Fixed newline issue https://github.com/mikefarah/yq/issues/855

pkg/yqlib/expression_processing_test.go

@@ -7,11 +7,24 @@ import (
 	"github.com/mikefarah/yq/v4/test"
 )
 
+var variableWithNewLine = `"cat
+"`
+
 var pathTests = []struct {
 	path            string
 	expectedTokens  []interface{}
 	expectedPostFix []interface{}
 }{
+	{
+		".a\n",
+		append(make([]interface{}, 0), "a"),
+		append(make([]interface{}, 0), "a"),
+	},
+	{
+		variableWithNewLine,
+		append(make([]interface{}, 0), "cat\n (string)"),
+		append(make([]interface{}, 0), "cat\n (string)"),
+	},
 	{
 		`.[0]`,
 		append(make([]interface{}, 0), "SELF", "TRAVERSE_ARRAY", "[", "0 (int64)", "]"),

pkg/yqlib/expression_tokeniser.go

@@ -320,7 +320,7 @@ func initLexer() (*lex.Lexer, error) {
 	lexer.Add([]byte("( |\t|\n|\r)+"), skip)
 
 	lexer.Add([]byte(`\."[^ "]+"\??`), pathToken(true))
-	lexer.Add([]byte(`\.[^ \}\{\:\[\],\|\.\[\(\)=]+\??`), pathToken(false))
+	lexer.Add([]byte(`\.[^ \}\{\:\[\],\|\.\[\(\)=\n]+\??`), pathToken(false))
 	lexer.Add([]byte(`\.`), selfToken())
 
 	lexer.Add([]byte(`\|`), opToken(pipeOpType))

pkg/yqlib/operator_traverse_path_test.go

@@ -35,6 +35,14 @@ var traversePathOperatorScenarios = []expressionScenario{
 			"D0, P[0 0], (!!int)::1\n",
 		},
 	},
+	{
+		skipDoc:    true,
+		document:   `b: cat`,
+		expression: ".b\n",
+		expected: []string{
+			"D0, P[b], (!!str)::cat\n",
+		},
+	},
 	{
 		skipDoc:    true,
 		document:   `[[[1]]]`,