alog

alog

An opinionated slog handler.

Features

• JSON logging with customizable attributes
• Configurable output, log level, and source inclusion
• Contextual logging support
• No external dependencies

Installation

To install the package, run:

go get github.com/arthurdotwork/alog

Usage

Basic Usage

package main

import (
    "github.com/arthurdotwork/alog"
    "log/slog"
)

func main() {
    logger := alog.Logger()
    logger.Info("This is an info message")
}

Set as default

You can set the logger as the default logger:

package main

import (
    "github.com/arthurdotwork/alog"
    "log/slog"
)

func main() {
    slog.SetDefault(alog.Logger())
    slog.Info("This is an info message")
}

Custom Options

You can customize the logger by providing options:

package main

import (
    "bytes"
    "github.com/arthurdotwork/alog"
    "log/slog"
)

func main() {
    var buf bytes.Buffer
    logger := alog.Logger(
        alog.WithOutput(&buf),
        alog.WithLevel(slog.LevelDebug),
        alog.WithSource(false),
        alog.WithAttrs(slog.Attr{Key: "app", Value: slog.StringValue("myapp")}),
    )
    logger.Debug("This is a debug message")
}

Contextual Logging

You can add contextual information to your logs:

package main

import (
    "context"
    "github.com/arthurdotwork/alog"
    "log/slog"
)

func main() {
    logger := alog.Logger()
    
    // Add values to context
    ctx := alog.Append(context.Background(), slog.String("request_id", "12345"))
    ctx = alog.Append(ctx, slog.Int("count", 42))
    
    // Log with context
    logger.InfoContext(ctx, "Processing request")
}

Testing

To run the tests, use:

go test ./...

Changelog

All notable changes to this project will be documented in the CHANGELOG.md file.

License

This project is licensed under the MIT License.