Features

• Start/Stop
• Customizable character sets (spinners)
• Custom spinner color, background
• Custom spinner text
• Restarting and reversing the spinner
• Prefixed text, symbol and padding before the spinner
• Changing spinner settings while it is active
• Getting the spinner settings values
• Chain, pipe or redirect output
• Shows the seconds elasped since the spinner started (can be disabled)
• Ability to Stop and persist the spinner with custom text and a symbol
• Pre-built Succeed, Fail and Info functions that stops and persists the spinner with pre-defined cross-platform symbol and text

Usage

import "github.com/AnishDe12020/spintron"

func main() {
	s := spintron.New(spintron.Options{
		Text: "Working...",
	})

	s.Start() // Starts the spinner with the initial text
	// Some work that will take time. E.g. Downloading a file. Let us have a dummy
	// function for now
	err := DownloadFile()

	if err != nil {
		s.Fail("Failed to download the file") // Stops the spinner and shows a error sign with the given text
	} else {
		s.Success("Downloaded the file successfully") // Stops the spinner and shows a success sign with the given text
	}
}

Options

When a new spinner is created, it can be created with a struct of options. Here are the ones available -

Color (string) (default: cyan)

The color of the spinner

Text (string)

The text after the spinner

HideCursor (bool) (defaukt: true)

Hide the cursor or not

Symbol (string)

A symbol that will come before the prefix text

PrefixText (string)

Text that will come before the spinner

CharacterSet (string) (default: dots2)

Character set used for the spinner

Writer (io.Writer) (default: color.Output)

stdOut writer

Delay (time.Duration) (default: 100 ms)

Delay between frames in the character set

Padding (int)

Number of chatacters in padding on the left of the spinner

DisableElaspedSeconds (bool) (default: false)

Disable the elasped seconds timer

Examples

Reversing the spinner

time.Sleep(time.Second * 2) // Simulate a long running process
s.Reverse() // Reverse the spinner's character set
s.Text = "I have been reversed"
time.Sleep(time.Second * 2) // Simulate a long running process
s.Stop() // Stops the spinner

Updating the spinner color

time.Sleep(time.Second * 2)                // Simulate a long running process
s.UpdateCharSet(spintron.CharSets["moon"]) // Update spinner to use a different character set
s.Text = "My character set has been updated"
time.Sleep(time.Second * 2) // Simulate a long running process
s.Stop()                    // Stops the spinner

Updating the spinner speed

time.Sleep(time.Second * 2)                         // Simulate a long running process
s.UpdateSpeed(time.Duration(50) * time.Millisecond) // Update spinner to use a different speed, here making it twice that of the default speed
s.Text = "My speed has been updated to make me faster"
time.Sleep(time.Second * 2) // Simulate a long running process
s.Stop()                    // Stops the spinner

Adding padding to the spinner

time.Sleep(time.Second * 2) // Simulate a long running process
s.Padding = 10              // Add a padding of 10 characters to the left of the spinner
s.Text = "My padding has been updated"
time.Sleep(time.Second * 2) // Simulate a long running process
s.Stop()                    // Stops the spinner

Stop and persist the spinner

time.Sleep(time.Second * 2)   // Simulate a long running process
s.StopAndPersist("👀", "Heya") // Stops the spinner and persists it with a custom symbol and text

Succeeding, Failing or stopping the spinner with an info message

s.Succeed("Done!") // Stops the spinner and persists it with a success sign and message

s.Fail("Uh oh! Something went wrong!") // Stops the spinner and persists it with an error sign and message

s.Info("Star the repo") // Stops the spinner and persists it with an info sign and message

Credits

All commits uptil 561dc95 are made by Brian Downs and the contributors to the original repository, briandowns/spinner. The project has since been renamed to Spintron to differentiate from the original project.

This is a fork of the original Go Spinner repository Brian Downs licensed under Apache 2.0.