From 8c12c6939aab9106db14ec2d11d983bc5b29fb2c Mon Sep 17 00:00:00 2001 From: Niall Sheridan Date: Sun, 7 Jul 2019 21:33:44 +0100 Subject: Switch to modules --- vendor/github.com/hashicorp/hcl/decoder.go | 729 ----------------------------- 1 file changed, 729 deletions(-) delete mode 100644 vendor/github.com/hashicorp/hcl/decoder.go (limited to 'vendor/github.com/hashicorp/hcl/decoder.go') diff --git a/vendor/github.com/hashicorp/hcl/decoder.go b/vendor/github.com/hashicorp/hcl/decoder.go deleted file mode 100644 index bed9ebb..0000000 --- a/vendor/github.com/hashicorp/hcl/decoder.go +++ /dev/null @@ -1,729 +0,0 @@ -package hcl - -import ( - "errors" - "fmt" - "reflect" - "sort" - "strconv" - "strings" - - "github.com/hashicorp/hcl/hcl/ast" - "github.com/hashicorp/hcl/hcl/parser" - "github.com/hashicorp/hcl/hcl/token" -) - -// This is the tag to use with structures to have settings for HCL -const tagName = "hcl" - -var ( - // nodeType holds a reference to the type of ast.Node - nodeType reflect.Type = findNodeType() -) - -// Unmarshal accepts a byte slice as input and writes the -// data to the value pointed to by v. -func Unmarshal(bs []byte, v interface{}) error { - root, err := parse(bs) - if err != nil { - return err - } - - return DecodeObject(v, root) -} - -// Decode reads the given input and decodes it into the structure -// given by `out`. -func Decode(out interface{}, in string) error { - obj, err := Parse(in) - if err != nil { - return err - } - - return DecodeObject(out, obj) -} - -// DecodeObject is a lower-level version of Decode. It decodes a -// raw Object into the given output. -func DecodeObject(out interface{}, n ast.Node) error { - val := reflect.ValueOf(out) - if val.Kind() != reflect.Ptr { - return errors.New("result must be a pointer") - } - - // If we have the file, we really decode the root node - if f, ok := n.(*ast.File); ok { - n = f.Node - } - - var d decoder - return d.decode("root", n, val.Elem()) -} - -type decoder struct { - stack []reflect.Kind -} - -func (d *decoder) decode(name string, node ast.Node, result reflect.Value) error { - k := result - - // If we have an interface with a valid value, we use that - // for the check. - if result.Kind() == reflect.Interface { - elem := result.Elem() - if elem.IsValid() { - k = elem - } - } - - // Push current onto stack unless it is an interface. - if k.Kind() != reflect.Interface { - d.stack = append(d.stack, k.Kind()) - - // Schedule a pop - defer func() { - d.stack = d.stack[:len(d.stack)-1] - }() - } - - switch k.Kind() { - case reflect.Bool: - return d.decodeBool(name, node, result) - case reflect.Float32, reflect.Float64: - return d.decodeFloat(name, node, result) - case reflect.Int, reflect.Int32, reflect.Int64: - return d.decodeInt(name, node, result) - case reflect.Interface: - // When we see an interface, we make our own thing - return d.decodeInterface(name, node, result) - case reflect.Map: - return d.decodeMap(name, node, result) - case reflect.Ptr: - return d.decodePtr(name, node, result) - case reflect.Slice: - return d.decodeSlice(name, node, result) - case reflect.String: - return d.decodeString(name, node, result) - case reflect.Struct: - return d.decodeStruct(name, node, result) - default: - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unknown kind to decode into: %s", name, k.Kind()), - } - } -} - -func (d *decoder) decodeBool(name string, node ast.Node, result reflect.Value) error { - switch n := node.(type) { - case *ast.LiteralType: - if n.Token.Type == token.BOOL { - v, err := strconv.ParseBool(n.Token.Text) - if err != nil { - return err - } - - result.Set(reflect.ValueOf(v)) - return nil - } - } - - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unknown type %T", name, node), - } -} - -func (d *decoder) decodeFloat(name string, node ast.Node, result reflect.Value) error { - switch n := node.(type) { - case *ast.LiteralType: - if n.Token.Type == token.FLOAT || n.Token.Type == token.NUMBER { - v, err := strconv.ParseFloat(n.Token.Text, 64) - if err != nil { - return err - } - - result.Set(reflect.ValueOf(v).Convert(result.Type())) - return nil - } - } - - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unknown type %T", name, node), - } -} - -func (d *decoder) decodeInt(name string, node ast.Node, result reflect.Value) error { - switch n := node.(type) { - case *ast.LiteralType: - switch n.Token.Type { - case token.NUMBER: - v, err := strconv.ParseInt(n.Token.Text, 0, 0) - if err != nil { - return err - } - - if result.Kind() == reflect.Interface { - result.Set(reflect.ValueOf(int(v))) - } else { - result.SetInt(v) - } - return nil - case token.STRING: - v, err := strconv.ParseInt(n.Token.Value().(string), 0, 0) - if err != nil { - return err - } - - if result.Kind() == reflect.Interface { - result.Set(reflect.ValueOf(int(v))) - } else { - result.SetInt(v) - } - return nil - } - } - - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unknown type %T", name, node), - } -} - -func (d *decoder) decodeInterface(name string, node ast.Node, result reflect.Value) error { - // When we see an ast.Node, we retain the value to enable deferred decoding. - // Very useful in situations where we want to preserve ast.Node information - // like Pos - if result.Type() == nodeType && result.CanSet() { - result.Set(reflect.ValueOf(node)) - return nil - } - - var set reflect.Value - redecode := true - - // For testing types, ObjectType should just be treated as a list. We - // set this to a temporary var because we want to pass in the real node. - testNode := node - if ot, ok := node.(*ast.ObjectType); ok { - testNode = ot.List - } - - switch n := testNode.(type) { - case *ast.ObjectList: - // If we're at the root or we're directly within a slice, then we - // decode objects into map[string]interface{}, otherwise we decode - // them into lists. - if len(d.stack) == 0 || d.stack[len(d.stack)-1] == reflect.Slice { - var temp map[string]interface{} - tempVal := reflect.ValueOf(temp) - result := reflect.MakeMap( - reflect.MapOf( - reflect.TypeOf(""), - tempVal.Type().Elem())) - - set = result - } else { - var temp []map[string]interface{} - tempVal := reflect.ValueOf(temp) - result := reflect.MakeSlice( - reflect.SliceOf(tempVal.Type().Elem()), 0, len(n.Items)) - set = result - } - case *ast.ObjectType: - // If we're at the root or we're directly within a slice, then we - // decode objects into map[string]interface{}, otherwise we decode - // them into lists. - if len(d.stack) == 0 || d.stack[len(d.stack)-1] == reflect.Slice { - var temp map[string]interface{} - tempVal := reflect.ValueOf(temp) - result := reflect.MakeMap( - reflect.MapOf( - reflect.TypeOf(""), - tempVal.Type().Elem())) - - set = result - } else { - var temp []map[string]interface{} - tempVal := reflect.ValueOf(temp) - result := reflect.MakeSlice( - reflect.SliceOf(tempVal.Type().Elem()), 0, 1) - set = result - } - case *ast.ListType: - var temp []interface{} - tempVal := reflect.ValueOf(temp) - result := reflect.MakeSlice( - reflect.SliceOf(tempVal.Type().Elem()), 0, 0) - set = result - case *ast.LiteralType: - switch n.Token.Type { - case token.BOOL: - var result bool - set = reflect.Indirect(reflect.New(reflect.TypeOf(result))) - case token.FLOAT: - var result float64 - set = reflect.Indirect(reflect.New(reflect.TypeOf(result))) - case token.NUMBER: - var result int - set = reflect.Indirect(reflect.New(reflect.TypeOf(result))) - case token.STRING, token.HEREDOC: - set = reflect.Indirect(reflect.New(reflect.TypeOf(""))) - default: - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: cannot decode into interface: %T", name, node), - } - } - default: - return fmt.Errorf( - "%s: cannot decode into interface: %T", - name, node) - } - - // Set the result to what its supposed to be, then reset - // result so we don't reflect into this method anymore. - result.Set(set) - - if redecode { - // Revisit the node so that we can use the newly instantiated - // thing and populate it. - if err := d.decode(name, node, result); err != nil { - return err - } - } - - return nil -} - -func (d *decoder) decodeMap(name string, node ast.Node, result reflect.Value) error { - if item, ok := node.(*ast.ObjectItem); ok { - node = &ast.ObjectList{Items: []*ast.ObjectItem{item}} - } - - if ot, ok := node.(*ast.ObjectType); ok { - node = ot.List - } - - n, ok := node.(*ast.ObjectList) - if !ok { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: not an object type for map (%T)", name, node), - } - } - - // If we have an interface, then we can address the interface, - // but not the slice itself, so get the element but set the interface - set := result - if result.Kind() == reflect.Interface { - result = result.Elem() - } - - resultType := result.Type() - resultElemType := resultType.Elem() - resultKeyType := resultType.Key() - if resultKeyType.Kind() != reflect.String { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: map must have string keys", name), - } - } - - // Make a map if it is nil - resultMap := result - if result.IsNil() { - resultMap = reflect.MakeMap( - reflect.MapOf(resultKeyType, resultElemType)) - } - - // Go through each element and decode it. - done := make(map[string]struct{}) - for _, item := range n.Items { - if item.Val == nil { - continue - } - - // github.com/hashicorp/terraform/issue/5740 - if len(item.Keys) == 0 { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: map must have string keys", name), - } - } - - // Get the key we're dealing with, which is the first item - keyStr := item.Keys[0].Token.Value().(string) - - // If we've already processed this key, then ignore it - if _, ok := done[keyStr]; ok { - continue - } - - // Determine the value. If we have more than one key, then we - // get the objectlist of only these keys. - itemVal := item.Val - if len(item.Keys) > 1 { - itemVal = n.Filter(keyStr) - done[keyStr] = struct{}{} - } - - // Make the field name - fieldName := fmt.Sprintf("%s.%s", name, keyStr) - - // Get the key/value as reflection values - key := reflect.ValueOf(keyStr) - val := reflect.Indirect(reflect.New(resultElemType)) - - // If we have a pre-existing value in the map, use that - oldVal := resultMap.MapIndex(key) - if oldVal.IsValid() { - val.Set(oldVal) - } - - // Decode! - if err := d.decode(fieldName, itemVal, val); err != nil { - return err - } - - // Set the value on the map - resultMap.SetMapIndex(key, val) - } - - // Set the final map if we can - set.Set(resultMap) - return nil -} - -func (d *decoder) decodePtr(name string, node ast.Node, result reflect.Value) error { - // Create an element of the concrete (non pointer) type and decode - // into that. Then set the value of the pointer to this type. - resultType := result.Type() - resultElemType := resultType.Elem() - val := reflect.New(resultElemType) - if err := d.decode(name, node, reflect.Indirect(val)); err != nil { - return err - } - - result.Set(val) - return nil -} - -func (d *decoder) decodeSlice(name string, node ast.Node, result reflect.Value) error { - // If we have an interface, then we can address the interface, - // but not the slice itself, so get the element but set the interface - set := result - if result.Kind() == reflect.Interface { - result = result.Elem() - } - // Create the slice if it isn't nil - resultType := result.Type() - resultElemType := resultType.Elem() - if result.IsNil() { - resultSliceType := reflect.SliceOf(resultElemType) - result = reflect.MakeSlice( - resultSliceType, 0, 0) - } - - // Figure out the items we'll be copying into the slice - var items []ast.Node - switch n := node.(type) { - case *ast.ObjectList: - items = make([]ast.Node, len(n.Items)) - for i, item := range n.Items { - items[i] = item - } - case *ast.ObjectType: - items = []ast.Node{n} - case *ast.ListType: - items = n.List - default: - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("unknown slice type: %T", node), - } - } - - for i, item := range items { - fieldName := fmt.Sprintf("%s[%d]", name, i) - - // Decode - val := reflect.Indirect(reflect.New(resultElemType)) - - // if item is an object that was decoded from ambiguous JSON and - // flattened, make sure it's expanded if it needs to decode into a - // defined structure. - item := expandObject(item, val) - - if err := d.decode(fieldName, item, val); err != nil { - return err - } - - // Append it onto the slice - result = reflect.Append(result, val) - } - - set.Set(result) - return nil -} - -// expandObject detects if an ambiguous JSON object was flattened to a List which -// should be decoded into a struct, and expands the ast to properly deocode. -func expandObject(node ast.Node, result reflect.Value) ast.Node { - item, ok := node.(*ast.ObjectItem) - if !ok { - return node - } - - elemType := result.Type() - - // our target type must be a struct - switch elemType.Kind() { - case reflect.Ptr: - switch elemType.Elem().Kind() { - case reflect.Struct: - //OK - default: - return node - } - case reflect.Struct: - //OK - default: - return node - } - - // A list value will have a key and field name. If it had more fields, - // it wouldn't have been flattened. - if len(item.Keys) != 2 { - return node - } - - keyToken := item.Keys[0].Token - item.Keys = item.Keys[1:] - - // we need to un-flatten the ast enough to decode - newNode := &ast.ObjectItem{ - Keys: []*ast.ObjectKey{ - &ast.ObjectKey{ - Token: keyToken, - }, - }, - Val: &ast.ObjectType{ - List: &ast.ObjectList{ - Items: []*ast.ObjectItem{item}, - }, - }, - } - - return newNode -} - -func (d *decoder) decodeString(name string, node ast.Node, result reflect.Value) error { - switch n := node.(type) { - case *ast.LiteralType: - switch n.Token.Type { - case token.NUMBER: - result.Set(reflect.ValueOf(n.Token.Text).Convert(result.Type())) - return nil - case token.STRING, token.HEREDOC: - result.Set(reflect.ValueOf(n.Token.Value()).Convert(result.Type())) - return nil - } - } - - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unknown type for string %T", name, node), - } -} - -func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value) error { - var item *ast.ObjectItem - if it, ok := node.(*ast.ObjectItem); ok { - item = it - node = it.Val - } - - if ot, ok := node.(*ast.ObjectType); ok { - node = ot.List - } - - // Handle the special case where the object itself is a literal. Previously - // the yacc parser would always ensure top-level elements were arrays. The new - // parser does not make the same guarantees, thus we need to convert any - // top-level literal elements into a list. - if _, ok := node.(*ast.LiteralType); ok && item != nil { - node = &ast.ObjectList{Items: []*ast.ObjectItem{item}} - } - - list, ok := node.(*ast.ObjectList) - if !ok { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: not an object type for struct (%T)", name, node), - } - } - - // This slice will keep track of all the structs we'll be decoding. - // There can be more than one struct if there are embedded structs - // that are squashed. - structs := make([]reflect.Value, 1, 5) - structs[0] = result - - // Compile the list of all the fields that we're going to be decoding - // from all the structs. - type field struct { - field reflect.StructField - val reflect.Value - } - fields := []field{} - for len(structs) > 0 { - structVal := structs[0] - structs = structs[1:] - - structType := structVal.Type() - for i := 0; i < structType.NumField(); i++ { - fieldType := structType.Field(i) - tagParts := strings.Split(fieldType.Tag.Get(tagName), ",") - - // Ignore fields with tag name "-" - if tagParts[0] == "-" { - continue - } - - if fieldType.Anonymous { - fieldKind := fieldType.Type.Kind() - if fieldKind != reflect.Struct { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: unsupported type to struct: %s", - fieldType.Name, fieldKind), - } - } - - // We have an embedded field. We "squash" the fields down - // if specified in the tag. - squash := false - for _, tag := range tagParts[1:] { - if tag == "squash" { - squash = true - break - } - } - - if squash { - structs = append( - structs, result.FieldByName(fieldType.Name)) - continue - } - } - - // Normal struct field, store it away - fields = append(fields, field{fieldType, structVal.Field(i)}) - } - } - - usedKeys := make(map[string]struct{}) - decodedFields := make([]string, 0, len(fields)) - decodedFieldsVal := make([]reflect.Value, 0) - unusedKeysVal := make([]reflect.Value, 0) - for _, f := range fields { - field, fieldValue := f.field, f.val - if !fieldValue.IsValid() { - // This should never happen - panic("field is not valid") - } - - // If we can't set the field, then it is unexported or something, - // and we just continue onwards. - if !fieldValue.CanSet() { - continue - } - - fieldName := field.Name - - tagValue := field.Tag.Get(tagName) - tagParts := strings.SplitN(tagValue, ",", 2) - if len(tagParts) >= 2 { - switch tagParts[1] { - case "decodedFields": - decodedFieldsVal = append(decodedFieldsVal, fieldValue) - continue - case "key": - if item == nil { - return &parser.PosError{ - Pos: node.Pos(), - Err: fmt.Errorf("%s: %s asked for 'key', impossible", - name, fieldName), - } - } - - fieldValue.SetString(item.Keys[0].Token.Value().(string)) - continue - case "unusedKeys": - unusedKeysVal = append(unusedKeysVal, fieldValue) - continue - } - } - - if tagParts[0] != "" { - fieldName = tagParts[0] - } - - // Determine the element we'll use to decode. If it is a single - // match (only object with the field), then we decode it exactly. - // If it is a prefix match, then we decode the matches. - filter := list.Filter(fieldName) - - prefixMatches := filter.Children() - matches := filter.Elem() - if len(matches.Items) == 0 && len(prefixMatches.Items) == 0 { - continue - } - - // Track the used key - usedKeys[fieldName] = struct{}{} - - // Create the field name and decode. We range over the elements - // because we actually want the value. - fieldName = fmt.Sprintf("%s.%s", name, fieldName) - if len(prefixMatches.Items) > 0 { - if err := d.decode(fieldName, prefixMatches, fieldValue); err != nil { - return err - } - } - for _, match := range matches.Items { - var decodeNode ast.Node = match.Val - if ot, ok := decodeNode.(*ast.ObjectType); ok { - decodeNode = &ast.ObjectList{Items: ot.List.Items} - } - - if err := d.decode(fieldName, decodeNode, fieldValue); err != nil { - return err - } - } - - decodedFields = append(decodedFields, field.Name) - } - - if len(decodedFieldsVal) > 0 { - // Sort it so that it is deterministic - sort.Strings(decodedFields) - - for _, v := range decodedFieldsVal { - v.Set(reflect.ValueOf(decodedFields)) - } - } - - return nil -} - -// findNodeType returns the type of ast.Node -func findNodeType() reflect.Type { - var nodeContainer struct { - Node ast.Node - } - value := reflect.ValueOf(nodeContainer).FieldByName("Node") - return value.Type() -} -- cgit v1.2.3