Added omitempty to Requirements struct

This was needed to get correct sha for requirements.yaml and requirements.lock
Fixes https://github.com/kubernetes/helm/issues/2598

pkg/chartutil/requirements.go

@@ -57,16 +57,16 @@ type Dependency struct {
 	// used to fetch the repository index.
 	Repository string `json:"repository"`
 	// A yaml path that resolves to a boolean, used for enabling/disabling charts (e.g. subchart1.enabled )
-	Condition string `json:"condition"`
+	Condition string `json:"condition,omitempty"`
 	// Tags can be used to group charts for enabling/disabling together
-	Tags []string `json:"tags"`
+	Tags []string `json:"tags,omitempty"`
 	// Enabled bool determines if chart should be loaded
-	Enabled bool `json:"enabled"`
+	Enabled bool `json:"enabled,omitempty"`
 	// ImportValues holds the mapping of source values to parent key to be imported. Each item can be a
 	// string or pair of child/parent sublist items.
-	ImportValues []interface{} `json:"import-values"`
+	ImportValues []interface{} `json:"import-values,omitempty"`
 	// Alias usable alias to be used for the chart
-	Alias string `json:"alias"`
+	Alias string `json:"alias,omitempty"`
 }
 
 // ErrNoRequirementsFile to detect error condition

pkg/resolver/resolver_test.go

@@ -146,7 +146,7 @@ func TestResolve(t *testing.T) {
 }
 
 func TestHashReq(t *testing.T) {
-	expect := "sha256:45b06fcc4496c705bf3d634f8a2ff84e6a6f0bdcaf010614b8886572d1e52b99"
+	expect := "sha256:e70e41f8922e19558a8bf62f591a8b70c8e4622e3c03e5415f09aba881f13885"
 	req := &chartutil.Requirements{
 		Dependencies: []*chartutil.Dependency{
 			{Name: "alpine", Version: "0.1.0", Repository: "http://localhost:8879/charts"},