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85 lines
2.6 KiB
85 lines
2.6 KiB
3 years ago
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find_package(Git QUIET REQUIRED)
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include(ExternalProject)
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set(srcRepo ${CMAKE_CURRENT_BINARY_DIR}/srcRepo)
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set(srcDir ${CMAKE_CURRENT_BINARY_DIR}/src)
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set(binDir ${CMAKE_CURRENT_BINARY_DIR}/build)
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file(MAKE_DIRECTORY ${srcRepo})
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file(MAKE_DIRECTORY ${srcDir})
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file(GLOB entries ${srcRepo}/*)
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file(REMOVE_RECURSE ${entries} ${binDir})
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file(TOUCH ${srcRepo}/firstFile.txt)
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configure_file(${CMAKE_CURRENT_LIST_DIR}/FetchGitRefs/CMakeLists.txt
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${srcDir}/CMakeLists.txt COPYONLY)
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function(execGitCommand)
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execute_process(
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WORKING_DIRECTORY ${srcRepo}
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COMMAND ${GIT_EXECUTABLE} ${ARGN}
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COMMAND_ECHO STDOUT
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COMMAND_ERROR_IS_FATAL ANY
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)
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endfunction()
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function(configureAndBuild tag)
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execute_process(COMMAND ${CMAKE_COMMAND}
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-G ${CMAKE_GENERATOR} -T "${CMAKE_GENERATOR_TOOLSET}"
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-A "${CMAKE_GENERATOR_PLATFORM}"
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-D repoDir:PATH=${srcRepo}
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-D gitTag:STRING=${tag}
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-B ${binDir}
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-S ${srcDir}
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COMMAND_ECHO STDOUT
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COMMAND_ERROR_IS_FATAL ANY
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)
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execute_process(COMMAND ${CMAKE_COMMAND} --build ${binDir} --target fetcher
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WORKING_DIRECTORY ${binDir}
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COMMAND_ECHO STDOUT
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COMMAND_ERROR_IS_FATAL ANY
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)
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endfunction()
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# Setup a fresh source repo with a predictable default branch across all
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# git versions
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execGitCommand(-c init.defaultBranch=master init)
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execGitCommand(config --add user.email "testauthor@cmake.org")
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execGitCommand(config --add user.name testauthor)
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# Create the initial repo structure
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execGitCommand(add firstFile.txt)
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execGitCommand(commit -m "First file")
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message(STATUS "First configure-and-build")
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configureAndBuild(master)
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# Create a tagged commit that is not on any branch. With git 2.20 or later,
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# this commit won't be fetched without the --tags option.
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file(TOUCH ${srcRepo}/secondFile.txt)
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execGitCommand(add secondFile.txt)
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execGitCommand(commit -m "Second file")
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execGitCommand(tag -a -m "Adding tag" tag_of_interest)
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execGitCommand(reset --hard HEAD~1)
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message(STATUS "Configure-and-build, update to tag")
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configureAndBuild(tag_of_interest)
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# Do the same, but this time for a commit hash
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file(TOUCH ${srcRepo}/thirdFile.txt)
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execGitCommand(add thirdFile.txt)
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execGitCommand(commit -m "Third file")
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execGitCommand(tag -a -m "Adding another tag" check_for_hash)
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execGitCommand(reset --hard HEAD~1)
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execute_process(
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WORKING_DIRECTORY ${srcRepo}
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COMMAND ${GIT_EXECUTABLE} rev-parse check_for_hash
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COMMAND_ERROR_IS_FATAL ANY
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OUTPUT_VARIABLE commit_hash
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OUTPUT_STRIP_TRAILING_WHITESPACE
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)
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message(STATUS "Configure-and-build, update to commit hash ${commit_hash}")
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configureAndBuild(${commit_hash})
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