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53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
"use strict";
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const Promise = require("bluebird");
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const createEventEmitter = require("create-event-emitter");
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const defaultValue = require("default-value");
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const mergeMetadata = require("./util/merge-metadata");
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module.exports = function createFileSink(options) {
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let emitter = createEventEmitter({
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__buildStep: "sink",
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displayName: options.displayName,
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supportsAcknowledgment: options.supportsAcknowledgment,
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supportsStreams: options.supportsStreams,
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sink: function (inputFile) {
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let {metadata} = inputFile;
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try {
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let result = options.sink(inputFile);
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if (result != null) {
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return Promise.try(() => {
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return result;
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}).then((extraMetadata = {}) => {
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emitter.emit("sunk", {
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metadata: mergeMetadata(extraMetadata, {
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inputFileMetadata: metadata
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}),
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stream: inputFile.stream,
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contents: inputFile.contents
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});
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}).catch((err) => {
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reportError(inputFile, err);
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});
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}
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} catch (err) {
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reportError(inputFile, err);
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}
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}
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});
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function reportError(inputFile, error) {
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emitter.emit("error", {
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file: inputFile,
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error: error,
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isFatal: error.isFatal,
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step: emitter
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});
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}
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return emitter;
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};
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