lumber

Easy to use & pretty logger for golang

• Install
• Logging Functions
  • lumber.Done()
  • lumber.Info()
  • lumber.Debug()
  • lumber.Warning()
  • lumber.Error()
  • lumber.ErrorMsg()
  • lumber.Fatal()
  • lumber.FatalMsg()
• Customization
• Examples

Install

Simply run the following from your project root:

go get -u github.com/gleich/lumber/v3

Logging Functions

lumber.Done()

Output a "DONE" log.

Demo:

package main

import (
    "time"

    "github.com/gleich/lumber/v3"
)

func main() {
    lumber.Done("booted up the program!")
    time.Sleep(2 * time.Second)
    lumber.Done("waited 2 seconds!")
}

Outputs:

lumber.Info()

Output an info log.

Demo:

package main

import (
    "time"

    "github.com/gleich/lumber/v3"
)

func main() {
    lumber.Info("Getting the current year")
    now := time.Now()
    lumber.Info("Current year is", now.Year())
}

Outputs:

lumber.Debug()

Output a debug log.

Demo:

package main

import (
    "os"

    "github.com/gleich/lumber/v3"
)

func main() {
    homeDir, _ := os.UserHomeDir()
    lumber.Debug("User's home dir is", homeDir)
}

Outputs:

lumber.Warning()

Output a warning log.

Demo:

package main

import (
    "time"

    "github.com/gleich/lumber/v3"
)

func main() {
    now := time.Now()
    if now.Year() != 2004 {
        lumber.Warning("Current year isn't 2004")
    }
}

Outputs:

lumber.Error()

Output an error log with a stack trace.

Demo:

package main

import (
    "os"

    "github.com/gleich/lumber/v3"
)

func main() {
    fname := "invisible-file.txt"
    _, err := os.ReadFile(fName)
    if err != nil {
        lumber.Error(err, "Failed to read from", fname)
    }
}

Outputs:

lumber.ErrorMsg()

Output an error message.

Demo:

package main

import "github.com/gleich/lumber/v3"

func main() {
    lumber.ErrorMsg("Ahhh stuff broke")
}

Outputs:

lumber.Fatal()

Output a fatal log with a stack trace.

Demo:

package main

import (
    "os"

    "github.com/gleich/lumber/v3"
)

func main() {
    fName := "invisible-file.txt"
    _, err := os.ReadFile(fName)
    if err != nil {
        lumber.Fatal(err, "Failed to read from", fName)
    }
}

Outputs:

lumber.FatalMsg()

Output a fatal message.

Demo:

package main

import "github.com/gleich/lumber/v3"

func main() {
    lumber.FatalMsg("Ahhh stuff broke")
}

Outputs:

Customization

You can customize the logger that lumber uses. Below is an example of some of this customization:

package main

import (
    "time"

    "github.com/gleich/lumber/v3"
)

func main() {
    lumber.SetTimezone(time.Local)
	lumber.SetTimeFormat("Mon Jan 2 15:04:05 MST 2006")
	lumber.SetFatalExitCode(0)

    lumber.Done("Calling from custom logger")
}

Examples

See some examples in the _examples/ folder.