ubuntu-dev-tools/404main

#!/usr/bin/python
# The author of this script is unknown
# License: Public Domain
#
# This script is used to check in what components ("main", "restricted",
# "universe" or "multiverse") the dependencies of a package are.

import subprocess
import sys

packages={}

def find_main(pack, version):
	global packages
	mad = subprocess.Popen(['apt-cache madison '+pack], shell=True, stdout=subprocess.PIPE)
	out = mad.stdout.read()
	if out.find("/main")!=-1 or out.find("http")==-1:
		packages[(pack)]="In main"
		return	
	else:
		if not packages.has_key(pack):
			packages[(pack)]="Not in main"
		test = subprocess.Popen(['apt-cache show '+pack], shell=True, stdout=subprocess.PIPE)	
		deps = []
		for j in test.stdout.readlines():
			if j.startswith("Depend"):
				deps = j.strip("\n").strip("Depends: ").split(",")
		depse = []
		for p in deps:
			a = p.split("|")	
			for k in a:
				depse.append(k)
		for i in depse:
			info=i.strip(") ").split("(")
			if len(info) == 2:	
				version = info[1].strip(" ")
			name = info[0].strip(" ")
			if not packages.has_key(name):
				find_main(name, version)

		test = subprocess.Popen(['apt-cache showsrc '+pack], shell=True, stdout=subprocess.PIPE)	
		deps = []
		for j in test.stdout.readlines():
			if j.startswith("Build-Depend"):
				deps = j.strip("\n").strip("Build-Depends: ").split(",")
		depse = []
		for p in deps:
			a = p.split("|")	
			for k in a:
				depse.append(k)
		for i in depse:
			info=i.strip(") ").split("(")
			if len(info) == 2:	
				version = info[1].strip(" ")
			name = info[0].strip(" ")
			if not packages.has_key(name):
				find_main(name, version)

pkg = sys.argv[1]

find_main(pkg,0)

for j in packages:
	if packages[(j)] == "Not in main":
		print j + ": "+packages[(j)]