File: mkdiffdepend

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#!/usr/bin/perl

use strict;
use warnings;
use COD::SOptions qw( getOptions );

my $script_depend_file;
my $output_dir;

@ARGV = getOptions(
    '--script-depend' => \$script_depend_file,
    '-o,--output-directory' => \$output_dir,
);

my %script_depend;
if( $script_depend_file ) {
    open( my $inp, $script_depend_file );
    while( <$inp> ) {
        s/\n$//;
        my( $script, $depend ) = split( /\s*:\s*/, $_ );
        $script_depend{$script} = $depend;
    }
    close $inp;
}

$output_dir = '.' unless $output_dir;
$output_dir =~ s/\\$//;

foreach my $filename ( @ARGV ) {
    my $target;
    my @prereq;
    if( $filename =~ m|/(.*?)_(\d{2,4})\.\w{3}$| ) {
        $target = "${output_dir}/${1}_${2}.diff";
        my $prereq = $1;
        $prereq =~ s/cases/scripts/;
        @prereq = ( $prereq );
        if( exists $script_depend{$prereq} ) {
            @prereq = ( @prereq, $script_depend{$prereq} );
        }
    } elsif ( $filename =~ /\.sh$/ ) {
        my @dependencies =
            split( "\n", `tools/mkshdepend $filename | head -n -3` );
        my $prereq;
        foreach( @dependencies ) {
            my( $target_now, $prereq_now ) = split( /\s*:\s*/, $_ );
            next if !$target_now || !$prereq_now;
            $target = $target_now if !$target;
            if( $prereq ) {
                $prereq .= " $prereq_now";
            } else {
                $prereq = $prereq_now;
            }
        }
        next if !$target || !$prereq;
        $target =~ s/\.sh.log$/.diff/;
        $target =~ s/shtests/shoutputs/;
        @prereq = split /\s+/, $prereq;
        my @prereq_now = @prereq;
        foreach( @prereq ) {
            next if !exists $script_depend{$_};
            @prereq_now = ( @prereq_now, $script_depend{$_} );
        }
        @prereq = @prereq_now;
    }
    next if !@prereq;
    my $line = "$target: " . join( ' ', @prereq );
    $line =~ s|tests/outputs/cases/|tests/outputs/|;
    print $line, "\n";
}