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#!/usr/bin/perl -w
# scripts -- lintian collection script

# Copyright (C) 1998 Richard Braakman
#
# 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 2 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, you can find it on the World Wide
# Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.

package Lintian::coll::scripts;

no lib '.';

use strict;
use warnings;
use autodie;

use lib "$ENV{'LINTIAN_ROOT'}/lib/";
use Lintian::Collect;
use Lintian::Util qw(strip);

sub collect {
    my ($pkg, $type, $dir) = @_;
    my $info = Lintian::Collect->new($pkg, $type, $dir);
    my $scripts_fd; # We lazily open this FD.

    foreach my $file ($info->sorted_index) {
        next unless $file->is_regular_file and $file->is_open_ok;
        my $scriptpath = shebang_line($file);

        next unless defined($scriptpath); # no shebang line => not a script

        # skip lincity data files
        # magic: #!#!#!
        next if ($scriptpath =~ m/^\#!/);
        my $copy_path = $scriptpath;
        $scriptpath =~ s/^\#.*//; # remove comments

        if (!defined($scripts_fd)) {
            open($scripts_fd, '>', "$dir/scripts");
        }

        if ($scriptpath eq '') {
            print {$scripts_fd} "$copy_path $file\n";
        } else {
            my $env = '';
            if ($scriptpath =~ s,^/usr/bin/env\s+,,) {
                $env = 'env ';
            }
            # Remove everything after the first space (i.e. any options)
            $scriptpath =~ s/\s++ .++ \Z//xsm;
            print {$scripts_fd} $env . "$scriptpath $file\n";
        }
    }
    close($scripts_fd) if defined($scripts_fd);

    open(my $ctrl_fd, '>', "$dir/control-scripts");
    for my $path ($info->control_index('')->children) {
        next unless $path->is_open_ok;
        # Only collect maintainer scripts
        next unless $path =~ m/^(?:(?:pre|post)(?:inst|rm)|config)$/;

        # Allow ELF binaries
        my $fd = $path->open;
        my ($magic, $scriptpath);
        if (read($fd, $magic, 4)) {
            $scriptpath = 'ELF' if $magic eq "\x7FELF";
        }
        close($fd);
        # If they aren't ELF, look for a shebang
        $scriptpath = $scriptpath // shebang_line($path) // '';

        # Remove everything after the first space (i.e. any options)
        $scriptpath =~ s/\s++ .++ \Z//xsm;
        print {$ctrl_fd} "$scriptpath $path\n";
    }
    close($ctrl_fd);

    return;
}

sub shebang_line {
    my ($path) = @_;
    my ($scriptpath, $magic);
    my $fd = $path->open;
    if (read($fd, $magic, 2) and $magic eq '#!' and not eof($fd)) {
        $scriptpath = <$fd>;
        strip($scriptpath);
    }
    close($fd);
    return $scriptpath;
}

collect(@ARGV) if $0 =~ m,(?:^|/)scripts$,;

1;

# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et