syaml 2.0

YAML parser that environment variable is expanded

Install

$ pip install syaml

How to use it

A syaml is YAML parser that environment variable is expanded. It can use the path, name, here and environment variable in YAML file. It described in syntax of mako template. See http://www.makotemplates.org/ .

A path is absolute path to YAML file, and name is file name of YAML file, and here is absolute directory path the YAML file stored.

For example.

/path/to/test.yaml:

- ${here}
- ${name}
- ${path}

The above file is equivalent to the following a file.

- /path/to/
- test.yaml
- /path/to/test.yaml

And, it can use environment variable in YAML file too.

/path/to/test.yaml:

- email: ${EMAIL}

If [e-mail] the environment variable EMAIL is set, the above file is equivalent to the following a file.

- email: [e-mail]

Load file and Load string

Example file /path/to/syaml/example.yml:

general:
  - ${here}
  - ${name}
  - ${path}

Load file object:

>>> import syaml
>>> with open('example.yml', 'rb') as fp:
...     syaml.load(fp)
...
{'general': ['/path/to/syaml', 'example.yml', '/path/to/syaml/example.yml']}

Load byte string object:

>>> syaml.loads(b'general:\n  - ${here}\n  - ${name}\n  - ${path}\n')
{'general': ['', '', '']}

Load string object:

>>> syaml.loads('general:\n  - ${here}\n  - ${name}\n  - ${path}\n')
{'general': ['', '', '']}
>>>

name and path and here will replace to empty string If you passed a string to syaml.loads function. They are for a file object. A string like object don’t have file path.

Use command line tool

syaml render

It render the SAYML file.

example.yml:

general:
  - ${here}
  - ${name}
  - ${path}

Execute syaml render command:

$ syaml render example.yml
general:
- /path/to/syaml
- example.yml
- /path/to/syaml/example.yml

Execute syaml render command json style:

$ syaml render example.yml --json
{"general": ["/path/to/syaml", "example.yml", "/path/to/syaml/example.yml"]}

Execute syaml render command pre process only:

$ syaml render example.yml --pre
general:
  - /path/to/syaml
  - example.yml
  - /path/to/syaml/example.yml

Unittest

This section describes the tools and tips used when unittest. Run these tests with the following command:

$ python -m unittest discover src

If all tests pass, you will see the following output:

....
----------------------------------------------------------------------
Ran 4 tests in 0.018s

OK

The number of tests performed may be higher than described in this document.

Test with docker

Build docker image:

$ docker buildx build -t syaml .

Run test:

$ docker run -it --rm --workdir="/app" --volume "$(pwd):/app" --name="syaml" syaml tox

Release flow

• Bump version. Edit setup.cfg file.

• Generate distribution files. python -m build.

• Check distribution files. twine check dist/*.

  • You need to make sure there are no “errors” displayed on the console.

• Upload distribution files. twine upload dist/*.

Other

• PyPI: https://pypi.python.org/pypi/syaml

• Github: https://github.com/TakesxiSximada/syaml