#INSERTED

#Prints a list of packages, showing differences in compile-time options to the settings that would be used if

#recompiled now. If an argument is supplied, it only displays packages of which the argument is a substring.

#The location of the vardbtree is hardcoded because it is in the vardbiapi.

#TODO: allow regular expressions as search arguments.

elif "diff"==myaction:

	#If we were supplied with a search string

	if ( myfiles ):

		print "Scaning for packagenames including \"" + myfiles[0] + "\"."

	else:

		print "Scanning all packages." 

	print

	#Set root for vardb

	myRoot = portage.root + "var/db/pkg/"

	#Get a list of the options currenty used to compile.

	currCFlags = portage.settings["CFLAGS"].split( " " )

	#Scan through all categories

	try:

		categories = portage.listdir ( myRoot )

	except OSError:

		print "Error opening catalogue " + myRoot + "."

		sys.exit(-1)

	categories.sort()

	for y in categories:

		#Scan through all packages, listing their flags

		try:

			pkgList = portage.listdir ( myRoot + y )

		except OSError:

			pkgList = [] #In case there is a file in the /var/db/pkg/

		pkgList.sort()

		for x in pkgList:

			#Check if this file satisfies search criteria

			#TODO: replace string.find by regular expression equiv. 

			if ( not myfiles or string.find ( y + "/" + x, myfiles[0] ) >=0 ):

				#Print name of package

				print green("*") + y + "/" + x + ": "

				#Get info about package

				try:

					myCFlagsFile = open ( myRoot + y + "/" + x + "/CFLAGS", "r" )

				except (IOError,OSError): 

					print red( "Error opening CFLAGS file" )

					print

					continue #Skip this package and go on to next one.

				#Read in file, stripping last char, which is a '\n'

				myCFlagsData = string.rstrip ( myCFlagsFile.readline() ) 

				#Split data into separate options

				myCFlags = myCFlagsData.split( " " )

				#Make a list of settings this package does not have

				myCFlagsLacking = ""

				for z in currCFlags:

					if ( not z in myCFlags ):

						myCFlagsLacking += ( z + " " )

				#Make a list of settings this package has in excess

				myCFlagsExtra = ""

				for z in myCFlags:

					if ( not z in currCFlags ):

						myCFlagsExtra += ( z + " " )					

				#If settings match

				if ( not myCFlagsLacking and not myCFlagsExtra ):

					print blue("Up to date")

				#If there are differences

				else:

					#Print options

					print red("Lacks:  ") + myCFlagsLacking

					print red("Excess: ") + myCFlagsExtra

				#Done displaying this package

				print 

				#Close cflags file

				myCFlagsFile.close()

			#else:

				#Package does not match criteria. Do not show.

				#print y + "/" + x + " " + str( string.find( myfiles[0], y + "/" + x ) )

			#End processing file. If no match then nothing done

		#End scanning packages

	#End scanning categories

#/INSERTED