CLI tool to download Google Fonts into a local directory, in WOFF2 format, while rewriting Google Fonts CSS to point to local files.

google-font-packager.php

<?php

/************************************************************************************************
 * Google Font Packager
 * Version 1.0 (2018-02-11)
 * by Matheus Pratta (https://github.com/matheusmk3)
 */

if (!isset($argv[1]))
	die ('Usage: google-font-packager.php [google-font-import-url [output-file.css]]');

// Set our Google Fonts URL
$google_font_url = $argv[1];

// Test for 'output-file.css' argument
if (isset($argv[2]))
	$raw_output_file = $argv[2];
else
	$raw_output_file = 'output-file.css';

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////

function dd ($d) {
	var_dump($d);
	exit;
}

function _ ($data) { echo $data . "\r\n"; }

function wget ($url) {
	_ ('Fetching: ' . $url);

    $user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36';

    $options = array(

        CURLOPT_CUSTOMREQUEST  =>"GET",        //set request type post or get
        CURLOPT_POST           =>false,        //set to GET
        CURLOPT_USERAGENT      => $user_agent, //set user agent
        CURLOPT_COOKIEFILE     =>"cookie.txt", //set cookie file
        CURLOPT_COOKIEJAR      =>"cookie.txt", //set cookie jar
        CURLOPT_RETURNTRANSFER => true,     // return web page
        CURLOPT_HEADER         => false,    // don't return headers
        CURLOPT_FOLLOWLOCATION => true,     // follow redirects
        CURLOPT_ENCODING       => "",       // handle all encodings
        CURLOPT_AUTOREFERER    => true,     // set referer on redirect
        CURLOPT_CONNECTTIMEOUT => 120,      // timeout on connect
        CURLOPT_TIMEOUT        => 120,      // timeout on response
        CURLOPT_MAXREDIRS      => 10,       // stop after 10 redirects
        CURLOPT_SSL_VERIFYPEER => 0,
        CURLOPT_SSL_VERIFYHOST => 0,
    );

    $ch      = curl_init( $url );
    curl_setopt_array( $ch, $options );
    $content = curl_exec( $ch );
    $err     = curl_errno( $ch );
    $errmsg  = curl_error( $ch );
    $header  = curl_getinfo( $ch );
    curl_close( $ch );

    _ ('Returned: ' . $err . ' (' . $errmsg . ')');

    return $content;
}

// \/\*([\w\s\-]+)\*\/\n\@font-face {([\w\s\-\:\'\;\(\)\,\/\.\+]+)}
$REGEX_FONT = '/\/\*([\w\s\-]+)\*\/\n\@font-face {([\w\s\-\:\'\;\(\)\,\/\.\+]+)}/mis';

// font-family:[\s+]'([\s\w]+)';
$REGEX_FONT_FAMILY = "/font-family:[\s+]'([\s\w]+)'/mis";

// font-weight:[\s]([\d]+)
$REGEX_FONT_WEIGHT = '/font-weight:[\s]([\d]+)/mis';

// font-style:[\s]([\w]+);
$REGEX_FONT_STYLE = '/font-style:[\s]([\w]+);/mis';

// url\(([\S]+)\)
$REGEX_FONT_SOURCE = '/url\(([\S]+)\)/mis';

// \.([\w]+)
$REGEX_FONT_SOURCE_FORMAT = '/\.([\w]+)/mis';

_ ('Obtaining Google Font...');

// Fetch our Google Font
$raw_font = wget ($google_font_url);

_ ('Processing...');

preg_match_all($REGEX_FONT, $raw_font, $font_matches);

$font_locales = $font_matches[1];
$font_data = $font_matches[2];

_ ('Found ' . count($font_data) . ' fonts.');

// This is our output fonts CSS
$final_fonts_css = $raw_font;

$font_directory = 'fonts_local';
@mkdir ($font_directory);

foreach ($font_data as $i => $font) {
	// Get font locale
	$font_locale = trim($font_locales[$i]);

	// Get font family name
	preg_match ($REGEX_FONT_FAMILY, $font, $font_family);
	$font_family = trim($font_family[1]);

	// Get font weight
	preg_match ($REGEX_FONT_WEIGHT, $font, $font_weight);
	$font_weight = trim($font_weight[1]);

	// Get font style
	preg_match ($REGEX_FONT_STYLE, $font, $font_style);
	$font_style = trim($font_style[1]);

	// Get font source url
	preg_match ($REGEX_FONT_SOURCE, $font, $font_source);
	$font_source = $font_source[1];

	// Get font source url format
	preg_match_all ($REGEX_FONT_SOURCE_FORMAT, $font_source, $font_source_format);
	$font_source_format = $font_source_format[1][count($font_source_format[1]) - 1];

	// Set font final name
	$font_output = $font_family .  '-' . $font_locale . '-' . $font_weight . $font_style . '.' . $font_source_format;
	$font_output_path = $font_directory . '/' . $font_output;

	_ (' ');
	_ ('Font ' . ($i + 1) . ' of ' . count($font_data) . '...');
	_ ('Font Family: ' . $font_family);
	_ ('Font Weight: ' . $font_weight);
	_ ('Font Style: ' . $font_style);
	_ ('Font Locale: ' . $font_locale);
	_ ('Font Source: ' . $font_source);
	_ ('Font Source Format: ' . $font_source_format);
	_ ('Font Output: ' . $font_output);

	_ ('Preparing source...');
	$final_fonts_css = str_replace($font_source, $font_output_path, $final_fonts_css);

	_ ('Downloading font...');
	$font_source = wget ($font_source);

	_ ('Writing font...');
	file_put_contents($font_output_path, $font_source);
}

_ ('Writing output file...');
file_put_contents($raw_output_file, $final_fonts_css);

_ ('Finished!');