chore: Cleanup code

constant/features/cmfa.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "cmfa")
-}
+const CMFA = true

constant/features/cmfa_stub.go

@@ -0,0 +1,5 @@
+//go:build !cmfa
+
+package features
+
+const CMFA = false

constant/features/low_memory.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "with_low_memory")
-}
+const WithLowMemory = true

constant/features/low_memory_stub.go

@@ -0,0 +1,5 @@
+//go:build !with_low_memory
+
+package features
+
+const WithLowMemory = false

constant/features/no_fake_tcp.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "no_fake_tcp")
-}
+const NoFakeTCP = true

constant/features/no_fake_tcp_stub.go

@@ -0,0 +1,5 @@
+//go:build !no_fake_tcp
+
+package features
+
+const NoFakeTCP = false

constant/features/tags.go

@@ -1,11 +1,17 @@
 package features
 
-import(
-	"golang.org/x/exp/slices"
-)
-
-var TAGS = make([]string, 0, 0)
-
-func Contains(feat string) (bool) {
-	return slices.Contains(TAGS, feat)
-}
+func Tags() (tags []string) {
+	if CMFA {
+		tags = append(tags, "cmfa")
+	}
+	if WithLowMemory {
+		tags = append(tags, "with_low_memory")
+	}
+	if NoFakeTCP {
+		tags = append(tags, "no_fake_tcp")
+	}
+	if WithGVisor {
+		tags = append(tags, "with_gvisor")
+	}
+	return
+}

constant/features/with_gvisor.go

@@ -2,6 +2,4 @@
 
 package features
 
-func init() {
-	TAGS = append(TAGS, "with_gvisor")
-}
+const WithGVisor = true

constant/features/with_gvisor_stub.go

@@ -0,0 +1,5 @@
+//go:build !with_gvisor
+
+package features
+
+const WithGVisor = false