fix(helm): process dependencies import-values

When running helm lint, import-values for dependencies are ignored,
also added test for linting chart with import-values

Closes #9658

Signed-off-by: Stuart Drennan <stuart.drennan@gmail.com>

pkg/lint/lint_test.go

@@ -35,6 +35,7 @@ const badChartDir = "rules/testdata/badchartfile"
 const badValuesFileDir = "rules/testdata/badvaluesfile"
 const badYamlFileDir = "rules/testdata/albatross"
 const goodChartDir = "rules/testdata/goodone"
+const subChartValuesDir = "rules/testdata/withsubchart"
 
 func TestBadChart(t *testing.T) {
 	m := All(badChartDir, values, namespace, strict).Messages
@@ -144,3 +145,15 @@ func TestHelmCreateChart(t *testing.T) {
 		t.Errorf("Unexpected lint error: %s", msg)
 	}
 }
+
+// lint ignores import-values
+// See https://github.com/helm/helm/issues/9658
+func TestSubChartValuesChart(t *testing.T) {
+	m := All(subChartValuesDir, values, namespace, strict).Messages
+	if len(m) != 0 {
+		t.Error("All returned linter messages when it shouldn't have")
+		for i, msg := range m {
+			t.Logf("Message %d: %s", i, msg)
+		}
+	}
+}

pkg/lint/rules/template.go

@@ -70,6 +70,12 @@ func Templates(linter *support.Linter, values map[string]interface{}, namespace
 		Namespace: namespace,
 	}
 
+	// lint ignores import-values
+	// See https://github.com/helm/helm/issues/9658
+	if err := chartutil.ProcessDependencies(chart, values); err != nil {
+		return
+	}
+
 	cvals, err := chartutil.CoalesceValues(chart, values)
 	if err != nil {
 		return

pkg/lint/rules/testdata/withsubchart/Chart.yaml

@@ -0,0 +1,16 @@
+apiVersion: v2
+name: withsubchart
+description: A Helm chart for Kubernetes
+type: application
+version: 0.1.0
+appVersion: "1.16.0"
+icon: http://riverrun.io
+
+dependencies:
+  - name: subchart
+    version: 0.1.16
+    repository: "file://../subchart"
+    import-values:
+      - child: subchart
+        parent: subchart
+

pkg/lint/rules/testdata/withsubchart/charts/subchart/Chart.yaml

@@ -0,0 +1,6 @@
+apiVersion: v2
+name: subchart
+description: A Helm chart for Kubernetes
+type: application
+version: 0.1.0
+appVersion: "1.16.0"

pkg/lint/rules/testdata/withsubchart/charts/subchart/templates/subchart.yaml

@@ -0,0 +1,2 @@
+metadata:
+  name: {{ .Values.subchart.name | lower }}

pkg/lint/rules/testdata/withsubchart/charts/subchart/values.yaml

@@ -0,0 +1,2 @@
+subchart:
+  name: subchart

pkg/lint/rules/testdata/withsubchart/templates/mainchart.yaml

@@ -0,0 +1,2 @@
+metadata:
+  name: {{ .Values.subchart.name | lower }}