perl/generatedependencies

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#!/usr/bin/perl
use strict;
use warnings;
# Split "A B >= 1" dependencies string into ("A", "B >= 1") list.
sub appendsymbols {
my ($array, $line) = @_;
my $qualified;
my $dependency;
for my $token (split(/\s/, $line)) {
if ($token =~ /\A[<>]?=\z/) {
$qualified = 1;
$dependency .= ' ' . $token;
next;
}
if (!$qualified) {
if (defined $dependency) {
push @$array, $dependency;
}
$dependency = $token;
next;
}
if ($qualified) {
$qualified = 0;
$dependency .= ' ' . $token;
push @$array, $dependency;
$dependency = undef;
next;
}
}
if (defined $dependency) {
push @$array, $dependency;
}
}
# Return true if the argument is a Perl dependency. Otherwise return false.
sub is_perl_dependency {
my $dependency = shift;
return ($dependency =~ /\Aperl\(/);
}
my $file = shift @ARGV;
if (!defined $file) {
die "Missing an argument with an RPM build log!\n"
}
# Parse build log
open(my $log, '<', $file) or die "Could not open `$file': $!\n";
my ($package, %packages);
while (!eof($log)) {
defined($_ = <$log>) or die "Error while reading from `$file': $!\n";
chomp;
if (/\AProcessing files: ([\S]+)-[^-]+-[^-]+$/) {
$package = $1;
$packages{$package}{requires} = [];
$packages{$package}{provides} = [];
} elsif ($package && /\AProvides: (.*)\z/) {
appendsymbols($packages{$package}{provides}, $1);
} elsif ($package && /\ARequires: (.*)\z/) {
appendsymbols($packages{$package}{requires}, $1);
}
}
close($log);
# Save dependencies into file
my $filename = 'gendep.macros';
open (my $gendep, '>', $filename) or
die "Could not open `$filename' for writing: $!\n";
for my $package (sort keys %packages) {
# Macro name
my $macro = 'gendep_' . $package;
$macro =~ s/[+-]/_/g;
$gendep->print("%global $macro \\\n");
# Macro value
for my $dependency (@{$packages{$package}{requires}}) {
if (is_perl_dependency($dependency)) {
$gendep->print("Requires: $dependency \\\n");
}
}
for my $dependency (@{$packages{$package}{provides}}) {
if (is_perl_dependency($dependency)) {
$gendep->print("Provides: $dependency \\\n");
}
}
# Macro trailer
$gendep->print("%{nil}\n");
}
close($gendep) or die "Could not close `$filename': $!\n";
__END__
=encoding utf8
=head1 NAME
generatedependencies - Distil generated Perl dependencies from a build log
=head1 SYNOPSIS
B<generatedependencies> I<BUILD_LOG>
=head1 DESCRIPTION
It opens specified RPM build log I<BUILD_LOG>. It locates a protocol about
autogenerated dependencies. It stores the reported dependencies into F<./gendep.macros> file.
The output file will define macros C<gendep_I<BINARY_PACKAGE_NAME>>. A macro
for each binary package. The macro name will use underscores instead of
hyphens or other SPEC language special characters.
It will ignore non-Perl dependencies (not C<perl(*)>) as they do not come from
Perl dependency generator.
=head1 EXIT CODE
Returns zero, if no error occurred. Otherwise non-zero code is returned.
=head1 EXAMPLE
The invocation is:
$ generatedependencies .build-5.24.0-364.fc25.log
The output is:
$ grep -A5 perl_Devel_Peek gendep.macros
%global gendep_perl_Devel_Peek \
Requires: perl(Exporter) \
Requires: perl(XSLoader) \
Provides: perl(Devel::Peek) = 1.23 \
%nil{}
%global gendep_perl_Devel_SelfStubber \
The output can be used in a spec file like:
Name: perl
Source0: gendep.macros
%include %{SOURCE0}
%package Devel-Peek
%gendep_Devel_Peek
%package Devel-SelfStubber
%gendep_Devel_SelfStubber
=head1 COPYING
Copyright (C) 2016 Petr Písař <ppisar@redhat.com>
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 3 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, see <http://www.gnu.org/licenses/>.
=cut