Bash-only parser that leverages sed and awk to parse simple yaml files.

parse_yaml.sh

##
# Bash-only parser that leverages sed and awk to parse simple yaml files.
# Code based from: http://stackoverflow.com/a/21189044
# Usage: eval $(parse_yaml sample.yml)
# or
# Usage: variable = parse_yaml sample.yml
#
# @param $1 the path of the .yml file
# @param $2 an optional prefix to the name of the variables
# @author stefan-farestam
# @author gustavosotnas
##
parse_yaml() {

    local prefix=$2
    local s='[[:space:]]*' w='[a-zA-Z0-9_]*' fs=$(echo @|tr @ '\034')
    if [ ! -f "$1" ] # if the .yml file exists
    then
        return 1; # the file doesn't exists.
    fi
    2>/dev/null sed -ne "s|^\($s\):|\1|" \
         -e "s|^\($s\)\($w\)$s:$s[\"']\(.*\)[\"']$s\$|\1$fs\2$fs\3|p" \
         -e "s|^\($s\)\($w\)$s:$s\(.*\)$s\$|\1$fs\2$fs\3|p"  $1 | awk -F$fs '{
       indent = length($1)/2;
       vname[indent] = $2;
       for (i in vname) {if (i > indent) {delete vname[i]}}
       if (length($3) > 0) {
          vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
          printf("%s%s%s=\"%s\"\n", "'$prefix'",vn, $2, $3);
       }
    }'
    if [ "$?" != "0" ]
    then
        return 1;
    fi
}