dcli

Learn advanced CLI with dcli.

The dcli package

dcli is a powerful CLI framework for Dart. It provides shell command execution, file operations, environment variables and more. It is imported with import 'package:dcli/dcli.dart';.

Example: 'ls'.run; runs a shell command. env['HOME'] reads an environment variable. touch('file.txt') creates a file. dcli is the Dart equivalent of bash scripts; it makes writing system administration tools in Dart easy.

Running shell commands

With dcli a shell command runs as 'command'.run. This sends a Dart string to the shell. Example: 'echo hello'.run; prints 'hello' to the screen.

An environment variable is read with env['VAR']. Example: final home = env['HOME']. This gives the user's home directory. The power of dcli is that you can mix shell commands and Dart code seamlessly; you write system scripts as readable Dart code.

Exercise Print dcli info

Add import 'package:dcli/dcli.dart';. Define a function runShell with a 'ls'.run call and an env['HOME'] access inside. In main add print('dcli: CLI framework').

Show example solution

import 'package:dcli/dcli.dart';

void runShell() {
  'ls'.run;
  final home = env['HOME'];
}

void main() {
  print('dcli: CLI framework');
}

Test yourself

The dcli import

import 'package:____/dcli/dcli.dart';

Show answer

import 'package:dcli/dcli/dcli.dart';

Match the dcli parts

dcli

CLI framework
'ls'.run

Shell command
env

Environment vars
touch

Creates a file
What does dcli run?
- Web server
- Database
- Shell commands
- Mobile app
Show answer

Shell commands — dcli runs shell commands.

Next lesson: Summary - CLI

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