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options.go
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options.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package test
import (
"strconv"
"strings"
)
// Flag is a flag that can be represented as a slice of strings.
type Flag interface {
// Slice returns a representation of this Flag as a slice of strings.
Slice() []string
}
func keyToFlag(key string) string {
return "--" + key
}
type intFlag struct {
key string
value int
}
func (f *intFlag) Slice() []string {
return []string{keyToFlag(f.key), strconv.Itoa(f.value)}
}
type stringFlag struct {
key string
value string
}
func (f *stringFlag) Slice() []string {
return []string{keyToFlag(f.key), f.value}
}
type boolFlag struct {
key string
value bool
}
func (f *boolFlag) Slice() []string {
var value string
if f.value {
value = "true"
} else {
value = "false"
}
return []string{keyToFlag(f.key), value}
}
type stringSliceFlag struct {
key string
value []string
}
func (f *stringSliceFlag) Slice() []string {
return []string{keyToFlag(f.key), strings.Join(f.value, ",")}
}
// IntFlag returns a Flag with the given key and integer value.
func IntFlag(key string, value int) Flag {
return &intFlag{key, value}
}
// StringFlag returns a Flag with the given key and string value.
func StringFlag(key, value string) Flag {
return &stringFlag{key, value}
}
// BoolFlag returns a Flag with the given key and boolean value.
func BoolFlag(key string, value bool) Flag {
return &boolFlag{key, value}
}
// StringSliceFlag returns a flag with the given key and string slice value.
func StringSliceFlag(key string, value ...string) Flag {
return &stringSliceFlag{key, value}
}
// Command is a command that has a name, a list of flags, and a list of arguments.
type Command struct {
Name string
Flags []Flag
Args []string
}
// CommandBuilder is a builder for Command objects.
type CommandBuilder struct {
command Command
}
// NewCommandBuilder creates and returns a new CommandBuilder with the given name.
func NewCommandBuilder(name string) *CommandBuilder {
return &CommandBuilder{Command{Name: name}}
}
// Flags appends the given flags to this CommandBuilder.
func (c *CommandBuilder) Flags(flags ...Flag) *CommandBuilder {
c.command.Flags = append(c.command.Flags, flags...)
return c
}
// Args appends the given arguments to this CommandBuilder.
func (c *CommandBuilder) Args(args ...string) *CommandBuilder {
c.command.Args = append(c.command.Args, args...)
return c
}
// Command returns the Command that has been built by this CommandBuilder.
func (c *CommandBuilder) Command() *Command {
return &c.command
}
// Slice returns a representation of this Command as a slice of strings.
func (c *Command) Slice() []string {
out := []string{c.Name}
for _, flag := range c.Flags {
out = append(out, flag.Slice()...)
}
out = append(out, c.Args...)
return out
}
// String returns a representation of this Command as a string.
func (c *Command) String() string {
return strings.Join(c.Slice(), " ")
}