Created
December 11, 2012 18:13
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LiveReload compatibility hack for Webassets
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| Tested with LiveReload 2.3.18 | |
| The only requirement is that the updating requests are sent with ?livereload={etc} in the url. | |
| LiveReload should be configured to NOT compile the assets, as we want webassets to take care of this. We're | |
| just using LR for the notification/loading parts. |
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| import re | |
| import os | |
| from flask import current_app, redirect | |
| def get_bundle_from_output(path, env_or_bundles): | |
| for bundle in env_or_bundles: | |
| output = getattr(bundle, 'output', None) | |
| if output == path: | |
| return bundle | |
| elif output and '%(version)s' in output: | |
| pattern = re.escape(output).replace('\%\(version\)s', '(\\w+)') | |
| if re.match(pattern, path): | |
| return bundle | |
| if hasattr(bundle, 'contents'): | |
| children = get_bundle_from_output(path, bundle.contents) | |
| if children: | |
| return children | |
| # Example Flask handler | |
| @app.before_request | |
| def livereload(): | |
| if 'livereload' in request.args: | |
| path = os.path.relpath(request.path, assets_env.url) | |
| bundle = get_bundle_from_output(path, assets_env) | |
| if bundle: | |
| print 'Building', bundle | |
| bundle.build(env=assets_env) | |
| url = bundle.urls(env=assets_env)[0] | |
| if url.split('?')[0] != request.path: | |
| print 'Url changed, redirecting to', url | |
| return redirect(url) | |
| else: | |
| print 'No bundle found for', path |
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