generate-compose-json.php
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	#!/usr/bin/env php
	<?php

	# -------------------------------------------------------------
	# Generate composer.json from packages metadata
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Keruald
	# License: BSD-2-Clause
	# Dependencies: symfony/yaml, keruald/omnitools
	# -------------------------------------------------------------

	use Keruald\OmniTools\Collections\Vector;
	use Keruald\OmniTools\Collections\HashMap;
	use Symfony\Component\Yaml\Parser as YamlParser;

	require_once __DIR__ . "/../../vendor/autoload.php";

	# -------------------------------------------------------------
	# Helper methods to build elements from metadata
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	function getAutoload(array $packages_namespaces) : array {
	return [
	"psr-4" => HashMap::from($packages_namespaces)
	->flatMap(fn($package, $ns) => [
	$ns . '\\' => $package . "/src/",
	$ns . '\\Tests\\' => $package . "/tests/",
	])
	->toArray()
	];
	}

	function getReplace(array $packages) : array {
	return HashMap::from($packages)
	->mapValuesAndKeys(
	fn($v) => ["keruald/$v", getPackageVersion($v)]
	)
	->toArray();
	}

	function getPackageVersion (string $package) : string {
	$tags = PackagesTags::load();

	return $tags->packages[$package] ?? "self.version";
	}

	class PackagesTags {

	///
	/// Singleton pattern
	///

	private static ?self $instance = null;

	public static function load () : self {
	if (self::$instance === null) {
	self::$instance = new self();
	}

	return self::$instance;
	}

	///
	/// Properties
	///

	public HashMap $packages;

	///
	/// Constructor
	///

	public function __construct () {
	$this->packages = self::getPackagesLastTags();
	}

	///
	/// Read metadata from Git repository
	///

	private static function getPackagesLastTags () : HashMap {
	$map = new HashMap;

	$tags = self::getRepositoryTags();
	foreach ($tags as $tag) {
	[$package, $version] = explode("/", $tag);

	if (!$map->has($package)) {
	$map->set($package, $version);
	continue;
	}

	if (version_compare($map[$package], $version) == -1) {
	$map->set($package, $version);
	}
	}

	return $map;
	}

	private static function getRepositoryTags () : Vector {
	exec("git tag", $tags);

	return Vector::from($tags)
	->filter(fn($tag) => str_contains($tag, "/"));
	}

	}

	# -------------------------------------------------------------
	# Template
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	function run() : never {
	$metadata = (new YamlParser())->parseFile("metadata.yml");
	$flags = JSON_PRETTY_PRINT \| JSON_UNESCAPED_SLASHES \| JSON_UNESCAPED_UNICODE;

	echo json_encode(getTemplate($metadata), $flags), "\n";

	exit(0);
	}

	function getTemplate(array $metadata) : array {
	return [
	"name" => "keruald/keruald",
	"type" => "library",
	"description" => "Modular libraries to build frameworks and applications",
	"keywords" => [
	"framework",
	"keruald",
	],
	"license" => "BSD-2-Clause",
	"homepage" => "https://keruald.nasqueron.org",
	"authors" => [
	[
	"name" => "Sébastien Santoro",
	"email" => "dereckson@espace-win.org",
	],
	[
	"name" => "Keruald contributors",
	],
	],
	"provide" => [
	"psr/simple-cache-implementation" => "1.0\|2.0\|3.0",
	],
	"require" => [
	"psr/simple-cache" => "^1.0\|^2.0\|^3.0",
	"ext-intl" => "*",
	],
	"require-dev" => [
	"ext-mbstring" => "*",
	"ext-mysqli" => "*",
	"ext-xmlwriter" => "*",
	"nasqueron/codestyle" => "^0.0.1",
	"phan/phan" => "^5.3.1",
	"phpunit/phpunit" => "^10.2",
	"symfony/yaml" => "^6.0.3",
	"squizlabs/php_codesniffer" => "^3.6",
	],
	"suggest" => [
	"ext-memcached" => "*",
	"ext-redis" => "*",
	],
	"replace" => getReplace($metadata["packages"]),
	"autoload" => getAutoload($metadata["packages_namespaces"]),
	"scripts" => [
	"lint-src" => "find /src -type f -name '.php' \| xargs -n1 php -l",
	"lint-tests" => "find /tests -type f -name '.php' \| xargs -n1 php -l",
	"test" => "vendor/bin/phpunit",
	],
	"minimum-stability" => "dev",
	];
	}

	run();

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