A git post-receive hook for Jekyll which supports branches

post-receive

#!/usr/bin/env ruby

require 'fileutils'

GIT_REPO = '/home/me/mywebsite_ch.git'
TMP_GIT_CLONE = '/tmp/mywebsite_ch_clone'

DOCROOT = { 'master' => ENV['HOME']+'/public_html',
            'draft' => ENV['HOME']+'/public_html_draft' }

JEKYLL_CONFIG = { 'master' => '_config.yml',
                  'draft' => '_config.yml,_config-draft.yml' }

def exit_with_msg(msg)
  puts msg
  exit 1
end

# detect branch
branch = 'unknown'
$stdin.read.split(' ').each do |param|
  branch = param.split('/')[2] if param.include?('/')
end

exit_with_msg('branch unknown') if branch == 'unknown'
exit_with_msg('branch not configured') if not DOCROOT.has_key?(branch)
exit_with_msg('jekyll config not configured') if not JEKYLL_CONFIG.has_key?(branch)

puts "INFO: cloning branch '#{branch}' to #{TMP_GIT_CLONE}"
system("git clone -b #{branch} #{GIT_REPO} #{TMP_GIT_CLONE}")
Dir.chdir(TMP_GIT_CLONE)
puts "INFO: running jekyll build to '#{DOCROOT[branch]}'"
system("jekyll build -s #{TMP_GIT_CLONE} -d #{DOCROOT[branch]} --config #{JEKYLL_CONFIG[branch]}")
Dir.chdir(ENV['HOME'])
puts "INFO: removing #{TMP_GIT_CLONE}"
FileUtils.rm_rf(TMP_GIT_CLONE)
exit