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cmd_flags.go
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/
cmd_flags.go
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package flag
import (
"fmt"
"gopkg.in/urfave/cli.v1"
"strconv"
"strings"
)
type flagInfo struct {
IsSet bool
Value string
}
type CmdFlags map[string]flagInfo
func NewCmdFlags(ctx *cli.Context, totalFlags []cli.Flag) CmdFlags {
flags := make(CmdFlags, len(totalFlags))
for _, f := range totalFlags {
if ctx.GlobalIsSet(f.GetName()) {
flags[f.GetName()] = flagInfo{true, ctx.GlobalString(f.GetName())}
} else if ctx.IsSet(f.GetName()) {
flags[f.GetName()] = flagInfo{true, ctx.String(f.GetName())}
} else {
// Get default flag value
flags[f.GetName()] = flagInfo{false, ctx.String(f.GetName())}
}
}
return flags
}
func (c CmdFlags) Set(name, value string) {
c[name] = flagInfo{
IsSet: true,
Value: value,
}
}
func (c CmdFlags) IsSet(name string) bool {
info, ok := c[name]
return ok && info.IsSet
}
// Bool returns false if not found
func (c CmdFlags) Bool(name string) bool {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseBool(info.Value); err == nil {
return parsed
}
}
return false
}
// Float64 returns 0 if not found
func (c CmdFlags) Float64(name string) float64 {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseFloat(info.Value, 64); err == nil {
return parsed
}
}
return 0
}
// Int64 returns 0 if not found
func (c CmdFlags) Int64(name string) int64 {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseInt(info.Value, 0, 64); err == nil {
return parsed
}
}
return 0
}
// Int returns 0 if not found
func (c CmdFlags) Int(name string) int {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseInt(info.Value, 0, 64); err == nil {
return int(parsed)
}
}
return 0
}
// Uint64 returns 0 if not found
func (c CmdFlags) Uint64(name string) uint64 {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseUint(info.Value, 0, 64); err == nil {
return parsed
}
}
return 0
}
// Uint returns 0 if not found
func (c CmdFlags) Uint(name string) uint {
info, ok := c[name]
if ok {
if parsed, err := strconv.ParseUint(info.Value, 0, 64); err == nil {
return uint(parsed)
}
}
return 0
}
// String returns "" if not found
func (c CmdFlags) String(name string) string {
info, ok := c[name]
if ok {
return info.Value
}
return ""
}
// checkExclusive verifies that only a single instance of the provided flags was set by the user.
func (c CmdFlags) CheckExclusive(args ...cli.Flag) {
if len(args) <= 1 {
return
}
set := make([]string, 0, 1)
for i := 0; i < len(args); i++ {
name := args[i].GetName()
if c.IsSet(name) {
set = append(set, "--"+name)
}
}
if len(set) > 1 {
panic(fmt.Sprintf("flags %v can't be used at the same time", strings.Join(set, ", ")))
}
}