67 lines
1.5 KiB
JavaScript
67 lines
1.5 KiB
JavaScript
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/*jshint node:true */
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"use strict";
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var eos = require('end-of-stream');
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var consume = require('stream-consume');
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module.exports = function (task, done) {
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var that = this, finish, cb, isDone = false, start, r;
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finish = function (err, runMethod) {
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var hrDuration = process.hrtime(start);
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if (isDone && !err) {
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err = new Error('task completion callback called too many times');
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}
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isDone = true;
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var duration = hrDuration[0] + (hrDuration[1] / 1e9); // seconds
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done.call(that, err, {
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duration: duration, // seconds
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hrDuration: hrDuration, // [seconds,nanoseconds]
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runMethod: runMethod
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});
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};
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cb = function (err) {
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finish(err, 'callback');
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};
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try {
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start = process.hrtime();
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r = task(cb);
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} catch (err) {
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return finish(err, 'catch');
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}
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if (r && typeof r.then === 'function') {
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// wait for promise to resolve
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// FRAGILE: ASSUME: Promises/A+, see http://promises-aplus.github.io/promises-spec/
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r.then(function () {
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finish(null, 'promise');
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}, function(err) {
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finish(err, 'promise');
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});
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} else if (r && typeof r.pipe === 'function') {
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// wait for stream to end
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eos(r, { error: true, readable: r.readable, writable: r.writable && !r.readable }, function(err){
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finish(err, 'stream');
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});
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// Ensure that the stream completes
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consume(r);
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} else if (task.length === 0) {
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// synchronous, function took in args.length parameters, and the callback was extra
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finish(null, 'sync');
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//} else {
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// FRAGILE: ASSUME: callback
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}
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};
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