fix(helm):Fix dependency aliaes not working

The alias functionality only works when a hardcoded version
is used. Any use of semver logic causes unexpected behavior.
I use version.IsCompatibleRange to check the dependency version.

Closes #2794

(cherry picked from commit 0440b54)

pkg/chartutil/requirements.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/ghodss/yaml"
 	"k8s.io/helm/pkg/proto/hapi/chart"
+	"k8s.io/helm/pkg/version"
 )
 
 const (
@@ -230,7 +231,7 @@ func getAliasDependency(charts []*chart.Chart, aliasChart *Dependency) *chart.Ch
 		if existingChart.Metadata.Name != aliasChart.Name {
 			continue
 		}
-		if existingChart.Metadata.Version != aliasChart.Version {
+		if !version.IsCompatibleRange(aliasChart.Version, existingChart.Metadata.Version) {
 			continue
 		}
 		chartFound = *existingChart
@@ -266,7 +267,7 @@ func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
 	for _, existingDependency := range c.Dependencies {
 		var dependencyFound bool
 		for _, req := range reqs.Dependencies {
-			if existingDependency.Metadata.Name == req.Name && existingDependency.Metadata.Version == req.Version {
+			if existingDependency.Metadata.Name == req.Name && version.IsCompatibleRange(req.Version, existingDependency.Metadata.Version) {
 				dependencyFound = true
 				break
 			}

pkg/chartutil/requirements_test.go

@@ -21,6 +21,7 @@ import (
 	"strconv"
 
 	"k8s.io/helm/pkg/proto/hapi/chart"
+	"k8s.io/helm/pkg/version"
 )
 
 func TestLoadRequirements(t *testing.T) {
@@ -347,11 +348,24 @@ func TestGetAliasDependency(t *testing.T) {
 		t.Fatalf("Dependency chart name should be %s but got %s", req.Dependencies[0].Name, aliasChart.Metadata.Name)
 	}
 
+	if req.Dependencies[0].Version != "" {
+		if !version.IsCompatibleRange(req.Dependencies[0].Version, aliasChart.Metadata.Version) {
+			t.Fatalf("Dependency chart version is not in the compatible range")
+		}
+
+	}
+
 	// Failure case
 	req.Dependencies[0].Name = "something-else"
 	if aliasChart := getAliasDependency(c.Dependencies, req.Dependencies[0]); aliasChart != nil {
 		t.Fatalf("expected no chart but got %s", aliasChart.Metadata.Name)
 	}
+
+	req.Dependencies[0].Version = "something else which is not in the compatible range"
+	if version.IsCompatibleRange(req.Dependencies[0].Version, aliasChart.Metadata.Version) {
+		t.Fatalf("Dependency chart version which is not in the compatible range should cause a failure other than a success ")
+	}
+
 }
 
 func TestDependentChartAliases(t *testing.T) {