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#!/bin/env python

# Written by Mattias Runge 2008-05-13

import os

import sys

import getopt

moddir = '../../module' # FIXME: This is ugly

localmoddir = 'modules' # FIXME: This is ugly

def getModules():

	modules = []

	for fileName in os.listdir(moddir):

		if fileName[0] != '.':

			modules.append(fileName)

	return modules

def getLocalModules():

	modules = []

	for fileName in os.listdir(localmoddir):

		if fileName[0] != '.':

			modules.append(fileName)

	return modules

def parseModuleIdFromFile(moduleName, fileName):

	config_inc = open(fileName, 'r') 

	config_inc_lines = config_inc.readlines()

	config_inc.close()

	for line in config_inc_lines:

		line = line.strip("\n").strip(" ")

		if line.find(moduleName + "_ID") != -1:

			parts = line.split("=")

			return parts[1].strip(" ")

	return -1;

def getFreeModuleId(moduleName):

	takenIds = []

	for applicationName in os.listdir("../"):

		if applicationName[0] != '.' and os.path.exists("../" + applicationName + "/config.inc"):

			takenId = parseModuleIdFromFile(moduleName, "../" + applicationName + "/config.inc")

			if takenId != -1 and takenId != "<ID>":

				takenIds.append(int(takenId, 16))

	if len(takenIds) == 0:

		return "0x01"

	takenIds.sort()

	lastId = 0

	for takenId in takenIds:

		if takenId != lastId+1:

			return hex(lastId+1)

		lastId = takenId

	return hex(lastId+1)

def compileMainFile():

	print "Compiling new main.c..."

	main_c_template = open('src/main.c.template', 'r') 

	main_c_template_lines = main_c_template.readlines()

	main_c_template.close()

	modules = getLocalModules()

	main_c = open('src/main.c', 'w') 

	for main_c_template_line in main_c_template_lines:

		pos_include = main_c_template_line.find('%INCLUDE')

		pos_init = main_c_template_line.find('%INIT')

		pos_process = main_c_template_line.find('%PROCESS')

		pos_list = main_c_template_line.find('%LIST')

		pos_handlemsg = main_c_template_line.find('%HANDLEMSG')

		if pos_include != -1:

			for moduleName in modules:

				main_c.write(main_c_template_line[:pos_include] + "#include \"../modules/" + moduleName + "/" + moduleName + ".h\"\n")

		elif pos_init != -1:

			for moduleName in modules:

				main_c.write(main_c_template_line[:pos_init] + moduleName + "_Init(\n")

		elif pos_process != -1:

			for moduleName in modules:

				main_c.write(main_c_template_line[:pos_process] + moduleName + "_Process(\n")

		elif pos_list != -1:

			count = 1

			for moduleName in modules:

				main_c.write(main_c_template_line[:pos_list] + moduleName + "_List(" + str(count) + "\n")

				count += 1

		elif pos_handlemsg != -1:

			for moduleName in modules:

				main_c.write(main_c_template_line[:pos_handlemsg] + moduleName + "_HandleMessage(&rxMsg\n")

		else:

			main_c.write(main_c_template_line)

	main_c.close()

	print "Creation of main.c complete"

def readConfigSection(fileName, sectionName):

	fileInstance = open(fileName, 'r')

	lines = fileInstance.readlines()

	fileInstance.close()

	sectionLines = []

	inSection = False

	for line in lines:

		if not inSection:

			if line.find("## Section " + sectionName) != -1:

				inSection = True

				sectionLines.append(line.strip("\n"))

		else:

			if line.find("## End section " + sectionName) != -1:

				inSection = False

			sectionLines.append(line.strip("\n"))

	return sectionLines

def updateConfigFile():

	print "Updating config.inc..."

	modules = getLocalModules()

	moduleSections = {}

	applicationSection = []

	if not os.path.exists("config.inc"):

		applicationSection = readConfigSection("src/config.inc.template", "application")

		for moduleName in modules:

			moduleSections[moduleName] = readConfigSection(localmoddir + "/" + moduleName + "/config.inc.template", moduleName)

	else:

		applicationSection = readConfigSection("config.inc", "application")

		for moduleName in modules:

			moduleSections[moduleName] = readConfigSection("config.inc", moduleName)

			if len(moduleSections[moduleName]) <= 1:

				moduleSections[moduleName] = readConfigSection(localmoddir + "/" + moduleName + "/config.inc.template", moduleName)

	timers = 0

	for moduleName, moduleSection in moduleSections.iteritems():

		c = 0

		for line in moduleSection:

			if line.find("<ID>") != -1:

				line = line.replace("<ID>", getFreeModuleId(moduleName))

			elif line.find("<TIMER>") != -1:

				line = line[:line.find("=")+1] + hex(timers) + " /* <TIMER> -- DO NOT REMOVE THIS COMMENT -- */"

				timers += 1

			moduleSection[c] = line;

			c += 1

	c = 0

	for line in applicationSection:

		if line.find("<TIMER>") != -1:

			line = line[:line.find("=")+1] + hex(timers) + " /* <TIMER> -- DO NOT REMOVE THIS COMMENT -- */"

			timers += 1

		elif line.find("TIMER_NUM_TIMERS=") != -1:

			line = "TIMER_NUM_TIMERS=" + hex(timers)

		elif line.find("NUMBER_OF_MODULES=") != -1:

			line = "NUMBER_OF_MODULES=" + hex(len(modules))

		applicationSection[c] = line;

		c += 1

	config_inc = open('config.inc', 'w')

	for line in applicationSection:

		config_inc.write(line + "\n")

	for moduleName, moduleSection in moduleSections.iteritems():

		for line in moduleSection:

			config_inc.write(line + "\n")

	config_inc.close()

	print "Update of config.inc complete"

def compileSourcesFile():

	print "Compiling sources.inc..."

	uniqueSet = []

	sources_list_template = open('src/sources.list.template', 'r')

	sources_list_template_lines = sources_list_template.readlines()

	sources_list_template.close()

	for sources_list_template_line in sources_list_template_lines:

		if len(sources_list_template_line) > 0:

			uniqueSet.append(sources_list_template_line.strip("\n"))

	modules = getLocalModules()

	for moduleName in modules:

		sources_list = open(localmoddir + "/" + moduleName + "/sources.list", 'r')

		sources_list_lines = sources_list.readlines()

		sources_list.close()

		for sources_list_line in sources_list_lines:

			if len(sources_list_line) > 0:

				uniqueSet.append(sources_list_line.strip("\n"))

	sourcesString = "SOURCES = "

	#FIXME: Make uniqueSet actually unique

	for line in uniqueSet:

		sourcesString += line + " "

	sources_inc = open('sources.inc', 'w')

	sources_inc.write(sourcesString.strip(" ") + "\n")

	sources_inc.close()

	print "Creation of sources.inc complete"

def regenerateModules():

	print "Regenerating modules..."

	print ""

	compileSourcesFile()

	print ""

	compileMainFile()

	print ""

	updateConfigFile()

	print ""

	print "Regenerating modules complete"

	print ""

def addModule(moduleName):

	print "Trying to add module " + moduleName

	try:

		os.symlink("../" + moddir + "/" + moduleName, localmoddir + "/" + moduleName)

		print "Added module successfully"

	except OSError, (errno, strerror):

		if errno == 17:

			print "A link, file or directory named " + moduleName + " is already present in the modules directory, not linking"

		else:

			raise

	print ""

	regenerateModules()

def delModule(moduleName):

	print "Trying to remove module " + moduleName

	try:

		os.unlink(localmoddir + "/" + moduleName)

		print "Removed module successfully"

	except OSError, (errno, strerror):

		if errno == 2:

			print "No such " + moduleName + " present in the modules directory, not unlinking"

		else:

			raise

	print ""

	regenerateModules()

def usage():

	print "Syntax: ./ModuleManager [options]"

	print "Options:"

	print "  --help               Print this help"

	print "  --regenerate         Regenarate modules and files"

	print "  --list               List avalible and installed modules"

	print "  --add=<module name>  Adds a module to the application"

	print "  --del=<module name>  Removes a module from the application"

	print ""

def main():

	try:

		opts, args = getopt.getopt(sys.argv[1:], "hlr", ["help", "list", "regenerate", "add=", "del="])

	except getopt.GetoptError, err:

		# print help information and exit:

		print str(err) # will print something like "option -a not recognized"

		usage()

		sys.exit(2)

	if len(sys.argv) == 1:

		usage()

		sys.exit()

	for o, a in opts:

		if o in ("-l", "--list"):

			modules = getModules()

			print "Available modules"

			print "================="

			for module in modules:

				print module

			print ""

			modules = getLocalModules()

			print "Modules used in this application"

			print "================================"

			for module in modules:

				print module

		elif o in ("-h", "--help"):

			usage()

			sys.exit()

		elif o in ("-r", "--regenerate"):

			regenerateModules()

		elif o in ("--add"):

			if len(a) == 0:

				print "No modulename specified"

				usage()

				sys.exit()

			if a not in getModules():

				print a + " is not a recognized module name"

				sys.exit()

			addModule(a)

		elif o in ("--del"):

			if len(a) == 0:

				print "No modulename specified"

				usage()

				sys.exit()

			if a not in getModules():

				print a + " is not a recognized module name"

				sys.exit()

			delModule(a)

		else:

			assert False, "unhandled option"

if __name__ == "__main__":

	main()