51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
// Duplicate the code from `run-async.js` but as synchronous functions
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export const pushChunksSync = (getChunksSync, getChunksArguments, transformStream, done) => {
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try {
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for (const chunk of getChunksSync(...getChunksArguments)) {
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transformStream.push(chunk);
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}
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done();
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} catch (error) {
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done(error);
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}
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};
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// Run synchronous generators with `execaSync()`
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export const runTransformSync = (generators, chunks) => [
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...chunks.flatMap(chunk => [...transformChunkSync(chunk, generators, 0)]),
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...finalChunksSync(generators),
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];
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export const transformChunkSync = function * (chunk, generators, index) {
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if (index === generators.length) {
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yield chunk;
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return;
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}
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const {transform = identityGenerator} = generators[index];
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for (const transformedChunk of transform(chunk)) {
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yield * transformChunkSync(transformedChunk, generators, index + 1);
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}
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};
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export const finalChunksSync = function * (generators) {
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for (const [index, {final}] of Object.entries(generators)) {
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yield * generatorFinalChunksSync(final, Number(index), generators);
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}
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};
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const generatorFinalChunksSync = function * (final, index, generators) {
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if (final === undefined) {
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return;
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}
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for (const finalChunk of final()) {
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yield * transformChunkSync(finalChunk, generators, index + 1);
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}
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};
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const identityGenerator = function * (chunk) {
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yield chunk;
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};
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