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88 lines
3.1 KiB
C++
88 lines
3.1 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmFilePathChecksum.h"
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#include "cmBase32.h"
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#include "cmCryptoHash.h"
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#include "cmMakefile.h"
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#include "cmSystemTools.h"
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#include <vector>
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cmFilePathChecksum::cmFilePathChecksum()
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{
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}
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cmFilePathChecksum::cmFilePathChecksum(std::string const& currentSrcDir,
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std::string const& currentBinDir,
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std::string const& projectSrcDir,
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std::string const& projectBinDir)
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{
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setupParentDirs(currentSrcDir, currentBinDir, projectSrcDir, projectBinDir);
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}
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cmFilePathChecksum::cmFilePathChecksum(cmMakefile* makefile)
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{
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setupParentDirs(makefile->GetCurrentSourceDirectory(),
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makefile->GetCurrentBinaryDirectory(),
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makefile->GetHomeDirectory(),
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makefile->GetHomeOutputDirectory());
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}
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void cmFilePathChecksum::setupParentDirs(std::string const& currentSrcDir,
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std::string const& currentBinDir,
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std::string const& projectSrcDir,
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std::string const& projectBinDir)
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{
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this->parentDirs[0].first = cmSystemTools::GetRealPath(currentSrcDir);
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this->parentDirs[1].first = cmSystemTools::GetRealPath(currentBinDir);
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this->parentDirs[2].first = cmSystemTools::GetRealPath(projectSrcDir);
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this->parentDirs[3].first = cmSystemTools::GetRealPath(projectBinDir);
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this->parentDirs[0].second = "CurrentSource";
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this->parentDirs[1].second = "CurrentBinary";
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this->parentDirs[2].second = "ProjectSource";
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this->parentDirs[3].second = "ProjectBinary";
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}
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std::string cmFilePathChecksum::get(std::string const& filePath) const
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{
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std::string relPath;
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std::string relSeed;
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{
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std::string const fileReal = cmSystemTools::GetRealPath(filePath);
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std::string parentDir;
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// Find closest project parent directory
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for (auto const& pDir : this->parentDirs) {
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if (!pDir.first.empty() &&
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cmsys::SystemTools::IsSubDirectory(fileReal, pDir.first)) {
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parentDir = pDir.first;
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relSeed = pDir.second;
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break;
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}
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}
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// Use file system root as fallback parent directory
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if (parentDir.empty()) {
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relSeed = "FileSystemRoot";
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cmsys::SystemTools::SplitPathRootComponent(fileReal, &parentDir);
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}
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// Calculate relative path from project parent directory
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relPath = cmsys::SystemTools::RelativePath(
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parentDir, cmsys::SystemTools::GetParentDirectory(fileReal));
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}
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// Calculate the file ( seed + relative path ) binary checksum
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std::vector<unsigned char> hashBytes =
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cmCryptoHash(cmCryptoHash::AlgoSHA256).ByteHashString(relSeed + relPath);
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// Convert binary checksum to string
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return cmBase32Encoder().encodeString(&hashBytes.front(), hashBytes.size(),
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false);
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}
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std::string cmFilePathChecksum::getPart(std::string const& filePath,
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size_t length) const
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{
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return get(filePath).substr(0, length);
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}
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