/** @module */
import postcss from 'postcss'
/**
* Marpit PostCSS meta plugin.
*
* Parse CSS comment written in the format of `@key value`.
*
* @alias module:postcss/meta
*/
const plugin = postcss.plugin('marpit-postcss-meta', () => (css, ret) => {
ret.marpitMeta = ret.marpitMeta || {}
css.walkComments(comment => {
comment.text
.slice(0)
.replace(
/^[*!\s]*@([a-z][a-z0-9]*)\s+(.+)$/gim,
(matched, metaName, value) => {
ret.marpitMeta[metaName] = value
}
)
})
})
export default plugin