fix(pkg/chartutil): conditions for alias and umrella charts (#3734)

Enable to use charts with dependencies that have conditions (e.g. in
umbrella charts). Allow aliases for dependencies that have dependencies
with conditions.

Closes #3734

Signed-off-by: Christian Koeberl <christian.koeberl@gmail.com>

pkg/chartutil/dependencies.go

@@ -24,14 +24,14 @@ import (
 )
 
 func ProcessDependencies(c *chart.Chart, v Values) error {
-	if err := processDependencyEnabled(c, v); err != nil {
+	if err := processDependencyEnabled(c, v, ""); err != nil {
 		return err
 	}
 	return processDependencyImportValues(c)
 }
 
 // processDependencyConditions disables charts based on condition path value in values
-func processDependencyConditions(reqs []*chart.Dependency, cvals Values) {
+func processDependencyConditions(reqs []*chart.Dependency, cvals Values, cpath string) {
 	if reqs == nil {
 		return
 	}
@@ -40,7 +40,7 @@ func processDependencyConditions(reqs []*chart.Dependency, cvals Values) {
 		for _, c := range strings.Split(strings.TrimSpace(r.Condition), ",") {
 			if len(c) > 0 {
 				// retrieve value
-				vv, err := cvals.PathValue(c)
+				vv, err := cvals.PathValue(cpath + c)
 				if err == nil {
 					// if not bool, warn
 					if bv, ok := vv.(bool); ok {
@@ -129,7 +129,7 @@ func getAliasDependency(charts []*chart.Chart, dep *chart.Dependency) *chart.Cha
 }
 
 // processDependencyEnabled removes disabled charts from dependencies
-func processDependencyEnabled(c *chart.Chart, v map[string]interface{}) error {
+func processDependencyEnabled(c *chart.Chart, v map[string]interface{}, path string) error {
 	if c.Metadata.Dependencies == nil {
 		return nil
 	}
@@ -170,7 +170,7 @@ Loop:
 	}
 	// flag dependencies as enabled/disabled
 	processDependencyTags(c.Metadata.Dependencies, cvals)
-	processDependencyConditions(c.Metadata.Dependencies, cvals)
+	processDependencyConditions(c.Metadata.Dependencies, cvals, path)
 	// make a map of charts to remove
 	rm := map[string]struct{}{}
 	for _, r := range c.Metadata.Dependencies {
@@ -190,7 +190,8 @@ Loop:
 
 	// recursively call self to process sub dependencies
 	for _, t := range cd {
-		if err := processDependencyEnabled(t, cvals); err != nil {
+		subpath := path + t.Metadata.Name + "."
+		if err := processDependencyEnabled(t, cvals, subpath); err != nil {
 			return err
 		}
 	}

pkg/chartutil/dependencies_test.go

@@ -99,18 +99,22 @@ func TestDependencyEnabled(t *testing.T) {
 		[]string{"parentchart", "parentchart.subchart1", "parentchart.subchart1.subchartb"},
 	}, {
 		"tags enabling a parent/child group with condition disabling one child",
-		M{"subchartc": M{"enabled": false}, "tags": M{"back-end": true}},
+		M{"subchart2": M{"subchartc": M{"enabled": false}}, "tags": M{"back-end": true}},
 		[]string{"parentchart", "parentchart.subchart1", "parentchart.subchart1.subcharta", "parentchart.subchart1.subchartb", "parentchart.subchart2", "parentchart.subchart2.subchartb"},
 	}, {
 		"tags will not enable a child if parent is explicitly disabled with condition",
 		M{"subchart1": M{"enabled": false}, "tags": M{"front-end": true}},
 		[]string{"parentchart"},
+	}, {
+		"subcharts with alias also respect conditions",
+		M{"subchart1": M{"enabled": false}, "subchart2alias": M{"enabled": true, "subchartb": M{"enabled": true}}},
+		[]string{"parentchart", "parentchart.subchart2alias", "parentchart.subchart2alias.subchartb"},
 	}}
 
 	for _, tc := range tests {
 		c := loadChart(t, "testdata/subpop")
 		t.Run(tc.name, func(t *testing.T) {
-			if err := processDependencyEnabled(c, tc.v); err != nil {
+			if err := processDependencyEnabled(c, tc.v, ""); err != nil {
 				t.Fatalf("error processing enabled dependencies %v", err)
 			}
 
@@ -279,7 +283,7 @@ func TestDependentChartAliases(t *testing.T) {
 		t.Fatalf("expected 2 dependencies for this chart, but got %d", len(c.Dependencies()))
 	}
 
-	if err := processDependencyEnabled(c, c.Values); err != nil {
+	if err := processDependencyEnabled(c, c.Values, ""); err != nil {
 		t.Fatalf("expected no errors but got %q", err)
 	}
 
@@ -300,7 +304,7 @@ func TestDependentChartWithSubChartsAbsentInDependency(t *testing.T) {
 		t.Fatalf("expected 2 dependencies for this chart, but got %d", len(c.Dependencies()))
 	}
 
-	if err := processDependencyEnabled(c, c.Values); err != nil {
+	if err := processDependencyEnabled(c, c.Values, ""); err != nil {
 		t.Fatalf("expected no errors but got %q", err)
 	}
 
@@ -332,7 +336,7 @@ func TestDependentChartsWithSubchartsAllSpecifiedInDependency(t *testing.T) {
 		t.Fatalf("expected 2 dependencies for this chart, but got %d", len(c.Dependencies()))
 	}
 
-	if err := processDependencyEnabled(c, c.Values); err != nil {
+	if err := processDependencyEnabled(c, c.Values, ""); err != nil {
 		t.Fatalf("expected no errors but got %q", err)
 	}
 
@@ -352,7 +356,7 @@ func TestDependentChartsWithSomeSubchartsSpecifiedInDependency(t *testing.T) {
 		t.Fatalf("expected 2 dependencies for this chart, but got %d", len(c.Dependencies()))
 	}
 
-	if err := processDependencyEnabled(c, c.Values); err != nil {
+	if err := processDependencyEnabled(c, c.Values, ""); err != nil {
 		t.Fatalf("expected no errors but got %q", err)
 	}
 

pkg/chartutil/testdata/subpop/Chart.yaml

@@ -33,3 +33,9 @@ dependencies:
     tags:
       - back-end
       - subchart2
+
+  - name: subchart2
+    alias: subchart2alias
+    repository: http://localhost:10191
+    version: 0.1.0
+    condition: subchart2alias.enabled

pkg/chartutil/testdata/subpop/charts/subchart1/Chart.yaml

@@ -6,7 +6,7 @@ dependencies:
   - name: subcharta
     repository: http://localhost:10191
     version: 0.1.0
-    condition: subcharta.enabled,subchart1.subcharta.enabled
+    condition: subcharta.enabled
     tags:
       - front-end
       - subcharta

pkg/chartutil/testdata/subpop/charts/subchart2/Chart.yaml

@@ -6,7 +6,7 @@ dependencies:
   - name: subchartb
     repository: http://localhost:10191
     version: 0.1.0
-    condition: subchartb.enabled,subchart2.subchartb.enabled
+    condition: subchartb.enabled
     tags:
       - back-end
       - subchartb

pkg/chartutil/testdata/subpop/values.yaml

@@ -38,3 +38,6 @@ overridden-chartA-B:
 tags:
   front-end: true
   back-end: false
+
+subchart2alias:
+  enabled: false