fs metadata.ts

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  import * as semver from './semver'
import { SemVer } from './semver'
 
export type UnixFileMode = number
 
export enum UnixNodeType {
  Raw = 'raw',
  Directory = 'dir',
  File = 'file',
  Metadata = 'metadata',
  Symlink = 'symlink',
  HAMTShard = 'hamtShard',
}
 
export type UnixMeta = { 
  mtime: number
  ctime: number
  mode: UnixFileMode
  _type: string
}
 
export type Metadata = {
  unixMeta: UnixMeta
  isFile: boolean
  version: SemVer
}
 
export const emptyUnix = (isFile: boolean): UnixMeta => ({
  mtime: Date.now(),
  ctime: Date.now(),
  mode: isFile ? 644 : 755,
  _type: isFile ? UnixNodeType.File : UnixNodeType.Directory,
})
 
export const empty = (isFile: boolean): Metadata => ({
  isFile,
  version: semver.latest,
  unixMeta: emptyUnix(isFile)
})
 
export const updateMtime = (metadata: Metadata): Metadata => ({
  ...metadata,
  unixMeta: {
    ...metadata.unixMeta,
    mtime: Date.now()
  }
})