Cookiecutter: Cookiecutter tries to fill in YAML variables

[noah-empire]

• Cookiecutter version: 1.6.0
• Python version: 2.7
• Operating System: MacOS

Description:

The project I'm trying to template has the following line in a YAML file:
- v1-dependencies-{{ checksum "requirements.txt" }}

It runs on CircleCI and creates a hash of the requirements file to determine if the cached packages are still valid. The file also has parts that I'd like to template in like {{cookiecutter.project_name}}. When I run it on this project, cookiecutter tries to replace the first line and fails.

DB_NAME [MYTEST_local]:
DB_USER []:
DB_PASSWORD []:
DB_PORT [5432]:
DATABASE_URL [127.0.0.1]:
Traceback (most recent call last):
  File "/usr/local/bin/cookiecutter", line 11, in <module>
    load_entry_point('cookiecutter==1.6.0', 'console_scripts', 'cookiecutter')()
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/cookiecutter/cli.py", line 120, in main
    password=os.environ.get('COOKIECUTTER_REPO_PASSWORD')
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/cookiecutter/main.py", line 94, in cookiecutter
    output_dir=output_dir
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/cookiecutter/generate.py", line 364, in generate_files
    generate_file(project_dir, infile, context, env)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/cookiecutter/generate.py", line 166, in generate_file
    tmpl = env.get_template(infile_fwd_slashes)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/jinja2/environment.py", line 830, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/jinja2/environment.py", line 804, in _load_template
    template = self.loader.load(self, name, globals)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/jinja2/loaders.py", line 125, in load
    code = environment.compile(source, name, filename)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/jinja2/environment.py", line 591, in compile
    self.handle_exception(exc_info, source_hint=source_hint)
  File "/usr/local/Cellar/cookiecutter/1.6.0/libexec/lib/python2.7/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "./.circle/config.yml", line 21, in template
jinja2.exceptions.TemplateSyntaxError: expected token 'end of print statement', got 'string'
  File "./.circle/config.yml", line 21
    - v1-dependencies-{{ checksum "requirements.txt" }}

I see two options, but I'm not sure if there's a way to implement them without changes to the codebase:

1. Find a way to make cookiecutter fail silently on these, or ignore them altogether.
2. Define the YAML vars in the cookiecutter.json and suppress the prompt to change them. I've seen that there is a --no-input flag, but this will apply to all variables in the project.

[jeremycarroll]

I read some suggestions in jinja documentation.

[jeremycarroll]

In particular this circleci/config.yml snippet works in the cookie cutter template:

      - restore_cache:
          key: {{ cookiecutter.project_dash_slug  }}-{% raw %}{{ .Branch }}-{{ checksum "Pipfile.lock" }}-{{ checksum "_tmp_file" }}{% endraw %}

The first item is a cookiecutter config, the last three are circleci options