Terminal Spinner library for .NET Core/Standard. strongly inspired by cli-spinners, ora, CLISpinner.

When running on terminal using non-Unicode codepages (e.g. CP437:EN-US, CP932:JA-JP), the library will render using ASCII-characters spinner by default.

• fig. Left:Command Prompt (CP932) / Right:mintty (UTF-8 on Linux)
  

NOTE: Sadly, today's almost Windows are configured as using non-Unicode (UTF-8) code page and "Command Prompt" doesn't support font fallback yet.☹ If you want to see non-ASCII spinners, you can change the code page either by System.Console.OutputEncoding = System.Text.Encoding.UTF8 or by running chcp 65001 command and then use ConEmu or mintty to display the fallback font.

• See: Screenshot: cmd vs ConEmu on Windows 10(EN-US)

For example, you can see just a result text when runs on CI.

Install-Package Kurukuru

dotnet add package Kurukuru

Just add using Kurukuru; then call Spinner.Start with some delegate.

Spinner.Start("Processing...", () =>
{
    Thread.Sleep(1000 * 3);
    
    // MEMO: If you want to show as failed, throw a exception here.
    // throw new Exception("Something went wrong!");
});

Spinner.Start("Stage 1...", spinner =>
{
    Thread.Sleep(1000 * 3);
    spinner.Text = "Stage 2...";
    Thread.Sleep(1000 * 3);
    spinner.Fail("Something went wrong!");
});

You can also use async method pattern. Use StartAsync method.

await Spinner.StartAsync("Processing...", async () =>
{
    await Task.Delay(1000 * 3);
    
    // MEMO: If you want to show as failed, throw a exception here.
    // throw new Exception("Something went wrong!");
});

await Spinner.StartAsync("Stage 1...", async spinner =>
{
    await Task.Delay(1000 * 3);
    spinner.Text = "Stage 2...";
    await Task.Delay(1000 * 3);
    spinner.Fail("Something went wrong!");
});

• Start / StartAsync: Create and start new spinner. And it waits specified action.
  • void Start(string text, Action<Spinner> action, Pattern pattern = null, Pattern fallbackPattern = null)
  • void Start(string text, Action<Spinner> action, Pattern pattern = null, Pattern fallbackPattern = null)
  • Task StartAsync(string text, Func<Task> action, Pattern pattern = null, Pattern fallbackPattern = null)
  • Task StartAsync(string text, Func<Spinner, Task> action, Pattern pattern = null, Pattern fallbackPattern = null)
    • text: a text to display while running action.
    • action: a long-running action.
    • patterns: Use spinner pattern (see Patterns class). Default value is Patterns.Dot. You can find a pattern you like in the preview of cli-spinners.
    • fallbackPattern: Use spinner pattern if console's codepage is non-Unicode. Default value is Patterns.Line.

• Stop: Stop spinner and show a result if needed.
  • Stop(string text = null, string symbol = null, ConsoleColor? color = null)
  • Stop(string text, string symbol, ConsoleColor? color, string terminator)
• Success: Show result as ✔ success. (equivalent to Stop method)
• Fail: Show result as ✖ failure. (equivalent to Stop method)
• Warning: Show result as ⚠ warning. (equivalent to Stop method)
• Info: Show result as ℹ information. (equivalent to Stop method)

• Text: Get or set a text to display while running action.
• Color: Get or set a color of the spinner. (not for text)

• cli-spinners: Spinners for use in the terminal (node.js)
• ora: Elegant terminal spinner (node.js)
• CLISpinner: Swifty Terminal Spinner

MIT License.