* first action! (#1)

node_modules/pacote/lib/fetch.js

@@ -0,0 +1,82 @@
+'use strict'
+
+const duck = require('protoduck')
+
+const Fetcher = duck.define(['spec', 'opts', 'manifest'], {
+  packument: ['spec', 'opts'],
+  manifest: ['spec', 'opts'],
+  tarball: ['spec', 'opts'],
+  fromManifest: ['manifest', 'spec', 'opts'],
+  clearMemoized () {}
+}, { name: 'Fetcher' })
+module.exports = Fetcher
+
+module.exports.packument = packument
+function packument (spec, opts) {
+  const fetcher = getFetcher(spec.type)
+  return fetcher.packument(spec, opts)
+}
+
+module.exports.manifest = manifest
+function manifest (spec, opts) {
+  const fetcher = getFetcher(spec.type)
+  return fetcher.manifest(spec, opts)
+}
+
+module.exports.tarball = tarball
+function tarball (spec, opts) {
+  return getFetcher(spec.type).tarball(spec, opts)
+}
+
+module.exports.fromManifest = fromManifest
+function fromManifest (manifest, spec, opts) {
+  return getFetcher(spec.type).fromManifest(manifest, spec, opts)
+}
+
+const fetchers = {}
+
+module.exports.clearMemoized = clearMemoized
+function clearMemoized () {
+  Object.keys(fetchers).forEach(k => {
+    fetchers[k].clearMemoized()
+  })
+}
+
+function getFetcher (type) {
+  if (!fetchers[type]) {
+    // This is spelled out both to prevent sketchy stuff and to make life
+    // easier for bundlers/preprocessors.
+    switch (type) {
+      case 'alias':
+        fetchers[type] = require('./fetchers/alias')
+        break
+      case 'directory':
+        fetchers[type] = require('./fetchers/directory')
+        break
+      case 'file':
+        fetchers[type] = require('./fetchers/file')
+        break
+      case 'git':
+        fetchers[type] = require('./fetchers/git')
+        break
+      case 'hosted':
+        fetchers[type] = require('./fetchers/hosted')
+        break
+      case 'range':
+        fetchers[type] = require('./fetchers/range')
+        break
+      case 'remote':
+        fetchers[type] = require('./fetchers/remote')
+        break
+      case 'tag':
+        fetchers[type] = require('./fetchers/tag')
+        break
+      case 'version':
+        fetchers[type] = require('./fetchers/version')
+        break
+      default:
+        throw new Error(`Invalid dependency type requested: ${type}`)
+    }
+  }
+  return fetchers[type]
+}