xesite/vendor/github.com/magefile/mage/mg/errors.go

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2017-12-13 18:43:58 +00:00
package mg
import (
"errors"
"fmt"
)
type fatalErr struct {
code int
error
}
func (f fatalErr) ExitStatus() int {
return f.code
}
type exitStatus interface {
ExitStatus() int
}
// Fatal returns an error that will cause mage to print out the
// given args and exit with the given exit code.
func Fatal(code int, args ...interface{}) error {
return fatalErr{
code: code,
error: errors.New(fmt.Sprint(args...)),
}
}
// Fatalf returns an error that will cause mage to print out the
// given message and exit with an exit code of 1.
func Fatalf(code int, format string, args ...interface{}) error {
return fatalErr{
code: code,
error: fmt.Errorf(format, args...),
}
}
// ExitStatus queries the error for an exit status. If the error is nil, it
// returns 0. If the error does not implement ExitStatus() int, it returns 1.
// Otherwise it retiurns the value from ExitStatus().
func ExitStatus(err error) int {
if err == nil {
return 0
}
exit, ok := err.(exitStatus)
if !ok {
return 1
}
return exit.ExitStatus()
}