#

# Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description: 

# makefile module

# This module is for writing calls to Function-Like Makefiles

#

import re

import os

import generic_path

class MakefileSelector(object):

	"""A "query" which is used to separate some flm interface calls

	  into separate makefile trees."""

	def __init__(self, name="default", interfacepattern=None, defaulttarget=None, ignoretargets=None):

		self.name=name

		if interfacepattern is not None:

			self.interfacepattern=re.compile(interfacepattern, re.I)

		else:

			self.interfacepattern=None

		self.defaulttarget=defaulttarget

		self.ignoretargets=ignoretargets

class Makefile(object):

	"""Representation of the file that is created from the build specification 

	   tree.

	"""

	def __init__(self, directory, selector, parent=None, filenamebase="Makefile", prologue=None, epilogue=None, defaulttargets=None):

		self.filenamebase = filenamebase

		self.directory = directory

		if selector.name != "":

			extension = "." + selector.name

		else:

			extension = ""

		self.filename = generic_path.Join(directory,filenamebase + extension)

		self.selector = selector

		self.parent = parent

		self.childlist = []

		self.file = None

		self.prologue = prologue

		self.epilogue = epilogue

		self.defaulttargets = defaulttargets

		self.dead = False

	def open(self):

		if self.dead:

			raise Exception, "Attempt to reopen completed makefile %s " % (self.filename)

		if self.file is None:

			directory = self.filename.Dir()

			if not (str(directory) == "" or directory.Exists()):

				try:

					os.makedirs(directory.GetLocalString())

				except Exception,e:

					raise Exception, "Cannot make directory '%s' for file '%s' in '%s': %s " % (str(directory),str(self.filename),str(self.directory),str(e))

			self.file = open(str(self.filename),"w+")

			self.file.write('# GENERATED MAKEFILE : DO NOT EDIT\n\n')

			if self.selector.defaulttarget:

				self.file.write('MAKEFILE_GROUP:=%s\n.PHONY:: %s\n%s:: # Default target\n' \

							% (self.selector.defaulttarget, self.selector.defaulttarget, self.selector.defaulttarget))

			else:

				self.file.write('MAKEFILE_GROUP:=DEFAULT\n')

			if self.prologue != None:

				self.file.write(self.prologue)

			if self.defaulttargets != None:

				self.file.write('# dynamic default targets\n')

				for defaulttarget in self.defaulttargets:

					self.file.write('.PHONY:: %s\n' % defaulttarget)

					self.file.write('%s:\n' % defaulttarget)

				self.file.write('\n')

	def addChild(self, child):

		self.open()

		self.file.write("include %s\n" % child.filename)

		child.open()

	def createChild(self, subdir):

		child = Makefile(str(self.filename.Dir().Append(subdir)), self.selector, self, self.filenamebase, self.prologue, self.epilogue, self.defaulttargets)

		self.addChild(child)

		child.open()

		return child

	def addCall(self, specname, configname, ifname, useAllInterfaces, flmpath, parameters, guard = None):

		"""Add an FLM call to the makefile.

			specname is the name of the build specification (e.g. the mmp name)

			configname is the name of the configuration which this call is made for

			flmpath is the absolute path to the flm

			parameters is an array of tuples, (paramname, paramvalue)	

			guard is a hash value that should be unique to the FLM call

		   This call will return False if the ifname does not match the selector for 

		   the makefile. e.g. it prevents one from adding a resource FLM call to a

		   makefile which is selecting export FLM calls. Selection is overridden if

		   useAllInterfaces is True.

		"""

		# create the directory if it does not exist

		if self.selector.interfacepattern is not None:

			ifmatch = self.selector.interfacepattern.search(ifname)

			if ifmatch == None and useAllInterfaces == False:

				return False

		self.open()

		# now we can write the values into the makefile

		self.file.write("# call %s\n" % flmpath)

		self.file.write("SBS_SPECIFICATION:=%s\n" % specname)

		self.file.write("SBS_CONFIGURATION:=%s\n\n" % configname)

		if guard:

			self.file.write("ifeq ($(%s),)\n%s:=1\n\n" % (guard, guard))

		for (p, value) in parameters:

			self.file.write("%s:=%s\n" % (p, value))

		self.file.write("include %s\n" % flmpath)

		self.file.write("MAKEFILE_LIST:= # work around potential gnu make stack overflow\n\n")

		if guard:

			self.file.write("endif\n\n")

		return True

	def close(self):

		if self.file is not None:

			if self.epilogue != None:

				self.file.write(self.epilogue)

			self.file.write('# END OF GENERATED MAKEFILE : DO NOT EDIT\n')

			self.file.close()

			self.file = None

			self.dead = True

	def __del__(self):

		self.close()

class MakefileSet(object):

	grouperselector = MakefileSelector(name="")

	defaultselectors = [ 

		MakefileSelector("export", '\.export$', "EXPORT"),

		MakefileSelector("bitmap", '\.bitmap$', "BITMAP"),

		MakefileSelector("resource", '\.resource$', "RESOURCE"),

		MakefileSelector("default", '\.(?!export$|bitmap$|resource$).*$', "ALL")

		]

	def __init__(self, directory, selectors=defaultselectors, makefiles=None, parent=None, filenamebase="Makefile", prologue=None, epilogue=None, defaulttargets=None):

		self.directory = generic_path.Path(directory)

		self.filenamebase = filenamebase

		self.parent = parent

		if makefiles is not None:

			self.makefiles = makefiles

		else:

			self.makefiles = []

			for sel in selectors:

				self.makefiles.append(Makefile(directory, sel, None, filenamebase, prologue, epilogue, defaulttargets))

		self.groupermakefile = Makefile(directory, MakefileSet.grouperselector, None, filenamebase, "# GROUPER MAKEFILE\n\nALL::\n\n", "\n")

		for mf in self.makefiles:

			self.groupermakefile.addChild(mf)

	def createChild(self, subdir):

		"""Create a set of "sub" makefiles that are included by this set."""

		newmakefiles = []

		for mf in self.makefiles:

			newmf = mf.createChild(subdir)

			newmakefiles.append(newmf)

		newset = MakefileSet(str(self.directory.Append(subdir)), None, newmakefiles, self, self.filenamebase)

		self.groupermakefile.addChild(newset.groupermakefile)

		return newset

	def addCall(self, specname, configname, ifname, useAllInterfaces, flmpath, parameters, guard = None):

		"""Find out which makefiles to write this FLM call to 

		   and write it to those (e.g. the exports makefile) """

		for f in self.makefiles:

			f.addCall(specname, configname, ifname, useAllInterfaces, flmpath, parameters, guard)

	def makefileNames(self):

		for mf in self.makefiles:

			yield str(mf.filename)

	def ignoreTargets(self, makefile):

		"""Get hold of a makefile's selector based on its name and

		   determine whether it ignores targets based on a regexp."""

		for mf in self.makefiles:

			filename = str(mf.filename)			

			if filename == makefile:

				return mf.selector.ignoretargets 

		return None

	def close(self):

		for mf in self.makefiles:

			mf.close()

		self.groupermakefile.close()

	def __del__(self):

		self.close()