Added validation to ensure that a specific environment is selected wh…

…en using local apply

cmd/apply.go

@@ -27,6 +27,10 @@ func init() {
 				log.Fatal().Err(err).Msg("Unable to initialize myks's globe")
 			}
 
+			if !g.SingleEnv() {
+				log.Fatal().Msg("Local apply can only be used with a specific environment. Make sure you are connected to the right cluster.")
+			}
+
 			if err := g.Apply(asyncLevel); err != nil {
 				log.Fatal().Err(err).Msg("Unable to apply k8s manifests")
 			}

internal/myks/globe.go

@@ -400,3 +400,11 @@ func (g *Globe) Msg(msg string) string {
 	formattedMessage := fmt.Sprintf(GlobalLogFormat, msg)
 	return formattedMessage
 }
+
+func (g *Globe) SingleEnv() bool {
+	if g.environments == nil {
+		log.Error().Msg("Invoking SingleEnv() before Init()")
+		return false
+	}
+	return len(g.environments) == 1
+}

internal/myks/globe_test.go

@@ -0,0 +1,28 @@
+package myks
+
+import "testing"
+
+func TestGlobe_SingleEnv(t *testing.T) {
+	type fields struct {
+		environments map[string]*Environment
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   bool
+	}{
+		{"before init", fields{map[string]*Environment{}}, false},
+		{"happy path", fields{map[string]*Environment{"test-env": {}}}, true},
+		{"sad path", fields{map[string]*Environment{"test-env": {}, "test-env2": {}}}, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			g := &Globe{
+				environments: tt.fields.environments,
+			}
+			if got := g.SingleEnv(); got != tt.want {
+				t.Errorf("SingleEnv() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}