3 files changed, 21 insertions, 0 deletions
diff --git a/lib/app.js b/lib/app.js
index cbbc74e..fbdbb8f 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -17,6 +17,7 @@ var proc = require('child_process')
 var toPull = require('stream-to-pull-stream')
 var BoxStream = require('pull-box-stream')
 var crypto = require('crypto')
+var SsbNpmRegistry = require('ssb-npm-registry')
 
 var zeros = new Buffer(24); zeros.fill(0)
 
@@ -65,6 +66,7 @@ function App(sbot, config) {
   this.git = new Git(this.sbot, this.config)
   this.contacts = new Contacts(this.sbot)
   this.follows = new Follows(this.sbot, this.contacts)
+  this.serveSsbNpmRegistry = SsbNpmRegistry.respond(this.sbot, this.config)
 
   this.monitorBlobWants()
 }
diff --git a/lib/render-msg.js b/lib/render-msg.js
index b4ba87a..684ea40 100644
--- a/lib/render-msg.js
+++ b/lib/render-msg.js
@@ -1111,12 +1111,24 @@ RenderMsg.prototype.npmPackages = function (cb) {
   function renderIdLink(id) {
     return [h('a', {href: self.toUrl(id)}, truncate(id, 8)), ' ']
   }
+  var singlePkg = self.c.mentions
+    && self.c.mentions.length === 1
+    && self.c.mentions[0]
+  var m = singlePkg && /^npm:(.*?):(.*?):/.exec(singlePkg.name)
+  var singlePkgSpec = m && (m[1] + (m[2] ? '@' + m[2] : ''))
   self.render.npmPackageMentions(self.c.mentions, function (err, el) {
     if (err) return cb(err)
     var dependencyLinks = u.toArray(self.c.dependencyBranch)
     var versionLinks = u.toArray(self.c.versionBranch)
     self.wrap(h('div', [
       el,
+      singlePkg ? h('p',
+        h('code',
+          'npm install --registry=' +
+            'http://' + self.app.host + ':' + self.app.port +
+            '/npm-registry/' + encodeURIComponent(self.msg.key) + ' ' +
+            singlePkgSpec),
+      ) : '',
       dependencyLinks.length ? h('div',
         'dependencies via: ', dependencyLinks.map(renderIdLink)
       ) : '',
diff --git a/lib/serve.js b/lib/serve.js
index 0e497ea..4b9eb1b 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -352,6 +352,7 @@ Serve.prototype.path = function (url) {
     case '/npm': return this.npm(m[2])
     case '/npm-prebuilds': return this.npmPrebuilds(m[2])
     case '/npm-readme': return this.npmReadme(m[2])
+    case '/npm-registry': return this.npmRegistry(m[2])
     case '/markdown': return this.markdown(m[2])
     case '/zip': return this.zip(m[2])
     case '/web': return this.web(m[2])
@@ -2534,6 +2535,12 @@ Serve.prototype.npmReadme = function (url) {
   )
 }
 
+Serve.prototype.npmRegistry = function (url) {
+  var self = this
+  self.req.url = url
+  self.app.serveSsbNpmRegistry(self.req, self.res)
+}
+
 Serve.prototype.markdown = function (url) {
   var self = this
   var id = decodeURIComponent(url.substr(1))