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70 lines
2.5 KiB
70 lines
2.5 KiB
8 years ago
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/* 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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#ifndef cmFilePathUuid_h
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#define cmFilePathUuid_h
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#include <cmConfigure.h> // IWYU pragma: keep
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#include <stddef.h>
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#include <string>
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#include <utility>
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class cmMakefile;
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/** \class cmFilePathUuid
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* @brief Generates a unique pathless file name with a checksum component
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* calculated from the file path.
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*
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* The checksum is calculated from the relative file path to the
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* closest known project directory. This guarantees reproducibility
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* when source and build directory differ e.g. for different project
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* build directories.
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*/
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class cmFilePathUuid
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{
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public:
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/// Maximum number of characters to use from the file name
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static const size_t partLengthName = 14;
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/// Maximum number of characters to use from the path checksum
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static const size_t partLengthCheckSum = 14;
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/// @brief Initilizes the parent directories from a makefile
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cmFilePathUuid(cmMakefile* makefile);
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/// @brief Initilizes the parent directories manually
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cmFilePathUuid(const std::string& currentSrcDir,
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const std::string& currentBinDir,
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const std::string& projectSrcDir,
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const std::string& projectBinDir);
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/* @brief Calculates and returns the uuid for a file path
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*
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* @arg outputPrefix optional string to prepend to the result
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* @arg outputSuffix optional string to append to the result
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*/
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std::string get(const std::string& filePath,
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const char* outputPrefix = CM_NULLPTR,
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const char* outputSuffix = CM_NULLPTR);
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private:
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void initParentDirs(const std::string& currentSrcDir,
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const std::string& currentBinDir,
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const std::string& projectSrcDir,
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const std::string& projectBinDir);
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/// Returns the relative path and the parent directory key string (seed)
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void GetRelPathSeed(const std::string& filePath, std::string& sourceRelPath,
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std::string& sourceRelSeed);
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std::string GetChecksumString(const std::string& sourceFilename,
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const std::string& sourceRelPath,
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const std::string& sourceRelSeed);
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/// Size of the parent directory list
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static const size_t numParentDirs = 4;
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/// List of (directory name, seed name) pairs
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std::pair<std::string, std::string> parentDirs[numParentDirs];
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};
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#endif
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