\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/alt/alt-nodejs18/root/lib/node_modules/npm/node_modules.bundled/libnpmdiff/lib/

Viewing File: untar.js

const tar = require('tar')
const { minimatch } = require('minimatch')

const normalizeMatch = str => str
  .replace(/\\+/g, '/')
  .replace(/^\.\/|^\./, '')

// files and refs are mutating params
// filterFiles, item, prefix and opts are read-only options
const untar = ({ files, refs }, { filterFiles, item, prefix }) => {
  tar.list({
    filter: (path, entry) => {
      const fileMatch = () =>
        (!filterFiles.length ||
          filterFiles.some(f => {
            const pattern = normalizeMatch(f)
            return minimatch(
              normalizeMatch(path),
              `{package/,}${pattern}`,
              { matchBase: pattern.startsWith('*') }
            )
          }))

      // expands usage of simple path filters, e.g: lib or src/
      const folderMatch = () =>
        filterFiles.some(f =>
          normalizeMatch(path).startsWith(normalizeMatch(f)) ||
          normalizeMatch(path).startsWith(`package/${normalizeMatch(f)}`))

      if (
        entry.type === 'File' &&
        (fileMatch() || folderMatch())
      ) {
        const key = path.replace(/^[^/]+\/?/, '')
        files.add(key)

        // should skip reading file when using --name-only option
        let content
        try {
          entry.setEncoding('utf8')
          content = entry.concat()
        } catch (e) {
          /* istanbul ignore next */
          throw Object.assign(
            new Error('failed to read files'),
            { code: 'EDIFFUNTAR' }
          )
        }

        refs.set(`${prefix}${key}`, {
          content,
          mode: `100${entry.mode.toString(8)}`,
        })
        return true
      }
    },
  })
    .on('error', /* istanbul ignore next */ e => {
      throw e
    })
    .end(item)
}

const readTarballs = async (tarballs, opts = {}) => {
  const files = new Set()
  const refs = new Map()
  const arr = [].concat(tarballs)

  const filterFiles = opts.diffFiles || []

  for (const i of arr) {
    untar({
      files,
      refs,
    }, {
      item: i.item,
      prefix: i.prefix,
      filterFiles,
    })
  }

  // await to read all content from included files
  const allRefs = [...refs.values()]
  const contents = await Promise.all(allRefs.map(async ref => ref.content))

  contents.forEach((content, index) => {
    allRefs[index].content = content
  })

  return {
    files,
    refs,
  }
}

module.exports = readTarballs