| 1 | import { keys } from './object.js';
|
| 2 |
|
| 3 | function badExports ( option, keys ) {
|
| 4 | throw new Error( `'${option}' was specified for options.exports, but entry module has following exports: ${keys.join(', ')}` );
|
| 5 | }
|
| 6 |
|
| 7 | export default function getExportMode ( bundle, exportMode ) {
|
| 8 | const exportKeys = keys( bundle.entryModule.exports )
|
| 9 | .concat( keys( bundle.entryModule.reexports ) )
|
| 10 | .concat( bundle.entryModule.exportAllSources );
|
| 11 |
|
| 12 | if ( exportMode === 'default' ) {
|
| 13 | if ( exportKeys.length !== 1 || exportKeys[0] !== 'default' ) {
|
| 14 | badExports( 'default', exportKeys );
|
| 15 | }
|
| 16 | } else if ( exportMode === 'none' && exportKeys.length ) {
|
| 17 | badExports( 'none', exportKeys );
|
| 18 | }
|
| 19 |
|
| 20 | if ( !exportMode || exportMode === 'auto' ) {
|
| 21 | if ( exportKeys.length === 0 ) {
|
| 22 | exportMode = 'none';
|
| 23 | } else if ( exportKeys.length === 1 && exportKeys[0] === 'default' ) {
|
| 24 | exportMode = 'default';
|
| 25 | } else {
|
| 26 | exportMode = 'named';
|
| 27 | }
|
| 28 | }
|
| 29 |
|
| 30 | if ( !/(?:default|named|none)/.test( exportMode ) ) {
|
| 31 | throw new Error( `options.exports must be 'default', 'named', 'none', 'auto', or left unspecified (defaults to 'auto')` );
|
| 32 | }
|
| 33 |
|
| 34 | return exportMode;
|
| 35 | }
|