modpack-downloader.php

<?php
if($argc < 2)
  die("Give modpack url as argument");

$url = $argv[1] . "/files/latest";

$modpack_headers = get_headers($url, 1);

if(!in_array("HTTP/1.1 200 OK", $modpack_headers))
  die("URL isn't valid\n");

echo "Downloading modpack\n";
$modpack = download(end($modpack_headers["Location"]))[0];

echo "\nExtracting modpack\n";
$tmp = sys_get_temp_dir();
$filename = tempnam($tmp, 'modpack');
file_put_contents($filename, $modpack);

$extract = $filename . ".dir";
// echo $extract;
if(!mkdir($extract, 0700))
  die("Couldn't create directory\n");

$zip = new ZipArchive;
$res = $zip->open($filename);
if ($res === TRUE) {
  $zip->extractTo($extract);
  $zip->close();
} else {
  die("Couldn't open zipfile\n");
}

// $extract = "/tmp/modpack8SD0u1.dir";

echo "Reading manifest\n";

$manifest = json_decode(file_get_contents($extract . "/manifest.json"), true);
if($manifest["manifestType"] != "minecraftModpack" || $manifest["manifestVersion"] != 1)
  die("Unsupported manifest\n");


$overrides = $extract . "/" . $manifest["overrides"];

$total = count($manifest["files"]);
foreach ($manifest["files"] as $number => $file) {
  if(!$file["required"]){
    echo "File " . $number+1 . "/" . $total . " not required\n";
    continue;
  }
  echo "Downloading mod ";
  echo $number+1 . "/" . $total . "\n";
  $jar = download("https://minecraft.curseforge.com/projects/" .
  $file["projectID"] . "/files/" . $file["fileID"] . "/download");
  file_put_contents($overrides . "/mods/" . $jar[1], $jar[0]);
  echo "\nSuccessfully downloaded " . $jar[1] . "\n\n";
}

echo "Finished! go check " . $extract . "\n";

unlink($filename);
// rmdir($extract);

function download($url) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  //curl_setopt($ch, CURLOPT_BUFFERSIZE,128);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'progress');
  curl_setopt($ch, CURLOPT_NOPROGRESS, false); // needed to make progress function work
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
  $file = curl_exec($ch);
  $last_url = explode('/',curl_getinfo($ch, CURLINFO_EFFECTIVE_URL));
  curl_close($ch);
  return [$file, end($last_url)];
}

function progress($resource,$download_size, $downloaded, $upload_size, $uploaded)
{
  // static $previous_time = 0;
  if ( !$download_size == 0) {
    $progress = round( $downloaded * 100 / $download_size );
    echo "\033[5D";      // Move 5 characters backward
    echo str_pad($progress, 3, ' ', STR_PAD_LEFT) . " %";
    $previous_time = time();
  }
}