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How can I prevent Uglifier from removing some comments from some files? I want to have code minified and compressed but also I want the licensing comments to remain intact.
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To compile your assets locally, run the assets:precompile task locally on your app. Make sure to use the production environment so that the production version of your assets are generated. A public/assets directory will be created. Inside this directory you'll find a manifest.
rake assets:clean Only removes old assets (keeps the most recent 3 copies) from public/assets . Useful when doing rolling deploys that may still be serving old assets while the new ones are being compiled.
The require_tree directive tells Sprockets to recursively include all JavaScript files in the specified directory into the output. These paths must be specified relative to the manifest file.
4.1 Precompiling Assets. Rails comes bundled with a rake task to compile the asset manifests and other files in the pipeline to the disk. Compiled assets are written to the location specified in config.
From the documentation of uglifyJS.
-ncor--no-copyright— by default, uglifyjs will keep the initial comment tokens in the generated code (assumed to be copyright information etc.). If you pass this it will discard it.
which is also an option of uglifier.
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