#
# Conky, a system monitor, based on torsmo
#
# Please see COPYING for details
#
# Copyright (c) 2005-2019 Brenden Matthews, et. al. (see AUTHORS) All rights
# reserved.
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details. You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

include(FindPkgConfig)
include(CheckFunctionExists)
include(CheckIncludeFiles)
include(CheckSymbolExists)

# Check for some headers
check_include_files(sys/statfs.h HAVE_SYS_STATFS_H)
check_include_files(sys/param.h HAVE_SYS_PARAM_H)
check_include_files(sys/inotify.h HAVE_SYS_INOTIFY_H)
check_include_files(dirent.h HAVE_DIRENT_H)

# Check for some functions
check_function_exists(strndup HAVE_STRNDUP)

check_symbol_exists(pipe2 "unistd.h" HAVE_PIPE2)
check_symbol_exists(O_CLOEXEC "fcntl.h" HAVE_O_CLOEXEC)

if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  check_symbol_exists(statfs64 "sys/mount.h" HAVE_STATFS64)
else(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  check_symbol_exists(statfs64 "sys/statfs.h" HAVE_STATFS64)
endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")

ac_search_libs(clock_gettime "time.h" CLOCK_GETTIME_LIB "rt")
if(NOT DEFINED CLOCK_GETTIME_LIB)
  if(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin")
    message(FATAL_ERROR "clock_gettime not found.")
  endif(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin")
else(NOT DEFINED CLOCK_GETTIME_LIB)
  set(HAVE_CLOCK_GETTIME 1)
endif(NOT DEFINED CLOCK_GETTIME_LIB)
set(conky_libs ${conky_libs} ${CLOCK_GETTIME_LIB})

# standard path to search for includes
set(INCLUDE_SEARCH_PATH /usr/include /usr/local/include)

# Set system vars
if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  set(OS_LINUX true)
endif(CMAKE_SYSTEM_NAME MATCHES "Linux")

if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  set(OS_FREEBSD true)
  set(conky_libs ${conky_libs} -lkvm -ldevstat -lbsd)
endif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")

if(CMAKE_SYSTEM_NAME MATCHES "DragonFly")
  set(OS_DRAGONFLY true)
  set(conky_libs ${conky_libs} -ldevstat)
endif(CMAKE_SYSTEM_NAME MATCHES "DragonFly")

if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
  set(OS_OPENBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")

if(CMAKE_SYSTEM_NAME MATCHES "SunOS")
  set(OS_SOLARIS true)
  set(conky_libs ${conky_libs} -lkstat)
endif(CMAKE_SYSTEM_NAME MATCHES "SunOS")

if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
  set(OS_NETBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "NetBSD")

if(CMAKE_SYSTEM_NAME MATCHES "Haiku")
  set(OS_HAIKU true)
  set(conky_libs ${conky_libs} -lnetwork -lintl)
endif(CMAKE_SYSTEM_NAME MATCHES "Haiku")

if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  set(OS_DARWIN true)
endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")

if(NOT OS_LINUX
   AND NOT OS_FREEBSD
   AND NOT OS_OPENBSD
   AND NOT OS_DRAGONFLY
   AND NOT OS_SOLARIS
   AND NOT OS_HAIKU
   AND NOT OS_DARWIN)
  message(
    FATAL_ERROR
      "Your platform, '${CMAKE_SYSTEM_NAME}', is not currently supported.  Patches are welcome."
    )
endif(NOT
      OS_LINUX
      AND
      NOT
      OS_FREEBSD
      AND
      NOT
      OS_OPENBSD
      AND
      NOT
      OS_DRAGONFLY
      AND
      NOT
      OS_SOLARIS
      AND
      NOT
      OS_HAIKU
      AND
      NOT
      OS_DARWIN)

# Check for soundcard header
if(OS_LINUX)
  check_include_files("linux/soundcard.h" HAVE_SOME_SOUNDCARD_H)
  check_include_files("linux/soundcard.h" HAVE_LINUX_SOUNDCARD_H)
elseif(OS_OPENBSD)
  check_include_files("soundcard.h" HAVE_SOME_SOUNDCARD_H)
else(OS_LINUX)
  check_include_files("sys/soundcard.h" HAVE_SOME_SOUNDCARD_H)
endif(OS_LINUX)

if(BUILD_I18N AND OS_DRAGONFLY)
  set(conky_libs ${conky_libs} -lintl)
endif(BUILD_I18N AND OS_DRAGONFLY)

if(BUILD_I18N AND OS_DARWIN)
  find_path(LIBINTL_H_N libintl.h
            PATHS /usr/local/opt/gettext/include
                  /usr/include
                  /usr/local/include
                  /usr/local/opt/include)
  if(LIBINTL_H_N)
    include_directories(${LIBINTL_H_N})
  else(LIBINTL_H_N)
    message(FATAL_ERROR "Unable to find libintl.h (try `brew install gettext`)")
  endif(LIBINTL_H_N)
  find_library(INTL_LIB
               NAMES intl
               PATHS /usr/local/opt/gettext/lib
                     /usr/lib
                     /usr/local/lib
                     /usr/local/opt/lib)
  set(conky_libs ${conky_libs} ${INTL_LIB})
endif(BUILD_I18N AND OS_DARWIN)

if(BUILD_NCURSES AND OS_DARWIN)
  set(conky_libs ${conky_libs} -lncurses)
endif(BUILD_NCURSES AND OS_DARWIN)

if(BUILD_WLAN AND OS_DARWIN)
  find_library(CW CoreWLAN)
  find_library(NS Foundation)
  set(conky_libs ${conky_libs} ${CW})
  set(conky_libs ${conky_libs} ${NS})
endif(BUILD_WLAN AND OS_DARWIN)

if(OS_DARWIN AND BUILD_IPGFREQ)
  find_library(IPG IntelPowerGadget)
  set(conky_libs ${conky_libs} ${IPG})
endif(OS_DARWIN AND BUILD_IPGFREQ)

if(BUILD_MATH)
  set(conky_libs ${conky_libs} -lm)
endif(BUILD_MATH)

if(BUILD_ICAL)
  check_include_files(libical/ical.h ICAL_H_)
  if(NOT ICAL_H_)
    message(FATAL_ERROR "Unable to find libical")
  endif(NOT ICAL_H_)
  set(conky_libs ${conky_libs} -lical)
endif(BUILD_ICAL)

if(BUILD_IRC)
  find_path(IRC_H_N libircclient.h PATHS /usr/include/libircclient)
  find_path(IRC_H_S libircclient.h PATHS /usr/include)
  if(IRC_H_N)
    include_directories(${IRC_H_N})
  endif(IRC_H_N)
  if(IRC_H_N OR IRC_H_S)
    set(IRC_H_ true)
  else()
    message(FATAL_ERROR "Unable to find libircclient")
  endif(IRC_H_N OR IRC_H_S)
  set(conky_libs ${conky_libs} -lircclient)
endif(BUILD_IRC)

if(BUILD_IPV6)
  find_file(IF_INET6 if_inet6 PATHS /proc/net)
  if(NOT IF_INET6)
    message(WARNING "/proc/net/if_inet6 unavailable")
  endif(NOT IF_INET6)
endif(BUILD_IPV6)

if(BUILD_HTTP)
  pkg_check_modules(MICROHTTPD REQUIRED libmicrohttpd>=0.9.25)
  set(conky_libs ${conky_libs} ${MICROHTTPD_LIBRARIES})
  set(conky_includes ${conky_includes} ${MICROHTTPD_INCLUDE_DIRS})
endif(BUILD_HTTP)

if(BUILD_NCURSES)
  include(FindCurses)
  if(NOT CURSES_FOUND)
    message(FATAL_ERROR "Unable to find ncurses library")
  endif(NOT CURSES_FOUND)
  set(conky_libs ${conky_libs} ${CURSES_LIBRARIES})
  set(conky_includes ${conky_includes} ${CURSES_INCLUDE_DIR})
endif(BUILD_NCURSES)

if(BUILD_MYSQL)
  find_path(mysql_INCLUDE_PATH
            mysql.h
            ${INCLUDE_SEARCH_PATH}
            /usr/include/mysql
            /usr/local/include/mysql)
  if(NOT mysql_INCLUDE_PATH)
    message(FATAL_ERROR "Unable to find mysql.h")
  endif(NOT mysql_INCLUDE_PATH)
  set(conky_includes ${conky_includes} ${mysql_INCLUDE_PATH})
  find_library(MYSQLCLIENT_LIB
               NAMES mysqlclient
               PATHS /usr/lib
                     /usr/lib64
                     /usr/lib/mysql
                     /usr/lib64/mysql
                     /usr/local/lib
                     /usr/local/lib64
                     /usr/local/lib/mysql
                     /usr/local/lib64/mysql)
  if(NOT MYSQLCLIENT_LIB)
    message(FATAL_ERROR "Unable to find mysqlclient library")
  endif(NOT MYSQLCLIENT_LIB)
  set(conky_libs ${conky_libs} ${MYSQLCLIENT_LIB})
endif(BUILD_MYSQL)

if(BUILD_WLAN AND OS_LINUX)
  set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
  check_include_files(iwlib.h IWLIB_H)
  if(NOT IWLIB_H)
    message(FATAL_ERROR "Unable to find iwlib.h")
  endif(NOT IWLIB_H)
  find_library(IWLIB_LIB NAMES iw)
  if(NOT IWLIB_LIB)
    message(FATAL_ERROR "Unable to find libiw.so")
  endif(NOT IWLIB_LIB)
  set(conky_libs ${conky_libs} ${IWLIB_LIB})
  check_function_exists(iw_sockets_open IWLIB_SOCKETS_OPEN_FUNC)
endif(BUILD_WLAN AND OS_LINUX)

if(BUILD_PORT_MONITORS)
  check_function_exists(getnameinfo HAVE_GETNAMEINFO)
  if(NOT HAVE_GETNAMEINFO)
    message(FATAL_ERROR "could not find getnameinfo()")
  endif(NOT HAVE_GETNAMEINFO)
  check_include_files(
    "netdb.h;netinet/in.h;netinet/tcp.h;sys/socket.h;arpa/inet.h"
    HAVE_PORTMON_HEADERS)
  if(NOT HAVE_PORTMON_HEADERS)
    message(FATAL_ERROR "missing needed network header(s) for port monitoring")
  endif(NOT HAVE_PORTMON_HEADERS)
endif(BUILD_PORT_MONITORS)

# Check for iconv
if(BUILD_ICONV)
  check_include_files(iconv.h HAVE_ICONV_H)
  find_library(ICONV_LIBRARY NAMES iconv)
  if(NOT ICONV_LIBRARY)
    # maybe iconv() is provided by libc
    set(ICONV_LIBRARY ""
        CACHE FILEPATH
              "Path to the iconv library, if iconv is not provided by libc"
        FORCE)
  endif(NOT ICONV_LIBRARY)
  set(CMAKE_REQUIRED_LIBRARIES ${ICONV_LIBRARY})
  check_function_exists(iconv ICONV_FUNC)
  if(HAVE_ICONV_H AND ICONV_FUNC)
    set(conky_includes ${conky_includes} ${ICONV_INCLUDE_DIR})
    set(conky_libs ${conky_libs} ${ICONV_LIBRARY})
  else(HAVE_ICONV_H AND ICONV_FUNC)
    message(FATAL_ERROR "Unable to find iconv library")
  endif(HAVE_ICONV_H AND ICONV_FUNC)
endif(BUILD_ICONV)

# check for Xlib
if(BUILD_X11)
  include(FindX11)
  find_package(X11)
  if(X11_FOUND)
    set(conky_includes ${conky_includes} ${X11_INCLUDE_DIR})
    set(conky_libs ${conky_libs} ${X11_LIBRARIES})

    # check for Xdamage
    if(BUILD_XDAMAGE)
      if(NOT X11_Xdamage_FOUND)
        message(FATAL_ERROR "Unable to find Xdamage library")
      endif(NOT X11_Xdamage_FOUND)
      if(NOT X11_Xfixes_FOUND)
        message(FATAL_ERROR "Unable to find Xfixes library")
      endif(NOT X11_Xfixes_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xdamage_LIB} ${X11_Xfixes_LIB})
    endif(BUILD_XDAMAGE)

    if(BUILD_XSHAPE)
      if(NOT X11_Xshape_FOUND)
        message(FATAL_ERROR "Unable to find Xshape library")
      endif(NOT X11_Xshape_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xshape_LIB})
    endif(BUILD_XSHAPE)

    # check for Xft
    if(BUILD_XFT)
      find_path(freetype_INCLUDE_PATH
                config/ftconfig.h
                ${INCLUDE_SEARCH_PATH}
                /usr/include/freetype2
                /usr/local/include/freetype2
                /usr/pkg/include/freetype2)
      if(freetype_INCLUDE_PATH)
        set(freetype_FOUND true)
        set(conky_includes ${conky_includes} ${freetype_INCLUDE_PATH})
      else(freetype_INCLUDE_PATH)
        find_path(freetype_INCLUDE_PATH
                  freetype/config/ftconfig.h
                  ${INCLUDE_SEARCH_PATH}
                  /usr/include/freetype2
                  /usr/local/include/freetype2
                  /usr/pkg/include/freetype2)
        if(freetype_INCLUDE_PATH)
          set(freetype_FOUND true)
          set(conky_includes ${conky_includes} ${freetype_INCLUDE_PATH})
        else(freetype_INCLUDE_PATH)
          message(FATAL_ERROR "Unable to find freetype library")
        endif(freetype_INCLUDE_PATH)
      endif(freetype_INCLUDE_PATH)
      if(NOT X11_Xft_FOUND)
        message(FATAL_ERROR "Unable to find Xft library")
      endif(NOT X11_Xft_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xft_LIB})
    endif(BUILD_XFT)

    # check for Xdbe
    if(BUILD_XDBE)
      if(NOT X11_Xext_FOUND)
        message(FATAL_ERROR "Unable to find Xext library (needed for Xdbe)")
      endif(NOT X11_Xext_FOUND)
      set(conky_libs ${conky_libs} ${X11_Xext_LIB})
    endif(BUILD_XDBE)
  else(X11_FOUND)
    message(FATAL_ERROR "Unable to find X11 library")
  endif(X11_FOUND)
endif(BUILD_X11)

# Otherwise, use the most recent Lua version
pkg_search_module(LUA
                  REQUIRED
                  lua>=5.3
                  lua5.3
                  lua-5.3
                  lua53
                  lua5.2
                  lua-5.2
                  lua52)
set(conky_libs ${conky_libs} ${LUA_LIBRARIES})
set(conky_includes ${conky_includes} ${LUA_INCLUDE_DIRS})
link_directories(${LUA_LIBRARY_DIRS})
include_directories(3rdparty/toluapp/include)

if(BUILD_X11)
  # Check for libraries used by Lua bindings
  if(BUILD_LUA_CAIRO)
    pkg_check_modules(CAIRO REQUIRED cairo cairo-xlib)
    set(luacairo_libs ${CAIRO_LIBRARIES} ${LUA_LIBRARIES})
    set(luacairo_includes ${CAIRO_INCLUDE_DIRS} ${LUA_INCLUDE_DIRS})
    find_program(APP_PATCH patch)
    if(NOT APP_PATCH)
      message(FATAL_ERROR "Unable to find program 'patch'")
    endif(NOT APP_PATCH)
  endif(BUILD_LUA_CAIRO)
  if(BUILD_LUA_IMLIB2)
    pkg_search_module(IMLIB2 REQUIRED imlib2 Imlib2)
    set(luaimlib2_libs ${IMLIB2_LIBS} ${IMLIB2_LDFLAGS} ${LUA_LIBRARIES})
    set(luaimlib2_includes
        ${IMLIB2_INCLUDE_DIRS}
        ${LUA_INCLUDE_DIRS}
        ${X11_INCLUDE_DIR})
  endif(BUILD_LUA_IMLIB2)
  if(BUILD_LUA_RSVG)
    pkg_check_modules(RSVG REQUIRED librsvg-2.0)
    set(luarsvg_libs ${RSVG_LIBRARIES} ${LUA_LIBRARIES})
    set(luarsvg_includes ${RSVG_INCLUDE_DIRS} ${LUA_INCLUDE_DIRS})
  endif(BUILD_LUA_RSVG)
endif(BUILD_X11)

if(BUILD_AUDACIOUS)
  set(WANT_GLIB true)
  pkg_check_modules(NEW_AUDACIOUS audacious>=1.4.0)
  if(NEW_AUDACIOUS_FOUND)
    pkg_check_modules(AUDACIOUS REQUIRED audclient>=1.4.0)
    pkg_check_modules(DBUS_GLIB REQUIRED dbus-glib-1)
  else(NEW_AUDACIOUS_FOUND)
    pkg_check_modules(AUDACIOUS REQUIRED audacious<1.4.0)
  endif(NEW_AUDACIOUS_FOUND)
  set(conky_libs ${conky_libs} ${AUDACIOUS_LIBRARIES} ${DBUS_GLIB_LIBRARIES})
  set(conky_includes
      ${conky_includes}
      ${AUDACIOUS_INCLUDE_DIRS}
      ${DBUS_GLIB_INCLUDE_DIRS})
endif(BUILD_AUDACIOUS)

if(BUILD_XMMS2)
  pkg_check_modules(XMMS2 REQUIRED xmms2-client>=0.6)
  set(conky_libs ${conky_libs} ${XMMS2_LIBRARIES})
  set(conky_includes ${conky_includes} ${XMMS2_INCLUDE_DIRS})
endif(BUILD_XMMS2)

if(BUILD_CURL)
  set(WANT_CURL true)
endif(BUILD_CURL)

if(BUILD_RSS)
  set(WANT_CURL true)
  set(WANT_LIBXML2 true)
endif(BUILD_RSS)

if(BUILD_WEATHER_METAR)
  set(WANT_CURL true)
  set(BUILD_WEATHER true)
endif(BUILD_WEATHER_METAR)

if(BUILD_NVIDIA)
  find_path(XNVCtrl_INCLUDE_PATH NVCtrl/NVCtrl.h ${INCLUDE_SEARCH_PATH})
  find_library(XNVCtrl_LIB NAMES XNVCtrl)
  if(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
    set(XNVCtrl_FOUND true)
    set(conky_libs ${conky_libs} ${XNVCtrl_LIB})
    set(conky_includes ${conky_includes} ${XNVCtrl_INCLUDE_PATH})
  else(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
    message(FATAL_ERROR "Unable to find XNVCtrl library")
  endif(XNVCtrl_INCLUDE_PATH AND XNVCtrl_LIB)
endif(BUILD_NVIDIA)

if(BUILD_IMLIB2)
  pkg_search_module(IMLIB2 REQUIRED imlib2 Imlib2)
  set(conky_libs ${conky_libs} ${IMLIB2_LIBS} ${IMLIB2_LDFLAGS})
  set(conky_includes ${conky_includes} ${IMLIB2_INCLUDE_DIRS})
endif(BUILD_IMLIB2)

if(BUILD_JOURNAL)
  pkg_search_module(SYSTEMD REQUIRED libsystemd libsystemd-journal)
  set(conky_libs ${conky_libs} ${SYSTEMD_LIB} ${SYSTEMD_LDFLAGS})
  set(conky_includes ${conky_includes} ${SYSTEMD_INCLUDE_DIRS})
endif(BUILD_JOURNAL)

if(BUILD_PULSEAUDIO)
  pkg_check_modules(PULSEAUDIO REQUIRED libpulse)
  set(conky_libs ${conky_libs} ${PULSEAUDIO_LIBRARIES})
  set(conky_includes ${conky_includes} ${PULSEAUDIO_INCLUDE_DIRS})
endif(BUILD_PULSEAUDIO)

# Common libraries
if(WANT_GLIB)
  pkg_check_modules(GLIB REQUIRED glib-2.0>=2.36)
  set(conky_libs ${conky_libs} ${GLIB_LIBRARIES})
  set(conky_includes ${conky_includes} ${GLIB_INCLUDE_DIRS})
endif(WANT_GLIB)

if(WANT_CURL)
  pkg_check_modules(CURL REQUIRED libcurl)
  set(conky_libs ${conky_libs} ${CURL_LIBRARIES})
  set(conky_includes ${conky_includes} ${CURL_INCLUDE_DIRS})
endif(WANT_CURL)

if(WANT_LIBXML2)
  include(FindLibXml2)
  if(NOT LIBXML2_FOUND)
    message(FATAL_ERROR "Unable to find libxml2 library")
  endif(NOT LIBXML2_FOUND)
  set(conky_libs ${conky_libs} ${LIBXML2_LIBRARIES})
  set(conky_includes ${conky_includes} ${LIBXML2_INCLUDE_DIR})
endif(WANT_LIBXML2)

# Look for doc generation programs
if(MAINTAINER_MODE)
  # Used for doc generation
  find_program(APP_DB2X_XSLTPROC db2x_xsltproc)
  if(NOT APP_DB2X_XSLTPROC)
    message(FATAL_ERROR "Unable to find program 'db2x_xsltproc'")
  endif(NOT APP_DB2X_XSLTPROC)
  find_program(APP_DB2X_MANXML db2x_manxml)
  if(NOT APP_DB2X_MANXML)
    message(FATAL_ERROR "Unable to find program 'db2x_manxml'")
  endif(NOT APP_DB2X_MANXML)
  find_program(APP_XSLTPROC xsltproc)
  if(NOT APP_XSLTPROC)
    message(FATAL_ERROR "Unable to find program 'xsltproc'")
  endif(NOT APP_XSLTPROC)
  find_program(APP_MAN man)
  if(NOT APP_MAN)
    message(FATAL_ERROR "Unable to find program 'man'")
  endif(NOT APP_MAN)
  find_program(APP_LESS less)
  if(NOT APP_LESS)
    message(FATAL_ERROR "Unable to find program 'less'")
  endif(NOT APP_LESS)
  find_program(APP_SED sed)
  if(NOT APP_SED)
    message(FATAL_ERROR "Unable to find program 'sed'")
  endif(NOT APP_SED)
  mark_as_advanced(APP_DB2X_XSLTPROC
                   APP_DB2X_MANXML
                   APP_XSLTPROC
                   APP_MAN
                   APP_SED
                   APP_LESS)
endif(MAINTAINER_MODE)

if(CMAKE_BUILD_TYPE MATCHES "Debug")
  set(DEBUG true)
endif(CMAKE_BUILD_TYPE MATCHES "Debug")

# The version numbers are simply derived from the date and number of commits
# since start of month
if(DEBUG)
  execute_process(COMMAND ${APP_GIT} --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git
                          log --since=${VERSION_MAJOR}-${VERSION_MINOR}-01
                          --pretty=oneline
                  COMMAND ${APP_WC} -l
                  COMMAND ${APP_AWK} "{print $1}"
                  RESULT_VARIABLE RETVAL
                  OUTPUT_VARIABLE COMMIT_COUNT
                  OUTPUT_STRIP_TRAILING_WHITESPACE)
endif(DEBUG)