werr

Error Wrapper creates an wrapper for the error type in Go which captures the File, Line and Stack of where it was called.

Programming language: Go

Tags: Miscellaneous    

README

Error Wrapper

Error Wrapper creates an wrapper for the error type in Go which captures the File, Line and Stack of where it was called.

Installation

go get -u github.com/txgruppi/werr

Why?

I don't like to use panic.

I want my apps to run forever and just output errors to a log.

Usually I write my logs using logger.Printf("%#v", err) but I needed more info related to the error, so I created this package.

Example

package main

import (
    "fmt"
    "os"

    "github.com/txgruppi/werr"
)

func main() {
    file, err := os.Open("/tmp/my-missing-file")
    if err != nil {
        err = werr.Wrap(err)                        // Wrap it
        fmt.Println(err.Error())                    // Return the original error message
        if wrapped, ok := err.(*werr.Wrapper); ok { // Try to convert to `*werr.Wrapper`
            lg, _ := wrapped.Log() // Generate the log message
            fmt.Println(lg)        // Print the log message
        }
    }
    defer file.Close()
}

This code will output something line this:

open /tmp/my-missing-file: no such file or directory
/Users/txgruppi/code/temp/test.go:13 open /tmp/my-missing-file: no such file or directory
goroutine 1 [running]:
github.com/txgruppi/werr.Wrap(0x2208246900, 0x208270300, 0x0, 0x0)
        /Users/txgruppi/code/go/src/github.com/txgruppi/werr/funcs.go:24 +0x153
main.main()
        /Users/txgruppi/code/temp/test.go:13 +0x72

Tests

go get -u -t github.com/txgruppi/werr
cd $GOPATH/src/github.com/txgruppi/werr
go test ./...

License

MIT