import { buildConfig } from './build-config' ; import MagicString from 'magic-string' ; /** License banner from the build config that will be removed in all source files. */ const licenseBanner = buildConfig . licenseBanner ; /**
 * Rollup plugin that removes all license banners of source files.
 * This is necessary to avoid having the license comment repeated in the output.
 */ export const rollupRemoveLicensesPlugin = { name : 'rollup-clean-duplicate-licenses' , transform : ( code ) => { const newContent = new MagicString ( code ) ; for ( let pos = - 1 ; ( pos = code . indexOf ( licenseBanner , pos + 1 ) ) !== - 1 ; null ) { newContent . overwrite ( pos , pos + licenseBanner . length , '' ) ; } return { code : newContent . toString ( ) , map : newContent . generateMap ( { hires : true } ) } ; } } ;