From 67fb924e0e7835c9a243469d04fe1470106bbd63 Mon Sep 17 00:00:00 2001
From: Mike Farah <mikefarah@gmail.com>
Date: Fri, 28 Feb 2020 15:24:16 +1100
Subject: [PATCH] Can find array elements bu value

---
 cmd/commands_test.go     | 37 +++++++++++++++++++++++++++++++++++++
 pkg/yqlib/path_parser.go |  8 ++++++++
 2 files changed, 45 insertions(+)

diff --git a/cmd/commands_test.go b/cmd/commands_test.go
index 1f365164..10e85ad6 100644
--- a/cmd/commands_test.go
+++ b/cmd/commands_test.go
@@ -2019,6 +2019,43 @@ func TestReadExpression(t *testing.T) {
 	test.AssertResult(t, expectedOutput, result.Output)
 }
 
+func TestReadFindValueCmd(t *testing.T) {
+	content := `- cat
+- dog
+- rat
+`
+	filename := test.WriteTempYamlFile(content)
+	defer test.RemoveTempYamlFile(filename)
+	cmd := getRootCommand()
+	result := test.RunCmd(cmd, fmt.Sprintf("r %s (.==dog)", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	expectedOutput := `dog
+`
+	test.AssertResult(t, expectedOutput, result.Output)
+}
+
+func TestReadFindValueDeepCmd(t *testing.T) {
+	content := `animals:
+  - cat
+  - dog
+  - rat
+`
+	filename := test.WriteTempYamlFile(content)
+	defer test.RemoveTempYamlFile(filename)
+	cmd := getRootCommand()
+	result := test.RunCmd(cmd, fmt.Sprintf("r %s animals(.==dog)", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	expectedOutput := `dog
+`
+	test.AssertResult(t, expectedOutput, result.Output)
+}
+
 func TestDeleteYamlArrayExpressionCmd(t *testing.T) {
 	content := `- name: fred
 - name: cat
diff --git a/pkg/yqlib/path_parser.go b/pkg/yqlib/path_parser.go
index 90a5f8a1..4e518990 100644
--- a/pkg/yqlib/path_parser.go
+++ b/pkg/yqlib/path_parser.go
@@ -65,6 +65,14 @@ func (p *pathParser) MatchesNextPathElement(nodeContext NodeContext, nodeKey str
 		}
 		log.Debug("done deep recursing, found %v matches", len(navigationStrategy.GetVisitedNodes()))
 		return len(navigationStrategy.GetVisitedNodes()) > 0
+	} else if strings.Contains(headString, "==") && nodeContext.Node.Kind == yaml.ScalarNode {
+		result := strings.SplitN(headString, "==", 2)
+		path := strings.TrimSpace(result[0])
+		value := strings.TrimSpace(result[1])
+		if path == "." {
+			log.Debug("need to match scalar")
+			return matchesString(value, nodeContext.Node.Value)
+		}
 	}
 
 	if head == "+" {