145 lines
3.7 KiB
PHP
145 lines
3.7 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
const MANIFEST_PATH = 'manifest.yaml';
|
|
const TEMPLATES_DIRECTORY = __DIR__ . '/../templates';
|
|
const FETCH_TIMEOUT_SECONDS = 5;
|
|
|
|
function sendPlainTextError(int $statusCode, string $message): never
|
|
{
|
|
http_response_code($statusCode);
|
|
header('Content-Type: text/plain; charset=utf-8');
|
|
echo $message . "\n";
|
|
exit;
|
|
}
|
|
|
|
function fetchRaw(string $relativePath): string|false
|
|
{
|
|
$url = REPO_RAW_BASE_URL . ltrim($relativePath, '/');
|
|
|
|
$curl = curl_init($url);
|
|
curl_setopt_array($curl, [
|
|
CURLOPT_RETURNTRANSFER => true,
|
|
CURLOPT_FAILONERROR => true,
|
|
CURLOPT_FOLLOWLOCATION => true,
|
|
CURLOPT_MAXREDIRS => 3,
|
|
CURLOPT_TIMEOUT => FETCH_TIMEOUT_SECONDS,
|
|
]);
|
|
|
|
$content = curl_exec($curl);
|
|
|
|
return is_string($content) ? $content : false;
|
|
}
|
|
|
|
function escapeForDoubleQuotedShellString(string $value): string
|
|
{
|
|
return str_replace(['\\', '"', '$', '`'], ['\\\\', '\\"', '\\$', '\\`'], $value);
|
|
}
|
|
|
|
function resolveHomePath(string $path): string
|
|
{
|
|
if ($path === '~' || str_starts_with($path, '~/')) {
|
|
return '$HOME' . escapeForDoubleQuotedShellString(substr($path, 1));
|
|
}
|
|
|
|
return escapeForDoubleQuotedShellString($path);
|
|
}
|
|
|
|
function renderScriptTemplate(string $templateName, array $placeholders): string|false
|
|
{
|
|
$path = TEMPLATES_DIRECTORY . '/' . $templateName . '.sh.tpl';
|
|
|
|
if (!is_file($path)) {
|
|
return false;
|
|
}
|
|
|
|
$script = file_get_contents($path);
|
|
|
|
foreach ($placeholders as $key => $value) {
|
|
$script = str_replace('{{' . $key . '}}', $value, $script);
|
|
}
|
|
|
|
return $script;
|
|
}
|
|
|
|
$repoRawBaseUrl = getenv('REPO_RAW_BASE_URL');
|
|
|
|
if ($repoRawBaseUrl === false || $repoRawBaseUrl === '') {
|
|
sendPlainTextError(500, 'REPO_RAW_BASE_URL is not configured');
|
|
}
|
|
|
|
define('REPO_RAW_BASE_URL', $repoRawBaseUrl);
|
|
|
|
$publicBaseUrl = getenv('PUBLIC_BASE_URL');
|
|
|
|
if ($publicBaseUrl === false || $publicBaseUrl === '') {
|
|
sendPlainTextError(500, 'PUBLIC_BASE_URL is not configured');
|
|
}
|
|
|
|
define('PUBLIC_BASE_URL', $publicBaseUrl);
|
|
|
|
$requestPath = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?? '/';
|
|
$name = trim(rawurldecode($requestPath), '/');
|
|
|
|
if ($name === '') {
|
|
sendPlainTextError(400, 'Missing name of the installable item');
|
|
}
|
|
|
|
$isRawRequest = str_starts_with($name, 'raw/');
|
|
|
|
if ($isRawRequest) {
|
|
$name = substr($name, strlen('raw/'));
|
|
}
|
|
|
|
$repoHost = parse_url(REPO_RAW_BASE_URL, PHP_URL_HOST);
|
|
|
|
$manifestYaml = fetchRaw(MANIFEST_PATH);
|
|
|
|
if ($manifestYaml === false) {
|
|
sendPlainTextError(502, "Failed to fetch the manifest from $repoHost");
|
|
}
|
|
|
|
$manifest = yaml_parse($manifestYaml);
|
|
|
|
if ($manifest === false) {
|
|
sendPlainTextError(502, "Failed to parse the manifest from $repoHost");
|
|
}
|
|
|
|
$entry = $manifest[$name] ?? null;
|
|
|
|
if ($entry === null) {
|
|
sendPlainTextError(404, "Unknown item '$name'");
|
|
}
|
|
|
|
if (!is_string($entry['source'] ?? null) || !is_string($entry['target'] ?? null) || !is_string($entry['template'] ?? null)) {
|
|
sendPlainTextError(500, "Malformed manifest entry for item '$name'");
|
|
}
|
|
|
|
if ($isRawRequest) {
|
|
$content = fetchRaw($entry['source']);
|
|
|
|
if ($content === false) {
|
|
sendPlainTextError(502, "Failed to fetch the file from $repoHost");
|
|
}
|
|
|
|
header('Content-Type: application/octet-stream');
|
|
echo $content;
|
|
exit;
|
|
}
|
|
|
|
$variables = [
|
|
'SOURCE_URL' => rtrim(PUBLIC_BASE_URL, '/') . '/raw/' . rawurlencode($name),
|
|
'TARGET_PATH' => resolveHomePath($entry['target']),
|
|
'POST_INSTALL' => $entry['post_install'] ?? '',
|
|
];
|
|
|
|
$script = renderScriptTemplate($entry['template'], $variables);
|
|
|
|
if ($script === false) {
|
|
sendPlainTextError(500, 'Template for this item is missing');
|
|
}
|
|
|
|
header('Content-Type: text/x-shellscript; charset=utf-8');
|
|
echo $script;
|