refractor(build): move builder tasks to the builder sub package. Add tests.

pkg/prebuild/builder/abi.go

@@ -0,0 +1,35 @@
+// apparmor.d - Full set of apparmor profiles
+// Copyright (C) 2021-2024 Alexandre Pujol <alexandre@pujol.io>
+// SPDX-License-Identifier: GPL-2.0-only
+
+package builder
+
+import (
+	"github.com/roddhjav/apparmor.d/pkg/prebuild/cfg"
+	"github.com/roddhjav/apparmor.d/pkg/util"
+)
+
+var (
+	regAbi4To3 = util.ToRegexRepl([]string{ // Currently Abi3 -> Abi4
+		`abi/3.0`, `abi/4.0`,
+		`# userns,`, `userns,`,
+		`# mqueue`, `mqueue`,
+	})
+)
+
+type ABI3 struct {
+	cfg.Base
+}
+
+func init() {
+	RegisterBuilder(&ABI3{
+		Base: cfg.Base{
+			Keyword: "abi3",
+			Msg:     "Convert all profiles from abi 4.0 to abi 3.0",
+		},
+	})
+}
+
+func (b ABI3) Apply(profile string) string {
+	return regAbi4To3.Replace(profile)
+}