chore(label): new label "values-from"

This labels allow to use some environment variables from another service
and use the configMap / secret instead of the original value. This is
useful to avoid duplication of values for several variables.

generator/generator.go

@@ -113,6 +113,10 @@ func Generate(project *types.Project) (*HelmChart, error) {
 			}
 		}
 	}
+	// it's now time to get "value-from", before makeing the secrets and configmaps!
+	for _, s := range project.Services {
+		chart.setEnvironmentValuesFrom(s, deployments)
+	}
 
 	// generate configmaps with environment variables
 	chart.generateConfigMapsAndSecrets(project)
@@ -123,6 +127,16 @@ func Generate(project *types.Project) (*HelmChart, error) {
 		chart.setSharedConf(s, deployments)
 	}
 
+	// remove all "boundEnv" from the values
+	for _, d := range deployments {
+		if len(d.boundEnvVar) == 0 {
+			continue
+		}
+		for _, e := range d.boundEnvVar {
+			delete(chart.Values[d.service.Name].(*Value).Environment, e)
+		}
+	}
+
 	// generate yaml files
 	for _, d := range deployments {
 		y, err := d.Yaml()