55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package cmd
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import "reflect"
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// ConfigField represents a single leaf field in the Config struct,
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// mapped to its dotted TOML key path.
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type ConfigField struct {
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Key string // dotted key, e.g. "git.auto_commit"
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Value any // current value
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Default any // value from defaultConfig()
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IsDefault bool // Value == Default
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Field reflect.Value // settable reflect.Value (from cfg pointer)
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Kind reflect.Kind // field type kind
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}
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// configFields walks cfg and defaults in parallel, returning a ConfigField
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// for every leaf field. Keys are built from TOML struct tags.
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func configFields(cfg, defaults *Config) []ConfigField {
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var fields []ConfigField
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walk(reflect.ValueOf(cfg).Elem(), reflect.ValueOf(defaults).Elem(), "", &fields)
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return fields
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}
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func walk(cv, dv reflect.Value, prefix string, out *[]ConfigField) {
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ct := cv.Type()
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for i := 0; i < ct.NumField(); i++ {
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sf := ct.Field(i)
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tag := sf.Tag.Get("toml")
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if tag == "" || tag == "-" {
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continue
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}
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key := tag
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if prefix != "" {
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key = prefix + "." + tag
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}
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cfv := cv.Field(i)
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dfv := dv.Field(i)
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if sf.Type.Kind() == reflect.Struct {
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walk(cfv, dfv, key, out)
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continue
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}
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*out = append(*out, ConfigField{
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Key: key,
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Value: cfv.Interface(),
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Default: dfv.Interface(),
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IsDefault: reflect.DeepEqual(cfv.Interface(), dfv.Interface()),
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Field: cfv,
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Kind: sf.Type.Kind(),
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})
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}
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}
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