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Current File : //lib/node_modules/npm/node_modules/@npmcli/installed-package-contents/lib/index.js

// to GET CONTENTS for folder at PATH (which may be a PACKAGE):
// - if PACKAGE, read path/package.json
//   - if bins in ../node_modules/.bin, add those to result
// - if depth >= maxDepth, add PATH to result, and finish
// - readdir(PATH, with file types)
// - add all FILEs in PATH to result
// - if PARENT:
//   - if depth < maxDepth, add GET CONTENTS of all DIRs in PATH
//   - else, add all DIRs in PATH
// - if no parent
//   - if no bundled deps,
//     - if depth < maxDepth, add GET CONTENTS of DIRs in path except
//       node_modules
//     - else, add all DIRs in path other than node_modules
//   - if has bundled deps,
//     - get list of bundled deps
//     - add GET CONTENTS of bundled deps, PACKAGE=true, depth + 1

const bundled = require('npm-bundled')
const { readFile, readdir, stat } = require('fs/promises')
const { resolve, basename, dirname } = require('path')
const normalizePackageBin = require('npm-normalize-package-bin')

const readPackage = ({ path, packageJsonCache }) => packageJsonCache.has(path)
  ? Promise.resolve(packageJsonCache.get(path))
  : readFile(path).then(json => {
    const pkg = normalizePackageBin(JSON.parse(json))
    packageJsonCache.set(path, pkg)
    return pkg
  }).catch(() => null)

// just normalize bundle deps and bin, that's all we care about here.
const normalized = Symbol('package data has been normalized')
const rpj = ({ path, packageJsonCache }) => readPackage({ path, packageJsonCache })
  .then(pkg => {
    if (!pkg || pkg[normalized]) {
      return pkg
    }
    if (pkg.bundledDependencies && !pkg.bundleDependencies) {
      pkg.bundleDependencies = pkg.bundledDependencies
      delete pkg.bundledDependencies
    }
    const bd = pkg.bundleDependencies
    if (bd === true) {
      pkg.bundleDependencies = [
        ...Object.keys(pkg.dependencies || {}),
        ...Object.keys(pkg.optionalDependencies || {}),
      ]
    }
    if (typeof bd === 'object' && !Array.isArray(bd)) {
      pkg.bundleDependencies = Object.keys(bd)
    }
    pkg[normalized] = true
    return pkg
  })

const pkgContents = async ({
  path,
  depth = 1,
  currentDepth = 0,
  pkg = null,
  result = null,
  packageJsonCache = null,
}) => {
  if (!result) {
    result = new Set()
  }

  if (!packageJsonCache) {
    packageJsonCache = new Map()
  }

  if (pkg === true) {
    return rpj({ path: path + '/package.json', packageJsonCache })
      .then(p => pkgContents({
        path,
        depth,
        currentDepth,
        pkg: p,
        result,
        packageJsonCache,
      }))
  }

  if (pkg) {
    // add all bins to result if they exist
    if (pkg.bin) {
      const dir = dirname(path)
      const scope = basename(dir)
      const nm = /^@.+/.test(scope) ? dirname(dir) : dir

      const binFiles = []
      Object.keys(pkg.bin).forEach(b => {
        const base = resolve(nm, '.bin', b)
        binFiles.push(base, base + '.cmd', base + '.ps1')
      })

      const bins = await Promise.all(
        binFiles.map(b => stat(b).then(() => b).catch(() => null))
      )
      bins.filter(b => b).forEach(b => result.add(b))
    }
  }

  if (currentDepth >= depth) {
    result.add(path)
    return result
  }

  // we'll need bundle list later, so get that now in parallel
  const [dirEntries, bundleDeps] = await Promise.all([
    readdir(path, { withFileTypes: true }),
    currentDepth === 0 && pkg && pkg.bundleDependencies
      ? bundled({ path, packageJsonCache }) : null,
  ]).catch(() => [])

  // not a thing, probably a missing folder
  if (!dirEntries) {
    return result
  }

  // empty folder, just add the folder itself to the result
  if (!dirEntries.length && !bundleDeps && currentDepth !== 0) {
    result.add(path)
    return result
  }

  const recursePromises = []

  for (const entry of dirEntries) {
    const p = resolve(path, entry.name)
    if (entry.isDirectory() === false) {
      result.add(p)
      continue
    }

    if (currentDepth !== 0 || entry.name !== 'node_modules') {
      if (currentDepth < depth - 1) {
        recursePromises.push(pkgContents({
          path: p,
          packageJsonCache,
          depth,
          currentDepth: currentDepth + 1,
          result,
        }))
      } else {
        result.add(p)
      }
      continue
    }
  }

  if (bundleDeps) {
    // bundle deps are all folders
    // we always recurse to get pkg bins, but if currentDepth is too high,
    // it'll return early before walking their contents.
    recursePromises.push(...bundleDeps.map(dep => {
      const p = resolve(path, 'node_modules', dep)
      return pkgContents({
        path: p,
        packageJsonCache,
        pkg: true,
        depth,
        currentDepth: currentDepth + 1,
        result,
      })
    }))
  }

  if (recursePromises.length) {
    await Promise.all(recursePromises)
  }

  return result
}

module.exports = ({ path, ...opts }) => pkgContents({
  path: resolve(path),
  ...opts,
  pkg: true,
}).then(results => [...results])

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