set(LIBRARY_DIR "${ClickHouse_SOURCE_DIR}/contrib/libstemmer_c")
set(STEMMER_INCLUDE_DIR "${LIBRARY_DIR}/include")

FILE ( READ "${LIBRARY_DIR}/mkinc.mak" _CONTENT )
# replace '\ ' into one big line
STRING ( REGEX REPLACE "\\\\\n  " " ${LIBRARY_DIR}/" _CONTENT "${_CONTENT}" )
# escape ';' (if any)
STRING ( REGEX REPLACE ";" "\\\\;" _CONTENT "${_CONTENT}" )
# now replace lf into ';' (it makes list from the line)
STRING ( REGEX REPLACE "\n" ";" _CONTENT "${_CONTENT}" )
FOREACH ( LINE ${_CONTENT} )
    # skip comments (beginning with #)
    IF ( NOT "${LINE}" MATCHES "^#.*" )
        # parse 'name=value1 value2..." - extract the 'name' part
        STRING ( REGEX REPLACE "=.*$" "" _NAME "${LINE}" )
        # extract the list of values part
        STRING ( REGEX REPLACE "^.*=" "" _LIST "${LINE}" )
        # replace (multi)spaces into ';' (it makes list from the line)
        STRING ( REGEX REPLACE " +" ";" _LIST "${_LIST}" )
        # finally get our two variables
        IF ( "${_NAME}" MATCHES "snowball_sources" )
            SET ( _SOURCES "${_LIST}" )
        ELSEIF ( "${_NAME}" MATCHES "snowball_headers" )
            SET ( _HEADERS "${_LIST}" )
        ENDIF ()
    endif ()
endforeach ()

# all the sources parsed. Now just add the lib
add_library(_stemmer ${_SOURCES} ${_HEADERS} )
target_include_directories(_stemmer SYSTEM PUBLIC "${STEMMER_INCLUDE_DIR}")
add_library(ch_contrib::stemmer ALIAS _stemmer)