Keep track of hubot-scripts replacements in replacement.json, and add helper for deprecating a script.

Author: technicalpickles

replacements.json

@@ -0,0 +1,22 @@
+{
+  "9gag.coffee": "https://github.com/luijose/hubot-9gag",
+  "ambush": "https://github.com/hubot-scripts/hubot-ambush",
+  "asana.coffee": "https://github.com/hubot-scripts/hubot-asana",
+  "auth": "https://github.com/hubot-scripts/hubot-auth",
+  "darksky.coffee": "https://github.com/hubot-scripts/hubot-darksky",
+  "factoids.coffee": "https://github.com/hubot-scripts/hubot-factoids",
+  "gitlab.coffee": "https://github.com/spruce/hubot-gitlab-hooks",
+  "google.coffee": "https://github.com/mnpk/hubot-google",
+  "isup.coffee": "https://github.com/pric/hubot-isup",
+  "jenkins.coffee": "https://github.com/balbeko/hubot-jenkins",
+  "jira-issues.coffee": "https://github.com/rustedgrail/hubot-jira",
+  "karma.coffee": "https://github.com/ajacksified/hubot-plusplus",
+  "meme_captain.coffee": "https://github.com/cycomachead/hubot-meme",
+  "pagerduty": "https://github.com/hubot-scripts/hubot-pager-me",
+  "plusplus": "https://github.com/ajacksified/hubot-plusplus",
+  "resumator.coffee": "https://github.com/ChrisMissal/hubot-resumator",
+  "tell": "https://github.com/hubot-scripts/hubot-tell",
+  "wolfram.coffee": "https://github.com/notpeter/hubot-wolfram",
+  "xkcd.coffee": "https://www.npmjs.com/package/hubot-xkcd",
+  "youtube-info": "https://github.com/ClaudeBot/hubot-youtube-info"
+}

src/hubot-scripts.coffee

@@ -0,0 +1,28 @@
+Path = require 'path'
+Fs   = require 'fs'
+
+HubotScripts = {}
+
+replacementsPath = Path.resolve(__dirname, "..", "replacements.json")
+
+if Fs.existsSync(replacementsPath)
+  data = Fs.readFileSync(replacementsPath)
+  if data.length > 0
+    try
+      replacements = JSON.parse data
+    catch err
+      console.error "Error parsing JSON data from hubot-scripts's replacements.json: #{err}"
+      process.exit(1)
+
+HubotScripts.replacements = replacements ?= {}
+
+HubotScripts.deprecatedScriptsUsed = deprecatedScriptsUsed =  []
+HubotScripts.deprecate = (robot, filename) ->
+  filename = Path.basename(filename)
+
+  replacement = replacements[filename]
+  if replacement
+    robot.logger.warning "#{filename} has moved to its own package. Remove it from your hubot-scripts.json and see #{replacement} for how to install the new version"
+    deprecatedScriptsUsed.push(filename)
+
+module.exports = HubotScripts

src/scripts/9gag.coffee

@@ -17,11 +17,13 @@
 # Contributors:
 #   dedeibel (gif support)
 
+Path        = require("path")
+HubotScripts = require(Path.resolve(__dirname, "..", "hubot-scripts"))
 Select      = require( "soupselect" ).select
 HTMLParser  = require "htmlparser"
 
 module.exports = (robot)->
-  robot.logger.warning "9gag.coffee has moved from hubot-scripts to its own package. See https://github.com/luijose/hubot-9gag installation instructions"
+  HubotScripts.deprecate(robot, __filename)
 
   robot.respond /9gag( me)?/i, (message)->
     send_meme message, false, (title, src)->
@@ -81,4 +83,3 @@ escape_html_characters = (text)->
   for r in replacements
     text = text.replace r[0], r[1]
   return text
-