Ruby templating using YAML datasources

  require 'ruyml'
  require 'yaml'

  content = YAML.load(File.read("file.yml"))
  r = Ruyml::Data.new(content)
  r.render("template.erb", "output.txt")

Given a yaml file :

alert:
  message: 'hello world !'

And an erb file :

message = "<%= alert.message.capitalize %>"

Running :

ruyml -d alert.yaml -t template.erb

Gives the following output :

message = "Hello world !"

You can refer to multiple YAML datasources in a template and render it using :

ruyml -d data1.yaml,data2.yaml -t template.erb

When iterating over an item which is not a leaf of the YAML file, you can access methods of the Hash class directly. In case a propertie has the same name than the method you are trying to use, simply use the <method>! form.

For instance :

object:
  each:
    - attr1: val1
    - attr2: val2
    - attr3: val3

Object dump :
<%= object.each %>

Object attributes:
<% object.each! do |p, items| -%>
  <% items.each do |attr, val| -%>
    Attribute <%= attr %> has value <%= val %>
  <% end -%>
<% end -%>