read yaml files in bash

function yaml() {
 hashdot=$(gem list hash_dot);
 if ! [ "$hashdot" != "" ]; then sudo gem install "hash_dot" ; fi
 if [ -f $1 ];then
 cmd=" Hash.use_dot_syntax = true; hash = YAML.load(File.read('$1'));";
 if [ "$2" != "" ] ;then 
 cmd="$cmd puts hash.$2;"
 else
 cmd="$cmd puts hash;"
 fi
 ruby -r yaml -r hash_dot <<< $cmd;
 fi
}

samle yaml content

mykey:
 myotherkey: test

how to use

$ config=$(yaml config.yml mykey.myotherkey)

output

$ echo $config
$ test