txt merge for novels

txt-merge.php

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

try {

  if (!isset($argv[1])) {
      throw new Exception("Missing target path", 1);

  }

  $targetRoot = realpath(sprintf('%s/%s', getcwd(), $argv[1]));

  $readMe = getReadMe($targetRoot);

  $globPattern = "$targetRoot/{,*,*/*,*/*/*,*/*/*/*}.txt";
  $files = glob($globPattern, GLOB_BRACE);

  usort($files, 'textIndexCompare');

  $exportPath = $readMe['output'];

  foreach($files as $file) {
      $header = sprintf("====================\n    START:%s\n===================\n\n",pathinfo($file)['filename']);
      file_put_contents($exportPath, $header, FILE_APPEND);
      file_put_contents($exportPath, file_get_contents($file), FILE_APPEND);
      $footer = sprintf("====================\n    END:%s\n===================\n\n",pathinfo($file)['filename']);
      file_put_contents($exportPath, $footer, FILE_APPEND);
  }

}
catch (Exception $e) {
    printf("\nError: %s\n\n", $e->getMessage());
    exit;
}

function textIndexCompare($a, $b) {
    $aIndex = getIndexByFileName($a);
    $bIndex = getIndexByFileName($b);

    return strcmp($aIndex, $bIndex);
}

function getIndexByFileName($filename) {

    preg_match_all('/(\d{4,})_/', $filename, $matches);
    if (!isset($matches[1])) {
        return '0';
    }

    $index = implode('', $matches[1]);

    return $index;
}

function getReadMe($targetRoot) {
    $result = [
        'name' => 'unknown'
    ];
    $globPattern = "$targetRoot/{,*,*/*,*/*/*,*/*/*/*}.md";
    $files = glob($globPattern, GLOB_BRACE);

    if (isset($files[0])) {
        $readme = file_get_contents($files[0]);
        // dd($readme);
        preg_match_all('/title_zh.?: (.*)/', $readme, $matches);
        if (isset($matches[1]) && $title = array_pop($matches[1])) {
            $result['name'] = trim($title);
        }
    }

    $outputBase = sprintf('%s/out', getcwd());

    if (!file_exists($outputBase)) {
        mkdir($outputBase, 0644);
    }

    $result['output'] = sprintf('%s/%s 00 Web.txt', $outputBase, $result['name']);
    $exportPath = sprintf('%s/out/', getcwd());
    $result['output'] = sprintf('%s/%s 00 Web.txt', $exportPath, $result['name']);

    return $result;
}