* first action! (#1)

node_modules/cacache/lib/content/path.js

@@ -0,0 +1,26 @@
+'use strict'
+
+const contentVer = require('../../package.json')['cache-version'].content
+const hashToSegments = require('../util/hash-to-segments')
+const path = require('path')
+const ssri = require('ssri')
+
+// Current format of content file path:
+//
+// sha512-BaSE64Hex= ->
+// ~/.my-cache/content-v2/sha512/ba/da/55deadbeefc0ffee
+//
+module.exports = contentPath
+function contentPath (cache, integrity) {
+  const sri = ssri.parse(integrity, { single: true })
+  // contentPath is the *strongest* algo given
+  return path.join.apply(path, [
+    contentDir(cache),
+    sri.algorithm
+  ].concat(hashToSegments(sri.hexDigest())))
+}
+
+module.exports._contentDir = contentDir
+function contentDir (cache) {
+  return path.join(cache, `content-v${contentVer}`)
+}

node_modules/cacache/lib/content/read.js

@@ -0,0 +1,195 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const contentPath = require('./path')
+const figgyPudding = require('figgy-pudding')
+const fs = require('graceful-fs')
+const PassThrough = require('stream').PassThrough
+const pipe = BB.promisify(require('mississippi').pipe)
+const ssri = require('ssri')
+const Y = require('../util/y.js')
+
+const lstatAsync = BB.promisify(fs.lstat)
+const readFileAsync = BB.promisify(fs.readFile)
+
+const ReadOpts = figgyPudding({
+  size: {}
+})
+
+module.exports = read
+function read (cache, integrity, opts) {
+  opts = ReadOpts(opts)
+  return withContentSri(cache, integrity, (cpath, sri) => {
+    return readFileAsync(cpath, null).then(data => {
+      if (typeof opts.size === 'number' && opts.size !== data.length) {
+        throw sizeError(opts.size, data.length)
+      } else if (ssri.checkData(data, sri)) {
+        return data
+      } else {
+        throw integrityError(sri, cpath)
+      }
+    })
+  })
+}
+
+module.exports.sync = readSync
+function readSync (cache, integrity, opts) {
+  opts = ReadOpts(opts)
+  return withContentSriSync(cache, integrity, (cpath, sri) => {
+    const data = fs.readFileSync(cpath)
+    if (typeof opts.size === 'number' && opts.size !== data.length) {
+      throw sizeError(opts.size, data.length)
+    } else if (ssri.checkData(data, sri)) {
+      return data
+    } else {
+      throw integrityError(sri, cpath)
+    }
+  })
+}
+
+module.exports.stream = readStream
+module.exports.readStream = readStream
+function readStream (cache, integrity, opts) {
+  opts = ReadOpts(opts)
+  const stream = new PassThrough()
+  withContentSri(cache, integrity, (cpath, sri) => {
+    return lstatAsync(cpath).then(stat => ({ cpath, sri, stat }))
+  }).then(({ cpath, sri, stat }) => {
+    return pipe(
+      fs.createReadStream(cpath),
+      ssri.integrityStream({
+        integrity: sri,
+        size: opts.size
+      }),
+      stream
+    )
+  }).catch(err => {
+    stream.emit('error', err)
+  })
+  return stream
+}
+
+let copyFileAsync
+if (fs.copyFile) {
+  module.exports.copy = copy
+  module.exports.copy.sync = copySync
+  copyFileAsync = BB.promisify(fs.copyFile)
+}
+
+function copy (cache, integrity, dest, opts) {
+  opts = ReadOpts(opts)
+  return withContentSri(cache, integrity, (cpath, sri) => {
+    return copyFileAsync(cpath, dest)
+  })
+}
+
+function copySync (cache, integrity, dest, opts) {
+  opts = ReadOpts(opts)
+  return withContentSriSync(cache, integrity, (cpath, sri) => {
+    return fs.copyFileSync(cpath, dest)
+  })
+}
+
+module.exports.hasContent = hasContent
+function hasContent (cache, integrity) {
+  if (!integrity) { return BB.resolve(false) }
+  return withContentSri(cache, integrity, (cpath, sri) => {
+    return lstatAsync(cpath).then(stat => ({ size: stat.size, sri, stat }))
+  }).catch(err => {
+    if (err.code === 'ENOENT') { return false }
+    if (err.code === 'EPERM') {
+      if (process.platform !== 'win32') {
+        throw err
+      } else {
+        return false
+      }
+    }
+  })
+}
+
+module.exports.hasContent.sync = hasContentSync
+function hasContentSync (cache, integrity) {
+  if (!integrity) { return false }
+  return withContentSriSync(cache, integrity, (cpath, sri) => {
+    try {
+      const stat = fs.lstatSync(cpath)
+      return { size: stat.size, sri, stat }
+    } catch (err) {
+      if (err.code === 'ENOENT') { return false }
+      if (err.code === 'EPERM') {
+        if (process.platform !== 'win32') {
+          throw err
+        } else {
+          return false
+        }
+      }
+    }
+  })
+}
+
+function withContentSri (cache, integrity, fn) {
+  return BB.try(() => {
+    const sri = ssri.parse(integrity)
+    // If `integrity` has multiple entries, pick the first digest
+    // with available local data.
+    const algo = sri.pickAlgorithm()
+    const digests = sri[algo]
+    if (digests.length <= 1) {
+      const cpath = contentPath(cache, digests[0])
+      return fn(cpath, digests[0])
+    } else {
+      return BB.any(sri[sri.pickAlgorithm()].map(meta => {
+        return withContentSri(cache, meta, fn)
+      }, { concurrency: 1 }))
+        .catch(err => {
+          if ([].some.call(err, e => e.code === 'ENOENT')) {
+            throw Object.assign(
+              new Error('No matching content found for ' + sri.toString()),
+              { code: 'ENOENT' }
+            )
+          } else {
+            throw err[0]
+          }
+        })
+    }
+  })
+}
+
+function withContentSriSync (cache, integrity, fn) {
+  const sri = ssri.parse(integrity)
+  // If `integrity` has multiple entries, pick the first digest
+  // with available local data.
+  const algo = sri.pickAlgorithm()
+  const digests = sri[algo]
+  if (digests.length <= 1) {
+    const cpath = contentPath(cache, digests[0])
+    return fn(cpath, digests[0])
+  } else {
+    let lastErr = null
+    for (const meta of sri[sri.pickAlgorithm()]) {
+      try {
+        return withContentSriSync(cache, meta, fn)
+      } catch (err) {
+        lastErr = err
+      }
+    }
+    if (lastErr) { throw lastErr }
+  }
+}
+
+function sizeError (expected, found) {
+  var err = new Error(Y`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`)
+  err.expected = expected
+  err.found = found
+  err.code = 'EBADSIZE'
+  return err
+}
+
+function integrityError (sri, path) {
+  var err = new Error(Y`Integrity verification failed for ${sri} (${path})`)
+  err.code = 'EINTEGRITY'
+  err.sri = sri
+  err.path = path
+  return err
+}

node_modules/cacache/lib/content/rm.js

@@ -0,0 +1,21 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const contentPath = require('./path')
+const hasContent = require('./read').hasContent
+const rimraf = BB.promisify(require('rimraf'))
+
+module.exports = rm
+function rm (cache, integrity) {
+  return hasContent(cache, integrity).then(content => {
+    if (content) {
+      const sri = content.sri
+      if (sri) {
+        return rimraf(contentPath(cache, sri)).then(() => true)
+      }
+    } else {
+      return false
+    }
+  })
+}

node_modules/cacache/lib/content/write.js

@@ -0,0 +1,164 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const contentPath = require('./path')
+const fixOwner = require('../util/fix-owner')
+const fs = require('graceful-fs')
+const moveFile = require('../util/move-file')
+const PassThrough = require('stream').PassThrough
+const path = require('path')
+const pipe = BB.promisify(require('mississippi').pipe)
+const rimraf = BB.promisify(require('rimraf'))
+const ssri = require('ssri')
+const to = require('mississippi').to
+const uniqueFilename = require('unique-filename')
+const Y = require('../util/y.js')
+
+const writeFileAsync = BB.promisify(fs.writeFile)
+
+module.exports = write
+function write (cache, data, opts) {
+  opts = opts || {}
+  if (opts.algorithms && opts.algorithms.length > 1) {
+    throw new Error(
+      Y`opts.algorithms only supports a single algorithm for now`
+    )
+  }
+  if (typeof opts.size === 'number' && data.length !== opts.size) {
+    return BB.reject(sizeError(opts.size, data.length))
+  }
+  const sri = ssri.fromData(data, {
+    algorithms: opts.algorithms
+  })
+  if (opts.integrity && !ssri.checkData(data, opts.integrity, opts)) {
+    return BB.reject(checksumError(opts.integrity, sri))
+  }
+  return BB.using(makeTmp(cache, opts), tmp => (
+    writeFileAsync(
+      tmp.target, data, { flag: 'wx' }
+    ).then(() => (
+      moveToDestination(tmp, cache, sri, opts)
+    ))
+  )).then(() => ({ integrity: sri, size: data.length }))
+}
+
+module.exports.stream = writeStream
+function writeStream (cache, opts) {
+  opts = opts || {}
+  const inputStream = new PassThrough()
+  let inputErr = false
+  function errCheck () {
+    if (inputErr) { throw inputErr }
+  }
+
+  let allDone
+  const ret = to((c, n, cb) => {
+    if (!allDone) {
+      allDone = handleContent(inputStream, cache, opts, errCheck)
+    }
+    inputStream.write(c, n, cb)
+  }, cb => {
+    inputStream.end(() => {
+      if (!allDone) {
+        const e = new Error(Y`Cache input stream was empty`)
+        e.code = 'ENODATA'
+        return ret.emit('error', e)
+      }
+      allDone.then(res => {
+        res.integrity && ret.emit('integrity', res.integrity)
+        res.size !== null && ret.emit('size', res.size)
+        cb()
+      }, e => {
+        ret.emit('error', e)
+      })
+    })
+  })
+  ret.once('error', e => {
+    inputErr = e
+  })
+  return ret
+}
+
+function handleContent (inputStream, cache, opts, errCheck) {
+  return BB.using(makeTmp(cache, opts), tmp => {
+    errCheck()
+    return pipeToTmp(
+      inputStream, cache, tmp.target, opts, errCheck
+    ).then(res => {
+      return moveToDestination(
+        tmp, cache, res.integrity, opts, errCheck
+      ).then(() => res)
+    })
+  })
+}
+
+function pipeToTmp (inputStream, cache, tmpTarget, opts, errCheck) {
+  return BB.resolve().then(() => {
+    let integrity
+    let size
+    const hashStream = ssri.integrityStream({
+      integrity: opts.integrity,
+      algorithms: opts.algorithms,
+      size: opts.size
+    }).on('integrity', s => {
+      integrity = s
+    }).on('size', s => {
+      size = s
+    })
+    const outStream = fs.createWriteStream(tmpTarget, {
+      flags: 'wx'
+    })
+    errCheck()
+    return pipe(inputStream, hashStream, outStream).then(() => {
+      return { integrity, size }
+    }).catch(err => {
+      return rimraf(tmpTarget).then(() => { throw err })
+    })
+  })
+}
+
+function makeTmp (cache, opts) {
+  const tmpTarget = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix)
+  return fixOwner.mkdirfix(
+    cache, path.dirname(tmpTarget)
+  ).then(() => ({
+    target: tmpTarget,
+    moved: false
+  })).disposer(tmp => (!tmp.moved && rimraf(tmp.target)))
+}
+
+function moveToDestination (tmp, cache, sri, opts, errCheck) {
+  errCheck && errCheck()
+  const destination = contentPath(cache, sri)
+  const destDir = path.dirname(destination)
+
+  return fixOwner.mkdirfix(
+    cache, destDir
+  ).then(() => {
+    errCheck && errCheck()
+    return moveFile(tmp.target, destination)
+  }).then(() => {
+    errCheck && errCheck()
+    tmp.moved = true
+    return fixOwner.chownr(cache, destination)
+  })
+}
+
+function sizeError (expected, found) {
+  var err = new Error(Y`Bad data size: expected inserted data to be ${expected} bytes, but got ${found} instead`)
+  err.expected = expected
+  err.found = found
+  err.code = 'EBADSIZE'
+  return err
+}
+
+function checksumError (expected, found) {
+  var err = new Error(Y`Integrity check failed:
+  Wanted: ${expected}
+   Found: ${found}`)
+  err.code = 'EINTEGRITY'
+  err.expected = expected
+  err.found = found
+  return err
+}

node_modules/cacache/lib/entry-index.js

@@ -0,0 +1,288 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const contentPath = require('./content/path')
+const crypto = require('crypto')
+const figgyPudding = require('figgy-pudding')
+const fixOwner = require('./util/fix-owner')
+const fs = require('graceful-fs')
+const hashToSegments = require('./util/hash-to-segments')
+const ms = require('mississippi')
+const path = require('path')
+const ssri = require('ssri')
+const Y = require('./util/y.js')
+
+const indexV = require('../package.json')['cache-version'].index
+
+const appendFileAsync = BB.promisify(fs.appendFile)
+const readFileAsync = BB.promisify(fs.readFile)
+const readdirAsync = BB.promisify(fs.readdir)
+const concat = ms.concat
+const from = ms.from
+
+module.exports.NotFoundError = class NotFoundError extends Error {
+  constructor (cache, key) {
+    super(Y`No cache entry for \`${key}\` found in \`${cache}\``)
+    this.code = 'ENOENT'
+    this.cache = cache
+    this.key = key
+  }
+}
+
+const IndexOpts = figgyPudding({
+  metadata: {},
+  size: {}
+})
+
+module.exports.insert = insert
+function insert (cache, key, integrity, opts) {
+  opts = IndexOpts(opts)
+  const bucket = bucketPath(cache, key)
+  const entry = {
+    key,
+    integrity: integrity && ssri.stringify(integrity),
+    time: Date.now(),
+    size: opts.size,
+    metadata: opts.metadata
+  }
+  return fixOwner.mkdirfix(
+    cache, path.dirname(bucket)
+  ).then(() => {
+    const stringified = JSON.stringify(entry)
+    // NOTE - Cleverness ahoy!
+    //
+    // This works because it's tremendously unlikely for an entry to corrupt
+    // another while still preserving the string length of the JSON in
+    // question. So, we just slap the length in there and verify it on read.
+    //
+    // Thanks to @isaacs for the whiteboarding session that ended up with this.
+    return appendFileAsync(
+      bucket, `\n${hashEntry(stringified)}\t${stringified}`
+    )
+  }).then(
+    () => fixOwner.chownr(cache, bucket)
+  ).catch({ code: 'ENOENT' }, () => {
+    // There's a class of race conditions that happen when things get deleted
+    // during fixOwner, or between the two mkdirfix/chownr calls.
+    //
+    // It's perfectly fine to just not bother in those cases and lie
+    // that the index entry was written. Because it's a cache.
+  }).then(() => {
+    return formatEntry(cache, entry)
+  })
+}
+
+module.exports.insert.sync = insertSync
+function insertSync (cache, key, integrity, opts) {
+  opts = IndexOpts(opts)
+  const bucket = bucketPath(cache, key)
+  const entry = {
+    key,
+    integrity: integrity && ssri.stringify(integrity),
+    time: Date.now(),
+    size: opts.size,
+    metadata: opts.metadata
+  }
+  fixOwner.mkdirfix.sync(cache, path.dirname(bucket))
+  const stringified = JSON.stringify(entry)
+  fs.appendFileSync(
+    bucket, `\n${hashEntry(stringified)}\t${stringified}`
+  )
+  try {
+    fixOwner.chownr.sync(cache, bucket)
+  } catch (err) {
+    if (err.code !== 'ENOENT') {
+      throw err
+    }
+  }
+  return formatEntry(cache, entry)
+}
+
+module.exports.find = find
+function find (cache, key) {
+  const bucket = bucketPath(cache, key)
+  return bucketEntries(bucket).then(entries => {
+    return entries.reduce((latest, next) => {
+      if (next && next.key === key) {
+        return formatEntry(cache, next)
+      } else {
+        return latest
+      }
+    }, null)
+  }).catch(err => {
+    if (err.code === 'ENOENT') {
+      return null
+    } else {
+      throw err
+    }
+  })
+}
+
+module.exports.find.sync = findSync
+function findSync (cache, key) {
+  const bucket = bucketPath(cache, key)
+  try {
+    return bucketEntriesSync(bucket).reduce((latest, next) => {
+      if (next && next.key === key) {
+        return formatEntry(cache, next)
+      } else {
+        return latest
+      }
+    }, null)
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      return null
+    } else {
+      throw err
+    }
+  }
+}
+
+module.exports.delete = del
+function del (cache, key, opts) {
+  return insert(cache, key, null, opts)
+}
+
+module.exports.delete.sync = delSync
+function delSync (cache, key, opts) {
+  return insertSync(cache, key, null, opts)
+}
+
+module.exports.lsStream = lsStream
+function lsStream (cache) {
+  const indexDir = bucketDir(cache)
+  const stream = from.obj()
+
+  // "/cachename/*"
+  readdirOrEmpty(indexDir).map(bucket => {
+    const bucketPath = path.join(indexDir, bucket)
+
+    // "/cachename/<bucket 0xFF>/*"
+    return readdirOrEmpty(bucketPath).map(subbucket => {
+      const subbucketPath = path.join(bucketPath, subbucket)
+
+      // "/cachename/<bucket 0xFF>/<bucket 0xFF>/*"
+      return readdirOrEmpty(subbucketPath).map(entry => {
+        const getKeyToEntry = bucketEntries(
+          path.join(subbucketPath, entry)
+        ).reduce((acc, entry) => {
+          acc.set(entry.key, entry)
+          return acc
+        }, new Map())
+
+        return getKeyToEntry.then(reduced => {
+          for (let entry of reduced.values()) {
+            const formatted = formatEntry(cache, entry)
+            formatted && stream.push(formatted)
+          }
+        }).catch({ code: 'ENOENT' }, nop)
+      })
+    })
+  }).then(() => {
+    stream.push(null)
+  }, err => {
+    stream.emit('error', err)
+  })
+
+  return stream
+}
+
+module.exports.ls = ls
+function ls (cache) {
+  return BB.fromNode(cb => {
+    lsStream(cache).on('error', cb).pipe(concat(entries => {
+      cb(null, entries.reduce((acc, xs) => {
+        acc[xs.key] = xs
+        return acc
+      }, {}))
+    }))
+  })
+}
+
+function bucketEntries (bucket, filter) {
+  return readFileAsync(
+    bucket, 'utf8'
+  ).then(data => _bucketEntries(data, filter))
+}
+
+function bucketEntriesSync (bucket, filter) {
+  const data = fs.readFileSync(bucket, 'utf8')
+  return _bucketEntries(data, filter)
+}
+
+function _bucketEntries (data, filter) {
+  let entries = []
+  data.split('\n').forEach(entry => {
+    if (!entry) { return }
+    const pieces = entry.split('\t')
+    if (!pieces[1] || hashEntry(pieces[1]) !== pieces[0]) {
+      // Hash is no good! Corruption or malice? Doesn't matter!
+      // EJECT EJECT
+      return
+    }
+    let obj
+    try {
+      obj = JSON.parse(pieces[1])
+    } catch (e) {
+      // Entry is corrupted!
+      return
+    }
+    if (obj) {
+      entries.push(obj)
+    }
+  })
+  return entries
+}
+
+module.exports._bucketDir = bucketDir
+function bucketDir (cache) {
+  return path.join(cache, `index-v${indexV}`)
+}
+
+module.exports._bucketPath = bucketPath
+function bucketPath (cache, key) {
+  const hashed = hashKey(key)
+  return path.join.apply(path, [bucketDir(cache)].concat(
+    hashToSegments(hashed)
+  ))
+}
+
+module.exports._hashKey = hashKey
+function hashKey (key) {
+  return hash(key, 'sha256')
+}
+
+module.exports._hashEntry = hashEntry
+function hashEntry (str) {
+  return hash(str, 'sha1')
+}
+
+function hash (str, digest) {
+  return crypto
+    .createHash(digest)
+    .update(str)
+    .digest('hex')
+}
+
+function formatEntry (cache, entry) {
+  // Treat null digests as deletions. They'll shadow any previous entries.
+  if (!entry.integrity) { return null }
+  return {
+    key: entry.key,
+    integrity: entry.integrity,
+    path: contentPath(cache, entry.integrity),
+    size: entry.size,
+    time: entry.time,
+    metadata: entry.metadata
+  }
+}
+
+function readdirOrEmpty (dir) {
+  return readdirAsync(dir)
+    .catch({ code: 'ENOENT' }, () => [])
+    .catch({ code: 'ENOTDIR' }, () => [])
+}
+
+function nop () {
+}

node_modules/cacache/lib/memoization.js

@@ -0,0 +1,69 @@
+'use strict'
+
+const LRU = require('lru-cache')
+
+const MAX_SIZE = 50 * 1024 * 1024 // 50MB
+const MAX_AGE = 3 * 60 * 1000
+
+let MEMOIZED = new LRU({
+  max: MAX_SIZE,
+  maxAge: MAX_AGE,
+  length: (entry, key) => {
+    if (key.startsWith('key:')) {
+      return entry.data.length
+    } else if (key.startsWith('digest:')) {
+      return entry.length
+    }
+  }
+})
+
+module.exports.clearMemoized = clearMemoized
+function clearMemoized () {
+  const old = {}
+  MEMOIZED.forEach((v, k) => {
+    old[k] = v
+  })
+  MEMOIZED.reset()
+  return old
+}
+
+module.exports.put = put
+function put (cache, entry, data, opts) {
+  pickMem(opts).set(`key:${cache}:${entry.key}`, { entry, data })
+  putDigest(cache, entry.integrity, data, opts)
+}
+
+module.exports.put.byDigest = putDigest
+function putDigest (cache, integrity, data, opts) {
+  pickMem(opts).set(`digest:${cache}:${integrity}`, data)
+}
+
+module.exports.get = get
+function get (cache, key, opts) {
+  return pickMem(opts).get(`key:${cache}:${key}`)
+}
+
+module.exports.get.byDigest = getDigest
+function getDigest (cache, integrity, opts) {
+  return pickMem(opts).get(`digest:${cache}:${integrity}`)
+}
+
+class ObjProxy {
+  constructor (obj) {
+    this.obj = obj
+  }
+  get (key) { return this.obj[key] }
+  set (key, val) { this.obj[key] = val }
+}
+
+function pickMem (opts) {
+  if (!opts || !opts.memoize) {
+    return MEMOIZED
+  } else if (opts.memoize.get && opts.memoize.set) {
+    return opts.memoize
+  } else if (typeof opts.memoize === 'object') {
+    return new ObjProxy(opts.memoize)
+  } else {
+    return MEMOIZED
+  }
+}

node_modules/cacache/lib/util/fix-owner.js

@@ -0,0 +1,128 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const chownr = BB.promisify(require('chownr'))
+const mkdirp = BB.promisify(require('mkdirp'))
+const inflight = require('promise-inflight')
+const inferOwner = require('infer-owner')
+
+// Memoize getuid()/getgid() calls.
+// patch process.setuid/setgid to invalidate cached value on change
+const self = { uid: null, gid: null }
+const getSelf = () => {
+  if (typeof self.uid !== 'number') {
+    self.uid = process.getuid()
+    const setuid = process.setuid
+    process.setuid = (uid) => {
+      self.uid = null
+      process.setuid = setuid
+      return process.setuid(uid)
+    }
+  }
+  if (typeof self.gid !== 'number') {
+    self.gid = process.getgid()
+    const setgid = process.setgid
+    process.setgid = (gid) => {
+      self.gid = null
+      process.setgid = setgid
+      return process.setgid(gid)
+    }
+  }
+}
+
+module.exports.chownr = fixOwner
+function fixOwner (cache, filepath) {
+  if (!process.getuid) {
+    // This platform doesn't need ownership fixing
+    return BB.resolve()
+  }
+
+  getSelf()
+  if (self.uid !== 0) {
+    // almost certainly can't chown anyway
+    return BB.resolve()
+  }
+
+  return BB.resolve(inferOwner(cache)).then(owner => {
+    const { uid, gid } = owner
+
+    // No need to override if it's already what we used.
+    if (self.uid === uid && self.gid === gid) {
+      return
+    }
+
+    return inflight(
+      'fixOwner: fixing ownership on ' + filepath,
+      () => chownr(
+        filepath,
+        typeof uid === 'number' ? uid : self.uid,
+        typeof gid === 'number' ? gid : self.gid
+      ).catch({ code: 'ENOENT' }, () => null)
+    )
+  })
+}
+
+module.exports.chownr.sync = fixOwnerSync
+function fixOwnerSync (cache, filepath) {
+  if (!process.getuid) {
+    // This platform doesn't need ownership fixing
+    return
+  }
+  const { uid, gid } = inferOwner.sync(cache)
+  getSelf()
+  if (self.uid === uid && self.gid === gid) {
+    // No need to override if it's already what we used.
+    return
+  }
+  try {
+    chownr.sync(
+      filepath,
+      typeof uid === 'number' ? uid : self.uid,
+      typeof gid === 'number' ? gid : self.gid
+    )
+  } catch (err) {
+    // only catch ENOENT, any other error is a problem.
+    if (err.code === 'ENOENT') {
+      return null
+    }
+    throw err
+  }
+}
+
+module.exports.mkdirfix = mkdirfix
+function mkdirfix (cache, p, cb) {
+  // we have to infer the owner _before_ making the directory, even though
+  // we aren't going to use the results, since the cache itself might not
+  // exist yet.  If we mkdirp it, then our current uid/gid will be assumed
+  // to be correct if it creates the cache folder in the process.
+  return BB.resolve(inferOwner(cache)).then(() => {
+    return mkdirp(p).then(made => {
+      if (made) {
+        return fixOwner(cache, made).then(() => made)
+      }
+    }).catch({ code: 'EEXIST' }, () => {
+      // There's a race in mkdirp!
+      return fixOwner(cache, p).then(() => null)
+    })
+  })
+}
+
+module.exports.mkdirfix.sync = mkdirfixSync
+function mkdirfixSync (cache, p) {
+  try {
+    inferOwner.sync(cache)
+    const made = mkdirp.sync(p)
+    if (made) {
+      fixOwnerSync(cache, made)
+      return made
+    }
+  } catch (err) {
+    if (err.code === 'EEXIST') {
+      fixOwnerSync(cache, p)
+      return null
+    } else {
+      throw err
+    }
+  }
+}

node_modules/cacache/lib/util/hash-to-segments.js

@@ -0,0 +1,11 @@
+'use strict'
+
+module.exports = hashToSegments
+
+function hashToSegments (hash) {
+  return [
+    hash.slice(0, 2),
+    hash.slice(2, 4),
+    hash.slice(4)
+  ]
+}

node_modules/cacache/lib/util/move-file.js

@@ -0,0 +1,51 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const BB = require('bluebird')
+const chmod = BB.promisify(fs.chmod)
+const unlink = BB.promisify(fs.unlink)
+let move
+let pinflight
+
+module.exports = moveFile
+function moveFile (src, dest) {
+  // This isn't quite an fs.rename -- the assumption is that
+  // if `dest` already exists, and we get certain errors while
+  // trying to move it, we should just not bother.
+  //
+  // In the case of cache corruption, users will receive an
+  // EINTEGRITY error elsewhere, and can remove the offending
+  // content their own way.
+  //
+  // Note that, as the name suggests, this strictly only supports file moves.
+  return BB.fromNode(cb => {
+    fs.link(src, dest, err => {
+      if (err) {
+        if (err.code === 'EEXIST' || err.code === 'EBUSY') {
+          // file already exists, so whatever
+        } else if (err.code === 'EPERM' && process.platform === 'win32') {
+          // file handle stayed open even past graceful-fs limits
+        } else {
+          return cb(err)
+        }
+      }
+      return cb()
+    })
+  }).then(() => {
+    // content should never change for any reason, so make it read-only
+    return BB.join(unlink(src), process.platform !== 'win32' && chmod(dest, '0444'))
+  }).catch(() => {
+    if (!pinflight) { pinflight = require('promise-inflight') }
+    return pinflight('cacache-move-file:' + dest, () => {
+      return BB.promisify(fs.stat)(dest).catch(err => {
+        if (err.code !== 'ENOENT') {
+          // Something else is wrong here. Bail bail bail
+          throw err
+        }
+        // file doesn't already exist! let's try a rename -> copy fallback
+        if (!move) { move = require('move-concurrently') }
+        return move(src, dest, { BB, fs })
+      })
+    })
+  })
+}

node_modules/cacache/lib/util/tmp.js

@@ -0,0 +1,37 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const figgyPudding = require('figgy-pudding')
+const fixOwner = require('./fix-owner')
+const path = require('path')
+const rimraf = BB.promisify(require('rimraf'))
+const uniqueFilename = require('unique-filename')
+
+const TmpOpts = figgyPudding({
+  tmpPrefix: {}
+})
+
+module.exports.mkdir = mktmpdir
+function mktmpdir (cache, opts) {
+  opts = TmpOpts(opts)
+  const tmpTarget = uniqueFilename(path.join(cache, 'tmp'), opts.tmpPrefix)
+  return fixOwner.mkdirfix(cache, tmpTarget).then(() => {
+    return tmpTarget
+  })
+}
+
+module.exports.withTmp = withTmp
+function withTmp (cache, opts, cb) {
+  if (!cb) {
+    cb = opts
+    opts = null
+  }
+  opts = TmpOpts(opts)
+  return BB.using(mktmpdir(cache, opts).disposer(rimraf), cb)
+}
+
+module.exports.fix = fixtmpdir
+function fixtmpdir (cache) {
+  return fixOwner(cache, path.join(cache, 'tmp'))
+}

node_modules/cacache/lib/util/y.js

@@ -0,0 +1,25 @@
+'use strict'
+
+const path = require('path')
+const y18n = require('y18n')({
+  directory: path.join(__dirname, '../../locales'),
+  locale: 'en',
+  updateFiles: process.env.CACACHE_UPDATE_LOCALE_FILES === 'true'
+})
+
+module.exports = yTag
+function yTag (parts) {
+  let str = ''
+  parts.forEach((part, i) => {
+    const arg = arguments[i + 1]
+    str += part
+    if (arg) {
+      str += '%s'
+    }
+  })
+  return y18n.__.apply(null, [str].concat([].slice.call(arguments, 1)))
+}
+
+module.exports.setLocale = locale => {
+  y18n.setLocale(locale)
+}

node_modules/cacache/lib/verify.js

@@ -0,0 +1,227 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const contentPath = require('./content/path')
+const figgyPudding = require('figgy-pudding')
+const finished = BB.promisify(require('mississippi').finished)
+const fixOwner = require('./util/fix-owner')
+const fs = require('graceful-fs')
+const glob = BB.promisify(require('glob'))
+const index = require('./entry-index')
+const path = require('path')
+const rimraf = BB.promisify(require('rimraf'))
+const ssri = require('ssri')
+
+BB.promisifyAll(fs)
+
+const VerifyOpts = figgyPudding({
+  concurrency: {
+    default: 20
+  },
+  filter: {},
+  log: {
+    default: { silly () {} }
+  }
+})
+
+module.exports = verify
+function verify (cache, opts) {
+  opts = VerifyOpts(opts)
+  opts.log.silly('verify', 'verifying cache at', cache)
+  return BB.reduce([
+    markStartTime,
+    fixPerms,
+    garbageCollect,
+    rebuildIndex,
+    cleanTmp,
+    writeVerifile,
+    markEndTime
+  ], (stats, step, i) => {
+    const label = step.name || `step #${i}`
+    const start = new Date()
+    return BB.resolve(step(cache, opts)).then(s => {
+      s && Object.keys(s).forEach(k => {
+        stats[k] = s[k]
+      })
+      const end = new Date()
+      if (!stats.runTime) { stats.runTime = {} }
+      stats.runTime[label] = end - start
+      return stats
+    })
+  }, {}).tap(stats => {
+    stats.runTime.total = stats.endTime - stats.startTime
+    opts.log.silly('verify', 'verification finished for', cache, 'in', `${stats.runTime.total}ms`)
+  })
+}
+
+function markStartTime (cache, opts) {
+  return { startTime: new Date() }
+}
+
+function markEndTime (cache, opts) {
+  return { endTime: new Date() }
+}
+
+function fixPerms (cache, opts) {
+  opts.log.silly('verify', 'fixing cache permissions')
+  return fixOwner.mkdirfix(cache, cache).then(() => {
+    // TODO - fix file permissions too
+    return fixOwner.chownr(cache, cache)
+  }).then(() => null)
+}
+
+// Implements a naive mark-and-sweep tracing garbage collector.
+//
+// The algorithm is basically as follows:
+// 1. Read (and filter) all index entries ("pointers")
+// 2. Mark each integrity value as "live"
+// 3. Read entire filesystem tree in `content-vX/` dir
+// 4. If content is live, verify its checksum and delete it if it fails
+// 5. If content is not marked as live, rimraf it.
+//
+function garbageCollect (cache, opts) {
+  opts.log.silly('verify', 'garbage collecting content')
+  const indexStream = index.lsStream(cache)
+  const liveContent = new Set()
+  indexStream.on('data', entry => {
+    if (opts.filter && !opts.filter(entry)) { return }
+    liveContent.add(entry.integrity.toString())
+  })
+  return finished(indexStream).then(() => {
+    const contentDir = contentPath._contentDir(cache)
+    return glob(path.join(contentDir, '**'), {
+      follow: false,
+      nodir: true,
+      nosort: true
+    }).then(files => {
+      return BB.resolve({
+        verifiedContent: 0,
+        reclaimedCount: 0,
+        reclaimedSize: 0,
+        badContentCount: 0,
+        keptSize: 0
+      }).tap((stats) => BB.map(files, (f) => {
+        const split = f.split(/[/\\]/)
+        const digest = split.slice(split.length - 3).join('')
+        const algo = split[split.length - 4]
+        const integrity = ssri.fromHex(digest, algo)
+        if (liveContent.has(integrity.toString())) {
+          return verifyContent(f, integrity).then(info => {
+            if (!info.valid) {
+              stats.reclaimedCount++
+              stats.badContentCount++
+              stats.reclaimedSize += info.size
+            } else {
+              stats.verifiedContent++
+              stats.keptSize += info.size
+            }
+            return stats
+          })
+        } else {
+          // No entries refer to this content. We can delete.
+          stats.reclaimedCount++
+          return fs.statAsync(f).then(s => {
+            return rimraf(f).then(() => {
+              stats.reclaimedSize += s.size
+              return stats
+            })
+          })
+        }
+      }, { concurrency: opts.concurrency }))
+    })
+  })
+}
+
+function verifyContent (filepath, sri) {
+  return fs.statAsync(filepath).then(stat => {
+    const contentInfo = {
+      size: stat.size,
+      valid: true
+    }
+    return ssri.checkStream(
+      fs.createReadStream(filepath),
+      sri
+    ).catch(err => {
+      if (err.code !== 'EINTEGRITY') { throw err }
+      return rimraf(filepath).then(() => {
+        contentInfo.valid = false
+      })
+    }).then(() => contentInfo)
+  }).catch({ code: 'ENOENT' }, () => ({ size: 0, valid: false }))
+}
+
+function rebuildIndex (cache, opts) {
+  opts.log.silly('verify', 'rebuilding index')
+  return index.ls(cache).then(entries => {
+    const stats = {
+      missingContent: 0,
+      rejectedEntries: 0,
+      totalEntries: 0
+    }
+    const buckets = {}
+    for (let k in entries) {
+      if (entries.hasOwnProperty(k)) {
+        const hashed = index._hashKey(k)
+        const entry = entries[k]
+        const excluded = opts.filter && !opts.filter(entry)
+        excluded && stats.rejectedEntries++
+        if (buckets[hashed] && !excluded) {
+          buckets[hashed].push(entry)
+        } else if (buckets[hashed] && excluded) {
+          // skip
+        } else if (excluded) {
+          buckets[hashed] = []
+          buckets[hashed]._path = index._bucketPath(cache, k)
+        } else {
+          buckets[hashed] = [entry]
+          buckets[hashed]._path = index._bucketPath(cache, k)
+        }
+      }
+    }
+    return BB.map(Object.keys(buckets), key => {
+      return rebuildBucket(cache, buckets[key], stats, opts)
+    }, { concurrency: opts.concurrency }).then(() => stats)
+  })
+}
+
+function rebuildBucket (cache, bucket, stats, opts) {
+  return fs.truncateAsync(bucket._path).then(() => {
+    // This needs to be serialized because cacache explicitly
+    // lets very racy bucket conflicts clobber each other.
+    return BB.mapSeries(bucket, entry => {
+      const content = contentPath(cache, entry.integrity)
+      return fs.statAsync(content).then(() => {
+        return index.insert(cache, entry.key, entry.integrity, {
+          metadata: entry.metadata,
+          size: entry.size
+        }).then(() => { stats.totalEntries++ })
+      }).catch({ code: 'ENOENT' }, () => {
+        stats.rejectedEntries++
+        stats.missingContent++
+      })
+    })
+  })
+}
+
+function cleanTmp (cache, opts) {
+  opts.log.silly('verify', 'cleaning tmp directory')
+  return rimraf(path.join(cache, 'tmp'))
+}
+
+function writeVerifile (cache, opts) {
+  const verifile = path.join(cache, '_lastverified')
+  opts.log.silly('verify', 'writing verifile to ' + verifile)
+  try {
+    return fs.writeFileAsync(verifile, '' + (+(new Date())))
+  } finally {
+    fixOwner.chownr.sync(cache, verifile)
+  }
+}
+
+module.exports.lastRun = lastRun
+function lastRun (cache) {
+  return fs.readFileAsync(
+    path.join(cache, '_lastverified'), 'utf8'
+  ).then(data => new Date(+data))
+}