errors库

Pkg/errors

package main

import (
	"fmt"

	"github.com/pkg/errors"
)

func Func() error {
	return fmt.Errorf("oring error")
}

func Func1() error {
	if err := Func(); err != nil {
		return errors.WithMessage(err, "Func1")
	}
	return nil
}

func Func2() error {
	err := Func1()
	if err != nil {
		return errors.Wrap(err, "Func2")
	}
	return nil
}

func main() {
	if err := Func2(); err != nil {
		fmt.Print(err)
		fmt.Println("\n------\n")
		fmt.Printf("%+v", err)
		return
	}
}

• New(message string) 生成的错误，自带调用堆栈信息 // errors.New/fmt.Errorf
• WithMessage(err error, message string) 只附加新的信息
• func WithStack(err error) error //只附加调用堆栈信息
• func Wrap(err error, message string) error //同时附加堆栈和信息

func Cause(err error) error 获取原始错误

Print

fmt.Printf

• %s,%v 功能一样，输出错误信息，不包含堆栈
• %q 输出的错误信息带引号，不包含堆栈
• %+v 输出错误信息和堆栈

juju/errors

package main

import (
	"fmt"

	"github.com/juju/errors"
)

func Func() error {
	return fmt.Errorf("oring error")
}

func Func1() error {
	if err := Func(); err != nil {
		return errors.Annotate(err, "Func1")
	}
	return nil
}

func Func2() error {
	err := Func1()
	if err != nil {
		return errors.Trace(err)
	}
	return nil
}

func main() {
	if err := Func2(); err != nil {
		fmt.Print(err)
		fmt.Println("\n------\n")
		fmt.Printf("%+v", err)
		return
	}
}

GOPROXY

$go env -w GOPROXY=https://goproxy.cn,direct
$export GOPROXY=https://goproxy.cn

mod replace

replace (
    golang.org/x/build => github.com/golang/build v0.0.0-20190416225751-b5f252a0a7dd
    golang.org/x/crypto => github.com/golang/crypto v0.0.0-20190411191339-88737f569e3a
    golang.org/x/exp => github.com/golang/exp v0.0.0-20190413192849-7f338f571082
    golang.org/x/image => github.com/golang/image v0.0.0-20190417020941-4e30a6eb7d9a
    golang.org/x/lint => github.com/golang/lint v0.0.0-20190409202823-959b441ac422
    golang.org/x/mobile => github.com/golang/mobile v0.0.0-20190415191353-3e0bab5405d6
    golang.org/x/net => github.com/golang/net v0.0.0-20190415214537-1da14a5a36f2
    golang.org/x/oauth2 => github.com/golang/oauth2 v0.0.0-20190402181905-9f3314589c9a
    golang.org/x/perf => github.com/golang/perf v0.0.0-20190312170614-0655857e383f
    golang.org/x/sync => github.com/golang/sync v0.0.0-20190412183630-56d357773e84
    golang.org/x/sys => github.com/golang/sys v0.0.0-20190416152802-12500544f89f
    golang.org/x/text => github.com/golang/text v0.3.0
    golang.org/x/time => github.com/golang/time v0.0.0-20190308202827-9d24e82272b4
    golang.org/x/tools => github.com/golang/tools v0.0.0-20190417005754-4ca4b55e2050
    golang.org/x/xerrors => github.com/golang/xerrors v0.0.0-20190410155217-1f06c39b4373
    google.golang.org/api => github.com/googleapis/google-api-go-client v0.3.2
    google.golang.org/appengine => github.com/golang/appengine v1.5.0
    google.golang.org/genproto => github.com/google/go-genproto v0.0.0-20190415143225-d1146b9035b9
    google.golang.org/grpc => github.com/grpc/grpc-go v1.20.0
    gopkg.in/asn1-ber.v1 => github.com/go-asn1-ber/asn1-ber v0.0.0-20181015200546-f715ec2f112d
    gopkg.in/fsnotify.v1 => github.com/Jwsonic/recinotify v0.0.0-20151201212458-7389700f1b43
    gopkg.in/gorethink/gorethink.v4 => github.com/rethinkdb/rethinkdb-go v4.0.0+incompatible
    gopkg.in/ini.v1 => github.com/go-ini/ini v1.42.0
    gopkg.in/src-d/go-billy.v4 => github.com/src-d/go-billy v4.2.0+incompatible
    gopkg.in/src-d/go-git-fixtures.v3 => github.com/src-d/go-git-fixtures v3.4.0+incompatible
    gopkg.in/yaml.v2 => github.com/go-yaml/yaml v2.1.0+incompatible
    k8s.io/api => github.com/kubernetes/api v0.0.0-20190416052506-9eb4726e83e4
    k8s.io/apimachinery => github.com/kubernetes/apimachinery v0.0.0-20190416092415-3370b4aef5d6
    k8s.io/client-go => github.com/kubernetes/client-go v11.0.0+incompatible
    k8s.io/klog => github.com/simonpasquier/klog-gokit v0.1.0
    k8s.io/kube-openapi => github.com/kubernetes/kube-openapi v0.0.0-20190401085232-94e1e7b7574c
    k8s.io/utils => github.com/kubernetes/utils v0.0.0-20190308190857-21c4ce38f2a7
    sigs.k8s.io/yaml => github.com/kubernetes-sigs/yaml v1.1.0
)

粘贴到项目对应的go.mod文件中，执行

$ go mod tidy

参考

1. https://github.com/juju/errors
2. https://github.com/pkg/errors