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path: root/cmake/modules/AddSphinxTarget.cmake
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# Handy function for creating the different Sphinx targets.
#
# ``builder`` should be one of the supported builders used by
# the sphinx-build command.
#
# ``project`` should be the project name
function (add_sphinx_target builder project)
  set(SPHINX_BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/${builder}")
  set(SPHINX_DOC_TREE_DIR "${CMAKE_CURRENT_BINARY_DIR}/_doctrees")
  set(SPHINX_TARGET_NAME docs-${project}-${builder})
  add_custom_target(${SPHINX_TARGET_NAME}
                    COMMAND ${SPHINX_EXECUTABLE}
                            -b ${builder}
                            -d "${SPHINX_DOC_TREE_DIR}"
                            -q # Quiet: no output other than errors and warnings.
                            -W # Warnings are errors.
                            "${CMAKE_CURRENT_SOURCE_DIR}" # Source
                            "${SPHINX_BUILD_DIR}" # Output
                    COMMENT
                    "Generating ${builder} Sphinx documentation for ${project}")

  # When "clean" target is run, remove the Sphinx build directory
  set_property(DIRECTORY APPEND PROPERTY
               ADDITIONAL_MAKE_CLEAN_FILES
               "${SPHINX_BUILD_DIR}")

  # We need to remove ${SPHINX_DOC_TREE_DIR} when make clean is run
  # but we should only add this path once
  get_property(_CURRENT_MAKE_CLEAN_FILES
               DIRECTORY PROPERTY ADDITIONAL_MAKE_CLEAN_FILES)
  list(FIND _CURRENT_MAKE_CLEAN_FILES "${SPHINX_DOC_TREE_DIR}" _INDEX)
  if (_INDEX EQUAL -1)
    set_property(DIRECTORY APPEND PROPERTY
                 ADDITIONAL_MAKE_CLEAN_FILES
                 "${SPHINX_DOC_TREE_DIR}")
  endif()

  if (LLVM_BUILD_DOCS)
    add_dependencies(sphinx ${SPHINX_TARGET_NAME})

    # Handle installation
    if (builder STREQUAL man)
      # FIXME: We might not ship all the tools that these man pages describe
      install(DIRECTORY "${SPHINX_BUILD_DIR}/" # Slash indicates contents of
              DESTINATION share/man/man1)

    elseif (builder STREQUAL html)
      install(DIRECTORY "${SPHINX_BUILD_DIR}"
              DESTINATION "share/doc/${project}")
    else()
      message(WARNING Installation of ${builder} not supported)
    endif()
  endif()
endfunction()