end_it; ++it) {
const fs::path entry = *it;
fs::last_write_time(entry, now_time, ec);
assert(!ec);
}
assert(it == end_it);
}
struct directory_entry_and_values {
fs::directory_entry entry;
fs::file_status symlink_status;
fs::file_status status;
std::uintmax_t file_size;
fs::file_time_type last_write_time;
};
std::vector<directory_entry_and_values>
get_directory_entries_for(const fs::path& dir, const std::set<fs::path>& dir_contents) {
const fs::recursive_directory_iterator end_it{};
std::error_code ec;
fs::recursive_directory_iterator it(dir, ec);
assert(!ec);
std::vector<directory_entry_and_values> dir_entries;
std::set<fs::path> unseen_entries = dir_contents;
while (!unseen_entries.empty()) {
assert(it != end_it);
const fs::directory_entry& entry = *it;
assert(unseen_entries.erase(entry.path()) == 1);
dir_entries.push_back(directory_entry_and_values{
.entry = entry,
.symlink_status = entry.symlink_status(),
.status = entry.status(),
.file_size = entry.is_regular_file() ? entry.file_size() : 0,
.last_write_time = entry.last_write_time()});
fs::recursive_directory_iterator& it_ref = it.increment(ec);
assert(!ec);
assert(&it_ref == &it);
}
return dir_entries;
}
#endif // _WIN32
// Checks that the directory_entry properties will be the same before and after
// calling "refresh" in case of iteration.
// In case of Windows expects that directory_entry caches the properties during
// iteration.
static void test_cache_and_refresh_in_iteration() {
static_test_env static_env;
const fs::path test_dir = static_env.Dir;
#if defined(_WIN32)
set_last_write_time_in_iteration(test_dir);
#endif
const std::set<fs::path> dir_contents(static_env.RecDirIterationList.begin(), static_env.RecDirIterationList.end());
const fs::recursive_directory_iterator end_it{};
std::error_code ec;
fs::recursive_directory_iterator it(test_dir, ec);
assert(!ec);
std::set<fs::path> unseen_entries = dir_contents;
while (!unseen_entries.empty()) {
assert(it != end_it);
const fs::directory_entry& entry = *it;
assert(unseen_entries.erase(entry.path()) == 1);
fs::file_status symlink_status = entry.symlink_status();
fs::file_status status = entry.status();
std::uintmax_t file_size = entry.is_regular_file() ? entry.file_size() : 0;
fs::file_time_type last_write_time = entry.last_write_time();
fs::directory_entry mutable_entry = *it;
mutable_entry.refresh();
fs::file_status upd_symlink_status = mutable_entry.symlink_status();
fs::file_status upd_status = mutable_entry.status();
std::uintmax_t upd_file_size = mutable_entry.is_regular_file() ? mutable_entry.file_size() : 0;
fs::file_time_type upd_last_write_time = mutable_entry.last_write_time();
assert(upd_symlink_status.type() == symlink_status.type() &&
upd_symlink_status.permissions() == symlink_status.permissions());
assert(upd_status.type() == status.type() && upd_status.permissions() == status.permissions());
assert(upd_file_size == file_size);
assert(upd_last_write_time == last_write_time);
fs::recursive_directory_iterator& it_ref = it.increment(ec);
assert(!ec);
assert(&it_ref == &it);
}
}
#if defined(_WIN32)
// In case of Windows expects that the directory_entry caches the properties
// during iteration and the properties don't change after deleting folders
// and files.
static void test_cached_values_in_iteration() {
std::vector<directory_entry_and_values> dir_entries;
{
static_test_env static_env;
const fs::path testDir = static_env.Dir;
set_last_write_time_in_iteration(testDir);
const std::set<fs::path> dir_contents(static_env.RecDirIterationList.begin(), static_env.RecDirIterationList.end());
dir_entries = get_directory_entries_for(testDir, dir_contents);
}
// Testing folder should be deleted after destoying static_test_env.
for (const auto& dir_entry : dir_entries) {
// During iteration Windows provides information only about symlink itself
// not about file/folder which symlink points to.
if (dir_entry.entry.is_symlink()) {
// Check that symlink is not using cached value about existing file.
assert(!dir_entry.entry.exists());
} else {
// Check that entry uses cached value about existing file.
assert(dir_entry.entry.exists());
}
fs::file_status symlink_status = dir_entry.entry.symlink_status();
assert(dir_entry.symlink_status.type() == symlink_status.type() &&
dir_entry.symlink_status.permissions() == symlink_status.permissions());
if (!dir_entry.entry.is_symlink()) {
fs::file_status status = dir_entry.entry.status();
assert(dir_entry.status.type() == status.type() && dir_entry.status.permissions() == status.permissions());
std::uintmax_t file_size = dir_entry.entry.is_regular_file() ? dir_entry.entry.file_size() : 0;
assert(dir_entry.file_size == file_size);
fs::file_time_type last_write_time = dir_entry.entry.last_write_time();
assert(dir_entry.last_write_time == last_write_time);
}
}
}
#endif // _WIN32
int main(int, char**) {
test_cache_and_refresh_in_iteration();
#if defined(_WIN32)
test_cached_values_in_iteration();
#endif
return 0;
}
|
