#
# 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: 
# raptor_make module
# This module contains the classes that write and call Makefile wrappers.
#

import hashlib
import os
import random
import raptor
import raptor_data
import raptor_utilities
import raptor_version
import re
import subprocess
import time
from raptor_makefile import *

# raptor_make module classes

class MakeEngine(object):

	def __init__(self, Raptor):
		self.raptor = Raptor
		self.valid = True
		self.makefileset = None
		self.descrambler = None
		self.descrambler_started = False

		engine = Raptor.makeEngine
		
		# look for an alias first as this gives end-users a chance to modify
		# the shipped variant rather than completely replacing it.
		if engine in Raptor.cache.aliases:
			avar = Raptor.cache.FindNamedAlias(engine)
		elif engine in Raptor.cache.variants:
			avar = Raptor.cache.FindNamedVariant(engine)
		else:
			Raptor.Error("No settings found for build engine '%s'", engine)
			return
					
		# find the variant and extract the values
		try:
			units = avar.GenerateBuildUnits()
			evaluator = Raptor.GetEvaluator( None, units[0] , gathertools=True)

			# shell
			self.shellpath = evaluator.Get("DEFAULT_SHELL")
			usetalon_s = evaluator.Get("USE_TALON") 
			self.usetalon = usetalon_s is not None and usetalon_s != ""
			self.talonshell = str(evaluator.Get("TALON_SHELL"))
			self.talontimeout = str(evaluator.Get("TALON_TIMEOUT"))
			self.talonretries = str(evaluator.Get("TALON_RETRIES"))

			# commands
			self.initCommand = evaluator.Get("initialise")
			self.buildCommand = evaluator.Get("build")
			self.shutdownCommand = evaluator.Get("shutdown")

			# options
			self.makefileOption = evaluator.Get("makefile")
			self.keepGoingOption = evaluator.Get("keep_going")
			self.jobsOption = evaluator.Get("jobs")
			self.defaultMakeOptions = evaluator.Get("defaultoptions")

			# buffering
			self.scrambled = (evaluator.Get("scrambled") == "true")

			# check tool versions
			Raptor.CheckToolset(evaluator, avar.name)
			
			# default targets (can vary per-invocation)
			self.defaultTargets = Raptor.defaultTargets

			# work out how to split up makefiles
			try:
				selectorNames = [ x.strip() for x in evaluator.Get("selectors").split(',') if x.strip() != "" ]
				self.selectors = []


				if len(selectorNames) > 0:
					for name in selectorNames:
						pattern = evaluator.Get(name.strip() + ".selector.iface")
						target = evaluator.Get(name.strip() + ".selector.target")
						ignoretargets = evaluator.Get(name.strip() + ".selector.ignoretargets")
						self.selectors.append(MakefileSelector(name,pattern,target,ignoretargets))
			except KeyError:
				Raptor.Error("%s.selector.iface, %s.selector.target not found in make engine configuration", name, name)
				self.selectors = []

		except KeyError:
			Raptor.Error("Bad '%s' configuration found.", engine)
			self.valid = False
			return

		# there must at least be a build command...
		if not self.buildCommand:
				Raptor.Error("No build command for '%s'", engine)
				self.valid = False


		if self.usetalon:
			talon_settings="""
TALON_SHELL:=%s
TALON_TIMEOUT:=%s
TALON_RECIPEATTRIBUTES:=\
 name='$$RECIPE'\
 target='$$TARGET'\
 host='$$HOSTNAME'\
 layer='$$COMPONENT_LAYER'\
 component='$$COMPONENT_NAME'\
 bldinf='$$COMPONENT_META' mmp='$$PROJECT_META'\
 config='$$SBS_CONFIGURATION' platform='$$PLATFORM'\
 phase='$$MAKEFILE_GROUP' source='$$SOURCE
export TALON_RECIPEATTRIBUTES TALON_SHELL TALON_TIMEOUT
USE_TALON:=%s

""" % (self.talonshell, self.talontimeout, "1")
		else:
			talon_settings="""
USE_TALON:=

"""
		

		self.makefile_prologue = """
# generated by %s %s

HOSTPLATFORM:=%s
HOSTPLATFORM_DIR:=%s
OSTYPE:=%s
FLMHOME:=%s
SHELL:=%s

%s

include %s

""" 		% (  raptor.name, raptor_version.Version(),
			 " ".join(raptor.hostplatform),
			 raptor.hostplatform_dir,
			 self.raptor.filesystem,
			 str(self.raptor.systemFLM),
			 self.shellpath,
			 talon_settings,
			 self.raptor.systemFLM.Append('globals.mk') )


		self.makefile_epilogue = """

include %s

""" 			% (self.raptor.systemFLM.Append('final.mk') )

	def Write(self, toplevel, specs, configs):
		"""Generate a set of makefiles, or one big Makefile."""

		if not self.valid:
			return

		self.toplevel = toplevel

		# create the top-level makefiles

		try:
			self.makefileset = MakefileSet(directory = str(toplevel.Dir()),
										   selectors = self.selectors,
										   filenamebase = str(toplevel.File()),
										   prologue = self.makefile_prologue,
										   epilogue = self.makefile_epilogue,
										   defaulttargets = self.defaultTargets)

			# are we pruning duplicates?
			self.prune = self.raptor.pruneDuplicateMakefiles
			self.hashes = set()

			# are we writing one Makefile or lots?
			self.many = not self.raptor.writeSingleMakefile

			# add a makefile for each spec under each config
			config_makefileset = self.makefileset

			for c in configs:
				if self.many:
					config_makefileset = self.makefileset.createChild(c.name)

				# make sure the config_wide spec item is put out first so that it
				# can affect everything.
				ordered_specs=[]
				config_wide_spec = None
				for s in specs:
					if s.name == "config_wide":
						config_wide_spec = s
					else:
						ordered_specs.append(s)

				if config_wide_spec is not None:
					config_wide_spec.Configure(c)
					self.WriteConfiguredSpec(config_makefileset, config_wide_spec, c, True)

				for s in ordered_specs:
					s.Configure(c)
					self.WriteConfiguredSpec(config_makefileset, s, c, False)

			self.makefileset.close()
		except Exception,e:
			self.raptor.Error("Failed to write makefile '%s': %s" % (str(toplevel),str(e)))


	def WriteConfiguredSpec(self, parentMakefileSet, spec, config, useAllInterfaces):
		# ignore this spec if it is empty
		hasInterface = spec.HasInterface()
		childSpecs = spec.GetChildSpecs()

		if not hasInterface and not childSpecs:
			return

		parameters = []
		dupe = True
		iface = None
		guard = None
		if hasInterface:
			# find the Interface (it may be a ref)
			iface = spec.GetInterface()

			if iface == None:
				self.raptor.Error("No interface for '%s'", spec.name)
				return

			if iface.abstract:
				self.raptor.Error("Abstract interface '%s' for '%s'",
								  iface.name, spec.name)
				return

			# we need to guard the FLM call with a hash based on all the
			# parameter values so that duplicate calls cannot be made.
			# So we need to find all the values before we can write
			# anything out.
			md5hash = hashlib.md5()
			md5hash.update(iface.name)

			# we need an Evaluator to get parameter values for this
			# Specification in the context of this Configuration
			evaluator = self.raptor.GetEvaluator(spec, config)

			def addparam(k, value, default):
				if value == None:
					if p.default != None:
						value = p.default
					else:
						self.raptor.Error("%s undefined for '%s'",
										  k, spec.name)
						value = ""

				parameters.append((k, value))
				md5hash.update(value)

			# parameters required by the interface
			for p in iface.GetParams():
				val = evaluator.Resolve(p.name)
				addparam(p.name,val,p.default)

			# Use Patterns to fetch a group of parameters
			for g in iface.GetParamGroups():
				for k,v in evaluator.ResolveMatching(g.patternre):
					addparam(k,v,g.default)

			hash = md5hash.hexdigest()
			dupe = hash in self.hashes

			self.hashes.add(hash)

		# we only create a Makefile if we have a new FLM call to contribute,
		# OR we are not pruning duplicates (guarding instead)
		# OR we have some child specs that need something to include them.
		if dupe and self.prune and not childSpecs:
			return

		makefileset = parentMakefileSet
		# Create a new layer of makefiles?
		if self.many:
			makefileset = makefileset.createChild(spec.name)

		if not (self.prune and dupe):
			if self.prune:
				guard = ""
			else:
				guard = "guard_" + hash

		# generate the call to the FLM
		if iface is not None:
			makefileset.addCall(spec.name, config.name, iface.name, useAllInterfaces, iface.GetFLMIncludePath(), parameters, guard)

		# recursive includes

		for child in childSpecs:
			self.WriteConfiguredSpec(makefileset, child, config, useAllInterfaces)

		if self.many:
			makefileset.close() # close child set of makefiles as we'll never see them again.

	def Make(self, makefileset):
		"run the make command"

		if not self.valid:
			return False
	
		if self.usetalon:
			# Always use Talon since it does the XML not
			# just descrambling
			if not self.StartTalon() and not self.raptor.keepGoing:
				self.Tidy()
				return False
		else:
			# use the descrambler if we are doing a parallel build on
			# a make engine which does not buffer each agent's output
			if self.raptor.jobs > 1 and self.scrambled:
				self.StartDescrambler()
				if  not self.descrambler_started and not self.raptor.keepGoing:
					self.Tidy()
					return False
			
		# run any initialisation script
		if self.initCommand:
			self.raptor.Info("Running %s", self.initCommand)
			if os.system(self.initCommand) != 0:
				self.raptor.Error("Failed in %s", self.initCommand)
				self.Tidy()
				return False

		# Save file names to a list, to allow the order to be reversed
		fileName_list = list(self.makefileset.makefileNames())

		# Iterate through args passed to raptor, searching for CLEAN or REALLYCLEAN
		clean_flag = False
		for arg in self.raptor.args:
			clean_flag = ("CLEAN" in self.raptor.args) or \
			            ("REALLYCLEAN" in self.raptor.args)

		# Files should be deleted in the opposite order to the order
		# they were built. So reverse file order if cleaning
		if clean_flag:
			fileName_list.reverse()

		# Process each file in turn
		for makefile in fileName_list:
			if not os.path.exists(makefile):
				self.raptor.Info("Skipping makefile %s", makefile)
				continue
			self.raptor.Info("Making %s", makefile)
			# assemble the build command line
			command = self.buildCommand

			if self.makefileOption:
				command += " " + self.makefileOption + " " + '"' + str(makefile) + '"'

			if self.raptor.keepGoing and self.keepGoingOption:
				command += " " + self.keepGoingOption

			if self.raptor.jobs > 1 and self.jobsOption:
				command += " " + self.jobsOption +" "+ str(self.raptor.jobs)

			# Set default options first so that they can be overridden by
			# ones set by the --mo option on the raptor commandline:
			command += " " + self.defaultMakeOptions
			# Can supply options on the commandline to override default settings.
			if len(self.raptor.makeOptions) > 0:
				command += " " + " ".join(self.raptor.makeOptions)

			# Switch off dependency file including?
			if self.raptor.noDependInclude:
				command += " NO_DEPEND_INCLUDE=1"
			
			if self.usetalon:
				# use the descrambler if we set it up
				command += ' TALON_DESCRAMBLE=' 
				if self.scrambled:
					command += '1 '
				else:
					command += '0 '
			else:
				if self.descrambler_started:
					command += ' DESCRAMBLE="' + self.descrambler + '"'
			
			# use the retry mechanism if requested
			if self.raptor.tries > 1:
				command += ' RECIPETRIES=' + str(self.raptor.tries)
				command += ' TALON_RETRIES=' + str(self.raptor.tries - 1)

			# targets go at the end, if the makefile supports them
			addTargets = self.raptor.targets[:]
			ignoreTargets = self.makefileset.ignoreTargets(makefile)
			if addTargets and ignoreTargets:
				for target in self.raptor.targets:
					if re.match(ignoreTargets, target):
						addTargets.remove(target)

			if addTargets:
				command += " " + " ".join(addTargets)

			self.raptor.Info("Executing '%s'", command)

			# execute the build.
			# the actual call differs between Windows and Unix.
			# bufsize=1 means "line buffered"
			#
			try:
				makeenv=os.environ.copy()
				if self.usetalon:
					makeenv['TALON_RECIPEATTRIBUTES']="none"
					makeenv['TALON_SHELL']=self.talonshell
					makeenv['TALON_BUILDID']=str(self.buildID)
					makeenv['TALON_TIMEOUT']=str(self.talontimeout)
				if self.raptor.filesystem == "unix":
					p = subprocess.Popen(command, bufsize=65535,
									     stdout=subprocess.PIPE,
									     stderr=subprocess.STDOUT,
									     close_fds=True, env=makeenv, shell=True)
				else:
					p = subprocess.Popen(command, bufsize=65535,
									     stdout=subprocess.PIPE,
									     stderr=subprocess.STDOUT,
									     universal_newlines=True, env=makeenv)
				stream = p.stdout


				line = " "
				while line:
					line = stream.readline()
					self.raptor.out.write(line)

				# should be done now
				returncode = p.wait()


				if returncode != 0  and not self.raptor.keepGoing:
					self.Tidy()
					return False

			except Exception,e:
				self.raptor.Error("Exception '%s' during '%s'", str(e), command)
				self.Tidy()
				return False

		# run any shutdown script
		if self.shutdownCommand != None and self.shutdownCommand != "":
			self.raptor.Info("Running %s", self.shutdownCommand)
			if os.system(self.shutdownCommand) != 0:
				self.raptor.Error("Failed in %s", self.shutdownCommand)
				self.Tidy()
				return False

		self.Tidy()
		return True

	def Tidy(self):
		if self.usetalon:
			self.StopTalon() 
		else:
			"clean up after the make command"
			self.StopDescrambler()

	def StartTalon(self):
		# the talon command
		beginning = raptor.hostplatform_dir + "/bin"
		if "win" in raptor.hostplatform:
			end = ".exe"
		else:
			end = ""
			
		self.talonctl = str(self.raptor.home.Append(beginning, "talonctl"+end))
			
		# generate a unique build number
		random.seed()
		looking = True
		tries = 0
		while looking and tries < 100:
			self.buildID = raptor.name + str(random.getrandbits(32))
			
			command = self.talonctl + " start"

			os.environ["TALON_BUILDID"] = self.buildID
			self.raptor.Info("Running %s", command)
			looking = (os.system(command) != 0)
			tries += 1
		if looking:
			self.raptor.Error("Failed to initilaise the talon shell for this build")
			self.talonctl = ""
			return False
		
		return True
	
	def StopTalon(self):
		if self.talonctl:
			command = self.talonctl + " stop"
			self.talonctl = ""
			
			self.raptor.Info("Running %s", command)
			if os.system(command) != 0:
				self.raptor.Error("Failed in %s", command)
				return False
			
		return True
	
	def StartDescrambler(self):
		# the descrambler command
		beginning = raptor.hostplatform_dir + "/bin"
		if "win" in raptor.hostplatform:
			end = ".exe"
		else:
			end = ""

		self.descrambler = str(self.raptor.home.Append(beginning, "sbs_descramble"+end))
			
		# generate a unique build number
		random.seed()
		looking = True
		tries = 0
		while looking and tries < 100:
			buildID = raptor.name + str(random.getrandbits(32))

			command = self.descrambler + " " + buildID + " start"
			self.raptor.Info("Running %s", command)
			looking = (os.system(command) != 0)
			tries += 1

		if looking:
			self.raptor.Error("Failed to start the log descrambler")
			self.descrambler_started = True
			return False

		self.descrambler_started = True
		self.descrambler +=	" " + buildID

		return  True

	def StopDescrambler(self):
		if self.descrambler_started:
			command = self.descrambler + " stop"
			self.descrambler = ""

			self.raptor.Info("Running %s", command)
			if os.system(command) != 0:
				self.raptor.Error("Failed in %s", command)
				return False
		return True

# raptor_make module functions


# end of the raptor_make module