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96 lines
2.8 KiB
96 lines
2.8 KiB
3 years ago
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <clang/AST/AST.h>
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#include <llvm/ADT/SmallVector.h>
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#include <llvm/Support/Path.h>
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#include <vector>
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#include "FileUtils.h"
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namespace FileUtils {
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/**
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* Simplify away "." and ".." elements.
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* If pathToNormalize is a relative path, it will be pre-pended with
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* currentWorkingDirectory unless currentWorkingDirectory == "".
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*/
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std::string makeAbsolutePath(const std::string ¤tWorkingDirectory,
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std::string path) {
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llvm::SmallVector<char, 16> result;
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std::vector<std::string> elements;
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int skip = 0;
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if (llvm::sys::path::is_relative(path)) {
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// Prepend currentWorkingDirectory to path (unless currentWorkingDirectory
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// is empty).
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llvm::SmallVector<char, 16> vec(currentWorkingDirectory.begin(),
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currentWorkingDirectory.end());
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llvm::sys::path::append(vec, path);
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path = std::string(vec.begin(), vec.end());
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} else {
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// Else copy the separator to maintain an absolute path.
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result.append(1, path.front());
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}
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elements.push_back(llvm::sys::path::filename(path).str());
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while (llvm::sys::path::has_parent_path(path)) {
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path = llvm::sys::path::parent_path(path).str();
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const std::string &element(llvm::sys::path::filename(path).str());
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if (element == ".") {
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continue;
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}
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if (element == "..") {
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skip++;
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continue;
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}
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if (skip > 0) {
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skip--;
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continue;
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}
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elements.push_back(element);
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}
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while (skip > 0) {
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elements.push_back("..");
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skip--;
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}
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for (auto I = elements.rbegin(), E = elements.rend(); I != E; I++) {
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llvm::sys::path::append(result, *I);
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}
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return std::string(result.begin(), result.end());
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}
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std::string makeRelativePath(const std::string &repoRoot,
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const std::string &sysRoot,
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bool keepExternalPaths,
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bool allowSiblingsToRepoRoot,
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const std::string &path) {
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if (repoRoot != "") {
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if (llvm::StringRef(path).startswith(repoRoot + "/")) {
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return path.substr(repoRoot.size() + 1);
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}
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if (allowSiblingsToRepoRoot) {
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std::string parentOfRoot = llvm::sys::path::parent_path(repoRoot).str();
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if (llvm::StringRef(path).startswith(parentOfRoot + "/")) {
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return "../" + path.substr(parentOfRoot.size() + 1);
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}
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}
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}
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if (sysRoot != "" && llvm::StringRef(path).startswith(sysRoot + "/")) {
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// Intentionally keep the heading "/" in this case.
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return path.substr(sysRoot.size());
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}
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if (keepExternalPaths) {
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return path;
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}
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return "";
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}
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} // namespace FileUtils
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