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66 lines
2.1 KiB
66 lines
2.1 KiB
/* 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 cmFilePathChecksum_h
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#define cmFilePathChecksum_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 cmFilePathChecksum
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* @brief Generates a checksum for the parent directory of a file
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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 cmFilePathChecksum
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{
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public:
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/// Maximum number of characters to use from the path checksum
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static const size_t partLengthDefault = 10;
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/// @brief Parent directories are empty
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cmFilePathChecksum();
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/// @brief Initilizes the parent directories manually
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cmFilePathChecksum(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 Initilizes the parent directories from a makefile
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cmFilePathChecksum(cmMakefile* makefile);
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/// @brief Allows parent directories setup after construction
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///
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void setupParentDirs(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 the path checksum for the parent directory of a file
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*
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*/
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std::string get(const std::string& filePath) const;
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/* @brief Same as get() but returns only the first length characters
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*
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*/
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std::string getPart(const std::string& filePath,
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size_t length = partLengthDefault) const;
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private:
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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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