#!/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.

use strict;
use warnings;

use lib "$ENV{'LINTIAN_ROOT'}/lib/";
use Util qw(fail);

my (undef, undef, $dir) = @ARGV;

open SCRIPTS, '>', "$dir/scripts" or fail "cannot open scripts output file: $!";
open INDEX, '<', "$dir/index" or fail "cannot open index file: $!";

my $file;
my $magic;
my $scriptpath;

while (<INDEX>) {
    next unless /^-/;   # skip non-files
    chop;

    # Extract the filename field from the tar-like file index.
    # Note that the split is done with an explicit limit so that filenames
    # with embedded spaces are handled correctly.
    $file = (split(' ', $_, 6))[5];
    $file =~ s/ link to .*//;    # cut off info about hard links
    # This used to call fail() instead of next.  However, the check to
    # see if all files in the index can be opened should be done elsewhere.
    open(FILE, '<', "$dir/unpacked/$file") or next;
    if (read(FILE, $magic, 2) and $magic eq '#!' and not eof(FILE)) {
        $scriptpath = <FILE>;
        chomp($scriptpath);
        next if ($scriptpath =~ m/^\#!/); # skip lincity data files
                                          # #!#!#!
        my $copy_path = $scriptpath;
        $scriptpath =~ s/^\s+//; # remove leading whitespace
        $scriptpath =~ s/^\#.*//; # remove comments
        if ($scriptpath eq '') {
            print SCRIPTS "$copy_path $file\n";
        } else {
        # This used to have (\S+) rather than (\S*), but that went wrong
        # with scripts that start with an empty #! line.
            my $env = '';
            if ($scriptpath =~ s,^/usr/bin/env\s+,,) {
                $env = 'env ';
            }
            $scriptpath =~ s/^(\S*).*/$1/s;
            print SCRIPTS $env . "$scriptpath $file\n";
        }
    }
    close(FILE);
}
close(INDEX);
close(SCRIPTS) or fail("cannot write scripts file: $!");

open SCRIPTS, '>', "$dir/control-scripts"
    or fail("cannot open control-scripts output file: $!");

opendir CONTROL, "$dir/control"
    or fail("cannot read control directory: $!");

for $file (readdir CONTROL) {
    next if -l "$dir/control/$file" or ! -f _;
    open FILE, '<', "$dir/control/$file" or fail "cannot open control/$file: $!";
    if (read(FILE, $magic, 2) and $magic eq '#!') {
        $scriptpath = <FILE>;
        $scriptpath =~ s/^\s*(\S*).*/$1/s;
        print SCRIPTS "$scriptpath $file\n"
    }
    close(FILE);
}
closedir(CONTROL);
close(SCRIPTS) or fail("cannot write control-scripts file: $!");

exit 0;

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