Fix subcharts dependencies processing

Signed-off-by: Valentin Flaux <vflaux@oui.sncf>

pkg/chartutil/dependencies.go

@@ -106,6 +106,15 @@ func getAliasDependency(charts []*chart.Chart, dep *chart.Dependency) *chart.Cha
 		md := *c.Metadata
 		out.Metadata = &md
 
+		if md.Dependencies != nil {
+			dependencies := make([]*chart.Dependency, len(md.Dependencies))
+			for i := range md.Dependencies {
+				d := *md.Dependencies[i]
+				dependencies[i] = &d
+			}
+			md.Dependencies = dependencies
+		}
+
 		if dep.Alias != "" {
 			md.Name = dep.Alias
 		}

pkg/chartutil/dependencies_test.go

@@ -312,15 +312,15 @@ func TestDependentChartAliases(t *testing.T) {
 	c := loadChart(t, "testdata/dependent-chart-alias")
 	req := c.Metadata.Dependencies
 
-	if len(c.Dependencies()) != 2 {
-		t.Fatalf("expected 2 dependencies for this chart, but got %d", len(c.Dependencies()))
+	if len(c.Dependencies()) != 3 {
+		t.Fatalf("expected 3 dependencies for this chart, but got %d", len(c.Dependencies()))
 	}
 
 	if err := processDependencyEnabled(c, c.Values, ""); err != nil {
 		t.Fatalf("expected no errors but got %q", err)
 	}
 
-	if len(c.Dependencies()) != 3 {
+	if len(c.Dependencies()) != 5 {
 		t.Fatal("expected alias dependencies to be added")
 	}
 
@@ -328,6 +328,20 @@ func TestDependentChartAliases(t *testing.T) {
 		t.Fatalf("expected number of chart dependencies %d, but got %d", len(c.Metadata.Dependencies), len(c.Dependencies()))
 	}
 
+	for _, dep := range c.Dependencies() {
+		if len(dep.Metadata.Dependencies) == 0 {
+			continue
+		}
+		if len(dep.Dependencies()) != len(dep.Metadata.Dependencies) {
+			t.Fatalf("subchart %s: expected number of dependencies %d, but got %d", dep.Name(), len(dep.Metadata.Dependencies), len(dep.Dependencies()))
+		}
+		for i := range dep.Dependencies() {
+			if dep.Metadata.Dependencies[i].Name != dep.Dependencies()[i].Name() {
+				t.Fatalf("subchart %s: expected name %s, but got %s", dep.Name(), dep.Metadata.Dependencies[i].Name, dep.Dependencies()[i].Name())
+			}
+		}
+	}
+
 	aliasChart := getAliasDependency(c.Dependencies(), req[2])
 
 	if aliasChart == nil {

pkg/chartutil/testdata/dependent-chart-alias/Chart.yaml

@@ -27,3 +27,11 @@ dependencies:
     version: "4.3.2"
     repository: https://example.com/charts
     alias: mariners1
+  - name: gizmo
+    version: "0.1.0"
+    repository: https://example.com/charts
+    alias: gizmo1
+  - name: gizmo
+    version: "0.1.0"
+    repository: https://example.com/charts
+    alias: gizmo2

pkg/chartutil/testdata/dependent-chart-alias/charts/gizmo/Chart.yaml

@@ -0,0 +1,12 @@
+apiVersion: v1
+name: gizmo
+description: Deploy a basic Alpine Linux pod
+version: 0.1.0
+home: https://helm.sh/helm
+dependencies:
+  - name: frobule
+    version: 0.1.0
+    alias: frobozz1
+  - name: frobule
+    version: 0.1.0
+    alias: frobozz2

pkg/chartutil/testdata/dependent-chart-alias/charts/gizmo/charts/frobule/Chart.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+name: frobule
+description: Deploy a basic Alpine Linux pod
+version: 0.1.0
+home: https://helm.sh/helm