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// 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.
#include "src/main/cpp/util/path_platform.h"
#include <limits.h> // PATH_MAX
#include <stdlib.h> // getenv
#include <string.h> // strncmp
#include <unistd.h> // access, open, close, fsync
#include "src/main/cpp/util/errors.h"
#include "src/main/cpp/util/exit_code.h"
#include "src/main/cpp/util/file_platform.h"
#include "src/main/cpp/util/logging.h"
#include "src/main/cpp/util/path.h"
namespace blaze_util {
std::string ConvertPath(const std::string &path) { return path; }
std::string PathAsJvmFlag(const std::string &path) { return path; }
bool CompareAbsolutePaths(const std::string &a, const std::string &b) {
return a == b;
}
std::pair<std::string, std::string> SplitPath(const std::string &path) {
size_t pos = path.rfind('/');
// Handle the case with no '/' in 'path'.
if (pos == std::string::npos) return std::make_pair("", path);
// Handle the case with a single leading '/' in 'path'.
if (pos == 0)
return std::make_pair(std::string(path, 0, 1), std::string(path, 1));
return std::make_pair(std::string(path, 0, pos), std::string(path, pos + 1));
}
bool IsDevNull(const char *path) {
return path != nullptr && *path != 0 && strncmp("/dev/null\0", path, 10) == 0;
}
bool IsRootDirectory(const std::string &path) {
return path.size() == 1 && path[0] == '/';
}
bool IsRootDirectory(const Path &path) {
return IsRootDirectory(path.AsNativePath());
}
bool IsAbsolute(const std::string &path) {
return !path.empty() && path[0] == '/';
}
std::string MakeAbsolute(const std::string &path) {
if (blaze_util::IsAbsolute(path) || path.empty()) {
return path;
}
return JoinPath(blaze_util::GetCwd(), path);
}
std::string ResolveEnvvars(const std::string &path) {
std::string result = path;
size_t start = 0;
while ((start = result.find("${", start)) != std::string::npos) {
// Just match to the next }
size_t end = result.find('}', start + 1);
if (end == std::string::npos) {
BAZEL_DIE(blaze_exit_code::LOCAL_ENVIRONMENTAL_ERROR)
<< "ResolveEnvvars(" << path << "): incomplete variable at position "
<< start;
}
// Extract the variable name
const std::string name = result.substr(start + 2, end - start - 2);
// Get the value from the environment
const char *c_value = getenv(name.c_str());
const std::string value = std::string(c_value ? c_value : "");
result.replace(start, end - start + 1, value);
start += value.length();
}
return result;
}
std::string MakeAbsoluteAndResolveEnvvars(const std::string &path) {
return MakeAbsolute(ResolveEnvvars(path));
}
static std::string NormalizeAbsPath(const std::string &p) {
if (p.empty() || p[0] != '/') {
return "";
}
typedef std::string::size_type index;
std::vector<std::pair<index, index> > segments;
for (index s = 0; s < p.size();) {
index e = p.find_first_of('/', s);
if (e == std::string::npos) {
e = p.size();
}
if (e > s) {
if (p.compare(s, e - s, "..") == 0) {
if (!segments.empty()) {
segments.pop_back();
}
} else if (p.compare(s, e - s, ".") != 0) {
segments.push_back(std::make_pair(s, e - s));
}
}
s = e + 1;
}
if (segments.empty()) {
return "/";
} else {
std::stringstream r;
for (const auto &s : segments) {
r << "/" << p.substr(s.first, s.second);
}
if (p[p.size() - 1] == '/') {
r << "/";
}
return r.str();
}
}
std::string TestOnly_NormalizeAbsPath(const std::string &s) {
return NormalizeAbsPath(s);
}
Path::Path(const std::string &path)
: path_(NormalizeAbsPath(MakeAbsolute(path))) {}
Path::Path(const std::string &path, std::string *errorText)
: path_(NormalizeAbsPath(MakeAbsolute(path))) {}
bool Path::IsNull() const { return path_ == "/dev/null"; }
bool Path::Contains(const char c) const {
return path_.find_first_of(c) != std::string::npos;
}
bool Path::Contains(const std::string &s) const {
return path_.find(s) != std::string::npos;
}
Path Path::GetRelative(const std::string &r) const {
return Path(JoinPath(path_, r));
}
Path Path::Canonicalize() const { return Path(MakeCanonical(path_.c_str())); }
Path Path::GetParent() const { return Path(SplitPath(path_).first); }
std::string Path::AsPrintablePath() const { return path_; }
std::string Path::AsJvmArgument() const { return path_; }
std::string Path::AsCommandLineArgument() const { return path_; }
} // namespace blaze_util