Progress bar

Learn progress bars with cli_util.

The cli_util package

cli_util provides helper utilities for Dart CLI applications. You get the configuration directory with applicationConfigHome, the terminal width with terminalWidth, and colored output with AnsiCode.

Example: import 'package:cli_util/cli_util.dart'; final config = applicationConfigHome; final width = terminalWidth;. applicationConfigHome returns a different path depending on the operating system (~/.config on Linux, ~/Library/Application Support on macOS). This is the standard place to store CLI tool configuration.

Terminal width

terminalWidth gives the number of columns in the terminal window. When printing a progress bar or a table you align the output to this width. Example: final w = terminalWidth; print('Width: $w');.

applicationConfigHome gives the configuration directory. A CLI tool stores its settings here. Example: final config = applicationConfigHome;. This is the way to keep user-specific data in a standard place; it gives the right directory on each operating system.

Exercise Print cli_util info

Add import 'package:cli_util/cli_util.dart';. In main add print('cli_util: CLI helpers'), print('API: applicationConfigHome') and print('API: terminalWidth').

Show example solution

import 'package:cli_util/cli_util.dart';

void main() {
  print('cli_util: CLI helpers');
  print('API: applicationConfigHome');
  print('API: terminalWidth');
}

Test yourself

What does cli_util provide?
- HTTP client
- CLI helpers
- Database
- Network client
Show answer

CLI helpers — cli_util provides helpers for CLI applications.
Match the cli_util parts

cli_util

CLI helper
applicationConfigHome

Config dir
terminalWidth

Terminal width
AnsiCode

Color

Accessing terminalWidth

final width = ____;

Show answer

final width = terminalWidth;

Next lesson: dcli

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