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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 $VERSION = '2.83'; # VERSION
has '+command' => sub { Carp::croak "@{[ __PACKAGE__ ]} requires command property" };
has 'args' => [];
has 'secondary' => 0;
has 'match' => undef;
has 'match_stderr' => undef;
has 'version' => undef;
has 'version_stderr' => undef;
has 'atleast_version' => undef;
sub init
{
my($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 2.83
=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