build: reorganise build: abi4, fallback, prebuild cli

- ABI4 by default, fallback to abi 3.
- aa-prebuild cli that can be used by other project shipping profiles.
- --file option to cli to only build one dev profile.
- add abi version filter to only & exclude directives.

pkg/prebuild/prepare/synchronise.go

@@ -6,35 +6,53 @@ package prepare
 
 import (
 	"github.com/roddhjav/apparmor.d/pkg/paths"
-	"github.com/roddhjav/apparmor.d/pkg/prebuild/cfg"
+	"github.com/roddhjav/apparmor.d/pkg/prebuild"
 	"github.com/roddhjav/apparmor.d/pkg/util"
 )
 
 type Synchronise struct {
-	cfg.Base
+	prebuild.Base
+	Path string
 }
 
 func init() {
 	RegisterTask(&Synchronise{
-		Base: cfg.Base{
+		Base: prebuild.Base{
 			Keyword: "synchronise",
 			Msg:     "Initialize a new clean apparmor.d build directory",
 		},
+		Path: "",
 	})
 }
 
 func (p Synchronise) Apply() ([]string, error) {
 	res := []string{}
-	dirs := paths.PathList{cfg.RootApparmord, cfg.Root.Join("root"), cfg.Root.Join("systemd")}
+	dirs := paths.PathList{prebuild.RootApparmord, prebuild.Root.Join("root"), prebuild.Root.Join("systemd")}
 	for _, dir := range dirs {
 		if err := dir.RemoveAll(); err != nil {
 			return res, err
 		}
 	}
-	for _, name := range []string{"apparmor.d", "root"} {
-		if err := util.CopyTo(paths.New(name), cfg.Root.Join(name)); err != nil {
+	if p.Path == "" {
+		for _, name := range []string{"apparmor.d", "root"} {
+			if err := util.CopyTo(paths.New(name), prebuild.Root.Join(name)); err != nil {
+				return res, err
+			}
+		}
+	} else {
+		file := paths.New(p.Path)
+		destination, err := file.RelFrom(paths.New("apparmor.d"))
+		if err != nil {
 			return res, err
 		}
+		destination = prebuild.RootApparmord.JoinPath(destination)
+		if err := destination.Parent().MkdirAll(); err != nil {
+			return res, err
+		}
+		if err := file.CopyTo(destination); err != nil {
+			return res, err
+		}
+		res = append(res, destination.String())
 	}
 	return res, nil
 }