#!/usr/bin/python

import os,sys,imp,string

def usage():
	print "Usage: catalyst [-f file] [variable=value ...]"
	print " -h --help		print this usage and exit"
	print " -v --version		display version information"
	print " -f --file 		read specified file for build instructions"
	print " variable=value		specify a variable/value pair"

def vers():
	print "Gentoo catalyst, version "+version
	print "Copyright 2003-2004 Gentoo Technologies, Inc."
	print "Distributed under the GNU General Public License version 2"

version="1.0"

if len(sys.argv)==1 or sys.argv[1] in ["-h","--help"]:
	usage()
	sys.exit(1)
elif sys.argv[1] in ["-v","--version"]:
	vers()
	sys.exit(1)
if os.getuid()!=0:
	#non-root callers can't go any further than here. 
	print "catalyst: This script requires root privileges to operate."
	sys.exit(1)

myspec={}
myconf={}
if os.path.exists("/etc/catalyst.conf"):
	try:
		execfile("/etc/catalyst.conf",myconf,myconf)
	except:
		print "catalyst: Unable to /etc/catalyst.conf config file (syntax error)"
		sys.exit(1)

confdefaults={ "storedir":"/var/tmp/catalyst","sharedir":"/usr/share/catalyst","distdir":"/usr/portage/distfiles",
"portdir":"/usr/portage","options":"ccache"}

for x in confdefaults.keys():
	if myconf.has_key(x):
		print "Setting",x,"to config file value \""+myconf[x]+"\""
		myspec[x]=myconf[x]
	else:
		print "Setting",x,"to default value \""+confdefaults[x]+"\""
		myspec[x]=confdefaults[x]

#This allows plugins (and this code) to import modules in the /modules dir
sys.path.append(myspec["sharedir"]+"/modules")
try:
	from catalyst_support import *
	import targets
except ImportError:
	print "catalyst: python modules not found in "+myspec["sharedir"]+"/modules; exiting."
	sys.exit(1)

targetmap={}
targets.register(targetmap)

if "ccache" in string.split(myspec["options"]):
	if not os.path.exists("/root/.ccache"):
		os.makedirs("/root/.ccache")
	print "Compiler cache support enabled."
	myspec["CCACHE"]="1"
if "pkgcache" in string.split(myspec["options"]):
	print "Package cache support enabled."
	myspec["PKGCACHE"]="1"

if sys.argv[1] in ["-f", "--file" ]:
	try:
		addlargs=read_spec(sys.argv[2])
	except:
		raise CatalystError,"Unable to read spec file",sys.argv[2]
	unparsedargs=sys.argv[3:]
else:
	addlargs={}
	unparsedargs=sys.argv[1:]
try:
	arg_parse(myspec,addlargs,unparsedargs)
	if not targetmap.has_key(myspec["target"]):
		raise CatalystError,"Target \""+myspec["target"]+"\" not available."
	mytarget=targetmap[myspec["target"]](myspec,addlargs)
	
	mytarget.run()
except CatalystError:
	sys.exit(1)