github.com/rodrigopetter/go-progress-bar

Go Progress Bar

A simple progress bar implementation for Go applications with support for nested progress bars, stages, and logging integration.

Features

• ⏱️ Built-in timer showing elapsed time
• 📊 Percentage-based progress display
• 🌲 Support for nested progress bars (sub-tasks)
• 📝 Integrated logging support
• 🎯 Stage-based progress tracking
• 📐 Auto-adjusting bar width based on terminal size

Installation

go get github.com/RodrigoPetter/go-progress-bar

Usage

Basic Progress Bar

package main

import (
    "time"
    progressbar "github.com/RodrigoPetter/go-progress-bar"
)

func main() {
    // Create a new progress bar
    bar := progressbar.NewProgressBar("Main Task")
    
    // Start the render loop
    progressbar.StartRenderLoop(bar)

    // Update progress
    for i := 0; i <= 100; i++ {
        bar.Increment(1)
        time.Sleep(100 * time.Millisecond)
    }

    // Mark as complete
    bar.Finish()
}

This code will output the following bar:

⠦[00:00:03] - Main Task - [35% #####          ]

Nested Progress Bars

func main() {
    mainBar := progressbar.NewProgressBar("Main Task")
    subBar1 := mainBar.NewSubBar("Subtask 1")
    subBar2 := mainBar.NewSubBar("Subtask 2")

    progressbar.StartRenderLoop(mainBar)

    // Update progress for different bars
    for i := 0; i <= 100; i++ {
        mainBar.Increment(1)
        subBar1.Increment(2)
        subBar2.Increment(1)
        time.Sleep(100 * time.Millisecond)
    }
}

This code will output the following bar:

⠴[00:00:03] - Main Task - [30% ####           ]
    ⠴[00:00:03] - Subtask 1 - [60% ######     ]
    ⠴[00:00:03] - Subtask 2 - [30% ###        ]

Stage-Based Progress

func main() {
    // Create a progress bar with 5 stages
    bar := progressbar.NewProgressBar("Stage Progress", 
        progressbar.WithStages(5))
    
    progressbar.StartRenderLoop(bar)

    // Progress through stages
    for i := 0; i < 5; i++ {
        time.Sleep(1 * time.Second)
        bar.Increment(1)
    }
}

This code will output the following bar:

⠦[00:00:03] Stage 3/5 - Stage Progress - [60% ##############          ]

Logging Integration

This feature prevents log messages from breaking the progress bar's visual display. Without this integration, log messages would interrupt and corrupt the progress bar's appearance in the terminal.

func main() {
    bar := progressbar.NewProgressBar("Task with Logs")
    
    // Configure the log writer
    // Ensures logs work harmoniously with the progress bar
    log.SetOutput(bar.GetLogWriter())  
    
    progressbar.StartRenderLoop(bar)

    // Logs will be displayed alongside the progress bar
    log.Println("Starting process...")
    for i := 0; i <= 100; i++ {
        bar.Increment(1)
        if i%20 == 0 {
            log.Printf("Completed %d%%", i)
        }
        time.Sleep(100 * time.Millisecond)
    }
    log.Println("Process completed!")
}

This code will output the following bar:

2025/04/21 17:05:56 Starting process...
2025/04/21 17:05:56 Completed 0%
2025/04/21 17:05:58 Completed 20%
2025/04/21 17:06:00 Completed 40%
⠋[00:00:05] - Task with Logs - [55% ##################                ]

Options

The progress bar can be customized using various options:

bar := goprogressbar.NewProgressBar("Custom Bar",
    goprogressbar.WithMaxProgress(200),    // Set custom max progress
    goprogressbar.WithStages(5),           // Use stage-based progress
)