3rdparty/cmake/FindLIBARCHIVE.cmake

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#
#     http://www.apache.org/licenses/LICENSE-2.0
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include(FindPackageHelper)

# TODO(tillt): Consider moving "_ROOT_DIR" logic into FindPackageHelper.
if ("${LIBARCHIVE_ROOT_DIR}" STREQUAL "")
  # NOTE: If this fails, stderr is ignored, and the output variable is empty.
  # This has no deleterious effect on our path search.
  execute_process(
    COMMAND brew --prefix libarchive
    OUTPUT_VARIABLE LIBARCHIVE_PREFIX
    OUTPUT_STRIP_TRAILING_WHITESPACE)

  set(POSSIBLE_LIBARCHIVE_INCLUDE_DIRS "")
  set(POSSIBLE_LIBARCHIVE_LIB_DIRS "")

  if (NOT "${LIBARCHIVE_PREFIX}" STREQUAL "")
    list(APPEND POSSIBLE_LIBARCHIVE_INCLUDE_DIRS ${LIBARCHIVE_PREFIX}/include)
    list(APPEND POSSIBLE_LIBARCHIVE_LIB_DIRS ${LIBARCHIVE_PREFIX}/lib)
  endif()

  list(
    APPEND POSSIBLE_LIBARCHIVE_INCLUDE_DIRS
    /usr/include/libarchive
    /usr/local/include/libarchive)

  list(
    APPEND POSSIBLE_LIBARCHIVE_LIB_DIRS
    /usr/lib
    /usr/local/lib)
else()
  set(POSSIBLE_LIBARCHIVE_INCLUDE_DIRS ${LIBARCHIVE_ROOT_DIR}/include)
  set(POSSIBLE_LIBARCHIVE_LIB_DIRS ${LIBARCHIVE_ROOT_DIR}/lib)
endif()

set(LIBARCHIVE_LIBRARY_NAMES archive)

FIND_PACKAGE_HELPER(LIBARCHIVE archive.h)