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Flag Binding Refactor

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This patch alters the way flags are handled to coincide with the
documentation on the Viper README. The documentation indicated that flag
bindings were late, when in fact they were very, very early. This patch
changes flag bindings to behave as late bindings.
This commit is contained in:
akutz 2015-11-09 16:58:46 -06:00
parent a7ef020a9a
commit 690c1c1ef0
1 changed files with 32 additions and 29 deletions
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61
viper.go
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@ -405,15 +405,33 @@ func (v *Viper) Get(key string) interface{} {
if val == nil { if val == nil {
source := v.find(path[0]) source := v.find(path[0])
if source == nil { if source != nil {
return nil if reflect.TypeOf(source).Kind() == reflect.Map {
val = v.searchMap(cast.ToStringMap(source), path[1:])
}
} }
}
if reflect.TypeOf(source).Kind() == reflect.Map { // if no other value is returned and a flag does exist for the value,
val = v.searchMap(cast.ToStringMap(source), path[1:]) // get the flag's value even if the flag's value has not changed
if val == nil {
if flag, exists := v.pflags[lcaseKey]; exists {
jww.TRACE.Println(key, "get pflag default", val)
switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
val = cast.ToInt(flag.Value.String())
case "bool":
val = cast.ToBool(flag.Value.String())
default:
val = flag.Value.String()
}
} }
} }
if val == nil {
return nil
}
var valType interface{} var valType interface{}
if !v.typeByDefValue { if !v.typeByDefValue {
valType = val valType = val
@ -539,22 +557,11 @@ func (v *Viper) Unmarshal(rawVal interface{}) error {
func BindPFlags(flags *pflag.FlagSet) (err error) { return v.BindPFlags(flags) } func BindPFlags(flags *pflag.FlagSet) (err error) { return v.BindPFlags(flags) }
func (v *Viper) BindPFlags(flags *pflag.FlagSet) (err error) { func (v *Viper) BindPFlags(flags *pflag.FlagSet) (err error) {
flags.VisitAll(func(flag *pflag.Flag) { flags.VisitAll(func(flag *pflag.Flag) {
if err != nil { if err = v.BindPFlag(flag.Name, flag); err != nil {
// an error has been encountered in one of the previous flags
return return
} }
err = v.BindPFlag(flag.Name, flag)
switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
v.SetDefault(flag.Name, cast.ToInt(flag.Value.String()))
case "bool":
v.SetDefault(flag.Name, cast.ToBool(flag.Value.String()))
default:
v.SetDefault(flag.Name, flag.Value.String())
}
}) })
return return nil
} }
// Bind a specific key to a flag (as used by cobra) // Bind a specific key to a flag (as used by cobra)
@ -569,15 +576,6 @@ func (v *Viper) BindPFlag(key string, flag *pflag.Flag) (err error) {
return fmt.Errorf("flag for %q is nil", key) return fmt.Errorf("flag for %q is nil", key)
} }
v.pflags[strings.ToLower(key)] = flag v.pflags[strings.ToLower(key)] = flag
switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
v.SetDefault(key, cast.ToInt(flag.Value.String()))
case "bool":
v.SetDefault(key, cast.ToBool(flag.Value.String()))
default:
v.SetDefault(key, flag.Value.String())
}
return nil return nil
} }
@ -618,9 +616,14 @@ func (v *Viper) find(key string) interface{} {
// PFlag Override first // PFlag Override first
flag, exists := v.pflags[key] flag, exists := v.pflags[key]
if exists { if exists && flag.Changed {
if flag.Changed { jww.TRACE.Println(key, "found in override (via pflag):", flag.Value)
jww.TRACE.Println(key, "found in override (via pflag):", val) switch flag.Value.Type() {
case "int", "int8", "int16", "int32", "int64":
return cast.ToInt(flag.Value.String())
case "bool":
return cast.ToBool(flag.Value.String())
default:
return flag.Value.String() return flag.Value.String()
} }
} }