progress-estimator

Logs a progress bar and estimation for how long a Promise will take to complete. This library tracks previous durations in order to provide more accurate estimates over time.

Demo

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Installation

# use npm
npm install progress-estimator

# use yarn
yarn add progress-estimator

Usage example

const createLogger = require('progress-estimator');
const { join } = require('path');

// All configuration keys are optional, but it's recommended to specify a storage location.
// Learn more about configuration options below.
const logger = createLogger({
  storagePath: join(__dirname, '.progress-estimator'),
});

async function run() {
  await logger(promiseOne, "This is a promise");
  await logger(
    promiseTwo,
    "This is another promise. I think it will take about 1 second",
    {
      estimate: 1000
    }
  );
}

API

`createLogger(optionalConfiguration)`

This method is the default package export. It creates and configures a logger function (documented below). The following configuration options are supported. (They apply only to the logger instance that's returned.)

name	type	Description
`logFunction`	Function	Custom logging function. Defaults to `log-update`. Must define `.done()` and `.clear()` methods.
`spinner`	object	Which spinner from the `cli-spinners` package to use. Defaults to `dots`.
`storagePath`	string	Where to record durations between runs. Defaults to `os.tmpdir()`.
`theme`	object	Custom `chalk` theme. Look to the default theme for a list of required keys.

`logger(promise, labelString, options)`

This method logs a progress bar and estimated duration for a promise. It requires at least two parameters– a Promise and a label (e.g. "Running tests"). The label is SHA1 hashed in order to uniquely identify the promise.

An optional third parameter can be provided as well with the following keys:

name	type	Description
`estimate`	Number	Estimated duration of promise. (This value is used initially, until a history of actual durations have been recorded.)
`id`	String	Uniquely identifies the promise. This value is needed if the label string is not guaranteed to be unique.

0.2.0

Configuration function returns a configured logger, enabling custom configurations for multiple logger use cases.

Configuration supports optional custom logging function. Default implementation will continue to use the log-update package.

Log function replaces third parameter (previously the estimated duration) with an optional configuration object supporting multiple values (estimated duration and unique id).

0.1.2

Moved percentage label (e.g. "35%") inside of progress bar to save horizontal space.

Changed format of time from estimated duration (e.g. "3.2 sec estimated") to include elapsed time (e.g. "1.5s, estimated 3.2s"). This new label format was inspired by the Jest test runner.

Added estimateExceeded key to theme for when elapsed duration exceeds the estimated duration.

Added TypeScript type defs to published lib.

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