@dreipol/dreiup
Command line interface to kick-start dreipol projects
Last updated 8 days ago by gianlucaguarini .
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dreiup-cli

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Requirements

  1. node >=10.0
  2. npm >=6

Installation

Install this package globally on your machine

npm i @dreipol/dreiup -g

Usage

All the available cli features can be listed using the following command

dreiup --help

Technologies

Core Modules

commander A library to create CLI subcommands and handles option parsing

Inquirer Handles user props. This way we can minimize the amount of options required for a command And give the user a simpler experience.

Testing Modules

Mocha Test runner module to execute our tests

Chai Assertion library that works with any testrunner

Commands

create <projectName>

dreiup create <projectName> will create a new project. It will generate a sub folder in the current directory with the given project name and install the template from dreiup-templates from the master branch. In case you need another branch to be used, you can add the option -b <branchName> or --branch <branchName>. Or you can specify a template source directory with -t <path> or --template <path>. This will not fetch any data from the remote repo, but will use the given path as a template source folder and will then install it's content into the projectName subfolder

setup

dreiup setup creates the ~/.dreiup.json file in your home directory storing your private global variables. Your ~/.dreiup.json file will look something like:

{
	"GITHUB_OAUTH_TOKEN": "1d5723BLABLABLA1a9c6c30"
}

Development

To see if everything behaves correctly you can link this repo with npm link. This exposes the dreiup cli command that is then linked directly into this directory instead of the global module installation

Structure

Module Structure

    - src
        - commands
        - cli
    - test
  • src core functionality used to "boot" the cli, load commands and config and so on. Logic shared between the commands can also be placed here.
  • src/commands contains all available commands
  • src/util helper functions that can be shared across several files
  • src/index.js Logic that is dedicated to the CLI boot is placed here. Like loading files & config and so on
  • test location to add the unittest for the files within src

Command Structure

    - commands
        - <COMMAND_NAME>
            - command.js
            - index.spec.js
            - prompt.js
            - index.js
  • commands Folder containing all available commands
  • <COMMAND_NAME> Folder containing a single command. This name should correspond to the name available in the cli
  • command.js The command initialisation. This file is autoloaded to expose the command and its description
  • index.spec.js Containing all unittests for the command logic within index.js
  • prompt.js Prompts spawned by the command
  • index.js Contains the main logic of the command. All logic is here to make the command as testable as possible

Create a new Command

  1. Create a new folder with the command name. In this case we will use foo

  2. Create the command file index.command.js which will register a new command. This file should export a function.

    import program from 'commander';
    import foo from './index.js';
    
    export default function() {
        program
            .command('foo <name>')
            .alias('f')
            .description('Example foo command')
            .action(async (name) => {
                await foo(name)
            });
    };
    
  3. Create the spec file index.spec.js. Within this file, the logic from index.js will be tested

  4. Add the index.js. Within this file all the logic should be placed so the index.command.js only has to call one function from this file, pass all parameters and that's it.

Use inquirer within a command

In order to let the user make more decisions, we simply wrap the main logic from index.js into another function.

Example before

export default function foo(config, name) {
    console.log(`Foo bar ${name}`);
};

Example with inquirer

import inquirer from 'inquirer';

function foo(config, name, gender) {
    console.log(`Foo bar ${gender} ${name}`);
}

export default function (config, name) {
    return inquirer
        .prompt([
            {
                type: 'list',
                name: 'gender',
                message: 'Select gender',
                choices: ['male', 'female']
            }
        ])
        .then(({gender}) => {
            return foo(config, name, gender);
        });
};

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