1 // Copyright (C) 2017 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <header_abi_util.h>
16
17 #include <llvm/Support/raw_ostream.h>
18 #include <llvm/Support/FileSystem.h>
19 #include <llvm/Support/Path.h>
20
21 #include <set>
22 #include <string>
23 #include <vector>
24
25 namespace abi_util {
26
ShouldSkipFile(llvm::StringRef & file_name)27 static bool ShouldSkipFile(llvm::StringRef &file_name) {
28 // Ignore swap files and hidden files / dirs. Do not recurse into them too.
29 // We should also not look at source files. Many projects include source
30 // files in their exports.
31 if (file_name.empty() || file_name.startswith(".") ||
32 file_name.endswith(".swp") || file_name.endswith(".swo") ||
33 file_name.endswith("#") || file_name.endswith(".cpp") ||
34 file_name.endswith(".cc") || file_name.endswith(".c")) {
35 return true;
36 }
37 return false;
38 }
39
RealPath(const std::string & path)40 std::string RealPath(const std::string &path) {
41 char file_abs_path[PATH_MAX];
42 if (realpath(path.c_str(), file_abs_path) == nullptr) {
43 return "";
44 }
45 return file_abs_path;
46 }
47
CollectExportedHeaderSet(const std::string & dir_name,std::set<std::string> * exported_headers)48 bool CollectExportedHeaderSet(const std::string &dir_name,
49 std::set<std::string> *exported_headers) {
50 std::error_code ec;
51 llvm::sys::fs::recursive_directory_iterator walker(dir_name, ec);
52 // Default construction - end of directory.
53 llvm::sys::fs::recursive_directory_iterator end;
54 llvm::sys::fs::file_status status;
55 for ( ; walker != end; walker.increment(ec)) {
56 if (ec) {
57 llvm::errs() << "Failed to walk dir : " << dir_name << "\n";
58 return false;
59 }
60
61 const std::string &file_path = walker->path();
62
63 llvm::StringRef file_name(llvm::sys::path::filename(file_path));
64 // Ignore swap files and hidden files / dirs. Do not recurse into them too.
65 // We should also not look at source files. Many projects include source
66 // files in their exports.
67 if (ShouldSkipFile(file_name)) {
68 walker.no_push();
69 continue;
70 }
71
72 if (walker->status(status)) {
73 llvm::errs() << "Failed to stat file : " << file_path << "\n";
74 return false;
75 }
76
77 if ((status.type() != llvm::sys::fs::file_type::symlink_file) &&
78 !llvm::sys::fs::is_regular_file(status)) {
79 // Ignore non regular files, except symlinks.
80 continue;
81 }
82
83 exported_headers->insert(RealPath(file_path));
84 }
85 return true;
86 }
87
CollectAllExportedHeaders(const std::vector<std::string> & exported_header_dirs)88 std::set<std::string> CollectAllExportedHeaders(
89 const std::vector<std::string> &exported_header_dirs) {
90 std::set<std::string> exported_headers;
91 for (auto &&dir : exported_header_dirs) {
92 if (!abi_util::CollectExportedHeaderSet(dir, &exported_headers)) {
93 llvm::errs() << "Couldn't collect exported headers\n";
94 ::exit(1);
95 }
96 }
97 return exported_headers;
98 }
99
100 } // namespace abi_util
101