mirror of
https://github.com/mikefarah/yq.git
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186 lines
7.6 KiB
Go
186 lines
7.6 KiB
Go
package yqlib
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import (
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"bytes"
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"container/list"
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"fmt"
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logging "gopkg.in/op/go-logging.v1"
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yaml "gopkg.in/yaml.v3"
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)
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var log = logging.MustGetLogger("yq-lib")
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type OperationType struct {
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Type string
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NumArgs uint // number of arguments to the op
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Precedence uint
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Handler OperatorHandler
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}
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// operators TODO:
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// - keys operator for controlling key metadata (particularly anchors/aliases)
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// - mergeEmpty (sets only if the document is empty, do I do that now?)
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var Or = &OperationType{Type: "OR", NumArgs: 2, Precedence: 20, Handler: OrOperator}
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var And = &OperationType{Type: "AND", NumArgs: 2, Precedence: 20, Handler: AndOperator}
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var Union = &OperationType{Type: "UNION", NumArgs: 2, Precedence: 10, Handler: UnionOperator}
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var Pipe = &OperationType{Type: "PIPE", NumArgs: 2, Precedence: 30, Handler: PipeOperator}
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var Assign = &OperationType{Type: "ASSIGN", NumArgs: 2, Precedence: 40, Handler: AssignUpdateOperator}
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var AddAssign = &OperationType{Type: "ADD_ASSIGN", NumArgs: 2, Precedence: 40, Handler: AddAssignOperator}
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var AssignAttributes = &OperationType{Type: "ASSIGN_ATTRIBUTES", NumArgs: 2, Precedence: 40, Handler: AssignAttributesOperator}
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var AssignStyle = &OperationType{Type: "ASSIGN_STYLE", NumArgs: 2, Precedence: 40, Handler: AssignStyleOperator}
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var AssignTag = &OperationType{Type: "ASSIGN_TAG", NumArgs: 2, Precedence: 40, Handler: AssignTagOperator}
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var AssignComment = &OperationType{Type: "ASSIGN_COMMENT", NumArgs: 2, Precedence: 40, Handler: AssignCommentsOperator}
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var AssignAnchor = &OperationType{Type: "ASSIGN_ANCHOR", NumArgs: 2, Precedence: 40, Handler: AssignAnchorOperator}
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var AssignAlias = &OperationType{Type: "ASSIGN_ALIAS", NumArgs: 2, Precedence: 40, Handler: AssignAliasOperator}
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var Multiply = &OperationType{Type: "MULTIPLY", NumArgs: 2, Precedence: 45, Handler: MultiplyOperator}
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var Add = &OperationType{Type: "ADD", NumArgs: 2, Precedence: 45, Handler: AddOperator}
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var Alternative = &OperationType{Type: "ALTERNATIVE", NumArgs: 2, Precedence: 45, Handler: AlternativeOperator}
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var Equals = &OperationType{Type: "EQUALS", NumArgs: 2, Precedence: 40, Handler: EqualsOperator}
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var CreateMap = &OperationType{Type: "CREATE_MAP", NumArgs: 2, Precedence: 40, Handler: CreateMapOperator}
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var ShortPipe = &OperationType{Type: "SHORT_PIPE", NumArgs: 2, Precedence: 45, Handler: PipeOperator}
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var Length = &OperationType{Type: "LENGTH", NumArgs: 0, Precedence: 50, Handler: LengthOperator}
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var Collect = &OperationType{Type: "COLLECT", NumArgs: 0, Precedence: 50, Handler: CollectOperator}
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var GetStyle = &OperationType{Type: "GET_STYLE", NumArgs: 0, Precedence: 50, Handler: GetStyleOperator}
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var GetTag = &OperationType{Type: "GET_TAG", NumArgs: 0, Precedence: 50, Handler: GetTagOperator}
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var GetComment = &OperationType{Type: "GET_COMMENT", NumArgs: 0, Precedence: 50, Handler: GetCommentsOperator}
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var GetAnchor = &OperationType{Type: "GET_ANCHOR", NumArgs: 0, Precedence: 50, Handler: GetAnchorOperator}
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var GetAlias = &OperationType{Type: "GET_ALIAS", NumArgs: 0, Precedence: 50, Handler: GetAliasOperator}
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var GetDocumentIndex = &OperationType{Type: "GET_DOCUMENT_INDEX", NumArgs: 0, Precedence: 50, Handler: GetDocumentIndexOperator}
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var GetFilename = &OperationType{Type: "GET_FILENAME", NumArgs: 0, Precedence: 50, Handler: GetFilenameOperator}
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var GetFileIndex = &OperationType{Type: "GET_FILE_INDEX", NumArgs: 0, Precedence: 50, Handler: GetFileIndexOperator}
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var GetPath = &OperationType{Type: "GET_PATH", NumArgs: 0, Precedence: 50, Handler: GetPathOperator}
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var Explode = &OperationType{Type: "EXPLODE", NumArgs: 1, Precedence: 50, Handler: ExplodeOperator}
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var SortKeys = &OperationType{Type: "SORT_KEYS", NumArgs: 1, Precedence: 50, Handler: SortKeysOperator}
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var CollectObject = &OperationType{Type: "COLLECT_OBJECT", NumArgs: 0, Precedence: 50, Handler: CollectObjectOperator}
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var TraversePath = &OperationType{Type: "TRAVERSE_PATH", NumArgs: 0, Precedence: 50, Handler: TraversePathOperator}
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var TraverseArray = &OperationType{Type: "TRAVERSE_ARRAY", NumArgs: 1, Precedence: 50, Handler: TraverseArrayOperator}
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var DocumentFilter = &OperationType{Type: "DOCUMENT_FILTER", NumArgs: 0, Precedence: 50, Handler: TraversePathOperator}
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var SelfReference = &OperationType{Type: "SELF", NumArgs: 0, Precedence: 50, Handler: SelfOperator}
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var ValueOp = &OperationType{Type: "VALUE", NumArgs: 0, Precedence: 50, Handler: ValueOperator}
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var EnvOp = &OperationType{Type: "ENV", NumArgs: 0, Precedence: 50, Handler: EnvOperator}
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var Not = &OperationType{Type: "NOT", NumArgs: 0, Precedence: 50, Handler: NotOperator}
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var Empty = &OperationType{Type: "EMPTY", NumArgs: 50, Handler: EmptyOperator}
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var RecursiveDescent = &OperationType{Type: "RECURSIVE_DESCENT", NumArgs: 0, Precedence: 50, Handler: RecursiveDescentOperator}
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var Select = &OperationType{Type: "SELECT", NumArgs: 1, Precedence: 50, Handler: SelectOperator}
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var Has = &OperationType{Type: "HAS", NumArgs: 1, Precedence: 50, Handler: HasOperator}
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var DeleteChild = &OperationType{Type: "DELETE", NumArgs: 1, Precedence: 40, Handler: DeleteChildOperator}
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var DeleteImmediateChild = &OperationType{Type: "DELETE_IMMEDIATE_CHILD", NumArgs: 1, Precedence: 40, Handler: DeleteImmediateChildOperator}
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type Operation struct {
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OperationType *OperationType
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Value interface{}
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StringValue string
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CandidateNode *CandidateNode // used for Value Path elements
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Preferences interface{}
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UpdateAssign bool // used for assign ops, when true it means we evaluate the rhs given the lhs (instead of matching nodes)
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}
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func CreateValueOperation(value interface{}, stringValue string) *Operation {
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var node yaml.Node = yaml.Node{Kind: yaml.ScalarNode}
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node.Value = stringValue
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switch value.(type) {
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case float32, float64:
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node.Tag = "!!float"
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case int, int64, int32:
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node.Tag = "!!int"
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case bool:
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node.Tag = "!!bool"
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case string:
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node.Tag = "!!str"
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case nil:
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node.Tag = "!!null"
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}
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return &Operation{
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OperationType: ValueOp,
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Value: value,
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StringValue: stringValue,
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CandidateNode: &CandidateNode{Node: &node},
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}
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}
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// debugging purposes only
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func (p *Operation) toString() string {
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if p.OperationType == TraversePath {
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return fmt.Sprintf("%v", p.Value)
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} else if p.OperationType == DocumentFilter {
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return fmt.Sprintf("d%v", p.Value)
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} else if p.OperationType == SelfReference {
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return "SELF"
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} else if p.OperationType == ValueOp {
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return fmt.Sprintf("%v (%T)", p.Value, p.Value)
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} else {
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return fmt.Sprintf("%v", p.OperationType.Type)
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}
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}
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//use for debugging only
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func NodesToString(collection *list.List) string {
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if !log.IsEnabledFor(logging.DEBUG) {
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return ""
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}
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result := ""
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for el := collection.Front(); el != nil; el = el.Next() {
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result = result + "\n" + NodeToString(el.Value.(*CandidateNode))
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}
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return result
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}
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func NodeToString(node *CandidateNode) string {
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if !log.IsEnabledFor(logging.DEBUG) {
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return ""
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}
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value := node.Node
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if value == nil {
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return "-- nil --"
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}
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buf := new(bytes.Buffer)
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encoder := yaml.NewEncoder(buf)
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errorEncoding := encoder.Encode(value)
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if errorEncoding != nil {
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log.Error("Error debugging node, %v", errorEncoding.Error())
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}
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encoder.Close()
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tag := value.Tag
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if value.Kind == yaml.DocumentNode {
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tag = "doc"
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} else if value.Kind == yaml.AliasNode {
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tag = "alias"
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}
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return fmt.Sprintf(`D%v, P%v, (%v)::%v`, node.Document, node.Path, tag, buf.String())
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}
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func KindString(kind yaml.Kind) string {
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switch kind {
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case yaml.ScalarNode:
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return "ScalarNode"
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case yaml.SequenceNode:
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return "SequenceNode"
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case yaml.MappingNode:
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return "MappingNode"
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case yaml.DocumentNode:
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return "DocumentNode"
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case yaml.AliasNode:
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return "AliasNode"
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default:
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return "unknown!"
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}
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}
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