mlld/dist/chunk-RO3YC7AJ.mjs.map

mlld: a modular prompt scripting language

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* as fs from 'fs/promises';\nimport * as path from 'path';\nimport { createHash } from 'crypto';\n\ninterface CacheEntry {\n  content: string;\n  contentHash: string;\n  url: string;\n  cachedAt: string;\n  size: number;\n}\n\nexport interface ImmutableCacheOptions {\n  inMemory?: boolean;\n}\n\nexport class ImmutableCache {\n  private cacheDir?: string;\n  private inMemory: boolean;\n  private memoryCache: Map<string, CacheEntry>;\n  \n  constructor(projectPath: string, options?: ImmutableCacheOptions) {\n    this.inMemory = options?.inMemory || false;\n    this.memoryCache = new Map();\n    \n    if (this.inMemory) {\n      // In-memory mode - no filesystem operations\n      return;\n    }\n    \n    // In serverless/read-only environments, use /tmp\n    // Detect by checking if we're in /var/task (Vercel) or if LAMBDA_TASK_ROOT is set (AWS Lambda)\n    const isServerless = projectPath.startsWith('/var/task') || \n                        process.env.LAMBDA_TASK_ROOT || \n                        process.env.VERCEL || \n                        process.env.AWS_LAMBDA_FUNCTION_NAME;\n    \n    if (isServerless) {\n      // Use /tmp which is writable in serverless environments\n      this.cacheDir = path.join('/tmp', '.mlld', 'cache', 'imports');\n    } else {\n      // Store cache in .mlld/cache directory\n      this.cacheDir = path.join(projectPath, '.mlld', 'cache', 'imports');\n    }\n  }\n\n  /**\n   * Get cached content by URL and hash\n   */\n  async get(url: string, expectedHash?: string): Promise<string | null> {\n    // In test mode, always return cache miss\n    if (process.env.MLLD_TEST === '1') {\n      return null;\n    }\n    \n    const urlHash = this.hashUrl(url);\n    \n    // Handle in-memory mode\n    if (this.inMemory) {\n      const entry = this.memoryCache.get(urlHash);\n      if (!entry) return null;\n      \n      // If hash provided, verify it matches\n      if (expectedHash && entry.contentHash !== expectedHash) {\n        return null;\n      }\n      \n      return entry.content;\n    }\n    \n    // Filesystem mode\n    const cachePath = path.join(this.cacheDir!, urlHash);\n    \n    try {\n      // Read metadata\n      const metaPath = `${cachePath}.meta.json`;\n      const metaContent = await fs.readFile(metaPath, 'utf8');\n      const meta = JSON.parse(metaContent);\n      \n      // If hash provided, verify it matches\n      if (expectedHash && meta.contentHash !== expectedHash) {\n        return null;\n      }\n      \n      // Read cached content\n      const content = await fs.readFile(cachePath, 'utf8');\n      \n      // Verify integrity\n      const actualHash = createHash('sha256').update(content, 'utf8').digest('hex');\n      if (actualHash !== meta.contentHash) {\n        // Cache corrupted, remove it\n        await this.remove(url);\n        return null;\n      }\n      \n      return content;\n    } catch (error) {\n      // Cache miss or error\n      return null;\n    }\n  }\n\n  /**\n   * Store content in cache\n   */\n  async set(url: string, content: string): Promise<string> {\n    // In test mode, skip caching\n    if (process.env.MLLD_TEST === '1') {\n      return createHash('sha256').update(content, 'utf8').digest('hex');\n    }\n    \n    const urlHash = this.hashUrl(url);\n    const contentHash = createHash('sha256').update(content, 'utf8').digest('hex');\n    \n    // Handle in-memory mode\n    if (this.inMemory) {\n      const entry: CacheEntry = {\n        url,\n        content,\n        contentHash,\n        cachedAt: new Date().toISOString(),\n        size: content.length\n      };\n      this.memoryCache.set(urlHash, entry);\n      return contentHash;\n    }\n    \n    // Filesystem mode\n    // Ensure cache directory exists\n    await fs.mkdir(this.cacheDir!, { recursive: true });\n    \n    const cachePath = path.join(this.cacheDir!, urlHash);\n    \n    // Write content\n    await fs.writeFile(cachePath, content, 'utf8');\n    \n    // Write metadata\n    const meta = {\n      url,\n      contentHash,\n      cachedAt: new Date().toISOString(),\n      size: content.length\n    };\n    await fs.writeFile(`${cachePath}.meta.json`, JSON.stringify(meta, null, 2));\n    \n    return contentHash;\n  }\n\n  /**\n   * Remove cached entry\n   */\n  async remove(url: string): Promise<void> {\n    const urlHash = this.hashUrl(url);\n    \n    // Handle in-memory mode\n    if (this.inMemory) {\n      this.memoryCache.delete(urlHash);\n      return;\n    }\n    \n    // Filesystem mode\n    const cachePath = path.join(this.cacheDir!, urlHash);\n    \n    try {\n      await fs.unlink(cachePath);\n      await fs.unlink(`${cachePath}.meta.json`);\n    } catch {\n      // Ignore if doesn't exist\n    }\n  }\n\n  /**\n   * Clear entire cache\n   */\n  async clear(): Promise<void> {\n    // Handle in-memory mode\n    if (this.inMemory) {\n      this.memoryCache.clear();\n      return;\n    }\n    \n    // Filesystem mode\n    try {\n      await fs.rm(this.cacheDir!, { recursive: true, force: true });\n    } catch {\n      // Ignore if doesn't exist\n    }\n  }\n\n  /**\n   * Get cache statistics\n   */\n  async getStats(): Promise<{\n    entries: number;\n    totalSize: number;\n    urls: string[];\n  }> {\n    // Handle in-memory mode\n    if (this.inMemory) {\n      let totalSize = 0;\n      const urls: string[] = [];\n      \n      for (const entry of this.memoryCache.values()) {\n        totalSize += entry.size;\n        urls.push(entry.url);\n      }\n      \n      return {\n        entries: this.memoryCache.size,\n        totalSize,\n        urls\n      };\n    }\n    \n    // Filesystem mode\n    try {\n      const files = await fs.readdir(this.cacheDir!);\n      const metaFiles = files.filter(f => f.endsWith('.meta.json'));\n      \n      let totalSize = 0;\n      const urls: string[] = [];\n      \n      for (const metaFile of metaFiles) {\n        const metaPath = path.join(this.cacheDir!, metaFile);\n        const metaContent = await fs.readFile(metaPath, 'utf8');\n        const meta = JSON.parse(metaContent);\n        \n        totalSize += meta.size || 0;\n        urls.push(meta.url);\n      }\n      \n      return {\n        entries: metaFiles.length,\n        totalSize,\n        urls\n      };\n    } catch {\n      return {\n        entries: 0,\n        totalSize: 0,\n        urls: []\n      };\n    }\n  }\n\n  private hashUrl(url: string): string {\n    return createHash('sha256').update(url, 'utf8').digest('hex');\n  }\n}"]}