String interpolation in YAML
I was also looking for this recently for Python and stumbled upon the dynamic-yaml
package, through the Awesome YAML repo on Github.
Link Awesome YAML Github Repo: https://github.com/dreftymac/awesome-yaml#parsers Link Dynamic YAML for Python: https://github.com/childsish/dynamic-yaml
Hope this helps!
Edit: Since the comments are correct and links may break, here is a simple example:
If you have a YAML file that looks like this:
house:
street: cool_street_name
number: 45
street_and_number: {house.street}-{house.number}
Install dynamic_yaml with python -m pip install dynamic_yaml
to run the following script.
import dynamic_yaml
with open(path_to_yaml_file, 'r') as f:
data = dynamic_yaml.load(f)
Then you will get:
print(data['house']['street_and_number'])
>> cool_street_name-45
Unfortunately, you're out of luck. To do what you want you'd need to pass in $home
from a view file (or wherever) and interpolate it in your yaml entry, which could possibly look something like:
Alice: ! '%{home}/Alice'
See this StackOverflow Q&A for the detailed answer to pretty much exactly your question.
You should use ERB template.
you can write like following:
Alice: <%=home%>/alice
When use, you need parse home
value with ERB before parse as YAML.
if home is local variable, you need pass local binding in as #result method's argument.
if you not pass this, will use TOP LEVEL binding as default.
Like this:
require 'erb'
home = 'home'
YAML.load(ERB.new(yaml_content).result(binding))