Boolean variables from .scaraplate.conf incorrectly works

[rusdevops]

Makefile

{% if cookiecutter.use_proto %}
.PHONY: proto
proto:
  protoc --go_out=. proto/go_example_api.proto
{% endif %}

hooks/post_gen_project.py

def main():

  use_proto = "{{cookiecutter.use_proto}}"
  print("!!!", use_proto)
{% if cookiecutter.use_proto %}
    make = Popen(["make", "proto"], cwd=PROJECT_DIRECTORY)
    make.wait()
{% else %}

make proto is not called (good)

# create repo
$ scaraplate rollup go-project-template go-example-api
`go-example-api/.scaraplate.conf` file doesn't exist

!!! False

$ cat go-example-api/.scaraplate.conf

use_proto = False

make proto is called (bad)

# update repo
scaraplate rollup go-project-template go-example-api
Continuing with the following context from the `go-example-api/.scaraplate.conf` file:
// ...
'use_proto': 'False',

!!! False
 
protoc --go_out=. proto/go_example_api.proto

Expected behavior:
make proto will not be called when updating

Environment:

$ scaraplate --version
scaraplate, version 0.5

$ cookiecutter --version
Cookiecutter 2.6.0

[rusdevops]

$ cat local_extensions.py

from jinja2.ext import Extension


class YesExtension(Extension):
    def __init__(self, environment):
        super(YesExtension, self).__init__(environment)
        environment.filters['yes'] = lambda v: yes(v)

def yes(value):
    if isinstance(value, str):
        return value.lower() in ['true', '1', 'yes']
    return bool(value)

$ cat cookiecutter.json

{
  "use_proto": false,

  "_extensions": ["local_extensions.YesExtension"]
}

$ cat hooks/post_gen_project.py

{% if cookiecutter.use_proto|yes %}
  // ...
{% endif %}