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cmake_minimum_required(VERSION 3.6)

set(EMACS_LISP_SOURCES
  ledger-check.el
  ledger-commodities.el
  ledger-complete.el
  ledger-context.el
  ledger-exec.el
  ledger-fontify.el
  ledger-fonts.el
  ledger-init.el
  ledger-mode.el
  ledger-navigate.el
  ledger-occur.el
  ledger-post.el
  ledger-reconcile.el
  ledger-regex.el
  ledger-report.el
  ledger-schedule.el
  ledger-sort.el
  ledger-state.el
  ledger-test.el
  ledger-texi.el
  ledger-xact.el)

# find emacs and complain if not found
find_program(EMACS_EXECUTABLE emacs)

macro(add_emacs_lisp_target el)
  configure_file(${el} ${CMAKE_CURRENT_BINARY_DIR}/${el})

  # add rule (i.e. command) how to generate the byte-compiled file
  add_custom_command(
    OUTPUT ${el}c
    COMMAND ${EMACS_EXECUTABLE}
            -L ${CMAKE_CURRENT_BINARY_DIR}
            -l ${CMAKE_CURRENT_BINARY_DIR}/ledger-regex.el
            -batch -f batch-byte-compile
             ${CMAKE_CURRENT_BINARY_DIR}/${el}
    DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${el}
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    COMMENT "Creating byte-compiled Emacs lisp ${CMAKE_CURRENT_BINARY_DIR}/${el}c")
endmacro(add_emacs_lisp_target el)

if (EMACS_EXECUTABLE)
  foreach(el ${EMACS_LISP_SOURCES})
    add_emacs_lisp_target(${el})
    list(APPEND EMACS_LISP_BINARIES ${CMAKE_CURRENT_BINARY_DIR}/${el}c)
  endforeach()

  add_custom_target(emacs_lisp_byte_compile ALL DEPENDS ${EMACS_LISP_BINARIES})

  # install the byte-compiled emacs-lisp sources
  install(FILES ${EMACS_LISP_SOURCES} ${EMACS_LISP_BINARIES}
    DESTINATION share/emacs/site-lisp/ledger-mode)
endif()

### CMakeLists.txt ends here