node package manager

parameters

Command line arguments parser and stringifier

Build Status

npm install parameters

Node parameters is sugar for parsing typical unix command line options.

  • Standard and commands-based command lines (think git pull ...)
  • Asymetric: parse and stringify
  • Complete tests and samples

Standard command line example

command = parameters({
  name: 'server',
  description: 'Start a web server',
  options: [{
    name: 'host', shortcut: 'h', 
    description: 'Web server listen host'
  },{
    name: 'port', shortcut: 'p', type: 'integer', 
    description: 'Web server listen port'
  }]
});
// Print help 
console.log( command.help() );
// Extract command arguments 
command.parse(
  ['node', 'server.js', '--host', '127.0.0.1', '-p', '80']
).should.eql({
  host: '127.0.0.1',
  port: 80
});
// Create a command 
command.stringify({
  host: '127.0.0.1',
  port: 80
}).should.eql(
  ['--host', '127.0.0.1', '--port', '80']
);

Command-based command line example

command = parameters({
  name: 'server',
  description: 'Manage a web server',
  commands: [{
    name: 'start',
    description: 'Start a web server',
    options: [{
      name: 'host', shortcut: 'h', 
      description: 'Web server listen host'
    },{
      name: 'port', shortcut: 'p', type: 'integer', 
      description: 'Web server listen port'
    }]
  }]
});
// Print help 
console.log( command.help() );
// Extract command arguments 
command.parse(
  ['node', 'server.js', 'start', '--host', '127.0.0.1', '-p', '80']
).should.eql({
  command: 'start',
  host: '127.0.0.1',
  port: 80
});
// Create a command 
command.stringify({
  command: 'start',
  host: '127.0.0.1',
  port: 80
}).should.eql(
  ['start', '--host', '127.0.0.1', '--port', '80']
);

Help usage

Here's an example on how to integrate the help functionnality.

params = parameters(my_config).parse())
if( params.command === 'help' ){
  return console.log(parameters.help(params.command));
}

This will satisfy a help command with or without an extra command such as myscript help and myscript help mycommand.

Development

Tests are executed with mocha. To install it, simple run npm install, it will install mocha and its dependencies in your project "node_modules" directory.

To run the tests:

npm test

The tests run against the CoffeeScript source files.

To generate the JavaScript files:

make build

The test suite is run online with [Travis][travis] against Node.js version 0.6, 0.7, 0.8 and 0.9.

Contributors