1.1.5 • Public • Published


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    Well oiled terminal apps

    Termoil is built on the simple concept of recursive references to the Termoil object. You create your main instance and then include sub instances (SubRoutines).

    npm install --save termoil

    Include the module

    var Termoil = require('termoil');

    Create your app

    var myapp = new Termoil;

    Add app name

    myapp.name('Termoil App');

    Add usage instructions

    Usage info is shown when no options are passed or when passing -h, -H and --help

    myapp.instructions('myapp [options]');

    Add version info

    Termoil allows you to associate multiple versions with your app and define the current active version. Right now the software only makes use of the active version info

    myapp.addVersion(new Termoil.Version('1.0', true)) //add active version 1.0

    Version is shown by calling -v, -V and --version

    Add options

    myapp.addOption(new Termoil.Option(['-n', '-N', '--name'], 'userName', new Termoil.Option.Type('value', true), 'User name field', 'John Smith', function(val){ return val.toLowerCase(); }));

    The Option Object:

    The option object is the most complex, customizable and useful class in the Termoil library. It extends the Argument class, which handles processing any arguments passed through process.argv

    Check out the Argument api for details on options: https://doclets.io/the-letter-e-production/termoil/master#dl-Argument

    Option Args: new Termoil.Option(keys, name, type, description, default, filter);

    • keys - An array of (n) allowed keys
      • var keys = ['-n', '-N', '--name'];
    • name - The property name of this argument
      • var name = 'name';
    • type - Option type: (required|optional|flag)
      • var type = 'required';
      • required - This option must have a value passed after it
      • optional - This option may have a value passed after it, otherwise it will use the default value
      • flag - Flags are booleans, if passed they result in truth
    • description - A description for the option, used in help page
      • var description = 'My description';
    • default - A default value in the event no value is passed
      • var default = 'Default Value';
    • filter - A function to pass the option value through
      • var filter = function(val){ return parseInt(val); };

    The Option Type Object:

    The option type object allows you to determine the behavior of each option.

    Option Type Args: new Termoil.Option.Type(key, required, repeating);

    • key - The type of option to be used. Either 'value' or 'flag'.
      • value - An option that accepts a value
      • flag - An option that returns true when set
    • required - A boolean used for value options to denote a required to be passed after the option
    • repeating - A boolean used for value options to denote multiple values may be passed after the option
      • repeating values will be stored in an array

    Add A SubRoutine

    There is no limit to how deep you can nest sub routines (inception style)

    var mysubapp = new Termoil;
        //define all app options here
    myapp.addSubRoutine(new Termoil.SubRoutine(['sub'], 'sub', mysubapp));

    Usage info will show for subroutines with no options passed as well

    myapp sub; #this will show usage info for mysubapp

    Parse Argv

    myapp.parse(Termoil.Skip(process.argv, 2));

    You only need to call .parse on your main app. Parsing of options for SubRoutines will be handled automatically

    Options will cascade through SubRoutines. However, they will not be available upstream. mysubapp gets a copy of options from myapp, but myapp doesn't see options passed to mysubapp

    Use Options

    There are two main ways to make use of options

    1. After calling parse - You can simply access the options using the Termoil getters after you've called .parse, since it's a synchronous method. This method can be annoying as you will have to write your own conditionals to handle whether or not options were in fact parsed or SubRoutines got called.
    2. Attach to the .on('parsed') event - This is recommended as it will only run the callback if your app actually had options passed to it.
    //after parse example
    myapp.parse(Termoil.Skip(process.argv, 2));
    //on event example
    myapp.on('parsed', function(){
    }).parse(Termoil.Skip(process.argv, 2));

    Using the .on('parsed') callback will allow you to access the instance of your Termoil Object using this

    Helper Methods

    There are 3 main helper methods you should use to make scripting with termoil easier

    1. .get - Get option(s)
    2. .has - Check for existence of option
    3. .has_all - Check for existence of options
    myapp.on('parsed', function(){
        //get example
        var myopt = this.get('myopt'); //return option if exists, else returns false
        var opts = this.get(); //return json object of all options
        //has example
        var boolean = this.has('myopt'); //returns true if option exists, else returns false
        var boolean = this.has('myopt', function(myopt){ //returns callback if myopt exists
            console.log(myopt); //value of myopt
        }); //still returns same boolean
        //has all example
        var boolean = this.has_all(['myopt', 'youropt']); //return true if both opts exist, else return false
        var boolean = this.has_all(['myopt', 'youropt'], function(myopt, youropt){ //returns callback if both opts exist
            console.log(myopt, youropt); //values of myopt and youropt
        }); //still returns same boolean
    }).parse(Termoil.Skip(process.argv, 2));

    New Features Roadmap

    You can find a list of enhancements that are on the roadmap by clicking here

    Questions, Comments

    We hope this documentation is sufficient to get you started with Termoil. However, if you have any questions or require help please open a ticket on GitHub

    Built under the ISC License


    npm i termoil

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