Hook for mercurial server. Will check syntax of puppet files, yaml files for hiera and erb template files. Add on serrver to .hg/hgrc [hooks] pretxnchangegroup = .hg/puppet_syntax_check.rb

puppet_syntax_check.rb

#!/usr/bin/ruby
 
def chk(file_to_check, cmd)
  puts "checking '#{file_to_check}'"
  if !system("hg cat -r tip '#{file_to_check}' | #{cmd} 2>&1")
    print('!!! Syntax error in file: ' + file_to_check + "\n")
    exit(1)
  end
end

IO.popen('hg status --change tip -man | sort | uniq').readlines.each { |file|
  file_to_check = file.strip
  if file_to_check.match('.pp$')
    chk(file_to_check, 'puppet parser validate')   
  elsif file_to_check.match('.yaml$')
    chk(file_to_check, 'ruby -e "require \'yaml\'; YAML.load(ARGF.read)"')  
  elsif file_to_check.match('.erb$')
    chk(file_to_check, 'erb -x -T - | ruby -c')  	
  end
}