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#!/usr/bin/env ruby
# 
# dpkg-checkdeps - utilities to check deb dependency
# Copyright (c) 2001 Fumitoshi UKAI <ukai@debian.or.jp>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# $Id: dpkg-checkdeps.rb,v 1.6 2001/05/15 18:16:26 ukai Exp $
#

require 'debian'
require 'getoptlong'
include Debian

opts = GetoptLong.new(["--to", "-t", GetoptLong::REQUIRED_ARGUMENT],
		      ["--check", "-c", GetoptLong::NO_ARGUMENT],
		      ["--from", "-f", GetoptLong::REQUIRED_ARGUMENT],
		      ["--arch", "-a", GetoptLong::REQUIRED_ARGUMENT],
		      ["--all", "-A", GetoptLong::NO_ARGUMENT],
		      ["--verbose", "-v", GetoptLong::NO_ARGUMENT],
		      ["--quiet", "-q", GetoptLong::NO_ARGUMENT],
		      ["--help", "-h", GetoptLong::NO_ARGUMENT])

$quiet = false
$verbose = false
arch = Dpkg.installation_architecture
def usage
  puts "Usage: #{$0} [opts] [{packagename|package}...]"
  puts "  #{$0} [--to <Packages>] --from <Packages> <packagename> ..."
  puts "  #{$0} [--to <Packages>] --from <Packages> -A"
  puts "  #{$0} [--to <Packages>] <packagefile>..."
  puts "  #{$0} [--to <Packages>] --check <packagename>"
end

$stdout.sync = true
to_packages = nil
from_packages = nil
check_inset = false

begin
  opts.each {|opt, arg|
    case opt
    when "--to" then
      if to_packages == nil
	to_packages = Packages.new
      end
      arg.gsub!(/\$ARCH/,arch)
      Dir[arg].each {|p|
	print "* Loading target #{p}..." if $verbose
	to_packages += Packages.new(p)
	print "done\n" if $verbose
      }
    when "--from" then 
      if from_packages == nil
	from_packages = Packages.new
      end
      arg.gsub!(/\$ARCH/,arch)
      Dir[arg].each {|p|
	print "* Loading source #{p}..." if $verbose
	from_packages += Packages.new(p)
	print "done\n" if $verbose
      }
    when "--arch" then
      arch = arg
      print "* Architecture: #{arch}\n" if $verbose
    when "--all" then
      if from_packages == nil
	$stderr.puts "#{$0}: --all requires --from option"
	raise GetoptLong::InvalidOption
      end
      from_packages.pkgnames {|p|
	ARGV.push(p)
      }
    when "--check" then 
      check_inset = true
    when "--verbose" then $verbose = true
    when "--quiet" then $quiet = true
    when "--help" then usage; exit 0
    else raise GetoptLong::InvalidOption
    end
  }
rescue GetoptLong::InvalidOption
  usage; exit 1
end

if to_packages == nil
  print "* Loading target (dpkg status)..." if $verbose
  to_packages = Status.new
  print "done\n" if $verbose
end
if check_inset && from_packages == nil
  from_packages = to_packages
end

check_packages = to_packages
check_debs = []
while arg = ARGV.shift
  if from_packages == nil
    deb = DpkgDeb.load(arg)
  else
    deb = from_packages[arg]
  end
  if deb == nil
    $stderr.puts "E: Package: #{arg} not found"
    exit 1
  end
  if deb['architecture'] != arch && deb['architecture'] != 'all'
    next
  end
  check_debs.push(deb)
  check_packages[deb.package] = deb
end

unmets = 0
mets = 0
num = 0
if check_inset
  to_packages.each_package {|deb|
    print "* Checking #{deb}\n" if $verbose
    num += 1
    safe = true
    deb.deps('depends').each {|dep|
      check_debs.each {|cdeb|
	if dep.include?(cdeb) && ! dep.satisfy?(cdeb)
	  puts "E: #{deb} does not satisfy #{dep} against #{cdeb}"
	  unmets += 1
	  safe = false
	end
      }
    }
    if safe
      mets += 1
    end
  }
else
  check_debs.each {|deb|
    print "* Checking #{deb}\n" if $verbose
    num += 1
    safe = true
    deb.unmet(check_packages).each {|u|
      puts u
      unmets += 1
      safe = false
    }
    if safe
      mets += 1
    end
  }
end
puts "#{num} packages: #{unmets} unmet in #{num - mets} packages / #{mets} packages ok" unless $quiet
exit (unmets == 0 ? 0 : 1)