What is github webhook?

This is a small http server written in golang to listen for github webhook push events. In order to run deployment or other tasks based on new commits pushed to the repository.

It is a ready drop in replacement, just copy the code and adapt to your needs if there are not enough options provided by this default implementation.

Install

Given we will run it on our server: http://my-server.com and our repository owner is golang-lt and name is gophers.lt. Then the configuration file should look like:

{
  "webhooks": [
    {
      "repository": "golang-lt/gophers.lt",
      "secret": "secret configured in github webhook",
      "command": {
        "workdir": "/home/gopher/gophers.lt",
        "exec": "./deploy.sh"
      }
    }
  ]
}

Register a webhook in your github repository settings/webhooks. Point to http://my-server.com:9000 or proxy it through webserver.

go build github-webhook
./github-webhook your-config.json

Try the webhook from your github account. By default only push events are read and only master branch changes are taken to account.

The command receives some arguments, for example:

#!/bin/sh

USERNAME=$1
USERMAIL=$2
COMMIT_ID=$3
COMMIT_MSG=$4
COMMIT_DATE=$5

git fetch && git checkout $COMMIT_ID
sudo supervisorctl restart project