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files >> //usr/local/share/perl5/Alien/Build/Plugin/Probe/CommandLine.pm
package Alien::Build::Plugin::Probe::CommandLine; use strict; use warnings; use 5.008004; use Alien::Build::Plugin; use Carp (); use Capture::Tiny qw( capture ); use File::Which (); use Alien::Util qw( version_cmp ); # ABSTRACT: Probe for tools or commands already available our $VERSION = '2.80'; # VERSION has '+command' => sub { Carp::croak "@{[ __PACKAGE__ ]} requires command property" }; has 'args' => []; has 'secondary' => 0; has 'match' => undef; has 'match_stderr' => undef; has 'version' => undef; has 'version_stderr' => undef; has 'atleast_version' => undef; sub init { my($self, $meta) = @_; my $check = sub { my($build) = @_; unless(File::Which::which($self->command)) { die 'Command not found ' . $self->command; } if(defined $self->match || defined $self->match_stderr || defined $self->version || defined $self->version_stderr) { my($out,$err,$ret) = capture { system( $self->command, @{ $self->args } ); }; die 'Command did not return a true value' if $ret; die 'Command output did not match' if defined $self->match && $out !~ $self->match; die 'Command standard error did not match' if defined $self->match_stderr && $err !~ $self->match_stderr; if (defined $self->version or defined $self->version_stderr) { my $found_version = '0'; if(defined $self->version) { if($out =~ $self->version) { $found_version = $1; $build->runtime_prop->{version} = $found_version; } } if(defined $self->version_stderr) { if($err =~ $self->version_stderr) { $found_version = $1; $build->hook_prop->{version} = $found_version; $build->runtime_prop->{version} = $found_version; } } if (my $atleast_version = $self->atleast_version) { if(version_cmp ($found_version, $self->atleast_version) < 0) { # reset the versions $build->runtime_prop->{version} = undef; $build->hook_prop->{version} = undef; die "CommandLine probe found version $found_version, but at least $atleast_version is required."; } } } } $build->runtime_prop->{command} = $self->command; 'system'; }; if($self->secondary) { $meta->around_hook( probe => sub { my $orig = shift; my $build = shift; my $type = $orig->($build, @_); return $type unless $type eq 'system'; $check->($build); }, ); } else { $meta->register_hook( probe => $check, ); } } 1; __END__ =pod =encoding UTF-8 =head1 NAME Alien::Build::Plugin::Probe::CommandLine - Probe for tools or commands already available =head1 VERSION version 2.80 =head1 SYNOPSIS use alienfile; plugin 'Probe::CommandLine' => ( command => 'gzip', args => [ '--version' ], match => qr/gzip/, version => qr/gzip ([0-9\.]+)/, ); =head1 DESCRIPTION This plugin probes for the existence of the given command line program. =head1 PROPERTIES =head2 command The name of the command. =head2 args The arguments to pass to the command. =head2 secondary If you are using another probe plugin (such as L<Alien::Build::Plugin::Probe::CBuilder> or L<Alien::Build::Plugin::PkgConfig::Negotiate>) to detect the existence of a library, but also need a program to exist, then you should set secondary to a true value. For example when you need both: use alienfile; # requires both liblzma library and xz program plugin 'PkgConfig' => 'liblzma'; plugin 'Probe::CommandLine' => ( command => 'xz', secondary => 1, ); When you don't: use alienfile; plugin 'Probe::CommandLine' => ( command => 'gzip', secondary => 0, # default ); =head2 match Regular expression for which the program output should match. =head2 match_stderr Regular expression for which the program standard error should match. =head2 version Regular expression to parse out the version from the program output. The regular expression should store the version number in C<$1>. =head2 version_stderr Regular expression to parse out the version from the program standard error. The regular expression should store the version number in C<$1>. =head2 atleast_version The minimum required version as provided by the system. =head1 SEE ALSO L<Alien::Build>, L<alienfile>, L<Alien::Build::MM>, L<Alien> =head1 AUTHOR Author: Graham Ollis E<lt>plicease@cpan.orgE<gt> Contributors: Diab Jerius (DJERIUS) Roy Storey (KIWIROY) Ilya Pavlov David Mertens (run4flat) Mark Nunberg (mordy, mnunberg) Christian Walde (Mithaldu) Brian Wightman (MidLifeXis) Zaki Mughal (zmughal) mohawk (mohawk2, ETJ) Vikas N Kumar (vikasnkumar) Flavio Poletti (polettix) Salvador Fandiño (salva) Gianni Ceccarelli (dakkar) Pavel Shaydo (zwon, trinitum) Kang-min Liu (劉康民, gugod) Nicholas Shipp (nshp) Juan Julián Merelo Guervós (JJ) Joel Berger (JBERGER) Petr Písař (ppisar) Lance Wicks (LANCEW) Ahmad Fatoum (a3f, ATHREEF) José Joaquín Atria (JJATRIA) Duke Leto (LETO) Shoichi Kaji (SKAJI) Shawn Laffan (SLAFFAN) Paul Evans (leonerd, PEVANS) Håkon Hægland (hakonhagland, HAKONH) nick nauwelaerts (INPHOBIA) Florian Weimer =head1 COPYRIGHT AND LICENSE This software is copyright (c) 2011-2022 by Graham Ollis. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =cut
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