| 1 | import Promise from 'es6-promise/lib/es6-promise/promise.js';
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| 2 |
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| 3 | export default function transform ( source, id, transformers ) {
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| 4 | let sourceMapChain = [];
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| 5 |
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| 6 | if ( typeof source === 'string' ) {
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| 7 | source = {
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| 8 | code: source,
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| 9 | ast: null
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| 10 | };
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| 11 | }
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| 12 |
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| 13 | let originalCode = source.code;
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| 14 | let ast = source.ast;
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| 15 |
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| 16 | return transformers.reduce( ( promise, transformer ) => {
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| 17 | return promise.then( previous => {
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| 18 | return Promise.resolve( transformer( previous, id ) ).then( result => {
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| 19 | if ( result == null ) return previous;
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| 20 |
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| 21 | if ( typeof result === 'string' ) {
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| 22 | result = {
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| 23 | code: result,
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| 24 | ast: null,
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| 25 | map: null
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| 26 | };
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| 27 | }
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| 28 |
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| 29 | sourceMapChain.push( result.map );
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| 30 | ast = result.ast;
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| 31 |
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| 32 | return result.code;
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| 33 | });
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| 34 | });
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| 35 |
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| 36 | }, Promise.resolve( source.code ) )
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| 37 |
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| 38 | .then( code => ({ code, originalCode, ast, sourceMapChain }) );
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| 39 | }
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