Migrate Trac 0.10 attachments to 1.0 attachments.

trac-attachments-migrate-0.10-to-1.0.php

<?php
/**
 * Migrates Trac 0.10 attachments to 1.0 attachments.
 *
 * Based on:
 * - https://trac.edgewall.org/browser/branches/1.0-stable/trac/upgrades/db28.py
 * - https://trac.edgewall.org/browser/branches/1.0-stable/trac/attachment.py
 */
if ($argc != 3) {
    printf("USAGE: %s INPUT_DIR OUTPUT_DIR", $argv[0]);
    exit(1);
} else if(!is_dir($argv[1])) {
    printf("ERROR: %s is not a valid INPUT_DIR!", $argv[1]);
    exit(1);
} else if (!is_dir($argv[2])) {
    printf("ERROR: %s is not a valid OUTPUT_DIR!", $argv[2]);
    exit(1);
}

define('INPUT_DIR', realpath($argv[1]));
define('OUTPUT_DIR', realpath($argv[2]));

$files = [];

// Determine attachments to migrate.
$fh = opendir(INPUT_DIR);
while ($ticket = readdir($fh)) {
    if (in_array($ticket, ['.', '..'])) {
        continue;
    }

    $fh2 = opendir(INPUT_DIR . DIRECTORY_SEPARATOR . $ticket);
    while ($file = readdir($fh2)) {
        if (in_array($file, ['.', '..'])) {
            continue;
        }

        $files[] = [
            $ticket, $file
        ];
    }
}

// Migrate attachments.
foreach ($files as $ticketAndFile) {
    list($ticket, $file) = $ticketAndFile;

    // Ticket id.
    $parent_hash = sha1($ticket);
    $prefix = substr($parent_hash, 0, 3);

    // Filename.
    $decoded_file = rawurldecode($file);
    $file_hash = sha1($decoded_file);

    // File extension.
    preg_match("/\.[A-Za-z0-9]+\Z/", $decoded_file, $match);
    $file_extension = $match[0];

    // Directory.
    $source_directory = INPUT_DIR . DIRECTORY_SEPARATOR . $ticket . DIRECTORY_SEPARATOR;
    $target_directory = OUTPUT_DIR . DIRECTORY_SEPARATOR . $prefix . DIRECTORY_SEPARATOR . $parent_hash . DIRECTORY_SEPARATOR;
    if (!is_dir($target_directory)) {
        mkdir($target_directory, 0777, true);
    }

    // Path.
    $source = $source_directory . $file;
    $target = $target_directory . $file_hash . $file_extension;
    copy($source, $target);

    // Log.
    printf("%s\n -> \n%s\n\n", $source, $target);
}