A Jinja2 extension to compile and/or compress your assets.
pip install jac
For LESS and CSS support, install less:
npm install -g less
For Sass and SCSS support, install sass:
gem install sass
JavaScript minification is built-in using the Python rJsmin package.
When installing on Mac OS X set this shell variable, because jac dependencies contain C code:
export CFLAGS=-Qunused-arguments
To use it, you just have to put your css or js inside a compress tag.
{% compress 'css' %}
<style type="text/sass">
sass stuff
</style>
<link rel="stylesheet" type="text/sass" href="file.sass">
{% endcompress %}
{% compress 'js' %}
<script type="text/coffeescript">
coffee stuff
</script>
<script type="text/coffescript" src="file.coffee"></script>
{% endcompress %}You just have to create an environment with jac on it and configure output dir, static prefix and say where it can find your sources.
import jinja2
from jac import CompressorExtension
env = jinja2.Environment(extensions=[CompressorExtension])
env.compressor_output_dir = './static/dist'
env.compressor_static_prefix = '/static'
env.compressor_source_dirs = './static_files'After that just use template = env.from_string(html); template.render() to get it done.
Where you configure your app, just do this:
from jac.contrib.flask import JAC
app = Flask(__name__)
app.config['COMPRESSOR_DEBUG'] = app.config.get('DEBUG')
app.config['COMPRESSOR_OUTPUT_DIR'] = './static/dist'
app.config['COMPRESSOR_STATIC_PREFIX'] = '/static'
jac = JAC(app)And you are done.
JAC supports compressing static assets offline, then deploying to a production server. Here is a script to compress your static assets if using Flask:
#!/usr/bin/env python
import os
import shutil
import sys
from jac.contrib.flask import get_template_dirs
from my_flask_app import app
def main():
env = app.jinja_env
if os.path.exists(env.compressor_output_dir):
print('Deleting previously compressed files in {output_dir}'
.format(output_dir=env.compressor_output_dir))
shutil.rmtree(env.compressor_output_dir)
else:
print('No previous compressed files found in {output_dir}'
.format(output_dir=env.compressor_output_dir))
template_dirs = ['my_flask_app/' + x for x in get_template_dirs(app)]
print('Compressing static assets into {output_dir}'
.format(output_dir=env.compressor_output_dir))
compressor = env.extensions['jac.extension.CompressorExtension'].compressor
compressor.offline_compress(env, template_dirs)
print 'Finished.'
return 0
if __name__ == '__main__':
sys.exit(main())virtualenv venv
. venv/bin/activate
pip install -r requirements_tests.txt
make test