python-hcl2 7.1.0

A parser for HCL2

Python HCL2

A parser for HCL2 written in Python using Lark. This parser only supports HCL2 and isn't backwards compatible with HCL v1. It can be used to parse any HCL2 config file such as Terraform.

About Amplify

Amplify builds innovative and compelling digital educational products that empower teachers and students across the country. We have a long history as the leading innovator in K-12 education - and have been described as the best tech company in education and the best education company in tech. While others try to shrink the learning experience into the technology, we use technology to expand what is possible in real classrooms with real students and teachers.

Learn more at https://www.amplify.com

Getting Started

Prerequisites

python-hcl2 requires Python 3.7 or higher to run.

Installing

This package can be installed using pip

pip3 install python-hcl2

Usage

import hcl2
with open('foo.tf', 'r') as file:
    dict = hcl2.load(file)

Parse Tree to HCL2 reconstruction

With version 6.x the possibility of HCL2 reconstruction from the Lark Parse Tree and Python dictionaries directly was introduced.

Documentation and an example of manipulating Lark Parse Tree and reconstructing it back into valid HCL2 can be found in tree-to-hcl2-reconstruction.md file.

More details about reconstruction implementation can be found in PRs #169 and #177.

Building From Source

For development, tox>=4.0.9 is recommended.

Running Tests

python-hcl2 uses tox. You will need to install tox with pip install tox. Running tox will automatically execute linters as well as the unit tests.

You can also run them individually with the -e argument.

For example, tox -e py37-unit will run the unit tests for python 3.7

To see all the available options, run tox -l.

Releasing

To create a new release go to Releases page, press 'Draft a new release', create a tag with a version you want to be released, fill the release notes and press 'Publish release'. Github actions will take care of publishing it to PyPi.

Responsible Disclosure

If you have any security issue to report, contact project maintainers privately. You can reach us at mailto:[e-mail]

Contributing

We welcome pull requests! For your pull request to be accepted smoothly, we suggest that you:

• For any sizable change, first open a GitHub issue to discuss your idea.
• Create a pull request. Explain why you want to make the change and what it’s for.

We’ll try to answer any PR’s promptly.

Limitations

Error parsing string interpolations nested more than 2 times

• Parsing following example is expected to throw out an exception and fail:

  locals {
    foo = "foo"
    name = "prefix1-${"prefix2-${"${local.foo}-bar"}"}" //should interpolate into "prefix1-prefix2-foo-bar" but fails
  }
  

  We recommend working around this by modifying the configuration in the following manner:

  locals {
    foo = "foo"
    foo_bar = "${local.foo}-bar"
    name = "prefix1-${"prefix2-${local.foo_bar}"}" //interpolates into "prefix1-prefix2-foo-bar"
  }