package config import ( "fmt" "strings" ) // Option defines a key/value entity in a config file. type Option struct { // Key preserving original caseness. // Use IsKey instead to compare key regardless of caseness. Key string // Original value as string, could be not normalized. Value string } type Options []*Option // IsKey returns true if the given key matches // this option's key in a case-insensitive comparison. func (o *Option) IsKey(key string) bool { return strings.ToLower(o.Key) == strings.ToLower(key) } func (opts Options) GoString() string { var strs []string for _, opt := range opts { strs = append(strs, fmt.Sprintf("%#v", opt)) } return strings.Join(strs, ", ") } // Get gets the value for the given key if set, // otherwise it returns the empty string. // // Note that there is no difference // // This matches git behaviour since git v1.8.1-rc1, // if there are multiple definitions of a key, the // last one wins. // // See: http://article.gmane.org/gmane.linux.kernel/1407184 // // In order to get all possible values for the same key, // use GetAll. func (opts Options) Get(key string) string { for i := len(opts) - 1; i >= 0; i-- { o := opts[i] if o.IsKey(key) { return o.Value } } return "" } // GetAll returns all possible values for the same key. func (opts Options) GetAll(key string) []string { result := []string{} for _, o := range opts { if o.IsKey(key) { result = append(result, o.Value) } } return result } func (opts Options) withoutOption(key string) Options { result := Options{} for _, o := range opts { if !o.IsKey(key) { result = append(result, o) } } return result } func (opts Options) withAddedOption(key string, value string) Options { return append(opts, &Option{key, value}) } func (opts Options) withSettedOption(key string, values ...string) Options { var result Options var added []string for _, o := range opts { if !o.IsKey(key) { result = append(result, o) continue } if contains(values, o.Value) { added = append(added, o.Value) result = append(result, o) continue } } for _, value := range values { if contains(added, value) { continue } result = result.withAddedOption(key, value) } return result } func contains(haystack []string, needle string) bool { for _, s := range haystack { if s == needle { return true } } return false }