#!/usr/bin/perl -w

################################################################
#
# Copyright (c) 1995-2014 SUSE Linux Products GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or 3 as
# published by the Free Software Foundation.
#
# 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 (see the file COPYING); if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
################################################################

BEGIN {
  unshift @INC, ($::ENV{'BUILD_DIR'} || '/usr/lib/build');
}

use strict;

use Build;

my ($dist, $rpmdeps, $archs, $configdir, $useusedforbuild, $installonly, $noinstall);

$configdir = ($::ENV{'BUILD_DIR'} || '/usr/lib/build') . '/configs';

while (@ARGV)  {
  if ($ARGV[0] eq '--dist') {
    shift @ARGV;
    $dist = shift @ARGV;
    next;
  }
  if ($ARGV[0] eq '--depfile') {
    shift @ARGV;
    $rpmdeps = shift @ARGV;
    next;
  }
  if ($ARGV[0] eq '--archpath') {
    shift @ARGV;
    $archs = shift @ARGV;
    next;
  }
  if ($ARGV[0] eq '--configdir') {
    shift @ARGV;
    $configdir = shift @ARGV;
    next;
  }
  if ($ARGV[0] eq '--useusedforbuild') {
    shift @ARGV;
    $useusedforbuild = 1;
    next;
  }
  if ($ARGV[0] eq '--define') {
    shift @ARGV;
    my $def = shift @ARGV;
    Build::define($def);
    next;
  }
  if ($ARGV[0] eq '--with') {
    shift @ARGV;
    my $def = shift @ARGV;
    Build::define("_with_$def --with-$def");
    next;
  }
  if ($ARGV[0] eq '--without') {
    shift @ARGV;
    my $def = shift @ARGV;
    Build::define("_without_$def --without-$def");
    next;
  }
  last;
}

$archs = '' unless defined $archs;
die("you must specfiy a depfile!\n") unless defined $rpmdeps;

# split args in recipe and pkgnames
my $recipe;
my @extradeps;
for my $arg (@ARGV) {
  my $buildtype = Build::recipe2buildtype($arg);
  if ($buildtype) {
    die("can only work with at most one recipe file\n") if defined $recipe;
    $recipe = $arg;
  } else {
    push @extradeps, $arg;
  }
}

my $binarytype;
my @archs = split(':', $archs);
if ($recipe =~ /(^|\/)PKGBUILD$/) {
  push @archs, 'any' unless grep {$_ eq 'any'} @archs;
  $binarytype = 'arch';
} elsif ($recipe =~ /\.dsc$/) {
  push @archs, 'all' unless grep {$_ eq 'noarch'} @archs;
  $binarytype = 'deb';
} else {
  push @archs, 'noarch' unless grep {$_ eq 'noarch'} @archs;
  $binarytype = 'rpm';
}

# read dist if we can
my $cf;
if (defined($dist) && $dist ne '') {
  $cf = Build::read_config_dist($dist, $archs[0], $configdir);
  $binarytype = $cf->{'binarytype'} if $cf->{'binarytype'} && $cf->{'binarytype'} ne 'UNDEFINED';
}

my (%fn, %prov, %req, %con, %obs);

my %packs;
my %repo;
my %ids;

my %packs_arch;
my %packs_done;
open(F, '<', $rpmdeps) || die("$rpmdeps: $!\n");
# WARNING: the following code assumes that the 'I' tag comes last
my ($pkgF, $pkgP, $pkgR, $pkgC, $pkgO);

my $verscmp = \&Build::Rpm::verscmp;

if ($binarytype && $binarytype eq 'deb') {
  $verscmp = \&Build::Deb::verscmp;
  for my $arch (@archs) {
    $arch = Build::Deb::basearch($arch) unless $arch =~ /^i[456]86$/;
  }
}

while(<F>) {
  chomp;
  if (/^F:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    $pkgF = $2;
  } elsif (/^P:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    $pkgP = $2;
  } elsif (/^R:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    $pkgR = $2;
  } elsif (/^C:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    $pkgC = $2;
  } elsif (/^O:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    $pkgO = $2;
  } elsif (/^I:(.*?)-\d+\/\d+\/\d+: (.*)$/) {
    next if $packs_done{$1};
    my ($i, $newid) = ($1, $2);
    undef $i unless !$ids{$i} || $verscmp->($ids{$i}, $newid) < 0;
    undef $i unless defined($pkgF) && defined($pkgP);
    if (defined $i) {
      $i =~ /^(.*)\.([^\.]+)$/ or die;
      push @{$packs_arch{$2}}, $1;
      $ids{$i}  = $newid;
      $fn{$i}   = $pkgF;
      $prov{$i} = $pkgP;
      delete $req{$i};
      delete $con{$i};
      delete $obs{$i};
      $req{$i}  = $pkgR;
      $con{$i}  = $pkgC if defined $pkgC;
      $obs{$i}  = $pkgO if defined $pkgO;
    }
    undef $pkgF;
    undef $pkgP;
    undef $pkgR;
    undef $pkgC;
    undef $pkgO;
  } elsif ($_ eq 'D:') {
    %packs_done = %ids;
  }
}
close F;

for my $arch (@archs) {
  $packs{$_} ||= "$_.$arch" for @{$packs_arch{$arch} || []};
}

# XXX: move to separate tool
if (!defined($dist) || $dist eq '') {
  my $rpmarch = (grep {$fn{"rpm.$_"}} @archs)[0];
  if (!$rpmarch) {
    $dist = 'default';
  } else {
    my $rpmfn = $fn{"rpm.$rpmarch"};
    if ($rpmfn =~ /^[a-z]+:\/\//) {
      require File::Temp;
      my $tmpdir = File::Temp::tempdir('CLEANUP' => 1);
      $rpmfn =~ s/.*\//$tmpdir\// unless system("$INC[0]/download", $tmpdir, $rpmfn);
    }
    my $rpmdist = '';
    if ($rpmfn =~ /^\// && -e $rpmfn) {
      my %res = Build::Rpm::rpmq($rpmfn, 1010);
      $rpmdist = $res{1010}->[0] || '';
    }
    $dist = Build::dist_canon($rpmdist, $archs[0]);
    # need some extra work for sles11 :(
    if ($dist =~ /^sles11-/) {
      my %res = Build::Rpm::rpmq($rpmfn, 1049);
      $dist =~ s/^sles11-/sles11sp2-/ if grep {/^liblzma/} @{$res{1049} || []};
    }
  }
  print STDERR "Warning: distribution not specified, assuming '$dist' (see $configdir).\n";
}

$cf ||= Build::read_config_dist($dist, $archs[0], $configdir);
$cf->{'warnings'} = 1;

my $dofileprovides = %{$cf->{'fileprovides'}};
$dofileprovides = 1 if ($binarytype || 'rpm') ne 'rpm';

for my $pack (keys %packs) {
  my $r = {};
  my (@s, $s, @pr, @re, @co, @ob);
  @s = split(' ', $prov{$packs{$pack}} || '');
  while (@s) {
    $s = shift @s;
    next if !$dofileprovides && $s =~ /^\//;
    if ($s =~ /^rpmlib\(/) {
      splice(@s, 0, 2);
      next;
    }
    push @pr, $s;
    while (@s && $s[0] =~ /^[\(<=>|]/) {
      $pr[-1] .= " $s[0] $s[1]";
      $pr[-1] =~ s/ \((.*)\)/ $1/;
      $pr[-1] =~ s/(<|>){2}/$1/;
      splice(@s, 0, 2);
    }
  }
  @s = split(' ', $req{$packs{$pack}} || '');
  while (@s) {
    $s = shift @s;
    next if !$dofileprovides && $s =~ /^\//;
    if ($s =~ /^rpmlib\(/) {
      splice(@s, 0, 2);
      next;
    }
    push @re, $s;
    while (@s && $s[0] =~ /^[\(<=>|]/) {
      $re[-1] .= " $s[0] $s[1]";
      $re[-1] =~ s/ \((.*)\)/ $1/;
      $re[-1] =~ s/(<|>){2}/$1/;
      splice(@s, 0, 2);
    }
  }
  @s = split(' ', $con{$packs{$pack}} || '');
  while (@s) {
    $s = shift @s;
    next if !$dofileprovides && $s =~ /^\//;
    push @co, $s;
    while (@s && $s[0] =~ /^[\(<=>|]/) {
      $co[-1] .= " $s[0] $s[1]";
      $co[-1] =~ s/ \((.*)\)/ $1/;
      $co[-1] =~ s/(<|>){2}/$1/;
      splice(@s, 0, 2);
    }
  }
  @s = split(' ', $obs{$packs{$pack}} || '');
  while (@s) {
    $s = shift @s;
    next if !$dofileprovides && $s =~ /^\//;
    push @ob, $s;
    while (@s && $s[0] =~ /^[\(<=>|]/) {
      $ob[-1] .= " $s[0] $s[1]";
      $ob[-1] =~ s/ \((.*)\)/ $1/;
      $ob[-1] =~ s/(<|>){2}/$1/;
      splice(@s, 0, 2);
    }
  }
  $r->{'provides'} = \@pr;
  $r->{'requires'} = \@re;
  $r->{'conflicts'} = \@co;
  $r->{'obsoletes'} = \@ob;
  $repo{$pack} = $r;
}


#######################################################################

sub print_rpmlist {
  for (@_) {
    print "$_ $fn{$packs{$_}}\n";
    print "rpmid: $_:$ids{$packs{$_}}\n" if exists $ids{$packs{$_}};
  }
  print "preinstall: @{$cf->{'preinstall'} || []}\n";
  print "vminstall: @{$cf->{'vminstall'} || []}\n";
  print "runscripts: @{$cf->{'runscripts'} || []}\n";
  print "dist: $dist\n" if defined $dist;
  print "installonly: $installonly\n" if defined $installonly;
  print "noinstall: $noinstall\n" if defined $noinstall;
}

if ($useusedforbuild) {
  die("Need a recipe file for --usedforbuild\n") unless defined $recipe;
  local *F;
  open(F, '<', $recipe) || die("$recipe: $!\n");
  my @usedforbuild;
  my @buildrequires;
  while(<F>) {
    chomp;
    if (/^#\s*usedforbuild\s*(.*)$/) {
      push @usedforbuild, split(' ', $1);
    }
    if (/^buildrequires:\s*(.*)$/i) {
      push @buildrequires, split(' ', $1);
    }
  }
  close F;
  @usedforbuild = @buildrequires unless @usedforbuild;
  @usedforbuild = Build::unify(@usedforbuild) if @usedforbuild;
  my @errors;
  for (@usedforbuild) {
    push @errors, "package $_ not found" unless $packs{$_} && $fn{$packs{$_}};
  }
  if (@errors) {
    print STDERR "expansion error\n";
    print STDERR "  $_\n" for @errors;
    exit(1);
  }
  print_rpmlist(@usedforbuild);
  exit(0);
}

#######################################################################

my ($packname, $packvers, $subpacks, @packdeps);
$subpacks = [];

if ($recipe) {
  my $d = Build::parse($cf, $recipe) || {};
  my $buildtype = Build::recipe2buildtype($recipe) || '';
  $cf->{'type'} = $buildtype if $buildtype;
  if ($buildtype eq 'kiwi') {
    # lets see if this is a product or image build
    my $type = $d->{'imagetype'} && $d->{'imagetype'}->[0] eq 'product' ? 'product' : 'image';
    my @kdeps;
    if ($type eq 'image') {
      @kdeps = @{$cf->{'substitute'}->{'kiwi-setup:image'} || []};
      @kdeps = ('kiwi', 'createrepo', 'tar') unless @kdeps;
    } else {
      @kdeps = @{$cf->{'substitute'}->{'kiwi-setup:product'} || []};
      @kdeps = ('kiwi') unless @kdeps;
    }
    push @kdeps, grep {/^kiwi-.*:/} @{$d->{'deps'} || []};
    $d = { 'deps' => \@kdeps, 'subpacks' => [] };
  }
  $packname = $d->{'name'};
  $packvers = $d->{'version'};
  $subpacks = $d->{'subpacks'};
  @packdeps = @{$d->{'deps'} || []};
  if ($d->{'prereqs'}) {
    my %deps = map {$_ => 1} (@packdeps, @{$d->{'subpacks'} || []});
    push @packdeps, '--directdepsend--', grep {!$deps{$_} && !/^%/} @{$d->{'prereqs'}};
  }
}

Build::readdeps($cf, undef, \%repo);

#######################################################################

my @bdeps = Build::get_build($cf, $subpacks, @packdeps, @extradeps);

if (!shift @bdeps) {
  print STDERR "expansion error\n";
  print STDERR "  $_\n" for @bdeps;
  exit(1);
}

my @sysdeps = Build::get_sysbuild($cf);
if (@sysdeps) {
  if (!shift @sysdeps) {
    print STDERR "expansion error\n";
    print STDERR "  $_\n" for @sysdeps;
    exit(1);
  }
  my %sysdeps = map {$_ => 1} @sysdeps;
  my %bdeps = map {$_ => 1} @bdeps;
  $installonly = join(' ', grep {!$bdeps{$_}} @sysdeps);
  $noinstall = join(' ', grep {!$sysdeps{$_}} @bdeps);
  @bdeps = Build::unify(@sysdeps, @bdeps);
}

# make sure all preinstalls are in bdeps;
# XXX: also add vmdeps?
@bdeps = Build::unify(@bdeps, Build::get_preinstalls($cf));

print_rpmlist(@bdeps);