1 files changed, 147 insertions, 0 deletions
diff --git a/deps/npm/node_modules/pacote/lib/fetchers/registry/manifest.js b/deps/npm/node_modules/pacote/lib/fetchers/registry/manifest.js
new file mode 100644
index 0000000000..febebfbde5
--- /dev/null
+++ b/deps/npm/node_modules/pacote/lib/fetchers/registry/manifest.js
@@ -0,0 +1,147 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const fetch = require('./fetch')
+const LRU = require('lru-cache')
+const optCheck = require('../../util/opt-check')
+const pickManifest = require('npm-pick-manifest')
+const pickRegistry = require('./pick-registry')
+const ssri = require('ssri')
+const url = require('url')
+
+// Corgis are cute. 🐕🐶
+const CORGI_DOC = 'application/vnd.npm.install-v1+json; q=1.0, application/json; q=0.8, */*'
+const JSON_DOC = 'application/json'
+
+module.exports = manifest
+function manifest (spec, opts) {
+  opts = optCheck(opts)
+
+  const registry = pickRegistry(spec, opts)
+  const uri = metadataUrl(registry, spec.escapedName)
+
+  return getManifest(uri, registry, spec, opts).then(manifest => {
+    return annotateManifest(uri, registry, manifest)
+  })
+}
+
+function metadataUrl (registry, name) {
+  const normalized = registry.slice(-1) !== '/'
+  ? registry + '/'
+  : registry
+  return url.resolve(normalized, name)
+}
+
+function getManifest (uri, registry, spec, opts) {
+  return fetchPackument(uri, spec, registry, opts).then(packument => {
+    try {
+      return pickManifest(packument, spec.fetchSpec, {
+        defaultTag: opts.defaultTag
+      })
+    } catch (err) {
+      if (err.code === 'ETARGET' && packument._cached && !opts.offline) {
+        opts.log.silly(
+          'registry:manifest',
+          `no matching version for ${spec.name}@${spec.fetchSpec} in the cache. Forcing revalidation`
+        )
+        opts.preferOffline = false
+        opts.preferOnline = true
+        return fetchPackument(uri, spec, registry, opts).then(packument => {
+          return pickManifest(packument, spec.fetchSpec, {
+            defaultTag: opts.defaultTag
+          })
+        })
+      } else {
+        throw err
+      }
+    }
+  })
+}
+
+// TODO - make this an opt
+const MEMO = new LRU({
+  length: m => m._contentLength,
+  max: 200 * 1024 * 1024, // 200MB
+  maxAge: 30 * 1000 // 30s
+})
+
+module.exports.clearMemoized = clearMemoized
+function clearMemoized () {
+  MEMO.reset()
+}
+
+function fetchPackument (uri, spec, registry, opts) {
+  const mem = pickMem(opts)
+  if (mem && !opts.preferOnline && mem.has(uri)) {
+    return BB.resolve(mem.get(uri))
+  }
+
+  return fetch(uri, registry, Object.assign({
+    headers: {
+      'pacote-req-type': 'packument',
+      'pacote-pkg-id': `registry:${manifest.name}`,
+      accept: opts.fullMetadata ? JSON_DOC : CORGI_DOC
+    },
+    spec
+  }, opts, {
+    // Force integrity to null: we never check integrity hashes for manifests
+    integrity: null
+  })).then(res => res.json().then(packument => {
+    packument._cached = res.headers.has('x-local-cache')
+    packument._contentLength = +res.headers.get('content-length')
+    // NOTE - we need to call pickMem again because proxy
+    //        objects get reused!
+    const mem = pickMem(opts)
+    if (mem) {
+      mem.set(uri, packument)
+    }
+    return packument
+  }))
+}
+
+class ObjProxy {
+  get (key) { return this.obj[key] }
+  set (key, val) { this.obj[key] = val }
+}
+
+// This object is used synchronously and immediately, so
+// we can safely reuse it instead of consing up new ones
+const PROX = new ObjProxy()
+function pickMem (opts) {
+  if (!opts || !opts.memoize) {
+    return MEMO
+  } else if (opts.memoize.get && opts.memoize.set) {
+    return opts.memoize
+  } else if (typeof opts.memoize === 'object') {
+    PROX.obj = opts.memoize
+    return PROX
+  } else {
+    return null
+  }
+}
+
+function annotateManifest (uri, registry, manifest) {
+  const shasum = manifest.dist && manifest.dist.shasum
+  manifest._integrity = manifest.dist && manifest.dist.integrity
+  manifest._shasum = shasum
+  if (!manifest._integrity && shasum) {
+    // Use legacy dist.shasum field if available.
+    manifest._integrity = ssri.fromHex(shasum, 'sha1').toString()
+  }
+  manifest._resolved = (
+    manifest.dist && manifest.dist.tarball
+  )
+  if (!manifest._resolved) {
+    const err = new Error(
+      `Manifest for ${manifest.name}@${manifest.version} from ${uri} is missing a tarball url (pkg.dist.tarball). Guessing a default.`
+    )
+    err.code = 'ENOTARBALL'
+    err.manifest = manifest
+    if (!manifest._warnings) { manifest._warnings = [] }
+    manifest._warnings.push(err.message)
+    manifest._resolved =
+    `${registry}/${manifest.name}/-/${manifest.name}-${manifest.version}.tgz`
+  }
+  return manifest
+}