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// Copyright 2020 The Bazel Authors. All rights reserved.
//
// 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.
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <regex> // NOLINT
#include <unordered_set>
using std::ifstream;
using std::regex;
using std::string;
using std::unordered_set;
string getBasename(const string &path) {
// Assumes we're on an OS with "/" as the path separator
auto idx = path.find_last_of("/");
if (idx == string::npos) {
return path;
}
return path.substr(idx + 1);
}
// Returns 0 if there are no duplicate basenames in the object files (both via
// -filelist as well as shell args), 1 otherwise
int main(int argc, const char *argv[]) {
unordered_set<string> basenames;
const regex libRegex = regex(".*\\.a$");
const regex noArgFlags =
regex("-static|-s|-a|-c|-L|-T|-D|-no_warning_for_no_symbols");
const regex singleArgFlags = regex("-arch_only|-syslibroot|-o");
// Set i to 1 to skip executable path
for (int i = 1; argv[i] != nullptr; i++) {
const string arg = argv[i];
if (arg == "-filelist") {
ifstream list(argv[i + 1]);
for (string line; getline(list, line);) {
const string basename = getBasename(line);
const auto pair = basenames.insert(basename);
if (!pair.second) {
return EXIT_FAILURE;
}
}
list.close();
i++;
} else if (regex_match(arg, noArgFlags)) {
} else if (regex_match(arg, singleArgFlags)) {
i++;
} else if (arg[0] == '-') {
return EXIT_FAILURE;
// Unrecognized flag, let the wrapper deal with it
} else if (regex_match(arg, libRegex)) {
// Archive inputs can remain untouched, as they come from other targets.
} else {
const string basename = getBasename(arg);
const auto pair = basenames.insert(basename);
if (!pair.second) {
return EXIT_FAILURE;
}
}
}
return EXIT_SUCCESS;
}
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