aboutsummaryrefslogtreecommitdiffstats
path: root/rpmtools.pm
blob: 280e899007818156474b0d1c623ad3da16e7052a (plain)
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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
package rpmtools;

use strict;
use vars qw($VERSION @ISA);

require DynaLoader;

@ISA = qw(DynaLoader);
$VERSION = '0.01';

bootstrap rpmtools $VERSION;

#- build an empty params struct that can be used to compute dependancies.
sub new {
    bless {
	   use_base_flag => 0,
	   flags         => [ qw(name version release size arch group requires provides) ],
	   info          => {},
	   depslist      => [],
	   provides      => {},
	  };
}

#- read one or more hdlist files, use packdrake for decompression.
sub read_hdlists {
    my ($params, @hdlists) = @_;

    local *F;
    open F, "packdrake -c ". join (' ', @hdlists) ." |";
    rpmtools::_parse_(fileno *F, $params->{flags}, $params->{info}, $params->{provides});
    close F;
    1;
}

#- read one or more rpm files.
sub read_rpms {
    my ($params, @rpms) = @_;

    foreach (@rpms) {
	rpmtools::_parse_($_, $params->{flags}, $params->{info}, $params->{provides});
    }
    1;
}

#- compute dependancies, result in stored in info values of params.
#- operations are incremental, it is possible to read just one hdlist, compute
#- dependancies and read another hdlist, and again.
sub compute_depslist {
    my ($params) = @_;

    #- avoid recomputing already present infos, take care not to modify
    #- existing entries, as the array here is used instead of values of infos.
    my @info = grep { ! exists $_->{id} } values %{$params->{info}};

    #- speed up the search by giving a provide from all packages.
    #- and remove all dobles for each one !
    foreach (@info) {
	push @{$params->{provides}{$_->{name}} ||= []}, $_->{name};
    }

    #- remove all dobles for each provides.
    foreach (keys %{$params->{provides}}) {
	$params->{provides}{$_} or next;
	my %provides; @provides{@{$params->{provides}{$_}}} = ();
	$params->{provides}{$_} = [ keys %provides ];
    }

    #- search for entries in provides, if such entries are found,
    #- another pass has to be done. TODO.

    #- take into account in which hdlist a package has been found.
    #- this can be done by an incremental take into account generation
    #- of depslist.ordered part corresponding to the hdlist.
    #- compute closed requires, do not take into account choices.
    foreach (@info) {
	my %required_packages;
	my @required_packages;
	my %requires; @requires{@{$_->{requires} || []}} = ();
	my @requires = keys %requires;

	while (my $req = shift @requires) {
	    ref $req or $req = $params->{provides}{$req} || ($req =~ /rpmlib\(/ ? [] :
							     [ ($req !~ /NOTFOUND_/ && "NOTFOUND_") . $req ]);
	    if (@$req > 1) {
		#- this is a choice, no closure need to be done here.
		exists $requires{$req} or push @required_packages, $req;
		$requires{$req} = undef;
	    } else {
		#- this could be nothing if the provides is a file not found.
		#- and this has been fixed above.
		foreach (@$req) {
		    my $info = $params->{info}{$_};
		    $required_packages{$_} = undef; $info or next;
		    if ($info->{deps} && !$info->{requires}) {
			#- the package has been read from an ordered depslist file, and need
			#- to rebuild its requires tags, so it can safely be used here.
			my @rebuild_requires;
			foreach (split /\s+/, $info->{deps}) {
			    if (/\|/) {
				push @rebuild_requires, [ map { $params->{depslist}[$_]{name} || $_ } split /\|/, $_ ];
			    } else {
				push @rebuild_requires, $params->{depslist}[$_]{name} || $_;
			    }
			}
			$info->{requires} = \@rebuild_requires;
		    }
		    foreach (@{$info->{requires} || []}) {
			unless (exists $requires{$_}) {
			    $requires{$_} = undef;
			    push @requires, $_;
			}
		    }
		}
	    }
	}
	unshift @required_packages, keys %required_packages;

	delete $_->{requires}; #- affecting it directly make perl crazy, oops for rpmtools. TODO
	$_->{requires} = \@required_packages;
    }

    #- sort packages, expand choices and closure again.
    my %ordered;
    foreach (@info) {
	my %requires;
	my @requires = ($_->{name});
	while (my $dep = shift @requires) {
	    foreach (@{$params->{info}{$dep} && $params->{info}{$dep}{requires} || []}) {
		if (ref $_) {
		    foreach (@$_) {
			unless (exists $requires{$_}) {
			    $requires{$_} = undef;
			    push @requires, $_;
			}
		    }
		} else {
		    unless (exists $requires{$_}) {
			$requires{$_} = undef;
			push @requires, $_;
		    }
		}
	    }
	}

	if ($_->{name} eq 'basesystem') {
	    foreach (keys %requires) {
		$ordered{$_} += 10001;
	    }
	} else {
	    foreach (keys %requires) {
		++$ordered{$_};
	    }
	}
    }
    #- setup, filesystem and basesystem should be at the beginning.
    @ordered{qw(setup filesystem basesystem)} = (30000, 20000, 10000);

    #- compute base flag, consists of packages which are required without
    #- choices of basesystem and are ALWAYS installed. these packages can
    #- safely be removed from requires of others packages.
    foreach (@{$params->{info}{basesystem}{requires}}) {
	ref $_ or $params->{info}{$_} and $params->{info}{$_}{base} = undef;
    }

    #- give an id to each packages, start from number of package already
    #- registered in depslist.
    my $global_id = scalar @{$params->{depslist}};
    foreach (sort { $ordered{$b->{name}} <=> $ordered{$a->{name}} } @info) {
	$_->{id} = $global_id++;
    }

    #- recompute requires to use packages id, drop any base packages or
    #- reference of a package to itself.
    foreach my $pkg (sort { $a->{id} <=> $b->{id} } @info) {
	my %requires_id;
	my @requires_id;
	foreach (@{$pkg->{requires}}) {
	    if (ref $_) {
		#- all choices are grouped together at the end of requires,
		#- this allow computation of dropable choices.
		my @choices_id;
		my $to_drop;
		foreach (@$_) {
		    my ($id, $base) = $params->{info}{$_} ? ($params->{info}{$_}{id},
							     $params->{use_base_flag} && exists $params->{info}{$_}{base}) : ($_, 0);
		    $to_drop ||= $id == $pkg->{id} || $requires_id{$id} || $base;
		    push @choices_id, $id;
		}
		$to_drop or push @requires_id, \@choices_id;
	    } else {
		my ($id, $base) = $params->{info}{$_} ? ($params->{info}{$_}{id},
							 $params->{use_base_flag} && exists $params->{info}{$_}{base}) : ($_, 0);
		$requires_id{$id} = $_;
		$id == $pkg->{id} or $base or push @requires_id, $id;
	    }
	}
	#- cannot remove requires values as they are necessary for closure on incremental job.
	$pkg->{deps} = join(' ', map { join '|', @{ref $_ ? $_ : [$_]} } @requires_id);
	$pkg->{name} eq 'basesystem' and $params->{use_base_flag} = 1;
	push @{$params->{depslist}}, $pkg;
    }
    1;
}

#- read depslist.ordered file, as if it was computed internally.
sub read_depslist {
    my ($params, $FILE) = @_;
    my $global_id = scalar @{$params->{depslist}};

    foreach (<$FILE>) {
	chomp; /^\s*#/ and next;
	my ($name, $version, $release, $size, $deps) = /^(\S*)-([^-\s]+)-([^-\s]+)\s+(\d+)\s*(.*)/;

	#- store values here according to it.
	push @{$params->{depslist}}, $params->{info}{$name} = {
							       name        => $name,
							       version     => $version,
							       release     => $release,
							       size        => $size,
							       deps        => $deps,
							       id          => $global_id++,
							      };
    }

    #- compute base flag, consists of packages which are required without
    #- choices of basesystem and are ALWAYS installed. these packages can
    #- safely be removed from requires of others packages.
    if ($params->{info}{basesystem} && ! exists $params->{info}{basesystem}{base}) {
	my @requires_id;
	foreach (split /\s+/, $params->{info}{basesystem}{deps}) {
	    /\|/ or push @requires_id, $_;
	}
	foreach (@requires_id) {
	    $params->{depslist}[$_] and $params->{depslist}[$_]{base} = undef;
	}
	$params->{info}{basesystem}{base} = undef; #- make sure.
	$params->{use_base_flag} = 1;
    }
    1;
}

#- relocate depslist array to use only the most recent packages,
#- reorder info hashes too in the same manner.
sub relocate_depslist {
    my ($params) = @_;
    my $relocated_entries = 0;

    foreach (@{$params->{depslist} || []}) {
	if ($params->{info}{$_->{name}} != $_) {
	    #- at this point, it is sure there is a package that
	    #- is multiply defined and this should be fixed.
	    #- first correct info hash, then a second pass on depslist
	    #- is required to relocate its entries.
	    my $cmp_version = version_compare($_->{version}, $params->{info}{$_->{name}});
	    if ($cmp_version > 0 || $cmp_version == 0 && version_compare($_->{release}, $params->{info}{$_->{name}}) > 0) {
		$params->{info}{$_->{name}} = $_;
		++$relocated_entries;
	    }
	}
    }

    if ($relocated_entries) {
	for (0 .. scalar(@{$params->{depslist}}) - 1) {
	    my $pkg = $params->{depslist}[$_];
	    $params->{depslist}[$_] = $params->{info}{$pkg->{name}};
	}
    }

    $relocated_entries;
}

#- write depslist.ordered file according to info in params.
sub write_depslist {
    my ($params, $FILE, $min, $max) = @_;

    $min > 0 or $min = 0;
    defined $max && $max < scalar(@{$params->{depslist} || []}) or $max = scalar(@{$params->{depslist} || []}) - 1;
    $max >= $min or return;

    for ($min..$max) {
	my $pkg = $params->{depslist}[$_];
	printf $FILE "%s-%s-%s %s %s\n", $pkg->{name}, $pkg->{version}, $pkg->{release}, $pkg->{size}, $pkg->{deps};
    }
    1;
}

#- fill params provides with files that can be used, it use the format for
#- a provides file.
sub read_provides_files {
    my ($params, $FILE) = @_;

    foreach (<$FILE>) {
	chomp;
	my ($k, @v) = split ':';
	$k =~ /^\// and $params->{provides}{$k} ||= undef;
    }
    1;
}

#- check if there has been a problem with reading hdlists or rpms
#- to resolve provides on files.
#- this is done by checking whether there exists a keys in provides
#- hash where to value is null (and the key is a file).
#- give the result as output.
sub get_unresolved_provides_files {
    my ($params) = @_;
    my ($k, $v, @unresolved);

    while (($k, $v) = each %{$params->{provides}}) {
	$k =~ /^\// && ! defined $v and push @unresolved, $k;
    }
    @unresolved;
}

#- clean everything on provides but keep the files key entry on undef.
#- this is necessary to try a second pass.
sub keep_only_cleaned_provides_files {
    my ($params) = @_;

    foreach (keys %{$params->{provides}}) {
	/^\// ? $params->{provides}{$_} = undef : delete $params->{provides}{$_};
    }

    #- clean everything else at this point.
    $params->{use_base_flag} = 0;
    $params->{info} = {};
    $params->{depslist} = [];
}

#- read provides, first is key, after values.
sub read_provides {
    my ($params, $FILE) = @_;

    foreach (<$FILE>) {
	chomp;
	my ($k, @v) = split ':';
	$params->{provides}{$k} = @v > 0 ? \@v : undef;
    }
}

#- write provides, first is key, after values.
sub write_provides {
    my ($params, $FILE) = @_;
    my ($k, $v);

    while (($k, $v) = each %{$params->{provides}}) {
	printf $FILE "%s\n", join ':', $k, @{$v || []};
    }
}

#- read compss, look at DrakX for more info.
sub read_compss {
    my ($params, $FILE) = @_;
    my $p;

    foreach (<$FILE>) {
	/^\s*$/ || /^#/ and next;
	s/#.*//;

	if (/^(\S.*)/) {
	    $p = $1;
	} else {
	    /(\S+)/;
	    $params->{info}{$1} and $params->{info}{$1}{group} = $p;
	}
    }
    1;
}

#- write compss.
sub write_compss {
    my ($params, $FILE) = @_;
    my %p;

    foreach (values %{$params->{info}}) {
	$_->{group} or next;
	push @{$p{$_->{group}} ||= []}, $_->{name};
    }
    foreach (sort keys %p) {
	print $FILE $_, "\n";
	foreach (@{$p{$_}}) {
	    print $FILE "\t", $_, "\n";
	}
	print $FILE "\n";
    }
    1;
}

#- compare a version string.
sub version_compare {
    my ($a, $b) = @_;
    local $_;

    while ($a || $b) {
	my ($sb, $sa) =  map { $1 if $a =~ /^\W*\d/ ? s/^\W*0*(\d+)// : s/^\W*(\D+)// } ($b, $a);
	$_ = length($sa) cmp length($sb) || $sa cmp $sb and return $_;
    }
}

1;