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I'm about to want to embed the current git commit into a Halibut source file, for which I'll need to add a second output mode to the existing script that finds it out.
53 lines
1.6 KiB
CMake
53 lines
1.6 KiB
CMake
# Pure cmake script to write out cmake_commit.h
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set(DEFAULT_COMMIT "unavailable")
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set(commit "${DEFAULT_COMMIT}")
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execute_process(
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COMMAND ${GIT_EXECUTABLE} -C ${TOPLEVEL_SOURCE_DIR}
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rev-parse --show-toplevel
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OUTPUT_VARIABLE git_worktree
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ERROR_VARIABLE stderr
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RESULT_VARIABLE status)
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string(REGEX REPLACE "\n$" "" git_worktree "${git_worktree}")
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if(status EQUAL 0)
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if(git_worktree STREQUAL TOPLEVEL_SOURCE_DIR)
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execute_process(
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COMMAND ${GIT_EXECUTABLE} -C ${TOPLEVEL_SOURCE_DIR}
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rev-parse HEAD
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OUTPUT_VARIABLE git_commit
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ERROR_VARIABLE stderr
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RESULT_VARIABLE status)
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if(status EQUAL 0)
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string(REGEX REPLACE "\n$" "" commit "${git_commit}")
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else()
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if(commit STREQUAL "unavailable")
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message("Unable to determine git commit: 'git rev-parse HEAD' returned status ${status} and error output:\n${stderr}\n")
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endif()
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endif()
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else()
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if(commit STREQUAL "unavailable")
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message("Unable to determine git commit: top-level source dir ${TOPLEVEL_SOURCE_DIR} is not the root of a repository")
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endif()
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endif()
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else()
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if(commit STREQUAL "unavailable")
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message("Unable to determine git commit: 'git rev-parse --show-toplevel' returned status ${status} and error output:\n${stderr}\n")
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endif()
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endif()
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if(OUTPUT_TYPE STREQUAL header)
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file(WRITE "${OUTPUT_FILE}" "\
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/*
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* cmake_commit.h - string literal giving the source git commit, if known.
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*
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* Generated by cmake/gitcommit.cmake.
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*/
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const char commitid[] = \"${commit}\";
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")
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else()
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message(FATAL_ERROR "Set OUTPUT_TYPE when running this script")
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endif()
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