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48 lines
1.5 KiB
48 lines
1.5 KiB
15 years ago
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cmake_minimum_required(VERSION 2.8)
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# CMake script that reads a VERSION file and the current git history and the calls configure_file().
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# This is used by version_file() in VersionString.cmake
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if((NOT DEFINED INPUT) OR (NOT DEFINED OUTPUT) OR (NOT DEFINED VERSION_FILE) OR (NOT DEFINED GIT_DIR))
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message(SEND_ERROR "Invalid arguments.")
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endif()
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file(READ "${VERSION_FILE}" BASE_VERSION)
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string(STRIP "${BASE_VERSION}" BASE_VERSION)
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if(EXISTS "${GIT_DIR}")
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file(READ "${GIT_DIR}/HEAD" GIT_HEAD)
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string(STRIP "${GIT_HEAD}" GIT_HEAD)
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unset(GIT_COMMIT)
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if("${GIT_HEAD}" MATCHES "^ref\\:")
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# Remove the first for characters from GIT_HEAD to get GIT_REF.
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# We can't use a length of -1 for string(SUBSTRING) as cmake < 2.8.5 doesn't support it.
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string(LENGTH "${GIT_HEAD}" GIT_HEAD_LENGTH)
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math(EXPR GIT_REF_LENGTH "${GIT_HEAD_LENGTH} - 4")
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string(SUBSTRING "${GIT_HEAD}" 4 ${GIT_REF_LENGTH} GIT_REF)
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string(STRIP "${GIT_REF}" GIT_REF)
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file(READ "${GIT_DIR}/${GIT_REF}" GIT_HEAD)
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string(STRIP "${GIT_HEAD}" GIT_HEAD)
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endif()
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string(REGEX MATCH "[0-9A-Za-z]+" GIT_COMMIT "${GIT_HEAD}")
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# Create variables for all prefixes of the git comit ID.
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if(GIT_COMMIT)
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string(TOLOWER "${GIT_COMMIT}" GIT_COMMIT)
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string(LENGTH "${GIT_COMMIT}" GIT_COMMIT_LENGTH)
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foreach(i RANGE "${GIT_COMMIT_LENGTH}")
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string(SUBSTRING "${GIT_COMMIT}" 0 ${i} GIT_COMMIT_PREFIX_${i})
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endforeach()
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endif()
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endif()
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configure_file("${INPUT}" "${OUTPUT}" ESCAPE_QUOTES)
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