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34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
"use strict";
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const debug = require("debug")("promistream:from-node-stream:writable");
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const isStdioStream = require("../is-stdio-stream");
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module.exports = function writeToStream(stream, value) {
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if (!isStdioStream(stream)) {
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let canWriteMore = stream.write(value);
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if (canWriteMore) {
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debug("Stream can accept more data");
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return;
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} else {
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debug("Stream is backed up, waiting for drain event...");
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// TODO: Use p-event instead?
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return new Promise((resolve, _reject) => {
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stream.once("drain", () => {
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debug("Drain event received");
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resolve();
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});
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});
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}
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} else {
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// NOTE: According to the `stream-to-pull-stream` code, stdout/stderr behave differently from normal streams, and the `drain` event doesn't work correctly there. So instead, we use the flush callback to know when to write the next bit of data.
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return new Promise((resolve, _reject) => {
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stream.write(value, (_error) => {
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// NOTE: We ignore any errors here, and wait for them to be thrown in the `error` event, to simplify the logic.
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resolve();
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});
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});
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}
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};
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