1 files changed, 63 insertions, 0 deletions
diff --git a/node_modules/pacote/lib/fetch.js b/node_modules/pacote/lib/fetch.js
new file mode 100644
index 000000000..8e4a204b5
--- /dev/null
+++ b/node_modules/pacote/lib/fetch.js
@@ -0,0 +1,63 @@
+'use strict'
+
+const duck = require('protoduck')
+
+const Fetcher = duck.define(['spec', 'opts', 'manifest'], {
+  manifest: ['spec', 'opts'],
+  tarball: ['spec', 'opts'],
+  fromManifest: ['manifest', 'spec', 'opts'],
+  clearMemoized () {}
+}, {name: 'Fetcher'})
+module.exports = Fetcher
+
+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 TYPES = new Set([
+  'directory',
+  'file',
+  'git',
+  'hosted',
+  'range',
+  'remote',
+  'tag',
+  'version'
+])
+
+const fetchers = {}
+
+module.exports.clearMemoized = clearMemoized
+function clearMemoized () {
+  Object.keys(fetchers).forEach(k => {
+    fetchers[k].clearMemoized()
+  })
+}
+
+function getFetcher (type) {
+  if (!TYPES.has(type)) {
+    throw new Error(`Invalid dependency type requested: ${type}`)
+  } else if (fetchers[type]) {
+    return fetchers[type]
+  } else {
+    const fetcher = (
+      fetchers[type] ||
+      (
+        fetchers[type] = require(`./fetchers/${type}`)
+      )
+    )
+    return fetcher
+  }
+}