Merges one or more YAML files into a base file.

Usage

mermal is available on NPM.

mermal provides an API as well as a CLI.

Install

# Locally
$ yarn add mermal   # Using yarn
$ npm install mermal    # Using npm

# Or globally
$ yarn global add mermal   # Using yarn
$ npm install -g mermal    # Using npm

API

All API methods returns with a promise.

Example

import * as merge from 'mermal';

const base = `a:
  b1: b1
  b2: b2`;

const override = `a:
  b1: b3
c:
  d1: d1`;

merge.toYaml(base, override)
  .then(console.log);

/**
 * Log will read:
    a:
      b1: b3
      b2: b2
    c:
      d1: d1
 */

Available Methods

toFile

toJson

toYaml

CLI

Example

$ mermal -b base.yaml -s sub/ -o out.yaml

Options

-b, --base <baseFile>     Path to the base YAML file where other files will be merged into
-o, --out <outFile>       Path to the YAML file that will be exported to. It will override any existing files
-s, --search <searchDir>  A directory that will be searched for
-h, --help                output usage information

See mermal --help for more options.

Comparison with other packages

• merge-yaml
  • Lacks extensive testing
  • Throws error if the file could not be found
  • Must specify the path of every file
• swagger-yaml
  • Not available as a CLI
  • Opinionated about where you place your source files

TODO

• Improve Tests
• More tests
• Handle edge cases