blob: 212293c864defee13a204b4d41ae96908b646b14 [file] [log] [blame]
// Copyright 2018 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.
// The "srcs_for_embedded_tools" rule in the same package sets the line below to
// include runfiles.h from the correct path. Do not modify the line below.
#include "tools/cpp/runfiles/runfiles_src.h"
#ifdef _WIN32
#include <windows.h>
#else // not _WIN32
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#endif // _WIN32
#include <fstream>
#include <functional>
#include <map>
#include <sstream>
#include <vector>
#ifdef _WIN32
#include <memory>
#endif // _WIN32
namespace bazel {
namespace tools {
namespace cpp {
namespace runfiles {
using std::function;
using std::map;
using std::pair;
using std::string;
using std::vector;
namespace {
bool starts_with(const string& s, const char* prefix) {
if (!prefix || !*prefix) {
return true;
}
if (s.empty()) {
return false;
}
return s.find(prefix) == 0;
}
bool contains(const string& s, const char* substr) {
if (!substr || !*substr) {
return true;
}
if (s.empty()) {
return false;
}
return s.find(substr) != string::npos;
}
bool ends_with(const string& s, const string& suffix) {
if (suffix.empty()) {
return true;
}
if (s.empty()) {
return false;
}
return s.rfind(suffix) == s.size() - suffix.size();
}
bool IsReadableFile(const string& path) {
return std::ifstream(path).is_open();
}
bool IsDirectory(const string& path) {
#ifdef _WIN32
DWORD attrs = GetFileAttributesA(path.c_str());
return (attrs != INVALID_FILE_ATTRIBUTES) &&
(attrs & FILE_ATTRIBUTE_DIRECTORY);
#else
struct stat buf;
return stat(path.c_str(), &buf) == 0 && S_ISDIR(buf.st_mode);
#endif
}
bool PathsFrom(const std::string& argv0, std::string runfiles_manifest_file,
std::string runfiles_dir, std::string* out_manifest,
std::string* out_directory);
bool PathsFrom(const std::string& argv0, std::string runfiles_manifest_file,
std::string runfiles_dir,
std::function<bool(const std::string&)> is_runfiles_manifest,
std::function<bool(const std::string&)> is_runfiles_directory,
std::string* out_manifest, std::string* out_directory);
bool ParseManifest(const string& path, map<string, string>* result,
string* error);
} // namespace
Runfiles* Runfiles::Create(const string& argv0,
const string& runfiles_manifest_file,
const string& runfiles_dir, string* error) {
string manifest, directory;
if (!PathsFrom(argv0, runfiles_manifest_file, runfiles_dir, &manifest,
&directory)) {
if (error) {
std::ostringstream err;
err << "ERROR: " << __FILE__ << "(" << __LINE__
<< "): cannot find runfiles (argv0=\"" << argv0 << "\")";
*error = err.str();
}
return nullptr;
}
const vector<pair<string, string> > envvars = {
{"RUNFILES_MANIFEST_FILE", manifest},
{"RUNFILES_DIR", directory},
// TODO(laszlocsomor): remove JAVA_RUNFILES once the Java launcher can
// pick up RUNFILES_DIR.
{"JAVA_RUNFILES", directory}};
map<string, string> runfiles;
if (!manifest.empty()) {
if (!ParseManifest(manifest, &runfiles, error)) {
return nullptr;
}
}
return new Runfiles(std::move(runfiles), std::move(directory),
std::move(envvars));
}
bool IsAbsolute(const string& path) {
if (path.empty()) {
return false;
}
char c = path.front();
return (c == '/' && (path.size() < 2 || path[1] != '/')) ||
(path.size() >= 3 &&
((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) &&
path[1] == ':' && (path[2] == '\\' || path[2] == '/'));
}
string GetEnv(const string& key) {
#ifdef _WIN32
DWORD size = ::GetEnvironmentVariableA(key.c_str(), NULL, 0);
if (size == 0) {
return string(); // unset or empty envvar
}
std::unique_ptr<char[]> value(new char[size]);
::GetEnvironmentVariableA(key.c_str(), value.get(), size);
return value.get();
#else
char* result = getenv(key.c_str());
return (result == NULL) ? string() : string(result);
#endif
}
string Runfiles::Rlocation(const string& path) const {
if (path.empty() || starts_with(path, "../") || contains(path, "/..") ||
starts_with(path, "./") || contains(path, "/./") ||
ends_with(path, "/.") || contains(path, "//")) {
return string();
}
if (IsAbsolute(path)) {
return path;
}
const auto value = runfiles_map_.find(path);
if (value != runfiles_map_.end()) {
return value->second;
}
if (!directory_.empty()) {
return directory_ + "/" + path;
}
return "";
}
namespace {
bool ParseManifest(const string& path, map<string, string>* result,
string* error) {
std::ifstream stm(path);
if (!stm.is_open()) {
if (error) {
std::ostringstream err;
err << "ERROR: " << __FILE__ << "(" << __LINE__
<< "): cannot open runfiles manifest \"" << path << "\"";
*error = err.str();
}
return false;
}
string line;
std::getline(stm, line);
size_t line_count = 1;
while (!line.empty()) {
string::size_type idx = line.find_first_of(' ');
if (idx == string::npos) {
if (error) {
std::ostringstream err;
err << "ERROR: " << __FILE__ << "(" << __LINE__
<< "): bad runfiles manifest entry in \"" << path << "\" line #"
<< line_count << ": \"" << line << "\"";
*error = err.str();
}
return false;
}
(*result)[line.substr(0, idx)] = line.substr(idx + 1);
std::getline(stm, line);
++line_count;
}
return true;
}
} // namespace
namespace testing {
bool TestOnly_PathsFrom(const string& argv0, string mf, string dir,
function<bool(const string&)> is_runfiles_manifest,
function<bool(const string&)> is_runfiles_directory,
string* out_manifest, string* out_directory) {
return PathsFrom(argv0, mf, dir, is_runfiles_manifest, is_runfiles_directory,
out_manifest, out_directory);
}
bool TestOnly_IsAbsolute(const string& path) { return IsAbsolute(path); }
} // namespace testing
Runfiles* Runfiles::Create(const string& argv0, string* error) {
return Runfiles::Create(argv0, GetEnv("RUNFILES_MANIFEST_FILE"),
GetEnv("RUNFILES_DIR"), error);
}
Runfiles* Runfiles::CreateForTest(std::string* error) {
return Runfiles::Create(std::string(), GetEnv("RUNFILES_MANIFEST_FILE"),
GetEnv("TEST_SRCDIR"), error);
}
namespace {
bool PathsFrom(const string& argv0, string mf, string dir, string* out_manifest,
string* out_directory) {
return PathsFrom(argv0, mf, dir,
[](const string& path) { return IsReadableFile(path); },
[](const string& path) { return IsDirectory(path); },
out_manifest, out_directory);
}
bool PathsFrom(const string& argv0, string mf, string dir,
function<bool(const string&)> is_runfiles_manifest,
function<bool(const string&)> is_runfiles_directory,
string* out_manifest, string* out_directory) {
out_manifest->clear();
out_directory->clear();
bool mfValid = is_runfiles_manifest(mf);
bool dirValid = is_runfiles_directory(dir);
if (!argv0.empty() && !mfValid && !dirValid) {
mf = argv0 + ".runfiles/MANIFEST";
dir = argv0 + ".runfiles";
mfValid = is_runfiles_manifest(mf);
dirValid = is_runfiles_directory(dir);
if (!mfValid) {
mf = argv0 + ".runfiles_manifest";
mfValid = is_runfiles_manifest(mf);
}
}
if (!mfValid && !dirValid) {
return false;
}
if (!mfValid) {
mf = dir + "/MANIFEST";
mfValid = is_runfiles_manifest(mf);
if (!mfValid) {
mf = dir + "_manifest";
mfValid = is_runfiles_manifest(mf);
}
}
if (!dirValid &&
(ends_with(mf, ".runfiles_manifest") || ends_with(mf, "/MANIFEST"))) {
static const size_t kSubstrLen = 9; // "_manifest" or "/MANIFEST"
dir = mf.substr(0, mf.size() - kSubstrLen);
dirValid = is_runfiles_directory(dir);
}
if (mfValid) {
*out_manifest = mf;
}
if (dirValid) {
*out_directory = dir;
}
return true;
}
} // namespace
} // namespace runfiles
} // namespace cpp
} // namespace tools
} // namespace bazel