support file protocol

lib/install/installer.js

@@ -3,6 +3,7 @@ const path = require('path')
 const nm = require('../utils/nm')
 const bin = require('./bin')
 const git = require('./installer/git')
+const local = require('./installer/local')
 const registry = require('./installer/registry')
 
 const installer = (dep, deps, base, resolve, reject) => {
@@ -21,6 +22,9 @@ const installer = (dep, deps, base, resolve, reject) => {
     case 'git':
       fetch = git(pkg, target)
       break
+    case 'local':
+      fetch = local(pkg, target)
+      break
     case 'registry':
     default:
       fetch = registry(pkg, target)

lib/install/installer/local.js

@@ -0,0 +1,5 @@
+const fs = require('fs-extra')
+
+module.exports = (pkg, cwd) => {
+  return fs.copy(pkg.url, cwd)
+}

lib/install/resolver/fetchers/local.js

@@ -1,5 +1,25 @@
-module.exports = () => {
+const { readFile } = require('fs')
+const { URL } = require('url')
+const { normalize, resolve, join } = require('path')
+
+module.exports = (name, spec, result) => {
+  spec = spec.replace('file:', '')
+  if (spec[0] === '~') {
+    spec = join(process.env.HOME, spec.slice(1))
+  }
+  spec = resolve(spec)
+  pkgJSON = spec.indexOf('package.json') !== -1
+    ? spec
+    : join(spec, 'package.json')
   return new Promise((resolve, reject) => {
-    reject(new Error('this type is not supported yet'))
+    try {
+      const pkg = require(pkgJSON)
+      resolve({
+        type: 'local',
+        version: pkg.version,
+        dependencies: pkg.dependencies,
+        url: spec
+      })
+    } catch (e) { reject (e) }
   })
 }