# MIT License
#
# Copyright The SCons Foundation
#
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# a copy of this software and associated documentation files (the
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# The above copyright notice and this permission notice shall be included
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

"""SCons.Tool.dmd

Tool-specific initialization for the Digital Mars D compiler.
(https://digitalmars.com/d)

Originally coded by Andy Friesen (andy@ikagames.com)
15 November 2003

Evolved by Russel Winder (russel@winder.org.uk)
2010-02-07 onwards

Compiler variables:

DC
  The name of the D compiler to use.
  Defaults to dmd or gdmd, whichever is found.

DPATH
  List of paths to search for import modules.

DVERSIONS
  List of version tags to enable when compiling.

DDEBUG
  List of debug tags to enable when compiling.

Linker related variables:

LIBS
  List of library files to link in.

DLINK
  Name of the linker to use.
  Defaults to dmd or gdmd, whichever is found.

DLINKFLAGS
  List of linker flags.

Lib tool variables:

DLIB
  Name of the lib tool to use.  Defaults to lib.

DLIBFLAGS
  List of flags to pass to the lib tool.

LIBS
  Same as for the linker. (libraries to pull into the .lib)

"""


import SCons.Action
import SCons.Builder
import SCons.Defaults
import SCons.Scanner.D
import SCons.Tool

import SCons.Tool.DCommon as DCommon


def generate(env) -> None:
    static_obj, shared_obj = SCons.Tool.createObjBuilders(env)

    static_obj.add_action('.d', SCons.Defaults.DAction)
    shared_obj.add_action('.d', SCons.Defaults.ShDAction)
    static_obj.add_emitter('.d', DCommon.DStaticObjectEmitter)
    shared_obj.add_emitter('.d', DCommon.DSharedObjectEmitter)

    env['DC'] = env.Detect(['dmd', 'ldmd2', 'gdmd']) or 'dmd'
    env['DCOM'] = '$DC $_DINCFLAGS $_DVERFLAGS $_DDEBUGFLAGS $_DFLAGS $_DI_FLAGS -c -of$TARGET $SOURCES'
    env['_DINCFLAGS'] = '${_concat(DINCPREFIX, DPATH, DINCSUFFIX, __env__, RDirs, TARGET, SOURCE)}'
    env['_DVERFLAGS'] = '${_concat(DVERPREFIX, DVERSIONS, DVERSUFFIX, __env__)}'
    env['_DDEBUGFLAGS'] = '${_concat(DDEBUGPREFIX, DDEBUG, DDEBUGSUFFIX, __env__)}'

    env['_DI_FLAGS'] = "${DI_FILE_DIR and DI_FILE_DIR_PREFIX+DI_FILE_DIR+DI_FILE_DIR_SUFFFIX}"

    env['_DFLAGS'] = '${_concat(DFLAGPREFIX, DFLAGS, DFLAGSUFFIX, __env__)}'

    env['SHDC'] = '$DC'
    env['SHDCOM'] = '$DC $_DINCFLAGS $_DVERFLAGS $_DDEBUGFLAGS $_DFLAGS $_DI_FLAGS -c -fPIC -of$TARGET $SOURCES'

    env['DPATH'] = ['#/']
    env['DFLAGS'] = []
    env['DVERSIONS'] = []
    env['DDEBUG'] = []

    if env['DC']:
        DCommon.addDPATHToEnv(env, env['DC'])

    env['DINCPREFIX'] = '-I'
    env['DINCSUFFIX'] = ''
    env['DVERPREFIX'] = '-version='
    env['DVERSUFFIX'] = ''
    env['DDEBUGPREFIX'] = '-debug='
    env['DDEBUGSUFFIX'] = ''
    env['DFLAGPREFIX'] = '-'
    env['DFLAGSUFFIX'] = ''
    env['DFILESUFFIX'] = '.d'

    env['DI_FILE_DIR'] = ''
    env['DI_FILE_SUFFIX'] = '.di'

    env['DI_FILE_DIR_PREFIX'] = '-Hd='
    env['DI_FILE_DIR_SUFFFIX'] = ''

    env['DLINK'] = '$DC'
    env['DLINKFLAGS'] = SCons.Util.CLVar('')
    env['DLINKCOM'] = '$DLINK -of$TARGET $DLINKFLAGS $__DRPATH $SOURCES $_DLIBDIRFLAGS $_DLIBFLAGS'

    env['SHDLINK'] = '$DC'
    env['SHDLINKFLAGS'] = SCons.Util.CLVar('$DLINKFLAGS -shared -defaultlib=libphobos2.so')
    env[
        'SHDLINKCOM'] = '$DLINK -of$TARGET $SHDLINKFLAGS $__SHDLIBVERSIONFLAGS $__DRPATH $SOURCES $_DLIBDIRFLAGS $_DLIBFLAGS'

    env['DLIBLINKPREFIX'] = '' if env['PLATFORM'] == 'win32' else '-L-l'
    env['DLIBLINKSUFFIX'] = '.lib' if env['PLATFORM'] == 'win32' else ''
    env['_DLIBFLAGS'] = '${_stripixes(DLIBLINKPREFIX, LIBS, DLIBLINKSUFFIX, LIBPREFIXES, LIBSUFFIXES,  __env__, LIBLITERALPREFIX)}'

    env['DLIBDIRPREFIX'] = '-L-L'
    env['DLIBDIRSUFFIX'] = ''
    env['_DLIBDIRFLAGS'] = '${_concat(DLIBDIRPREFIX, LIBPATH, DLIBDIRSUFFIX, __env__, RDirs, TARGET, SOURCE)}'

    env['DLIB'] = 'lib' if env['PLATFORM'] == 'win32' else 'ar cr'
    env['DLIBCOM'] = '$DLIB $_DLIBFLAGS {}$TARGET $SOURCES $_DLIBFLAGS'.format(
        '-c ' if env['PLATFORM'] == 'win32' else '')

    # env['_DLIBFLAGS'] = '${_concat(DLIBFLAGPREFIX, DLIBFLAGS, DLIBFLAGSUFFIX, __env__)}'

    env['DLIBFLAGPREFIX'] = '-'
    env['DLIBFLAGSUFFIX'] = ''

    # __RPATH is set to $_RPATH in the platform specification if that
    # platform supports it.
    env['DRPATHPREFIX'] = '-L-rpath,' if env['PLATFORM'] == 'darwin' else '-L-rpath='
    env['DRPATHSUFFIX'] = ''
    env['_DRPATH'] = '${_concat(DRPATHPREFIX, RPATH, DRPATHSUFFIX, __env__)}'

    # Support for versioned libraries
    env['_SHDLIBVERSIONFLAGS'] = '$SHDLIBVERSIONFLAGS -L-soname=$_SHLIBSONAME'

    env['BUILDERS']['ProgramAllAtOnce'] = SCons.Builder.Builder(
        action='$DC $_DINCFLAGS $_DVERFLAGS $_DDEBUGFLAGS $_DFLAGS -of$TARGET $DLINKFLAGS $__DRPATH $SOURCES $_DLIBDIRFLAGS $_DLIBFLAGS',
        emitter=DCommon.allAtOnceEmitter,
    )


def exists(env):
    return env.Detect(['dmd', 'ldmd2', 'gdmd'])

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