set(SYN_VIM_GENERATOR ${PROJECT_SOURCE_DIR}/scripts/genvimvim.lua)
set(GENERATED_RUNTIME_DIR ${PROJECT_BINARY_DIR}/runtime)
set(GENERATED_SYN_VIM ${GENERATED_RUNTIME_DIR}/syntax/vim/generated.vim)
set(GENERATED_HELP_TAGS ${GENERATED_RUNTIME_DIR}/doc/tags)

file(MAKE_DIRECTORY ${GENERATED_RUNTIME_DIR})
file(MAKE_DIRECTORY ${GENERATED_RUNTIME_DIR}/syntax)
file(MAKE_DIRECTORY ${GENERATED_RUNTIME_DIR}/syntax/vim)

add_custom_command(OUTPUT ${GENERATED_SYN_VIM}
  COMMAND ${LUA_PRG} ${SYN_VIM_GENERATOR}
          ${PROJECT_SOURCE_DIR}/src/nvim ${GENERATED_SYN_VIM}
  DEPENDS
    ${SYN_VIM_GENERATOR}
    ${PROJECT_SOURCE_DIR}/src/nvim/ex_cmds.lua
    ${PROJECT_SOURCE_DIR}/src/nvim/auevents.lua
    ${PROJECT_SOURCE_DIR}/src/nvim/options.lua
    ${PROJECT_SOURCE_DIR}/src/nvim/eval.c
)

file(GLOB DOCFILES ${PROJECT_SOURCE_DIR}/runtime/doc/*.txt)

set(BUILDDOCFILES)
foreach(DF ${DOCFILES})
  get_filename_component(F ${DF} NAME)
  list(APPEND BUILDDOCFILES ${GENERATED_RUNTIME_DIR}/doc/${F})
endforeach()

add_custom_command(OUTPUT copy_docfiles
    COMMAND ${CMAKE_COMMAND} -E copy_directory
    ${PROJECT_SOURCE_DIR}/runtime/doc ${GENERATED_RUNTIME_DIR}/doc
)

add_custom_target(helptags
  COMMAND "${PROJECT_BINARY_DIR}/bin/nvim"
    -u NONE
    -i NONE
    -e
    --headless
    -c "helptags ++t ."
    -c quit
  DEPENDS
    copy_docfiles
    nvim
  WORKING_DIRECTORY "${GENERATED_RUNTIME_DIR}/doc"
)

add_custom_command(OUTPUT ${GENERATED_HELP_TAGS}
  DEPENDS
    helptags
)

add_custom_target(doc_html
  COMMAND make html
  DEPENDS
    ${GENERATED_HELP_TAGS}
  WORKING_DIRECTORY "${GENERATED_RUNTIME_DIR}/doc"
)

add_custom_target(
  runtime ALL
  DEPENDS
    ${GENERATED_SYN_VIM}
    ${GENERATED_HELP_TAGS}
)

# CMake is painful here.  It will create the destination using the user's
# current umask, and we don't want that.  And we don't just want to install
# the target directory, as it will mess with existing permissions.  So this
# seems like the best compromise.  If we create it, then everyone can see it.
# If it's preexisting, leave it alone.

install_helper(
  FILES ${GENERATED_HELP_TAGS} ${BUILDDOCFILES}
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/nvim/runtime/doc)

install_helper(
  FILES ${GENERATED_SYN_VIM}
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/nvim/runtime/syntax/vim)

file(GLOB_RECURSE RUNTIME_PROGRAMS
  RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
  *.awk *.sh *.bat)

foreach(PROG ${RUNTIME_PROGRAMS})
  get_filename_component(BASEDIR ${PROG} PATH)
  install_helper(PROGRAMS ${PROG}
                 DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/nvim/runtime/${BASEDIR})
endforeach()

file(GLOB_RECURSE RUNTIME_FILES
  RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
  *.vim *.dict *.py *.ps *.tutor)

foreach(F ${RUNTIME_FILES})
  get_filename_component(BASEDIR ${F} PATH)
  install_helper(FILES ${F}
                 DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/nvim/runtime/${BASEDIR})
endforeach()