#!/usr/bin/env python
# encoding: utf-8
# Carlos Rafael Giani, 2007 (dv)
# Thomas Nagy, 2007-2010 (ita)

from waflib import Utils, Task, Errors
from waflib.TaskGen import taskgen_method, feature, extension
from waflib.Tools import d_scan, d_config
from waflib.Tools.ccroot import link_task, stlink_task

class d(Task.Task):
	"Compile a d file into an object file"
	color   = 'GREEN'
	run_str = '${D} ${DFLAGS} ${DINC_ST:INCPATHS} ${D_SRC_F:SRC} ${D_TGT_F:TGT}'
	scan    = d_scan.scan

class d_with_header(d):
	"Compile a d file and generate a header"
	run_str = '${D} ${DFLAGS} ${DINC_ST:INCPATHS} ${D_HDR_F:tgt.outputs[1].bldpath()} ${D_SRC_F:SRC} ${D_TGT_F:tgt.outputs[0].bldpath()}'

class d_header(Task.Task):
	"Compile d headers"
	color   = 'BLUE'
	run_str = '${D} ${D_HEADER} ${SRC}'

class dprogram(link_task):
	"Link object files into a d program"
	run_str = '${D_LINKER} ${LINKFLAGS} ${DLNK_SRC_F}${SRC} ${DLNK_TGT_F:TGT} ${RPATH_ST:RPATH} ${DSTLIB_MARKER} ${DSTLIBPATH_ST:STLIBPATH} ${DSTLIB_ST:STLIB} ${DSHLIB_MARKER} ${DLIBPATH_ST:LIBPATH} ${DSHLIB_ST:LIB}'
	inst_to = '${BINDIR}'

class dshlib(dprogram):
	"Link object files into a d shared library"
	inst_to = '${LIBDIR}'

class dstlib(stlink_task):
	"Link object files into a d static library"
	pass # do not remove

@extension('.d', '.di', '.D')
def d_hook(self, node):
	"""
	Compile *D* files. To get .di files as well as .o files, set the following::

		def build(bld):
			bld.program(source='foo.d', target='app', generate_headers=True)

	"""
	ext = Utils.destos_to_binfmt(self.env.DEST_OS) == 'pe' and 'obj' or 'o'
	out = '%s.%d.%s' % (node.name, self.idx, ext)
	def create_compiled_task(self, name, node):
		task = self.create_task(name, node, node.parent.find_or_declare(out))
		try:
			self.compiled_tasks.append(task)
		except AttributeError:
			self.compiled_tasks = [task]
		return task

	if getattr(self, 'generate_headers', None):
		tsk = create_compiled_task(self, 'd_with_header', node)
		tsk.outputs.append(node.change_ext(self.env['DHEADER_ext']))
	else:
		tsk = create_compiled_task(self, 'd', node)
	return tsk

@taskgen_method
def generate_header(self, filename):
	"""
	See feature request #104::

		def build(bld):
			tg = bld.program(source='foo.d', target='app')
			tg.generate_header('blah.d')
			# is equivalent to:
			#tg = bld.program(source='foo.d', target='app', header_lst='blah.d')

	:param filename: header to create
	:type filename: string
	"""
	try:
		self.header_lst.append([filename, self.install_path])
	except AttributeError:
		self.header_lst = [[filename, self.install_path]]

@feature('d')
def process_header(self):
	"""
	Process the attribute 'header_lst' to create the d header compilation tasks::

		def build(bld):
			bld.program(source='foo.d', target='app', header_lst='blah.d')
	"""
	for i in getattr(self, 'header_lst', []):
		node = self.path.find_resource(i[0])
		if not node:
			raise Errors.WafError('file %r not found on d obj' % i[0])
		self.create_task('d_header', node, node.change_ext('.di'))

