#!/usr/bin/env perl

use strict;
use warnings;

sub cd ($);

my $ver = `bash util/ver`;
chomp $ver;

cd "openresty-$ver/bundle";

opendir(my $dh, '.') or
    die "cannot opendir .: $!";

my @dirs = grep { /\d+\.\d+/ && -d "$_" } readdir($dh);

closedir $dh;

cd '../../t';

opendir($dh, '.') or
    die "cannot opendir .: $!";

my @t_files = grep { /\.t$/ } readdir($dh);

closedir $dh;

for my $t_file (@t_files) {
    open my $in, $t_file or
        die "Cannot open $t_file for reading: $!\n";

    my $outfile = $t_file . '_';
    open my $out, ">$outfile" or
        die "Cannot open $outfile for writing: $!\n";

    my $changed;
    while (<$in>) {
        for my $dir (@dirs) {
            (my $pat = $dir) =~ s/-(\d+\..*)/-/;
            my $orig = $_;
            if (s{\.\./$pat\S+}{../$dir}g && $orig ne $_) {
                $changed++;

                warn "\n- $orig";
                warn "+ $_";

            } elsif (s{openresty-\d+\.\d+\.\d+\.\d+(?:rc\d+)?}{openresty-$ver} && $orig ne $_) {
                $changed++;

                warn "\n- $orig";
                warn "+ $_";

            } elsif (s{OPENRESTY_BUILD_DIR/$pat[^/ \t\n\w]*\d[^/ \t\n]*}{OPENRESTY_BUILD_DIR/$dir}g && $orig ne $_) {
                $changed++;

                warn "\n- $orig";
                warn "+ $_";
            } elsif (s{^cd $pat[^/ \t\n]+}{cd $dir}g && $orig ne $_) {
                $changed++;

                warn "\n- $orig";
                warn "+ $_";
            }

        }

        print $out $_;
    }

    close $out;

    warn "Wrote t/$outfile\n";

    close $in;
}

#print join("\n", map { /^LuaJIT/ ? "* ~$_" : "* $_" } sort @dirs), "\n";

sub cd ($) {
    my $dir = shift;
    print("cd $dir\n");
    chdir $dir or die "failed to cd $dir: $!\n";
}