TYPO3 Core

f:asset.css and f:asset.script are great but miss an option to render inline from files.
This would help keeping JavaScript and CSS out of XML files in case one desires rendering it inline.

So for example this CSS file would be loaded inline:

<f:asset.css identifier="extensionName" inline href="EXT:extensionname/Resources/Public/Css/extensionname.css" />

Probably not so simple but...
Registering the 'inline' attribute and then adding a condition something like this in:
typo3/sysext/fluid/Classes/ViewHelpers/Asset/CssViewHelper.php

if ($file !== null) {
    if ($inline) {
        $content = (string)file_get_contents(GeneralUtility::getFileAbsFileName(trim($file)));
        $this->assetCollector->addInlineStyleSheet($identifier, $content, $attributes, $options);
    } else {
        $this->assetCollector->addStyleSheet($identifier, $file, $attributes, $options);
    }
}