98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
/*
|
|
* MIT License
|
|
*
|
|
* Copyright (c) 2022 urfave/cli maintainers
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
package errors
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
)
|
|
|
|
// OsExiter is the function used when the app exits. If not set defaults to os.Exit.
|
|
var OsExiter = os.Exit
|
|
|
|
// ErrWriter is used to write errors to the user. This can be anything
|
|
// implementing the io.Writer interface and defaults to os.Stderr.
|
|
var ErrWriter io.Writer = os.Stderr
|
|
|
|
type ErrorFormatter interface {
|
|
Format(s fmt.State, verb rune)
|
|
}
|
|
|
|
// ExitCoder is the interface checked by `App` and `Command` for a custom exit
|
|
// code
|
|
type ExitCoder interface {
|
|
error
|
|
ExitCode() int
|
|
}
|
|
|
|
// ExitError fulfills both the builtin `error` interface and `ExitCoder`
|
|
type ExitError struct {
|
|
exitCode int
|
|
message any
|
|
}
|
|
|
|
// NewExitError makes a new *ExitError
|
|
func NewExitError(message any, exitCode int) *ExitError {
|
|
return &ExitError{
|
|
exitCode: exitCode,
|
|
message: message,
|
|
}
|
|
}
|
|
|
|
// Error returns the string message, fulfilling the interface required by
|
|
// `error`
|
|
func (ee *ExitError) Error() string {
|
|
return fmt.Sprintf("%v", ee.message)
|
|
}
|
|
|
|
// ExitCode returns the exit code, fulfilling the interface required by
|
|
// `ExitCoder`
|
|
func (ee *ExitError) ExitCode() int {
|
|
return ee.exitCode
|
|
}
|
|
|
|
// HandleExitCoder checks if the error fulfills the ExitCoder interface, and if
|
|
// so prints the error to stderr (if it is non-empty) and calls OsExiter with the
|
|
// given exit code. If the given error is a MultiError, then this func is
|
|
// called on all members of the Errors slice and calls OsExiter with the last exit code.
|
|
func HandleExitCoder(err error) {
|
|
if err == nil {
|
|
return
|
|
}
|
|
|
|
if exitErr, ok := err.(ExitCoder); ok {
|
|
if err.Error() != "" {
|
|
fmt.Fprintln(ErrWriter, err)
|
|
}
|
|
OsExiter(exitErr.ExitCode())
|
|
return
|
|
}
|
|
// unknown error exit with code 3
|
|
fmt.Fprintln(ErrWriter, err)
|
|
|
|
OsExiter(3)
|
|
}
|