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types.go
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types.go
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// Copyright 2017-2021 The Usacloud Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package clitag
import (
"fmt"
"reflect"
"strings"
)
// Field reflect.StructField + Tag
type StructField struct {
reflect.StructField
Tag
}
// Tag structにつけられたftagの値
//
// 例: タグが`example,aliases=foo bar,short=e,desc=foobar`の場合
// - FlagName: example
// - Aliases: foo, bar
// - Shorthand: e
// - Description: foobar
// - Squash: false
// - Ignore: false
// - Category: (empty)
// - Order: 0
type Tag struct {
FlagName string
FieldName string
Aliases []string
Shorthand string
Description string
Squash bool
Ignore bool
Category string
Order int
Options []string // 設定可能な値のリスト
DisplayOptions []string // 表示用
}
// LongDescription DescriptionにAliasesとOptionsを連結して返す
func (t Tag) LongDescription() string {
var tokens []string
if t.Description != "" {
tokens = append(tokens, t.Description)
}
options := t.OptionsString()
if options != "" {
tokens = append(tokens, options)
}
aliases := t.AliasesString()
if aliases != "" {
tokens = append(tokens, aliases)
}
return strings.Join(tokens, " ")
}
func (t Tag) AliasesString() string {
if len(t.Aliases) == 0 {
return ""
}
var aliases []string
for _, a := range t.Aliases {
aliases = append(aliases, "--"+a)
}
return fmt.Sprintf("(aliases: %s)", strings.Join(aliases, ", "))
}
func (t Tag) OptionsString() string {
if len(t.Options) == 0 {
return ""
}
options := t.Options
if len(t.DisplayOptions) > 0 {
options = t.DisplayOptions
}
return fmt.Sprintf("options: [%s]", strings.Join(options, "/"))
}