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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"errors"
"flag"
"fmt"
"os/exec"
"strings"
"golang.org/x/mod/module"
)
type usageError struct {
err error
}
func usageErrorf(format string, args ...interface{}) error {
return &usageError{err: fmt.Errorf(format, args...)}
}
const usageText = `usage: gorelease [-base=version] [-version=version]`
func (e *usageError) Error() string {
msg := ""
if !errors.Is(e.err, flag.ErrHelp) {
msg = e.err.Error()
}
return usageText + "\n" + msg + "\nFor more information, run go doc golang.org/x/exp/cmd/gorelease"
}
type baseVersionError struct {
err error
modPath string
}
func (e *baseVersionError) Error() string {
firstVersion := "v0.1.0"
_, major, _ := module.SplitPathVersion(e.modPath)
if major != "" {
firstVersion = major[1:] + ".0.0"
}
return fmt.Sprintf("could not find base version. Consider setting -version=%s if this is a first release, or explicitly set -base=none: %v", firstVersion, e.err)
}
func (e *baseVersionError) Unwrap() error {
return e.err
}
type downloadError struct {
m module.Version
err error
}
func (e *downloadError) Error() string {
msg := e.err.Error()
sep := " "
if strings.Contains(msg, "\n") {
sep = "\n"
}
return fmt.Sprintf("error downloading module %s@%s:%s%s", e.m.Path, e.m.Version, sep, msg)
}
// cleanCmdError simplifies error messages from os/exec.Cmd.Run.
// For ExitErrors, it trims and returns stderr. This is useful for go commands
// that print well-formatted errors. By default, ExitError prints the exit
// status but not stderr.
//
// cleanCmdError returns other errors unmodified.
func cleanCmdError(err error) error {
if xerr, ok := err.(*exec.ExitError); ok {
if stderr := strings.TrimSpace(string(xerr.Stderr)); stderr != "" {
return errors.New(stderr)
}
}
return err
}
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