transform_proxmox_template.php

#!/usr/bin/env php
<?php

/*
 * This script will transform file names for templates downloaded for OpenVZ[1],
 * to match the format used in Proxmox[2].
 * 
 * [1] https://download.openvz.org/template/precreated/
 * [2] http://pve.proxmox.com/wiki/Template_naming_convention
 *
 * Example formats:
 *   debian-8.0-x86_64-minimal.tar.gz    => debian-8.0-minimal_8.0_amd64.tar.gz
 *   debian-8.0-x86_64.tar.gz            => debian-8.0-standard_8.0_amd64.tar.gz
 *   debian-7.0-x86-minimal.tar.gz       => debian-7.0-minimal_7.0_i386.tar.gz
 *   centos-6-x86.tar.gz                 => centos-6-standard_6.0_i386.tar.gz
 *   debian-6.0-x86-minimal.tar.gz       => debian-6.0-minimal_6.0_i386.tar.gz
 */

$inputs = array_slice($argv, 1);

if(count($inputs) === 0) {
    fprintf(STDOUT, "Usage: %s file1 [file2...]\n", $argv[0]);
    exit(1);
}

foreach($inputs as $input) {
    $basename = basename($input);
    $file = basename($input, '.tar.gz');
    $bits = explode('-', $file);

    if(count($bits) !== 3 && count($bits) !== 4) {
        throw new Exception('Invalid input file: '.$input);
    }

    $os = $bits[0];
    $version = $bits[1];
    $arch = transformArch($bits[2]);

    if(array_key_exists(3, $bits)) {
        $name = $bits[3];
    }
    else {
        $name = 'standard';
    }

    if($arch !== 'i386' && $arch !== 'amd64') {
        throw new Exception('Invalid arch: '.$arch);
    }

    $formatted = sprintf('%s-%s-%s_%.1f_%s.tar.gz', $os, $version, $name, $version, $arch);

    printf("%-35s => %s\n", $basename, $formatted);
}

function transformArch($arch) {
    $archLookup = array(
        'x86'       => 'i386',
        'i486'      => 'i386',
        'i586'      => 'i386',
        'i686'      => 'i386',
        'x86_64'    => 'amd64',
    );

    if(array_key_exists($arch, $archLookup)) {
        return $archLookup[$arch];
    }
    else {
        return $arch;
    }
}

exit(0);