Author Topic: MUD support code? (ex: mass search/replace script)  (Read 2979 times)

Offline chaos

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MUD support code? (ex: mass search/replace script)
« on: July 09, 2007, 04:24:46 PM »
Are people interested in seeing MUD support code here, such as Unix scripts designed to help in MUD work?  For example, the following isn't MUD code as such, but a Perl script that's been absolutely crucial to me in MUD work over the years: my directory-hierarchy search-and-replace script.  Clearly, it's not LPC (the only way you can tell that it's for the use of an LPmud admin is that it skips files named .swap.*), but it seems likely to be of interest.  It should work under any reasonably recent Perl 5 install.  Thoughts?

Code: [Select]
#!/usr/bin/perl

use strict;

use Fcntl qw( :DEFAULT :flock :seek );
use File::Spec;
use IO::Handle;

die "Usage: $0 startdir search replace\n"
    unless scalar @ARGV == 3;
my $startdir = shift @ARGV || '.';
my $search = shift @ARGV or
    die "Search parameter cannot be empty.\n";
my $replace = shift @ARGV;
$search = qr/\Q$search\E/o;

my @stack;

sub process_file($) {
    my $file = shift;
    my $fh = new IO::Handle;
    sysopen $fh, $file, O_RDONLY or
        die "Cannot read $file: $!\n";
    my $found;
    while(my $line = <$fh>) {
        if($line =~ /$search/) {
            $found = 1;
            last;
        }
    }
    if($found) {
        print "  Processing in $file\n";
        seek $fh, 0, SEEK_SET;
        my @file = <$fh>;
        foreach my $line (@file) {
            $line =~ s/$search/$replace/g;
        }
        close $fh;
        sysopen $fh, $file, O_WRONLY or
            die "Cannot write $file: $!\n";
        print $fh @file;
    }
    close $fh;
}

sub process_dir($) {
    my $dir = shift;
    my $dh = new IO::Handle;
    print "Entering $dir\n";
    opendir $dh, $dir or
        die "Cannot open $dir: $!\n";
    while(defined(my $cont = readdir($dh))) {
        next
            if $cont eq '.' || $cont eq '..';
        # Skip .swap files
        next
            if $cont =~ /^\.swap\./o;
        my $fullpath = File::Spec->catfile($dir, $cont);
        if($cont =~ /$search/) {
            my $newcont = $cont;
            $newcont =~ s/$search/$replace/g;
            print "  Renaming $cont to $newcont\n";
            rename $fullpath, File::Spec->catfile($dir, $newcont);
            $cont = $newcont;
            $fullpath = File::Spec->catfile($dir, $cont);
        }
        if(-l $fullpath) {
            my $link = readlink($fullpath);
            if($link =~ /$search/) {
                my $newlink = $link;
                $newlink =~ s/$search/$replace/g;
                print "  Relinking $cont from $link to $newlink\n";
                unlink $fullpath;
                my $res = symlink($newlink, $fullpath);
                warn "Symlink of $newlink to $fullpath failed\n"
                    unless $res;
            }
        }
        next
            unless -r $fullpath && -w $fullpath;
        if(-d $fullpath) {
            push @stack, $fullpath;
        } elsif(-f $fullpath) {
            process_file($fullpath);
        }
    }
    closedir($dh);
}

if(-f $startdir) {
    process_file($startdir);
} elsif(-d $startdir) {
    @stack = ($startdir);
    while(scalar(@stack)) {
        process_dir(shift(@stack));
    }
} else {
    die "$startdir is not a file or directory\n";
}

Offline chaos

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Re: MUD support code? (ex: mass search/replace script)
« Reply #1 on: July 15, 2007, 02:11:25 PM »
Doesn't look like it makes a difference to anyone... for whom it may concern, though, there's one problem with the version I posted.  The sysopen on line 39 needs to be O_WRONLY | O_TRUNC.  Correct version below.

Code: [Select]
#!/usr/bin/perl

use strict;

use Fcntl qw( :DEFAULT :flock :seek );
use File::Spec;
use IO::Handle;

die "Usage: $0 startdir search replace\n"
    unless scalar @ARGV == 3;
my $startdir = shift @ARGV || '.';
my $search = shift @ARGV or
    die "Search parameter cannot be empty.\n";
my $replace = shift @ARGV;
$search = qr/\Q$search\E/o;

my @stack;

sub process_file($) {
    my $file = shift;
    my $fh = new IO::Handle;
    sysopen $fh, $file, O_RDONLY or
        die "Cannot read $file: $!\n";
    my $found;
    while(my $line = <$fh>) {
        if($line =~ /$search/) {
            $found = 1;
            last;
        }
    }
    if($found) {
        print "  Processing in $file\n";
        seek $fh, 0, SEEK_SET;
        my @file = <$fh>;
        foreach my $line (@file) {
            $line =~ s/$search/$replace/g;
        }
        close $fh;
        sysopen $fh, $file, O_WRONLY | O_TRUNC or
            die "Cannot write $file: $!\n";
        print $fh @file;
    }
    close $fh;
}

sub process_dir($) {
    my $dir = shift;
    my $dh = new IO::Handle;
    print "Entering $dir\n";
    opendir $dh, $dir or
        die "Cannot open $dir: $!\n";
    while(defined(my $cont = readdir($dh))) {
        next
            if $cont eq '.' || $cont eq '..';
        # Skip .swap files
        next
            if $cont =~ /^\.swap\./o;
        my $fullpath = File::Spec->catfile($dir, $cont);
        if($cont =~ /$search/) {
            my $newcont = $cont;
            $newcont =~ s/$search/$replace/g;
            print "  Renaming $cont to $newcont\n";
            rename $fullpath, File::Spec->catfile($dir, $newcont);
            $cont = $newcont;
            $fullpath = File::Spec->catfile($dir, $cont);
        }
        if(-l $fullpath) {
            my $link = readlink($fullpath);
            if($link =~ /$search/) {
                my $newlink = $link;
                $newlink =~ s/$search/$replace/g;
                print "  Relinking $cont from $link to $newlink\n";
                unlink $fullpath;
                my $res = symlink($newlink, $fullpath);
                warn "Symlink of $newlink to $fullpath failed\n"
                    unless $res;
            }
        }
        next
            unless -r $fullpath && -w $fullpath;
        if(-d $fullpath) {
            push @stack, $fullpath;
        } elsif(-f $fullpath) {
            process_file($fullpath);
        }
    }
    closedir($dh);
}

if(-f $startdir) {
    process_file($startdir);
} elsif(-d $startdir) {
    @stack = ($startdir);
    while(scalar(@stack)) {
        process_dir(shift(@stack));
    }
} else {
    die "$startdir is not a file or directory\n";
}

Offline cratylus

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Re: MUD support code? (ex: mass search/replace script)
« Reply #2 on: July 17, 2007, 11:13:11 PM »
Quote
Doesn't look like it makes a difference to anyone.

It's appreciated. It's just low-traffic around here. Think of it as message-in-a-bottle
for the guy a year from now that hits it in a google search and thanks his
deities you were kind enough to share :)

Thanks for the contribution.

-Crat

Offline Atomic

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Re: MUD support code? (ex: mass search/replace script)
« Reply #3 on: August 23, 2007, 07:45:27 AM »
...that what Crat said.... low traffic but nonetheless very much appreciated.  ;)
Always remember that the early bird gets the worm first, but the fi...*SNAP*...second mouse gets the cheese.