Tilda NPM | npm.io

tilda

Tiny module for building command line tools.

Features

Human readable syntax and easy to use
Supports custom options and commands
Auto parse the command line arguments
Supports reading the stdin data
Opens prompts in the command line if the value is required but was not provided

:cloud: Installation

# Using npm
npm install --save tilda

# Using yarn
yarn add tilda

:clipboard: Example

#!/usr/bin/env node

// ./index.js -f tux 'Hello World!'
//  ______________
// < Hello World! >
//  --------------
//    \
//     \
//         .--.
//        |o_o |
//        |:_/ |
//       //   \ \
//      (|     | )
//     /'\_   _/`\
//     \___)=(___/
//
// Help output
// -----------
//
// ./index.js --help
// Usage: cowsay <command> <text> [options]
//
// Configurable speaking cow (and a bit more)
//
// Commands:
//   list  List the cow templates.
//
// Options:
//   -e, --eye <str>      The eye string.
//   -T, --tongue <str>   The tongue string.
//   -f, --cowfile <cow>  The cowfile.
//   -v, --version        Displays version information.
//   -h, --help           Displays this help.
//
// Examples:
//   $ cowsay 'Hello there!'
//   $ cowsay -e '*-' 'Heyyy!
//   $ cowsay -T '++' 'I have a nice tongue!
//
// Well, this is just a tiny example how to use Tilda.
// Documentation can be found at https://github.com/IonicaBizau/tilda.

"use strict";

const Tilda = require("tilda")
    , cowsay = require("cowsay")
    ;

let p = new Tilda({
    name: "cowsay"
  , version: "1.0.0"
  , description: "Configurable speaking cow (and a bit more)"
  , documentation: "https://github.com/IonicaBizau/tilda"
  , examples: [
        "cowsay 'Hello there!'"
      , "cowsay -e '*-' 'Heyyy!"
      , "cowsay -T '++' 'I have a nice tongue!"
    ]
  , notes: "Well, this is just a tiny example how to use Tilda."
  , args: [{
        name: "text"
      , type: String
      , desc: "The text to display."
      , stdin: true
    }]
}, {
    stdin: true
}).option([
    {
        opts: ["eye", "e"]
      , desc: "The eye string."
      , name: "str"
    }
  , {
        opts: ["tongue", "T"]
      , desc: "The tongue string."
      , name: "str"
    }
  , {
        opts: ["cowfile", "f"]
      , desc: "The cowfile."
      , name: "cow"
      , default: "default"
    }
]).action([
    {
        name: "list"
      , desc: "List the cow templates."
      , options: [
            {
                opts: ["list", "l"],
                desc: "Display as list",
            }
        ]
    }
]).on("list", action => {
    cowsay.list((err, list) => {
        if (err) { return this.exit(err); }
        let str = list.join(action.options.list.is_provided ? "\n" : ", ")
        console.log(str);
    });
}).main(action => {
    console.log(cowsay.say({
        text: action.stdinData || action.args.text || " "
      , e: action.options.eye.value
      , T: action.options.tongue.value
      , f: action.options.cowfile.value
    }));
});

:question: Get Help

There are few ways to get help:

Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.
For bug reports and feature requests, open issues. :bug:
For direct and quick help, you can use Codementor. :rocket:

:memo: Documentation

`TildaOption(input)`

The TildaOption class used for creating option objects.

Params

Object input: An object containing the following fields:
name (String): The option name (optional).
description (String): The option description.
opts (Array): An array of aliases (e.g. ["age", "a"]).
default (Anything): The default value.
handler (Function): The option handler which will be called when the option is found in the arguments. The first parameter is the option object and the second argument is the action where the option belongs to.
required (Boolean): A flag representing if the option is mandatory or not (default: false).
type (Class|String): The type class (e.g. String) or its stringified representation (e.g. "string").
prompt (Boolean|Object): If false, it will disable the prompt even if the option is required. If it's an object, it will passed as options to prompt-sync.

Return

TildaOption The TildaOption instance.
description (String): The option description.
opts (Array): An array of aliases (e.g. ["age", "a"]).
aliases (Array): An array of strings containing the computed aliases, the single letter ones being the first (e.g. ["-n", "--name"]).
value (null|String|DefaultValue): The option value which was found after processing the arguments.
def (Anything): The provided default value.
is_provided (Boolean): A flag if the option was or not been provided.
handler (Function): The handler function.
required (Boolean): The required value.
type (Class|String): The option value type.
prompt (Boolean|Object): The prompt settings..

`TildaAction(info, options)`

The TildaAction class used for creating action objects.

This is extended EventEmitter.

Params

String|Object info: The path to a containing the needed information or an object containing:
description|desc (String): The action description.
name (String): The action name.
bin (Object): A package.json-like bin field (optional).
args (Array): An array of strings/objects representing the action argument names (default: []).
examples (Array): An array of strings containing examples how to use the action.
notes (String): Additional notes to display in the help command.
documentation (String): Action-related documentation.
Object options: An object containing the following fields (if provided, they have priority over the info object):
args (Array): An array of strings/objects representing the action argument names (default: []).
examples (Array): An array of strings containing examples how to use the action.
notes (String): Additional notes to display in the help command.
documentation (String): Action-related documentation.

Return

TildaAction The TildaAction instance containing:
options (Object): The action options.
description (String): The action description.
name (String): The action name.
uniqueOpts (Array): An array of unique options in order.
_args (Array): The action arguments.
argNames (Array): The action argument names.
args (Object): The arguments' values.
examples (Array): An array of strings containing examples how to use the action.
notes (String): Additional notes to display in the help command.
documentation (String): Action-related documentation.
stdinData (String): The stdin data.

`readInfo(info)`

Converts the info input into json output.

Params

String|Object info: The info object or path to a json file.

Return

Object The info object.

`option(input)`

Adds one or more options to the action object.

Params

Array|Object input: An array of option objects or an object passed to the TildaOption class.

`Tilda(info, options)`

Creates the parser instance.

Params

Object info: The info object passed to TildaAction.
Object options: The options passed to TildaAction, extended with:
defaultOptions (Array): Default and global options (default: help and version options).
argv (Array): A cutom array of arguments to parse (default: process arguments).
stdin (Boolean): Whether to listen for stdin data or not (default: false).

Return

Tilda The Tilda instance containing:
actions (Object): An object containing the action objects.
version (String): The version (used in help and version outputs).
argv (Array): Array of arguments to parse.
_globalOptions (Array): The global options, appended to all the actions.
actionNames (Array): Action names in order.

`globalOption(input)`

Adds a global option for all the actions.

Params

Array|Object input: The option object.

`action(input, opts)`

Adds a new action.

Params

Object input: The info object passed to TildaAction.
Array opts: The action options.

`exit(msg, code)`

Exits the process.

Params

String|Object msg: The stringified message or an object containing the error code.
Number code: The exit code (default: 0).

`parse()`

Parses the arguments. This is called internally.

This emits the action names as events.

`displayVersion()`

Returns the version information.

Return

String The version information.

`displayHelp(action)`

Displays the help output.

Params

TildaAction action: The action you want to display help for.

`main(cb)`

Append a handler when the main action is used.

Params

Function cb: The callback function.

`convertTo(classConst, input, opts)`

Converts an input into a class instance.

Params

Class classConst: The class to convert to.
Object|Array input: The object info.
Object opts: The options object (optional).

Return

TildaAction|TildaOption The input converted into a class instance.

:yum: How to contribute

Have an idea? Found a bug? See how to contribute.

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