flask_assets_angular_templates.py

from webassets.filter import Filter

class AngularTemplatesFilter(Filter):
    input_template = "$templateCache.put('%s', '%s');"
    output_template = """
        (function() {
            angular.module('%s').run(['$templateCache', function($templateCache) {
                %s
            }]);
        })();
    """

    def __init__(self, template_module, **kwargs):
        super().__init__(**kwargs)
        self.template_module = template_module

    def output(self, _in, out, **kwargs):
        out.write(self.output_template % (self.template_module, _in.read()))

    def input(self, _in, out, **kwargs):
        source_path = kwargs['source_path']
        rel_path = os.path.relpath(source_path, application.root_path)
        path = os.path.join('/', rel_path)
        data = _in.read().replace("\n", "\\n").replace("'", "\\'")
        out.write(self.input_template % (path, data))


assets.register('application_templates',
    Bundle(
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        'angular/templates/some_template.html',
        filters=AngularTemplatesFilter('MyApp.templates'),
        output='assets/my-app-templates.js'
    ),
)