Print warning for loading deprecated hubot-scripts.json

bin/hubot

@@ -104,9 +104,42 @@ else
           scriptsPath = Path.resolve "node_modules", "hubot-scripts", "src", "scripts"
           robot.loadHubotScripts scriptsPath, scripts
         catch err
-          console.error "Error parsing JSON data from hubot-scripts.json: #{err}"
+          robot.logger.error "Error parsing JSON data from hubot-scripts.json: #{err}"
           process.exit(1)
 
+        hubotScriptsWarning = "Loading scripts from hubot-scripts.json is deprecated and " +
+          "will be removed in 3.0 (https://github.com/github/hubot-scripts/issues/1113) " +
+          "in favor of packages for each script.\n\n"
+
+        if scripts.length is 0
+          hubotScriptsWarning += "Your hubot-scripts.json is empty, so you just need to remove it."
+        else
+          hubotScriptsReplacements = Path.resolve "node_modules", "hubot-scripts", "replacements.json"
+
+          if Fs.existsSync(hubotScriptsReplacements)
+            hubotScriptsWarning += "The following scripts have known replacements. Follow the link for installation instructions, then remove it from hubot-scripts.json:\n"
+
+            replacementsData = Fs.readFileSync(hubotScriptsReplacements)
+            replacements = JSON.parse(replacementsData)
+            scriptsWithoutReplacements = []
+            for script in scripts
+              replacement = replacements[script]
+              if replacement
+                hubotScriptsWarning += "* #{script}: #{replacement}\n"
+              else
+                scriptsWithoutReplacements.push(script)
+            hubotScriptsWarning += "\n"
+
+            if scriptsWithoutReplacements.length > 0
+              hubotScriptsWarning += "The following scripts don't have (known) replacements. You can try searching https://www.npmjs.com/ or http://github.com/search or your favorite search engine. You can copy the script into your local scripts directory, or consider creating a new package to maintain yourself. If you find a replacement or create a package yourself, please post on https://github.com/github/hubot-scripts/issues/1641:\n"
+              hubotScriptsWarning += "* #{script}\n" for script in scriptsWithoutReplacements
+
+              hubotScriptsWarning += "\nYou an also try updating hubot-scripts to get the latest list of replacements: npm install --save hubot-scripts@latest"
+          else
+              hubotScriptsWarning += "To get a list of recommended replacements, update your hubot-scripts: npm install --save hubot-scripts@latest"
+
+      robot.logger.warning hubotScriptsWarning
+
     externalScripts = Path.resolve ".", "external-scripts.json"
     if Fs.existsSync(externalScripts)
       Fs.readFile externalScripts, (err, data) ->