Hubotを使ってSlackに投稿されたメッセージに応答してシェルスクリプトを実行させる

$ npm install -g yo generator-hubot

$ mkdir myhubot
$ cd myhubot

$ yo hubot

$ yo hubot
? ==========================================================================
We're constantly looking for ways to make yo better! 
May we anonymously report usage statistics to improve the tool over time? 
More info: https://github.com/yeoman/insight & https://yeoman.io
========================================================================== (Y/n) n

? Owner myowner
? Bot name myhubot
? Description my first bot
? Bot adapter slack

$ yo hubot
? ==========================================================================
We're constantly looking for ways to make yo better! 
May we anonymously report usage statistics to improve the tool over time? 
More info: https://github.com/yeoman/insight & https://yeoman.io
========================================================================== (Y/n) n                     _____________________________  
                    /                             \ 
   //\              |      Extracting input for    |
  ////\    _____    |   self-replication process   |
 //////\  /_____\   \                             / 
 ======= |[^_/\_]|   /----------------------------  
  |   | _|___@@__|__                                
  +===+/  ///     \_\                               
   | |_\ /// HUBOT/\\                             
   |___/\//      /  \\                            
         \      /   +---+                            
          \____/    |   |                            
           | //|    +===+                            
            \//      |xx|                            

? Owner myowner
? Bot name myhubot
? Description my first bot
? Bot adapter slack
   create bin/hubot
   create bin/hubot.cmd
   create Procfile
   create README.md
   create external-scripts.json
   create hubot-scripts.json
   create .gitignore
   create package.json
   create scripts/example.coffee
   create .editorconfig
                     _____________________________  
 _____              /                             \ 
 \    \             |   Self-replication process   |
 |    |    _____    |          complete...         |
 |__\\|   /_____\   \     Good luck with that.    / 
   |//+  |[^_/\_]|   /----------------------------  
  |   | _|___@@__|__                                
  +===+/  ///     \_\                               
   | |_\ /// HUBOT/\\                             
   |___/\//      /  \\                            
         \      /   +---+                            
          \____/    |   |                            
           | //|    +===+                            
            \//      |xx|                            

npm notice created a lockfile as package-lock.json. You should commit this file.
+ hubot-heroku-keepalive@1.0.3
+ hubot-google-images@0.2.7
+ hubot-diagnostics@1.0.0
+ hubot-maps@0.0.3
+ hubot-redis-brain@1.0.0
+ hubot-help@1.0.1
+ hubot-pugme@0.1.1
+ hubot@3.3.2
+ hubot-scripts@2.17.2
+ hubot-google-translate@0.2.1
+ hubot-shipit@0.2.1
+ hubot-rules@1.0.0
+ hubot-slack@4.7.1
added 159 packages from 127 contributors and audited 274 packages in 9.657s
found 0 vulnerabilities

$ bin/hubot 
audited 274 packages in 1.398s
found 0 vulnerabilities

No history available
myhubot> [Sun Aug 04 2019 00:57:05 GMT+0900 (GMT+09:00)] WARNING 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.

Your hubot-scripts.json is empty, so you just need to remove it.
[Sun Aug 04 2019 00:57:05 GMT+0900 (GMT+09:00)] INFO hubot-redis-brain: Using default redis on localhost:6379
[Sun Aug 04 2019 00:57:05 GMT+0900 (GMT+09:00)] ERROR hubot-heroku-keepalive included, but missing HUBOT_HEROKU_KEEPALIVE_URL. `heroku config:set HUBOT_HEROKU_KEEPALIVE_URL=$(heroku apps:info -s | grep web.url | cut -d= -f2)`

myhubot>

myhubot> help
usage:
history 
exit, \q - close shell and exit
help, \? - print this usage
clear, \c - clear the terminal screen

HUBOT_SLACK_TOKEN=xoxb-1234567889-1297691287308-joup923hotp9283ht3o2j3tp

$ HUBOT_SLACK_TOKEN=xoxb-1234567889-1297691287308-joup923hotp9283ht3o2j3tp bin/hubot --adapter slack

$ cd scripts

$ mkdir shell

#!/bin/sh
echo "Hello from script"

$ vi exec_shell.coffee

module.exports = (robot) ->
  robot.respond /myecho/, (msg) ->
    @exec = require('child_process').exec
    cmd = "sh /home/username/myhubot/scripts/shell/hello.sh"
    msg.send "#{cmd} を実行しました。"
    @exec cmd, (error, stdout, stderr) ->
      if error
        msg.send error
        msg.send stderr
      else
        msg.send stdout
  robot.respond /testshell/, (msg) ->
    @exec = require('child_process').exec
    cmd = "sh /home/username/myhubot/scripts/shell/hello.sh"
    msg.send "#{cmd} を実行しました。"
    @exec cmd, (error, stdout, stderr) ->
      if error
        msg.send error
        msg.send stderr
      else
        msg.send stdout