{
  "version": 3,
  "sources": ["../../../../src/processors/file-processor.ts"],
  "sourcesContent": ["//\n// Copyright 2023 DXOS.org\n//\n\nimport { appendFileSync, mkdirSync, openSync } from 'node:fs';\nimport { dirname } from 'node:path';\n\nimport { type LogFilter, LogLevel } from '../config';\nimport { type LogProcessor, shouldLog } from '../context';\n\n// Amount of time to retry writing after encountering EAGAIN before giving up.\nconst EAGAIN_MAX_DURATION = 1000;\n\n/**\n * Create a file processor.\n * @param path - Path to log file to create or append to, or existing open file descriptor e.g. stdout.\n * @param levels - Log levels to process. Takes preference over Filters.\n * @param filters - Filters to apply.\n */\nexport const createFileProcessor = ({\n  pathOrFd,\n  levels,\n  filters,\n}: {\n  pathOrFd: string | number;\n  levels: LogLevel[];\n  filters?: LogFilter[];\n}): LogProcessor => {\n  let fd: number | undefined;\n\n  return (config, entry) => {\n    if (levels.length > 0 && !levels.includes(entry.level)) {\n      return;\n    }\n    if (!shouldLog(entry, filters)) {\n      return;\n    }\n\n    if (typeof pathOrFd === 'number') {\n      fd = pathOrFd;\n    } else {\n      try {\n        mkdirSync(dirname(pathOrFd));\n      } catch {}\n      fd = openSync(pathOrFd, 'a');\n    }\n\n    const record = {\n      level: entry.level,\n      message: entry.message,\n      timestamp: entry.timestamp,\n      meta: entry.computedMeta,\n      context: entry.computedContext,\n      error: entry.computedError,\n    };\n    let retryTS: number = 0;\n\n    // Retry writing if EAGAIN is encountered.\n    //\n    // Node may set stdout and stderr to non-blocking. https://github.com/nodejs/node/issues/42826\n    // This can cause EAGAIN errors when writing to them.\n    // In order to not drop logs, make log methods asynchronous, or deal with buffering/delayed writes, spin until write succeeds.\n\n    while (true) {\n      try {\n        return appendFileSync(fd, JSON.stringify(record) + '\\n');\n      } catch (err: any) {\n        if (err.code !== 'EAGAIN') {\n          throw err;\n        }\n        if (retryTS === 0) {\n          retryTS = performance.now();\n        } else {\n          if (performance.now() - retryTS > EAGAIN_MAX_DURATION) {\n            console.log(`could not write after ${EAGAIN_MAX_DURATION}ms of EAGAIN failures, giving up`);\n            throw err;\n          }\n        }\n      }\n    }\n  };\n};\n\nlet logFilePath: string | undefined;\nconst getLogFilePath = () => {\n  logFilePath ??=\n    process.env.LOG_FILE ??\n    (process.env.HOME ? `${process.env.HOME}/.dxlog/${new Date().toISOString()}.log` : undefined);\n\n  return logFilePath!;\n};\n\nexport const FILE_PROCESSOR: LogProcessor = createFileProcessor({\n  pathOrFd: getLogFilePath(),\n  levels: [LogLevel.ERROR, LogLevel.WARN, LogLevel.INFO, LogLevel.TRACE],\n});\n"],
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}