BookStack/dev/licensing/gen-php-licenses

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

// This script reads the project composer.lock file to generate
// clear license details for our PHP dependencies.

declare(strict_types=1);
require "gen-licenses-shared.php";

$rootPath = dirname(__DIR__, 2);
$outputPath = "{$rootPath}/dev/licensing/php-library-licenses.txt";
$composerLock = json_decode(file_get_contents($rootPath . "/composer.lock"));
$outputSeparator = "\n-----------\n";

$packages = $composerLock->packages;
$packageOutput = array_map(packageToOutput(...), $packages);

$licenseInfo =  implode($outputSeparator, $packageOutput) . "\n";
file_put_contents($outputPath, $licenseInfo);

echo "License information written to {$outputPath}\n";
echo implode("\n", getWarnings());

function packageToOutput(stdClass $package) : string {
    global $rootPath;
    $output = ["{$package->name}"];

    $licenses = is_array($package->license) ? $package->license : [$package->license];
    $output[] = "License: " . implode(' ', $licenses);

    $packagePath = "{$rootPath}/vendor/{$package->name}/package.json";
    $licenseFile = findLicenseFile($package->name, $packagePath);
    if ($licenseFile) {
        $relLicenseFile = str_replace("{$rootPath}/", '', $licenseFile);
        $output[] = "License File: {$relLicenseFile}";
        $copyright = findCopyright($licenseFile);
        if ($copyright) {
            $output[] = "Copyright: {$copyright}";
        } else {
            warn("Package {$package->name}: no copyright found in its license");
        }
    }

    $source = $package->source->url;
    if ($source) {
        $output[] = "Source: {$source}";
    }

    $link = $package->homepage ?? $package->source->url ?? '';
    if ($link) {
        $output[] = "Link: {$link}";
    }

    return implode("\n", $output);
}