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

pkg/prebuild/builder/complain.go

@@ -0,0 +1,48 @@
+// 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 (
+	"regexp"
+	"slices"
+	"strings"
+
+	"github.com/roddhjav/apparmor.d/pkg/prebuild/cfg"
+)
+
+var (
+	regFlags         = regexp.MustCompile(`flags=\(([^)]+)\)`)
+	regProfileHeader = regexp.MustCompile(` {`)
+)
+
+type Complain struct {
+	cfg.Base
+}
+
+func init() {
+	RegisterBuilder(&Complain{
+		Base: cfg.Base{
+			Keyword: "complain",
+			Msg:     "Set complain flag on all profiles",
+		},
+	})
+}
+
+func (b Complain) Apply(profile string) string {
+	flags := []string{}
+	matches := regFlags.FindStringSubmatch(profile)
+	if len(matches) != 0 {
+		flags = strings.Split(matches[1], ",")
+		if slices.Contains(flags, "complain") {
+			return profile
+		}
+	}
+	flags = append(flags, "complain")
+	strFlags := " flags=(" + strings.Join(flags, ",") + ") {"
+
+	// Remove all flags definition, then set manifest' flags
+	profile = regFlags.ReplaceAllLiteralString(profile, "")
+	return regProfileHeader.ReplaceAllLiteralString(profile, strFlags)
+}