mirror of
https://github.com/mikefarah/yq.git
synced 2024-11-14 07:08:06 +00:00
426 lines
18 KiB
Go
426 lines
18 KiB
Go
// Use the top level Evaluator or StreamEvaluator to evaluate expressions and return matches.
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package yqlib
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import (
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"container/list"
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"fmt"
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"math"
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"strconv"
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"strings"
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logging "gopkg.in/op/go-logging.v1"
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)
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var ExpressionParser ExpressionParserInterface
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func InitExpressionParser() {
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if ExpressionParser == nil {
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ExpressionParser = newExpressionParser()
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}
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}
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var log = logging.MustGetLogger("yq-lib")
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var PrettyPrintExp = `(... | (select(tag != "!!str"), select(tag == "!!str") | select(test("(?i)^(y|yes|n|no|on|off)$") | not)) ) style=""`
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// GetLogger returns the yq logger instance.
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func GetLogger() *logging.Logger {
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return log
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}
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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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CheckForPostTraverse bool
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}
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var orOpType = &operationType{Type: "OR", NumArgs: 2, Precedence: 20, Handler: orOperator}
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var andOpType = &operationType{Type: "AND", NumArgs: 2, Precedence: 20, Handler: andOperator}
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var reduceOpType = &operationType{Type: "REDUCE", NumArgs: 2, Precedence: 35, Handler: reduceOperator}
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var blockOpType = &operationType{Type: "BLOCK", Precedence: 10, NumArgs: 2, Handler: emptyOperator}
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var unionOpType = &operationType{Type: "UNION", NumArgs: 2, Precedence: 10, Handler: unionOperator}
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var pipeOpType = &operationType{Type: "PIPE", NumArgs: 2, Precedence: 30, Handler: pipeOperator}
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var assignOpType = &operationType{Type: "ASSIGN", NumArgs: 2, Precedence: 40, Handler: assignUpdateOperator}
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var addAssignOpType = &operationType{Type: "ADD_ASSIGN", NumArgs: 2, Precedence: 40, Handler: addAssignOperator}
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var subtractAssignOpType = &operationType{Type: "SUBTRACT_ASSIGN", NumArgs: 2, Precedence: 40, Handler: subtractAssignOperator}
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var assignAttributesOpType = &operationType{Type: "ASSIGN_ATTRIBUTES", NumArgs: 2, Precedence: 40, Handler: assignAttributesOperator}
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var assignStyleOpType = &operationType{Type: "ASSIGN_STYLE", NumArgs: 2, Precedence: 40, Handler: assignStyleOperator}
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var assignVariableOpType = &operationType{Type: "ASSIGN_VARIABLE", NumArgs: 2, Precedence: 40, Handler: useWithPipe}
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var assignTagOpType = &operationType{Type: "ASSIGN_TAG", NumArgs: 2, Precedence: 40, Handler: assignTagOperator}
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var assignCommentOpType = &operationType{Type: "ASSIGN_COMMENT", NumArgs: 2, Precedence: 40, Handler: assignCommentsOperator}
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var assignAnchorOpType = &operationType{Type: "ASSIGN_ANCHOR", NumArgs: 2, Precedence: 40, Handler: assignAnchorOperator}
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var assignAliasOpType = &operationType{Type: "ASSIGN_ALIAS", NumArgs: 2, Precedence: 40, Handler: assignAliasOperator}
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var multiplyOpType = &operationType{Type: "MULTIPLY", NumArgs: 2, Precedence: 42, Handler: multiplyOperator}
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var multiplyAssignOpType = &operationType{Type: "MULTIPLY_ASSIGN", NumArgs: 2, Precedence: 42, Handler: multiplyAssignOperator}
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var divideOpType = &operationType{Type: "DIVIDE", NumArgs: 2, Precedence: 42, Handler: divideOperator}
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var moduloOpType = &operationType{Type: "MODULO", NumArgs: 2, Precedence: 42, Handler: moduloOperator}
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var addOpType = &operationType{Type: "ADD", NumArgs: 2, Precedence: 42, Handler: addOperator}
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var subtractOpType = &operationType{Type: "SUBTRACT", NumArgs: 2, Precedence: 42, Handler: subtractOperator}
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var alternativeOpType = &operationType{Type: "ALTERNATIVE", NumArgs: 2, Precedence: 42, Handler: alternativeOperator}
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var equalsOpType = &operationType{Type: "EQUALS", NumArgs: 2, Precedence: 40, Handler: equalsOperator}
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var notEqualsOpType = &operationType{Type: "NOT_EQUALS", NumArgs: 2, Precedence: 40, Handler: notEqualsOperator}
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var compareOpType = &operationType{Type: "COMPARE", NumArgs: 2, Precedence: 40, Handler: compareOperator}
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// createmap needs to be above union, as we use union to build the components of the objects
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var createMapOpType = &operationType{Type: "CREATE_MAP", NumArgs: 2, Precedence: 15, Handler: createMapOperator}
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var shortPipeOpType = &operationType{Type: "SHORT_PIPE", NumArgs: 2, Precedence: 45, Handler: pipeOperator}
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var lengthOpType = &operationType{Type: "LENGTH", NumArgs: 0, Precedence: 50, Handler: lengthOperator}
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var lineOpType = &operationType{Type: "LINE", NumArgs: 0, Precedence: 50, Handler: lineOperator}
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var columnOpType = &operationType{Type: "LINE", NumArgs: 0, Precedence: 50, Handler: columnOperator}
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var expressionOpType = &operationType{Type: "EXP", NumArgs: 0, Precedence: 50, Handler: expressionOperator}
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var collectOpType = &operationType{Type: "COLLECT", NumArgs: 1, Precedence: 50, Handler: collectOperator}
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var mapOpType = &operationType{Type: "MAP", NumArgs: 1, Precedence: 50, Handler: mapOperator}
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var filterOpType = &operationType{Type: "FILTER", NumArgs: 1, Precedence: 50, Handler: filterOperator}
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var errorOpType = &operationType{Type: "ERROR", NumArgs: 1, Precedence: 50, Handler: errorOperator}
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var pickOpType = &operationType{Type: "PICK", NumArgs: 1, Precedence: 50, Handler: pickOperator}
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var evalOpType = &operationType{Type: "EVAL", NumArgs: 1, Precedence: 50, Handler: evalOperator}
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var mapValuesOpType = &operationType{Type: "MAP_VALUES", NumArgs: 1, Precedence: 50, Handler: mapValuesOperator}
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var formatDateTimeOpType = &operationType{Type: "FORMAT_DATE_TIME", NumArgs: 1, Precedence: 50, Handler: formatDateTime}
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var withDtFormatOpType = &operationType{Type: "WITH_DATE_TIME_FORMAT", NumArgs: 1, Precedence: 50, Handler: withDateTimeFormat}
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var nowOpType = &operationType{Type: "NOW", NumArgs: 0, Precedence: 50, Handler: nowOp}
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var tzOpType = &operationType{Type: "TIMEZONE", NumArgs: 1, Precedence: 50, Handler: tzOp}
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var fromUnixOpType = &operationType{Type: "FROM_UNIX", NumArgs: 0, Precedence: 50, Handler: fromUnixOp}
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var toUnixOpType = &operationType{Type: "TO_UNIX", NumArgs: 0, Precedence: 50, Handler: toUnixOp}
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var encodeOpType = &operationType{Type: "ENCODE", NumArgs: 0, Precedence: 50, Handler: encodeOperator}
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var decodeOpType = &operationType{Type: "DECODE", NumArgs: 0, Precedence: 50, Handler: decodeOperator}
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var anyOpType = &operationType{Type: "ANY", NumArgs: 0, Precedence: 50, Handler: anyOperator}
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var allOpType = &operationType{Type: "ALL", NumArgs: 0, Precedence: 50, Handler: allOperator}
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var containsOpType = &operationType{Type: "CONTAINS", NumArgs: 1, Precedence: 50, Handler: containsOperator}
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var anyConditionOpType = &operationType{Type: "ANY_CONDITION", NumArgs: 1, Precedence: 50, Handler: anyOperator}
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var allConditionOpType = &operationType{Type: "ALL_CONDITION", NumArgs: 1, Precedence: 50, Handler: allOperator}
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var toEntriesOpType = &operationType{Type: "TO_ENTRIES", NumArgs: 0, Precedence: 52, Handler: toEntriesOperator, CheckForPostTraverse: true}
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var fromEntriesOpType = &operationType{Type: "FROM_ENTRIES", NumArgs: 0, Precedence: 50, Handler: fromEntriesOperator}
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var withEntriesOpType = &operationType{Type: "WITH_ENTRIES", NumArgs: 1, Precedence: 50, Handler: withEntriesOperator}
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var withOpType = &operationType{Type: "WITH", NumArgs: 1, Precedence: 50, Handler: withOperator}
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var splitDocumentOpType = &operationType{Type: "SPLIT_DOC", NumArgs: 0, Precedence: 50, Handler: splitDocumentOperator}
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var getVariableOpType = &operationType{Type: "GET_VARIABLE", NumArgs: 0, Precedence: 55, Handler: getVariableOperator}
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var getStyleOpType = &operationType{Type: "GET_STYLE", NumArgs: 0, Precedence: 50, Handler: getStyleOperator}
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var getTagOpType = &operationType{Type: "GET_TAG", NumArgs: 0, Precedence: 50, Handler: getTagOperator}
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var getKindOpType = &operationType{Type: "GET_KIND", NumArgs: 0, Precedence: 50, Handler: getKindOperator}
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var getKeyOpType = &operationType{Type: "GET_KEY", NumArgs: 0, Precedence: 50, Handler: getKeyOperator}
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var isKeyOpType = &operationType{Type: "IS_KEY", NumArgs: 0, Precedence: 50, Handler: isKeyOperator}
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var getParentOpType = &operationType{Type: "GET_PARENT", NumArgs: 0, Precedence: 50, Handler: getParentOperator}
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var getCommentOpType = &operationType{Type: "GET_COMMENT", NumArgs: 0, Precedence: 50, Handler: getCommentsOperator}
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var getAnchorOpType = &operationType{Type: "GET_ANCHOR", NumArgs: 0, Precedence: 50, Handler: getAnchorOperator}
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var getAliasOpType = &operationType{Type: "GET_ALIAS", NumArgs: 0, Precedence: 50, Handler: getAliasOperator}
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var getDocumentIndexOpType = &operationType{Type: "GET_DOCUMENT_INDEX", NumArgs: 0, Precedence: 50, Handler: getDocumentIndexOperator}
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var getFilenameOpType = &operationType{Type: "GET_FILENAME", NumArgs: 0, Precedence: 50, Handler: getFilenameOperator}
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var getFileIndexOpType = &operationType{Type: "GET_FILE_INDEX", NumArgs: 0, Precedence: 50, Handler: getFileIndexOperator}
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var getPathOpType = &operationType{Type: "GET_PATH", NumArgs: 0, Precedence: 50, Handler: getPathOperator}
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var setPathOpType = &operationType{Type: "SET_PATH", NumArgs: 1, Precedence: 50, Handler: setPathOperator}
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var delPathsOpType = &operationType{Type: "DEL_PATHS", NumArgs: 1, Precedence: 50, Handler: delPathsOperator}
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var explodeOpType = &operationType{Type: "EXPLODE", NumArgs: 1, Precedence: 50, Handler: explodeOperator}
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var sortByOpType = &operationType{Type: "SORT_BY", NumArgs: 1, Precedence: 50, Handler: sortByOperator}
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var reverseOpType = &operationType{Type: "REVERSE", NumArgs: 0, Precedence: 50, Handler: reverseOperator}
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var sortOpType = &operationType{Type: "SORT", NumArgs: 0, Precedence: 50, Handler: sortOperator}
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var shuffleOpType = &operationType{Type: "SHUFFLE", NumArgs: 0, Precedence: 50, Handler: shuffleOperator}
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var sortKeysOpType = &operationType{Type: "SORT_KEYS", NumArgs: 1, Precedence: 50, Handler: sortKeysOperator}
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var joinStringOpType = &operationType{Type: "JOIN", NumArgs: 1, Precedence: 50, Handler: joinStringOperator}
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var subStringOpType = &operationType{Type: "SUBSTR", NumArgs: 1, Precedence: 50, Handler: substituteStringOperator}
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var matchOpType = &operationType{Type: "MATCH", NumArgs: 1, Precedence: 50, Handler: matchOperator}
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var captureOpType = &operationType{Type: "CAPTURE", NumArgs: 1, Precedence: 50, Handler: captureOperator}
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var testOpType = &operationType{Type: "TEST", NumArgs: 1, Precedence: 50, Handler: testOperator}
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var splitStringOpType = &operationType{Type: "SPLIT", NumArgs: 1, Precedence: 50, Handler: splitStringOperator}
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var changeCaseOpType = &operationType{Type: "CHANGE_CASE", NumArgs: 0, Precedence: 50, Handler: changeCaseOperator}
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var trimOpType = &operationType{Type: "TRIM", NumArgs: 0, Precedence: 50, Handler: trimSpaceOperator}
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var loadOpType = &operationType{Type: "LOAD", NumArgs: 1, Precedence: 52, Handler: loadYamlOperator}
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var keysOpType = &operationType{Type: "KEYS", NumArgs: 0, Precedence: 50, Handler: keysOperator}
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var collectObjectOpType = &operationType{Type: "COLLECT_OBJECT", NumArgs: 0, Precedence: 50, Handler: collectObjectOperator}
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var traversePathOpType = &operationType{Type: "TRAVERSE_PATH", NumArgs: 0, Precedence: 55, Handler: traversePathOperator}
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var traverseArrayOpType = &operationType{Type: "TRAVERSE_ARRAY", NumArgs: 2, Precedence: 50, Handler: traverseArrayOperator}
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var selfReferenceOpType = &operationType{Type: "SELF", NumArgs: 0, Precedence: 55, Handler: selfOperator}
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var valueOpType = &operationType{Type: "VALUE", NumArgs: 0, Precedence: 50, Handler: valueOperator}
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var referenceOpType = &operationType{Type: "REF", NumArgs: 0, Precedence: 50, Handler: referenceOperator}
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var envOpType = &operationType{Type: "ENV", NumArgs: 0, Precedence: 50, Handler: envOperator}
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var notOpType = &operationType{Type: "NOT", NumArgs: 0, Precedence: 50, Handler: notOperator}
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var toNumberOpType = &operationType{Type: "TO_NUMBER", NumArgs: 0, Precedence: 50, Handler: toNumberOperator}
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var emptyOpType = &operationType{Type: "EMPTY", Precedence: 50, Handler: emptyOperator}
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var envsubstOpType = &operationType{Type: "ENVSUBST", NumArgs: 0, Precedence: 50, Handler: envsubstOperator}
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var recursiveDescentOpType = &operationType{Type: "RECURSIVE_DESCENT", NumArgs: 0, Precedence: 50, Handler: recursiveDescentOperator}
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var selectOpType = &operationType{Type: "SELECT", NumArgs: 1, Precedence: 50, Handler: selectOperator}
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var hasOpType = &operationType{Type: "HAS", NumArgs: 1, Precedence: 50, Handler: hasOperator}
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var uniqueOpType = &operationType{Type: "UNIQUE", NumArgs: 0, Precedence: 50, Handler: unique}
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var uniqueByOpType = &operationType{Type: "UNIQUE_BY", NumArgs: 1, Precedence: 50, Handler: uniqueBy}
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var groupByOpType = &operationType{Type: "GROUP_BY", NumArgs: 1, Precedence: 50, Handler: groupBy}
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var flattenOpType = &operationType{Type: "FLATTEN_BY", NumArgs: 0, Precedence: 50, Handler: flattenOp}
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var deleteChildOpType = &operationType{Type: "DELETE", NumArgs: 1, Precedence: 40, Handler: deleteChildOperator}
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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
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}
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func recurseNodeArrayEqual(lhs *CandidateNode, rhs *CandidateNode) bool {
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if len(lhs.Content) != len(rhs.Content) {
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return false
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}
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for index := 0; index < len(lhs.Content); index = index + 1 {
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if !recursiveNodeEqual(lhs.Content[index], rhs.Content[index]) {
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return false
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}
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}
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return true
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}
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func findInArray(array *CandidateNode, item *CandidateNode) int {
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for index := 0; index < len(array.Content); index = index + 1 {
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if recursiveNodeEqual(array.Content[index], item) {
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return index
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}
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}
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return -1
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}
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func findKeyInMap(dataMap *CandidateNode, item *CandidateNode) int {
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for index := 0; index < len(dataMap.Content); index = index + 2 {
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if recursiveNodeEqual(dataMap.Content[index], item) {
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return index
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}
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}
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return -1
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}
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func recurseNodeObjectEqual(lhs *CandidateNode, rhs *CandidateNode) bool {
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if len(lhs.Content) != len(rhs.Content) {
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return false
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}
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for index := 0; index < len(lhs.Content); index = index + 2 {
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key := lhs.Content[index]
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value := lhs.Content[index+1]
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indexInRHS := findInArray(rhs, key)
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if indexInRHS == -1 || !recursiveNodeEqual(value, rhs.Content[indexInRHS+1]) {
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return false
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}
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}
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return true
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}
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func parseSnippet(value string) (*CandidateNode, error) {
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if value == "" {
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return &CandidateNode{
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Kind: ScalarNode,
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Tag: "!!null",
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}, nil
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}
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decoder := NewYamlDecoder(ConfiguredYamlPreferences)
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err := decoder.Init(strings.NewReader(value))
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if err != nil {
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return nil, err
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}
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result, err := decoder.Decode()
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if err != nil {
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return nil, err
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}
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result.Line = 0
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result.Column = 0
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return result, err
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}
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func recursiveNodeEqual(lhs *CandidateNode, rhs *CandidateNode) bool {
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if lhs.Kind != rhs.Kind {
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return false
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}
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if lhs.Kind == ScalarNode {
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//process custom tags of scalar nodes.
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//dont worry about matching tags of maps or arrays.
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lhsTag := lhs.guessTagFromCustomType()
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rhsTag := rhs.guessTagFromCustomType()
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if lhsTag != rhsTag {
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return false
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}
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}
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if lhs.Tag == "!!null" {
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return true
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} else if lhs.Kind == ScalarNode {
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return lhs.Value == rhs.Value
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} else if lhs.Kind == SequenceNode {
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return recurseNodeArrayEqual(lhs, rhs)
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} else if lhs.Kind == MappingNode {
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return recurseNodeObjectEqual(lhs, rhs)
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}
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return false
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}
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// yaml numbers can be hex and octal encoded...
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func parseInt64(numberString string) (string, int64, error) {
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if strings.HasPrefix(numberString, "0x") ||
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strings.HasPrefix(numberString, "0X") {
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num, err := strconv.ParseInt(numberString[2:], 16, 64)
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return "0x%X", num, err
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} else if strings.HasPrefix(numberString, "0o") {
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num, err := strconv.ParseInt(numberString[2:], 8, 64)
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return "0o%o", num, err
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}
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num, err := strconv.ParseInt(numberString, 10, 64)
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return "%v", num, err
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}
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func parseInt(numberString string) (int, error) {
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_, parsed, err := parseInt64(numberString)
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if err != nil {
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return 0, err
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} else if parsed > math.MaxInt || parsed < math.MinInt {
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return 0, fmt.Errorf("%v is not within [%v, %v]", parsed, math.MinInt, math.MaxInt)
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}
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return int(parsed), err
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}
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func headAndLineComment(node *CandidateNode) string {
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return headComment(node) + lineComment(node)
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}
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func headComment(node *CandidateNode) string {
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return strings.Replace(node.HeadComment, "#", "", 1)
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}
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func lineComment(node *CandidateNode) string {
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return strings.Replace(node.LineComment, "#", "", 1)
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}
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func footComment(node *CandidateNode) string {
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return strings.Replace(node.FootComment, "#", "", 1)
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}
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func createValueOperation(value interface{}, stringValue string) *Operation {
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log.Debug("creating value op for string %v", stringValue)
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var node = createScalarNode(value, stringValue)
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return &Operation{
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OperationType: valueOpType,
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Value: value,
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StringValue: stringValue,
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CandidateNode: 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 == nil {
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return "OP IS NIL"
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}
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if p.OperationType == traversePathOpType {
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return fmt.Sprintf("%v", p.Value)
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} else if p.OperationType == selfReferenceOpType {
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return "SELF"
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} else if p.OperationType == valueOpType {
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return fmt.Sprintf("%v (%T)", p.Value, p.Value)
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}
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return fmt.Sprintf("%v", p.OperationType.Type)
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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 := fmt.Sprintf("%v results\n", collection.Len())
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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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if node == nil {
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return "-- nil --"
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}
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tag := node.Tag
|
|
if node.Kind == AliasNode {
|
|
tag = "alias"
|
|
}
|
|
valueToUse := node.Value
|
|
if valueToUse == "" {
|
|
valueToUse = fmt.Sprintf("%v kids", len(node.Content))
|
|
}
|
|
return fmt.Sprintf(`D%v, P%v, %v (%v)::%v`, node.GetDocument(), node.GetNicePath(), KindString(node.Kind), tag, valueToUse)
|
|
}
|
|
|
|
func NodeContentToString(node *CandidateNode, depth int) string {
|
|
if !log.IsEnabledFor(logging.DEBUG) {
|
|
return ""
|
|
}
|
|
var sb strings.Builder
|
|
for _, child := range node.Content {
|
|
for i := 0; i < depth; i++ {
|
|
sb.WriteString(" ")
|
|
}
|
|
sb.WriteString("- ")
|
|
sb.WriteString(NodeToString(child))
|
|
sb.WriteString("\n")
|
|
sb.WriteString(NodeContentToString(child, depth+1))
|
|
}
|
|
return sb.String()
|
|
}
|
|
|
|
func KindString(kind Kind) string {
|
|
switch kind {
|
|
case ScalarNode:
|
|
return "ScalarNode"
|
|
case SequenceNode:
|
|
return "SequenceNode"
|
|
case MappingNode:
|
|
return "MappingNode"
|
|
case AliasNode:
|
|
return "AliasNode"
|
|
default:
|
|
return "unknown!"
|
|
}
|
|
}
|