1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
use strict;
use XML::Simple;
use List::Util qw(min);
my @packagesFiles = ();
my @urlPrefixes = ();
# rpm-closure.pl (<package-file> <url-prefix>)+ <toplevel-pkg>+
while(-f $ARGV[0]) {
my $packagesFile = shift @ARGV;
my $urlPrefix = shift @ARGV;
push(@packagesFiles, $packagesFile);
push(@urlPrefixes, $urlPrefix);
}
sub rpmvercmp {
my ($version1, $version2) = @_;
my @vercmps1 = split /\./, $version1;
my @vercmps2 = split /\./, $version2;
my $l1 = scalar(@vercmps1);
my $l2 = scalar(@vercmps2);
my $l = min($l1, $l2);
for(my $i=0; $i<$l; $i++) {
my $v1 = $vercmps1[$i];
my $v2 = $vercmps2[$i];
if($v1 =~ /^[0-9]*$/ && $v2 =~ /^[0-9]*$/) {
if ( int($v1) > int($v2) ) {
return 1;
}
elsif ( int($v1) < int($v2) ) {
return -1;
}
} else {
if ( $v1 gt $v2 ) {
return 1;
}
elsif ( $v1 lt $v2 ) {
return -1;
}
}
}
if($l1 == $l2) {
return 0;
} elsif ($l1 > $l2) {
return 1;
} elsif ($l1 < $l2) {
return -1;
}
}
my @toplevelPkgs = @ARGV;
my @archs = split ' ', ($ENV{'archs'} or "");
my %pkgs;
for (my $i = 0; $i < scalar(@packagesFiles); $i++) {
my $packagesFile = $packagesFiles[$i];
print STDERR "parsing packages in $packagesFile...\n";
my $xml = XMLin($packagesFile, ForceArray => ['package', 'rpm:entry', 'file'], KeyAttr => []) or die;
print STDERR "$packagesFile contains $xml->{packages} packages\n";
foreach my $pkg (@{$xml->{'package'}}) {
if (scalar @archs > 0) {
my $arch = $pkg->{arch};
my $found = 0;
foreach my $a (@archs) { $found = 1 if $arch eq $a; }
next if !$found;
}
if (defined $pkgs{$pkg->{name}}) {
my $earlierPkg = $pkgs{$pkg->{name}};
print STDERR "WARNING: duplicate occurrence of package $pkg->{name}\n";
# <version epoch="0" ver="1.28.0" rel="2.el6"/>
my $cmp = rpmvercmp($pkg->{'version'}->{ver}, $earlierPkg->{'version'}->{ver});
if ($cmp > 0 || ($cmp == 0 && rpmvercmp($pkg->{'version'}->{rel}, $earlierPkg->{'version'}->{rel})>0)) {
print STDERR "WARNING: replaced package $pkg->{name} (".$earlierPkg->{'version'}->{ver}." ".$earlierPkg->{'version'}->{rel}.") with newer one (".$pkg->{'version'}->{ver}." ".$pkg->{'version'}->{rel}.")\n";
$pkg->{urlPrefix} = $urlPrefixes[$i];
$pkgs{$pkg->{name}} = $pkg;
}
next;
}
$pkg->{urlPrefix} = $urlPrefixes[$i];
$pkgs{$pkg->{name}} = $pkg;
}
}
my %provides;
PKG: foreach my $pkgName (keys %pkgs) {
#print STDERR "looking at $pkgName\n";
my $pkg = $pkgs{$pkgName};
# Skip packages that conflict with a required package.
my $conflicts = $pkg->{format}->{'rpm:conflicts'}->{'rpm:entry'} // [];
foreach my $conflict (@{$conflicts}) {
next if $conflict->{flags} // "" eq "LT" || $conflict->{flags} // "" eq "LE";
#print STDERR " $pkgName conflicts with $conflict->{name}\n";
if (grep { $_ eq $conflict->{name} } @toplevelPkgs) {
print STDERR "skipping package $pkgName because it conflicts with a required package\n";
next PKG;
}
}
my $provides = $pkg->{format}->{'rpm:provides'}->{'rpm:entry'} or die;
foreach my $req (@{$provides}) {
#print STDERR " $pkgName provides $req->{name}\n";
#die "multiple provides for $req->{name}" if defined $provides{$req->{name}};
$provides{$req->{name}} = $pkgName;
}
if (defined $pkg->{format}->{file}) {
foreach my $file (@{$pkg->{format}->{file}}) {
#print STDERR " provides file $file\n";
$provides{$file} = $pkgName;
}
}
}
my %donePkgs;
my @needed = ();
sub closePackage {
my $pkgName = shift;
return if defined $donePkgs{$pkgName};
$donePkgs{$pkgName} = 1;
print STDERR ">>> $pkgName\n";
my $pkg = $pkgs{$pkgName} or die "package $pkgName doesn't exist";
my $requires = $pkg->{format}->{'rpm:requires'}->{'rpm:entry'} || [];
my @deps = ();
foreach my $req (@{$requires}) {
next if $req->{name} =~ /^rpmlib\(/;
#print STDERR " needs $req->{name}\n";
my $provider = $provides{$req->{name}};
if (!defined $provider) {
print STDERR " WARNING: no provider for $req->{name}\n";
next;
}
#print STDERR " satisfied by $provider\n";
push @deps, $provider;
}
closePackage($_) foreach @deps;
push @needed, $pkgName;
}
foreach my $pkgName (@toplevelPkgs) {
closePackage $pkgName;
}
# Generate the output Nix expression.
print "# This is a generated file. Do not modify!\n";
print "# Following are the RPM packages constituting the closure of: @toplevelPkgs\n\n";
print "{fetchurl}:\n\n";
print "[\n\n";
foreach my $pkgName (@needed) {
my $pkg = $pkgs{$pkgName};
print " (fetchurl {\n";
print " url = $pkg->{urlPrefix}/$pkg->{location}->{href};\n";
if ($pkg->{checksum}->{type} eq "sha") {
print " sha1 = \"$pkg->{checksum}->{content}\";\n";
} elsif ($pkg->{checksum}->{type} eq "sha256") {
print " sha256 = \"$pkg->{checksum}->{content}\";\n";
} else {
die "unsupported hash type";
}
print " })\n";
print "\n";
}
print "]\n";
|