build: add support for building multiple version of the package.

Justfile

@@ -63,27 +63,27 @@ build:
 [group('build')]
 [doc('Prebuild the profiles in enforced mode')]
 enforce: build
-	@./{{build}}/prebuild
+	@./{{build}}/prebuild --buildir {{build}}
 
 [group('build')]
 [doc('Prebuild the profiles in complain mode')]
 complain: build
-	@./{{build}}/prebuild --complain
+	./{{build}}/prebuild --buildir {{build}} --complain
 
 [group('build')]
 [doc('Prebuild the profiles in FSP mode')]
 fsp: build
-	@./{{build}}/prebuild --full
+	@./{{build}}/prebuild --buildir {{build}} --full
 
 [group('build')]
 [doc('Prebuild the profiles in FSP mode (complain)')]
 fsp-complain: build
-	@./{{build}}/prebuild --complain --full
+	@./{{build}}/prebuild --buildir {{build}} --complain --full
 
 [group('build')]
 [doc('Prebuild the profiles in FSP mode (debug)')]
 fsp-debug: build
-	@./{{build}}/prebuild --complain --full --debug
+	@./{{build}}/prebuild --buildir {{build}} --complain --full --debug
 
 [group('install')]
 [doc('Install prebuild profiles')]

pkg/prebuild/cli/cli.go

@@ -32,7 +32,9 @@ Options:
     -a, --abi ABI     Target apparmor ABI.
     -v, --version V   Target apparmor version.
     -f, --full        Set AppArmor for full system policy.
+	-b, --buildir DIR Root build directory.
     -F, --file        Only prebuild a given file.
+        --debug       Enable debug mode.
 `
 )
 
@@ -41,9 +43,11 @@ var (
 	complain bool
 	enforce  bool
 	full     bool
+	debug    bool
 	abi      int
 	version  float64
 	file     string
+	buildir  string
 )
 
 func init() {
@@ -61,6 +65,9 @@ func init() {
 	flag.Float64Var(&version, "version", nilVer, "Target apparmor version.")
 	flag.StringVar(&file, "F", "", "Only prebuild a given file.")
 	flag.StringVar(&file, "file", "", "Only prebuild a given file.")
+	flag.StringVar(&buildir, "b", "", "Root build directory.")
+	flag.StringVar(&buildir, "buildir", "", "Root build directory.")
+	flag.BoolVar(&debug, "debug", false, "Enable debug mode.")
 }
 
 func Configure() {
@@ -87,6 +94,9 @@ func Configure() {
 
 	if complain {
 		builder.Register("complain")
+		if debug {
+			builder.Register("debug")
+		}
 	} else if enforce {
 		builder.Register("enforce")
 	}
@@ -106,6 +116,10 @@ func Configure() {
 	if version != nilVer {
 		prebuild.Version = version
 	}
+	if buildir != "" {
+		prebuild.Root = paths.New(buildir)
+		prebuild.RootApparmord = prebuild.Root.Join("apparmor.d")
+	}
 	if file != "" {
 		sync, _ := prepare.Tasks["synchronise"].(*prepare.Synchronise)
 		sync.Paths = []string{file}