func (config FlagsConfig) ApplyTo(cmd string, c *cli.Context) error {
entry := config[""]
if cmd != "" {
entry.Apply(config[cmd])
}
vars := entry.Vars()
if cmd == "" {
vars["local"] = vars["global"]
vars["global"] = nil
}
for key, val := range vars["global"] {
if !c.GlobalIsSet(key) {
switch val.(type) {
case string:
strVal := val.(string)
if strVal == "" {
continue
}
c.GlobalSet(key, strVal)
case []string:
strSlice := val.([]string)
if len(strSlice) == 0 {
continue
}
for _, valBit := range strSlice {
c.GlobalSet(key, valBit)
}
default:
return fmt.Errorf(`unknown value type %T (%s: %+v)`, val, key, val)
}
}
}
for key, val := range vars["local"] {
if !c.IsSet(key) {
switch val.(type) {
case string:
strVal := val.(string)
if strVal == "" {
continue
}
c.Set(key, strVal)
case []string:
strSlice := val.([]string)
if len(strSlice) == 0 {
continue
}
for _, valBit := range strSlice {
c.Set(key, valBit)
}
default:
return fmt.Errorf(`unknown value type %T (%s: %+v)`, val, key, val)
}
}
}
return nil
}