Ngmin compressor mixin for django-pipeline

compressors.py

# edit: i put this in a project called django-pipeline-ngmin-mixin-compressor 
# which you should use

from pipeline.conf import settings
from pipeline.compressors.yuglify import YuglifyCompressor
from pipeline.compressors.uglifyjs import UglifyJSCompressor


class NgminMixIn(object):
    """
    A mixin class to spice up any pipeline compressor with running ngmin 
    bofore compressing the resulting javascript.
    
    Requires the settings variables `PIPELINE_NGMIN_BINARY` and 
    `PIPELINE_NGMIN_ARGUMENTS` which should be self-explanatory.
    
    Set `PIPELINE_JS_COMPRESSOR` to `path.to.compressors.NgminUglifyCompressor` 
    or roll your own.
    """
    def compress_js(self, js):
        if 'angular' not in js:
            return super(NgminMixIn, self).compress_js(js)

        command = "%s %s" % (
            settings.PIPELINE_NGMIN_BINARY,
            settings.PIPELINE_NGMIN_ARGUMENTS,
        )

        js = self.execute_command(command, js)

        return super(NgminMixIn, self).compress_js(js)


class NgminYuglifyCompressor(NgminMixIn, YuglifyCompressor): pass
class NgminUglifyCompressor(NgminMixIn, UglifyJSCompressor): pass