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
|
// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "chrome/installer/util/duplicate_tree_detector.h"
#include "base/check.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
namespace installer {
bool IsIdenticalFileHierarchy(const base::FilePath& src_path,
const base::FilePath& dest_path) {
base::File::Info src_info;
base::File::Info dest_info;
bool is_identical = false;
if (base::GetFileInfo(src_path, &src_info) &&
base::GetFileInfo(dest_path, &dest_info)) {
// Both paths exist, check the types:
if (!src_info.is_directory && !dest_info.is_directory) {
// Two files are "identical" if the file sizes are equivalent.
is_identical = src_info.size == dest_info.size;
#if !defined(OFFICIAL_BUILD)
// For developer builds, also check last modification time (to make sure
// version dir DLLs are replaced on over-install even if the tested change
// doesn't happen to change a given DLL's size).
if (is_identical)
is_identical = (src_info.last_modified == dest_info.last_modified);
#endif
} else if (src_info.is_directory && dest_info.is_directory) {
// Two directories are "identical" if dest_path contains entries that are
// "identical" to all the entries in src_path.
is_identical = true;
base::FileEnumerator path_enum(
src_path, false /* not recursive */,
base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES);
for (base::FilePath path = path_enum.Next();
is_identical && !path.empty(); path = path_enum.Next()) {
is_identical =
IsIdenticalFileHierarchy(path, dest_path.Append(path.BaseName()));
}
} else {
// The two paths are of different types, so they cannot be identical.
DCHECK(!is_identical);
}
}
return is_identical;
}
} // namespace installer
|
