A sample of ingredient's DSL

prototype ingredient for java

##
## An ingredient file.
##

#
# Give a basic name and description of the package this ingredient file configures.
#
name        'jdk1.6.0_20'
description 'java for use on service nodes'

#
# Operations needed to configure this ingredient into the current environment
#
add {
  @java_level = 'jdk1.6.0_20'
  @java_curpath = '/opt/java/' + java_level

  prepend_path :PATH, java_curpath + '/bin'
  prepend_path :MANPATH, java_curpath + '/man'

  ## FIXME: how do we deal with clobbered env vars?

  set_env :JAVA_PATH, java_curpath
  set_env :JAVA_VERSION, java_level
}

#####                                        #####
##### Everything past this line is optional. #####
#####                                        #####

#
# Operations needed to remove this ingredient from the current environment.
#
remove {
  # remove it from the environment

  ## FIXME: what parts of the add{} should be undone automatically?
}

##
## Tasting an ingredient is a simple sanity check to see if the configuration was a success.
## All tasting begins with "taste_".
##

# This taste is a simple test to make sure java returns the correct version.
taste_version_java {
  IO.popen('java -version') do |f|
    while line = f.gets do
      assert_true line.include? '1.6.0_20-b02' or line.include? '16.3-b01'
    end
  end
}

# This taste is a simple test to make sure javac returns the correct version number
taste_version_javac {
  assert_true IO.popen('javac -version').gets.include? 'javac 1.6.0_20'
}

##
## Noming an ingredient is an extended test meant for regression testing.
## All noming begins with "nom_".
##

# This nom compiles a sample program and verifies that the program output is expected.
nom_compile_program {
  require 'tmpdir'

  random_name = ''
  for i in 1..10 do random_name << (65 + rand(26)) end

  src_filename = File.join(Dir.tmpdir, random_name + '.java')
  class_filename = File.join(Dir.tmpdir, random_name + '.class')

  program = %(
    class #{random_name} {
        public static void main( String args[] ) {
            System.out.println("#{random_name}");
        }
    }
  )

  File.open(src_filename, 'w') {|f| f.write(program) }
  IO.popen('javac #{src_filename}');

  assert_true File.exist? class_filename
  assert_equals `java #{Dir.tmpdir}#{random_name}`, random_name
}

## EOF