@clitools/base NPM

@clitools/base

Base module for writing advanced shell scripts with Node.js.

At it's core it uses Yargs for option and parameter parsing, so it's a good idea to look at that documentation first.

Features

The target is to have a base module for writing Linux shell scripts, with APIs for most common CLI tasks, like:

Parsing command line optionsa and arguments (cli.js, using: Yargs)
Bash completion script generation (cli.js, using: Yargs)
User configuration file management (config.js)
Access to system key management for secure storage of credentials (Plugin: @clitools/keystore)
Error handling (error-handler.js)
Debug mode, different verbosity levels (error-handler.js, ui.js)
Silent mode (ui.js)
Integrates request for API calls, crawling, downloading, etc. (request.js)
Consistent, formatted cli text output (ui.js, using: Chalk, columnify, cli-progress)

Install

$ npm i --save @clitools/base
[...]

Example

example-tool:

#!/usr/bin/env node

require('./lib/cli');


cli.program
    .command('test <param>', 'Example command', (program) => {
        program
            .positional('param', {
                description: 'Test parameter'
            });
    }, ({ param }) => {
        cli.ui.startProgress('Test...');
        return cli.promises.throttle([
            () => Promise.resolve(param),
            () => Promise.resolve('A'),
            () => Promise.resolve('B'),
            () => Promise.resolve('C'),
            () => Promise.resolve('D'),
            () => Promise.resolve('E'),
            () => Promise.resolve('F'),
            () => Promise.resolve('G'),
            () => Promise.resolve('H'),
            () => Promise.resolve('I'),
            () => Promise.resolve('X')
        ], 1000, (p) => {
            cli.ui.updateProgress(p);
        })
            .then((result) => {
                cli.ui.stopProgress();
                cli.ui.print(result);
            });
    });

cli.run();

Output:

$ ./example-tool
Usage:
example-tool <command>

Commands:
  example-tool test <param>  Example command
  example-tool completion    generate bash completion script

Options:
  -v, --verbose  Show more information                      [count]
  -s, --silent   No output                                  [boolean]
  -d, --debug    Debug mode (stacktraces, very verbose)     [boolean]
  -h, --help     Show help                                  [boolean]
  -V, --version  Show version number                        [boolean]


Error:
Not enough non-option arguments: got 0, need at least 1