Move the Go stuff to ./forged/v0.1.32

1 files changed, 0 insertions, 375 deletions

diff --git a/internal/scfg/unmarshal.go b/internal/scfg/unmarshal.go
deleted file mode 100644
index e9e1a52..0000000
--- a/internal/scfg/unmarshal.go
+++ /dev/null
@@ -1,375 +0,0 @@
-// SPDX-License-Identifier: MIT
-// SPDX-FileCopyrightText: Copyright (c) 2020 Simon Ser <https://emersion.fr>
-// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
-
-package scfg
-
-import (
-	"encoding"
-	"fmt"
-	"io"
-	"reflect"
-	"strconv"
-)
-
-// Decoder reads and decodes an scfg document from an input stream.
-type Decoder struct {
-	r                 io.Reader
-	unknownDirectives []*Directive
-}
-
-// NewDecoder returns a new decoder which reads from r.
-func NewDecoder(r io.Reader) *Decoder {
-	return &Decoder{r: r}
-}
-
-// UnknownDirectives returns a slice of all unknown directives encountered
-// during Decode.
-func (dec *Decoder) UnknownDirectives() []*Directive {
-	return dec.unknownDirectives
-}
-
-// Decode reads scfg document from the input and stores it in the value pointed
-// to by v.
-//
-// If v is nil or not a pointer, Decode returns an error.
-//
-// Blocks can be unmarshaled to:
-//
-//   - Maps. Each directive is unmarshaled into a map entry. The map key must
-//     be a string.
-//   - Structs. Each directive is unmarshaled into a struct field.
-//
-// Duplicate directives are not allowed, unless the struct field or map value
-// is a slice of values representing a directive: structs or maps.
-//
-// Directives can be unmarshaled to:
-//
-//   - Maps. The children block is unmarshaled into the map. Parameters are not
-//     allowed.
-//   - Structs. The children block is unmarshaled into the struct. Parameters
-//     are allowed if one of the struct fields contains the "param" option in
-//     its tag.
-//   - Slices. Parameters are unmarshaled into the slice. Children blocks are
-//     not allowed.
-//   - Arrays. Parameters are unmarshaled into the array. The number of
-//     parameters must match exactly the length of the array. Children blocks
-//     are not allowed.
-//   - Strings, booleans, integers, floating-point values, values implementing
-//     encoding.TextUnmarshaler. Only a single parameter is allowed and is
-//     unmarshaled into the value. Children blocks are not allowed.
-//
-// The decoding of each struct field can be customized by the format string
-// stored under the "scfg" key in the struct field's tag. The tag contains the
-// name of the field possibly followed by a comma-separated list of options.
-// The name may be empty in order to specify options without overriding the
-// default field name. As a special case, if the field name is "-", the field
-// is ignored. The "param" option specifies that directive parameters are
-// stored in this field (the name must be empty).
-func (dec *Decoder) Decode(v interface{}) error {
-	block, err := Read(dec.r)
-	if err != nil {
-		return err
-	}
-
-	rv := reflect.ValueOf(v)
-	if rv.Kind() != reflect.Ptr || rv.IsNil() {
-		return fmt.Errorf("scfg: invalid value for unmarshaling")
-	}
-
-	return dec.unmarshalBlock(block, rv)
-}
-
-func (dec *Decoder) unmarshalBlock(block Block, v reflect.Value) error {
-	v = unwrapPointers(v)
-	t := v.Type()
-
-	dirsByName := make(map[string][]*Directive, len(block))
-	for _, dir := range block {
-		dirsByName[dir.Name] = append(dirsByName[dir.Name], dir)
-	}
-
-	switch v.Kind() {
-	case reflect.Map:
-		if t.Key().Kind() != reflect.String {
-			return fmt.Errorf("scfg: map key type must be string")
-		}
-		if v.IsNil() {
-			v.Set(reflect.MakeMap(t))
-		} else if v.Len() > 0 {
-			clearMap(v)
-		}
-
-		for name, dirs := range dirsByName {
-			mv := reflect.New(t.Elem()).Elem()
-			if err := dec.unmarshalDirectiveList(dirs, mv); err != nil {
-				return err
-			}
-			v.SetMapIndex(reflect.ValueOf(name), mv)
-		}
-
-	case reflect.Struct:
-		si, err := getStructInfo(t)
-		if err != nil {
-			return err
-		}
-
-		seen := make(map[int]bool)
-
-		for name, dirs := range dirsByName {
-			fieldIndex, ok := si.children[name]
-			if !ok {
-				dec.unknownDirectives = append(dec.unknownDirectives, dirs...)
-				continue
-			}
-			fv := v.Field(fieldIndex)
-			if err := dec.unmarshalDirectiveList(dirs, fv); err != nil {
-				return err
-			}
-			seen[fieldIndex] = true
-		}
-
-		for name, fieldIndex := range si.children {
-			if fieldIndex == si.param {
-				continue
-			}
-			if _, ok := seen[fieldIndex]; !ok {
-				return fmt.Errorf("scfg: missing required directive %q", name)
-			}
-		}
-
-	default:
-		return fmt.Errorf("scfg: unsupported type for unmarshaling blocks: %v", t)
-	}
-
-	return nil
-}
-
-func (dec *Decoder) unmarshalDirectiveList(dirs []*Directive, v reflect.Value) error {
-	v = unwrapPointers(v)
-	t := v.Type()
-
-	if v.Kind() != reflect.Slice || !isDirectiveType(t.Elem()) {
-		if len(dirs) > 1 {
-			return newUnmarshalDirectiveError(dirs[1], "directive must not be specified more than once")
-		}
-		return dec.unmarshalDirective(dirs[0], v)
-	}
-
-	sv := reflect.MakeSlice(t, len(dirs), len(dirs))
-	for i, dir := range dirs {
-		if err := dec.unmarshalDirective(dir, sv.Index(i)); err != nil {
-			return err
-		}
-	}
-	v.Set(sv)
-	return nil
-}
-
-// isDirectiveType checks whether a type can only be unmarshaled as a
-// directive, not as a parameter. Accepting too many types here would result in
-// ambiguities, see:
-// https://lists.sr.ht/~emersion/public-inbox/%3C20230629132458.152205-1-contact%40emersion.fr%3E#%3Ch4Y2peS_YBqY3ar4XlmPDPiNBFpYGns3EBYUx3_6zWEhV2o8_-fBQveRujGADWYhVVCucHBEryFGoPtpC3d3mQ-x10pWnFogfprbQTSvtxc=@emersion.fr%3E
-func isDirectiveType(t reflect.Type) bool {
-	for t.Kind() == reflect.Ptr {
-		t = t.Elem()
-	}
-
-	textUnmarshalerType := reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
-	if reflect.PtrTo(t).Implements(textUnmarshalerType) {
-		return false
-	}
-
-	switch t.Kind() {
-	case reflect.Struct, reflect.Map:
-		return true
-	default:
-		return false
-	}
-}
-
-func (dec *Decoder) unmarshalDirective(dir *Directive, v reflect.Value) error {
-	v = unwrapPointers(v)
-	t := v.Type()
-
-	if v.CanAddr() {
-		if _, ok := v.Addr().Interface().(encoding.TextUnmarshaler); ok {
-			if len(dir.Children) != 0 {
-				return newUnmarshalDirectiveError(dir, "directive requires zero children")
-			}
-			return unmarshalParamList(dir, v)
-		}
-	}
-
-	switch v.Kind() {
-	case reflect.Map:
-		if len(dir.Params) > 0 {
-			return newUnmarshalDirectiveError(dir, "directive requires zero parameters")
-		}
-		if err := dec.unmarshalBlock(dir.Children, v); err != nil {
-			return err
-		}
-	case reflect.Struct:
-		si, err := getStructInfo(t)
-		if err != nil {
-			return err
-		}
-
-		if si.param >= 0 {
-			if err := unmarshalParamList(dir, v.Field(si.param)); err != nil {
-				return err
-			}
-		} else {
-			if len(dir.Params) > 0 {
-				return newUnmarshalDirectiveError(dir, "directive requires zero parameters")
-			}
-		}
-
-		if err := dec.unmarshalBlock(dir.Children, v); err != nil {
-			return err
-		}
-	default:
-		if len(dir.Children) != 0 {
-			return newUnmarshalDirectiveError(dir, "directive requires zero children")
-		}
-		if err := unmarshalParamList(dir, v); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func unmarshalParamList(dir *Directive, v reflect.Value) error {
-	switch v.Kind() {
-	case reflect.Slice:
-		t := v.Type()
-		sv := reflect.MakeSlice(t, len(dir.Params), len(dir.Params))
-		for i, param := range dir.Params {
-			if err := unmarshalParam(param, sv.Index(i)); err != nil {
-				return newUnmarshalParamError(dir, i, err)
-			}
-		}
-		v.Set(sv)
-	case reflect.Array:
-		if len(dir.Params) != v.Len() {
-			return newUnmarshalDirectiveError(dir, fmt.Sprintf("directive requires exactly %v parameters", v.Len()))
-		}
-		for i, param := range dir.Params {
-			if err := unmarshalParam(param, v.Index(i)); err != nil {
-				return newUnmarshalParamError(dir, i, err)
-			}
-		}
-	default:
-		if len(dir.Params) != 1 {
-			return newUnmarshalDirectiveError(dir, "directive requires exactly one parameter")
-		}
-		if err := unmarshalParam(dir.Params[0], v); err != nil {
-			return newUnmarshalParamError(dir, 0, err)
-		}
-	}
-
-	return nil
-}
-
-func unmarshalParam(param string, v reflect.Value) error {
-	v = unwrapPointers(v)
-	t := v.Type()
-
-	// TODO: improve our logic following:
-	// https://cs.opensource.google/go/go/+/refs/tags/go1.21.5:src/encoding/json/decode.go;drc=b9b8cecbfc72168ca03ad586cc2ed52b0e8db409;l=421
-	if v.CanAddr() {
-		if v, ok := v.Addr().Interface().(encoding.TextUnmarshaler); ok {
-			return v.UnmarshalText([]byte(param))
-		}
-	}
-
-	switch v.Kind() {
-	case reflect.String:
-		v.Set(reflect.ValueOf(param))
-	case reflect.Bool:
-		switch param {
-		case "true":
-			v.Set(reflect.ValueOf(true))
-		case "false":
-			v.Set(reflect.ValueOf(false))
-		default:
-			return fmt.Errorf("invalid bool parameter %q", param)
-		}
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		i, err := strconv.ParseInt(param, 10, t.Bits())
-		if err != nil {
-			return fmt.Errorf("invalid %v parameter: %v", t, err)
-		}
-		v.Set(reflect.ValueOf(i).Convert(t))
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-		u, err := strconv.ParseUint(param, 10, t.Bits())
-		if err != nil {
-			return fmt.Errorf("invalid %v parameter: %v", t, err)
-		}
-		v.Set(reflect.ValueOf(u).Convert(t))
-	case reflect.Float32, reflect.Float64:
-		f, err := strconv.ParseFloat(param, t.Bits())
-		if err != nil {
-			return fmt.Errorf("invalid %v parameter: %v", t, err)
-		}
-		v.Set(reflect.ValueOf(f).Convert(t))
-	default:
-		return fmt.Errorf("unsupported type for unmarshaling parameter: %v", t)
-	}
-
-	return nil
-}
-
-func unwrapPointers(v reflect.Value) reflect.Value {
-	for v.Kind() == reflect.Ptr {
-		if v.IsNil() {
-			v.Set(reflect.New(v.Type().Elem()))
-		}
-		v = v.Elem()
-	}
-	return v
-}
-
-func clearMap(v reflect.Value) {
-	for _, k := range v.MapKeys() {
-		v.SetMapIndex(k, reflect.Value{})
-	}
-}
-
-type unmarshalDirectiveError struct {
-	lineno int
-	name   string
-	msg    string
-}
-
-func newUnmarshalDirectiveError(dir *Directive, msg string) *unmarshalDirectiveError {
-	return &unmarshalDirectiveError{
-		name:   dir.Name,
-		lineno: dir.lineno,
-		msg:    msg,
-	}
-}
-
-func (err *unmarshalDirectiveError) Error() string {
-	return fmt.Sprintf("line %v, directive %q: %v", err.lineno, err.name, err.msg)
-}
-
-type unmarshalParamError struct {
-	lineno     int
-	directive  string
-	paramIndex int
-	err        error
-}
-
-func newUnmarshalParamError(dir *Directive, paramIndex int, err error) *unmarshalParamError {
-	return &unmarshalParamError{
-		directive:  dir.Name,
-		lineno:     dir.lineno,
-		paramIndex: paramIndex,
-		err:        err,
-	}
-}
-
-func (err *unmarshalParamError) Error() string {
-	return fmt.Sprintf("line %v, directive %q, parameter %v: %v", err.lineno, err.directive, err.paramIndex+1, err.err)
-}