---
name: "Catmandu::Fix::cmd"
section: "3pm"
platform: "linux"
package: "libcatmandu-fix-cmd-perl"
version: "0.0201-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Catmandu::Fix::cmd"
---

# Catmandu::Fix::cmd(3pm)

pipe data to be fixed through an external process

## NAME

Catmandu::Fix::cmd - pipe data to be fixed through an external process

## VERSION

Version 0.0201

## DESCRIPTION

This fix passes data as a JSON object to an external process over stdin and reads a JSON object from it's stdout.

## SYNOPSIS

```
    my $fixer = Catmandu::Fix->new(fixes => [
        # pipe data through the jq command-line json processor
        # keeping only the title field
        'cmd("jq -c -M {title}")',
        # ...
    ]);
    # a canonical external program in perl
    use JSON;
    while (<STDIN>) {
        my $data = decode_json($_);
        # ...
        print encode_json($data);
    }
```

## SEE ALSO

Catmandu::Fix

## AUTHOR

Nicolas Steenlant, `"<nicolas.steenlant at ugent.be>"`

## LICENSE AND COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.