1.0.5 • Public • Published


Richard Wen

Yargs command for managing config files

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  1. Install Node.js
  2. Install yargs and yargs-command-config via npm
npm install --save yargs yargs-command-config

For the latest developer version, see Developer Install.


Create a file named bin.js with the following contents:

var yargs = require('yargs');
// (config) Load command with path to config JSON file
// Replace './path/to/config.json' with your config JSON file
var config = require('yargs-command-config')({file: './path/to/config.json'});
// (yargs) Add command to manage config file
var argv = yargs.command(config).argv;

Display help options for bin.js using node:

node bin.js config help

The following will be displayed:

bin config <task> [key] [value] [--config]

manage default config

<task> is one of:

* set
* delete
* view
* clear
* reset

Set option to value
> set [key] [value]

Remove default option
> delete [key]

View default options
> view

Clear default options
> clear

Reset default options
> reset

Manage other config file
> set [key] [value] --config other.json
> delete [key] --config other.json
> view --config other.json
> clear --config other.json
> reset --config other.json

    --help	Show help	[boolean]

Default config files are managed with the commands below:

node bin.js config view
node bin.js config clear
node bin.js config reset
node bin.js config set key value
node bin.js config delete key

Other config files are managed by passing a path in the option --config:

node bin.js config view --config config.json
node bin.js config clear --config config.json
node bin.js config reset --config config.json
node bin.js config set key value --config config.json
node bin.js config delete key --config config.json

See Documentation for more details.


Report Contributions

Reports for issues and suggestions can be made using the issue submission interface.

When possible, ensure that your submission is:

  • Descriptive: has informative title, explanations, and screenshots
  • Specific: has details of environment (such as operating system and hardware) and software used
  • Reproducible: has steps, code, and examples to reproduce the issue

Code Contributions

Code contributions are submitted via pull requests:

  1. Ensure that you pass the Tests
  2. Create a new pull request
  3. Provide an explanation of the changes

A template of the code contribution explanation is provided below:

## Purpose

The purpose can mention goals that include fixes to bugs, addition of features, and other improvements, etc.

## Description

The description is a short summary of the changes made such as improved speeds or features, and implementation details.

## Changes

The changes are a list of general edits made to the files and their respective components.
* `file_path1`:
    * `function_module_etc`: changed loop to map
    * `function_module_etc`: changed variable value
* `file_path2`:
    * `function_module_etc`: changed loop to map
    * `function_module_etc`: changed variable value

## Notes

The notes provide any additional text that do not fit into the above sections.

For more information, see Developer Install and Implementation.

Developer Notes

Developer Install

Install the latest developer version with npm from github:

npm install git+https://github.com/rrwen/yargs-command-config

Install from git cloned source:

  1. Ensure git is installed
  2. Clone into current path
  3. Install via npm
git clone https://github.com/rrwen/yargs-command-config
cd yargs-command-config
npm install


  1. Clone into current path git clone https://github.com/rrwen/yargs-command-config
  2. Enter into folder cd yargs-command-config
  3. Ensure devDependencies are installed and available
  4. Run tests
  5. Results are saved to tests/log with each file corresponding to a version tested
npm install
npm test


Use documentationjs to generate html documentation in the docs folder:

npm run docs

See JSDoc style for formatting syntax.

Upload to Github

  1. Ensure git is installed
  2. Inside the yargs-command-config folder, add all files and commit changes
  3. Push to github
git add .
git commit -a -m "Generic update"
git push

Upload to npm

  1. Update the version in package.json
  2. Run tests and check for OK status
  3. Generate documentation
  4. Login to npm
  5. Publish to npm
npm test
npm run docs
npm login
npm publish


The module yargs-command-config uses the following npm packages for its implementation:

npm Purpose
yargs Manage command line arguments and options
fs Read and write JSON config files
 yargs  <-- CLI arguments
  fs    <-- JSON config files



  • Defaults for options.task.file and [--file] are now options.task.config and [--config] respectively


  • Initial release


npm i yargs-command-config

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