Pritup pres PHP a docker

app/public/index.php

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+<?php
+
+declare(strict_types=1);
+
+require __DIR__ . '/../src/functions.php';
+
+define('PUBLIC_BASE_URL', resolvePublicBaseUrl());
+
+$name = resolveRequestedName();
+
+if ($name === '') {
+    handleIndexRequest();
+}
+
+if ($name === 'list') {
+    handleListRequest();
+}
+
+if (str_starts_with($name, 'raw/')) {
+    handleRawRequest(substr($name, strlen('raw/')));
+}
+
+handleInstallRequest($name);

app/src/functions.php

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+<?php
+
+declare(strict_types=1);
+
+const MANIFEST_PATH = 'manifest.yaml';
+const REPO_ROOT_DIRECTORY = __DIR__ . '/../..';
+const TEMPLATES_DIRECTORY = __DIR__ . '/../templates';
+
+function sendPlainTextError(int $statusCode, string $message): never
+{
+    http_response_code($statusCode);
+    header('Content-Type: text/plain; charset=utf-8');
+    echo $message . "\n";
+    exit;
+}
+
+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 renderTemplate(string $path, array $placeholders): string|false
+{
+    if (!is_file($path)) {
+        return false;
+    }
+
+    $content = file_get_contents($path);
+
+    foreach ($placeholders as $key => $value) {
+        $content = str_replace('{{' . $key . '}}', $value, $content);
+    }
+
+    return $content;
+}
+
+function readRepoFile(string $relativePath): string|false
+{
+    $path = REPO_ROOT_DIRECTORY . '/' . ltrim($relativePath, '/');
+
+    if (!is_file($path)) {
+        return false;
+    }
+
+    $content = file_get_contents($path);
+
+    return is_string($content) ? $content : false;
+}
+
+function loadManifest(): array
+{
+    $manifestYaml = readRepoFile(MANIFEST_PATH);
+
+    if ($manifestYaml === false) {
+        sendPlainTextError(500, 'Failed to read the manifest');
+    }
+
+    $manifest = yaml_parse($manifestYaml);
+
+    if ($manifest === false) {
+        sendPlainTextError(500, 'Failed to parse the manifest');
+    }
+
+    return $manifest;
+}
+
+function findManifestEntry(string $name): array
+{
+    $manifest = loadManifest();
+
+    $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'");
+    }
+
+    return $entry;
+}
+
+function resolvePublicBaseUrl(): string
+{
+    $publicBaseUrl = getenv('PUBLIC_BASE_URL');
+
+    if ($publicBaseUrl === false || $publicBaseUrl === '') {
+        sendPlainTextError(500, 'PUBLIC_BASE_URL is not configured');
+    }
+
+    return $publicBaseUrl;
+}
+
+function resolveRequestedName(): string
+{
+    $requestPath = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?? '/';
+
+    return trim(rawurldecode($requestPath), '/');
+}
+
+function handleIndexRequest(): never
+{
+    $text = renderTemplate(TEMPLATES_DIRECTORY . '/index.tpl', [
+        'PUBLIC_BASE_URL' => rtrim(PUBLIC_BASE_URL, '/'),
+    ]);
+
+    if ($text === false) {
+        sendPlainTextError(500, 'Index template is missing');
+    }
+
+    header('Content-Type: text/plain; charset=utf-8');
+    echo $text;
+    exit;
+}
+
+function handleListRequest(): never
+{
+    $names = array_keys(loadManifest());
+    sort($names);
+
+    header('Content-Type: text/plain; charset=utf-8');
+    echo "Available configurations:\n";
+
+    foreach ($names as $name) {
+        echo "  $name\n";
+    }
+
+    exit;
+}
+
+function handleRawRequest(string $name): never
+{
+    $entry = findManifestEntry($name);
+
+    $content = readRepoFile($entry['source']);
+
+    if ($content === false) {
+        sendPlainTextError(500, "Failed to read the file for item '$name'");
+    }
+
+    header('Content-Type: application/octet-stream');
+    echo $content;
+    exit;
+}
+
+function handleInstallRequest(string $name): never
+{
+    $entry = findManifestEntry($name);
+
+    $variables = [
+        'SOURCE_URL' => rtrim(PUBLIC_BASE_URL, '/') . '/raw/' . rawurlencode($name),
+        'TARGET_PATH' => resolveHomePath($entry['target']),
+        'POST_INSTALL' => $entry['post_install'] ?? '',
+    ];
+
+    $script = renderTemplate(TEMPLATES_DIRECTORY . '/' . $entry['template'] . '.sh.tpl', $variables);
+
+    if ($script === false) {
+        sendPlainTextError(500, 'Template for this item is missing');
+    }
+
+    header('Content-Type: text/x-shellscript; charset=utf-8');
+    echo $script;
+    exit;
+}

app/templates/config.sh.tpl

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+readonly SOURCE_URL="{{SOURCE_URL}}"
+readonly TARGET_PATH="{{TARGET_PATH}}"
+
+mkdir -p "$(dirname "$TARGET_PATH")"
+curl -fsSL "$SOURCE_URL" -o "$TARGET_PATH"
+echo "Configuration installed: $TARGET_PATH"
+{{POST_INSTALL}}

app/templates/index.tpl

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+Fast access to configurations and installation scripts.
+
+Install a configuration:
+
+    curl -fsSL {{PUBLIC_BASE_URL}}/<name> | bash
+
+List all available configurations:
+
+    curl -fsSL {{PUBLIC_BASE_URL}}/list
+
+Download the raw source file instead of the install script:
+
+    curl -fsSL {{PUBLIC_BASE_URL}}/raw/<name>