pytemplify 0.1.9

A generic generator framework using Jinja2 and user-defined parsers.

pytemplify

Text file generator framework using parsed dictionary data and Jinja2 templates.

How to create your generator using pytemplify

Install uv:

curl -Ls https://astral.sh/uv/install.sh | sh

Install pytemplify:

pip install pytemplify

Generate the first skeleton of your generator using mygen-init:

cd <your-repo-path>
mygen-init

Complete the TODOs in modules; main implementation module is parser_<your-generator-name>.py.

Try to run:

uv pip install -r requirements.txt
uv venv
source .venv/bin/activate
<your-generator-name>

uv pip install nox
nox

Running Tests and Linters with nox

To run all sessions (formatting, linting, and tests):

nox

To run only tests:

nox -s tests

To run only linting:

nox -s lint

To run only code formatting:

nox -s format_code

Publishing to PyPI with uv

1. Build the package:

uv build

2. Publish to PyPI:

uv publish

For test PyPI, use:

uv publish --repository testpypi

Using TemplateRenderer

The TemplateRenderer class is a powerful utility for rendering Jinja2 templates with special features like manual sections preservation and content injection.

Basic Usage

from pytemplify.renderer import TemplateRenderer
from pathlib import Path

# Create a renderer with data
data = {"project_name": "MyProject", "version": "1.0.0"}
renderer = TemplateRenderer(data)

# Render a string template
template = "Project: {{ project_name }}, Version: {{ version }}"
result = renderer.render_string(template)
print(result)  # Output: "Project: MyProject, Version: 1.0.0"

# Render a template file
renderer.render_file(Path("templates/config.ini.j2"))

# Generate files from a template directory
renderer.generate(Path("templates"), Path("output"))

Manual Sections

Manual sections allow you to preserve user-modified content between template regenerations:

template = """
# Configuration
project_name = {{ project_name }}

# Custom settings
MANUAL SECTION START: custom_settings
# Add your custom settings here
debug = True
MANUAL SECTION END
"""

# Previously rendered content with user modifications
previous = """
# Configuration
project_name = OldProject

# Custom settings
MANUAL SECTION START: custom_settings
# User added these settings
debug = True
verbose = True
log_level = DEBUG
MANUAL SECTION END
"""

# The manual section will be preserved in the new render
result = renderer.render_string(template, previous)

Content Injection

You can inject content into specific parts of existing files:

template = """
<!-- injection-pattern: imports -->
pattern: (?P<injection>import .*)
<!-- injection-string-start -->
import os
import sys
import json
<!-- injection-string-end -->
"""

existing_file = """
import os
import sys
# Other code here
"""

# Will inject the new import statements
result = renderer.inject_string(template, existing_file)

Template Directory Generation

Generate an entire directory structure from templates:

# Will process all .j2 files in templates/ and generate the corresponding 
# structure in output/ with rendered content
renderer.generate(Path("templates"), Path("output"))

For more details, see the API documentation in the code.

TIPs

Activate uv virtual environment:

source .venv/bin/activate

Deactivate uv virtual environment:

deactivate