build: remove directive text not applied on build.

pkg/prebuild/directive/core.go

@@ -61,6 +61,13 @@ func NewOption(file *paths.Path, match []string) *Option {
 	}
 }
 
+// Clean the selected directive from profile.
+// Useful to remove directive text applied on some condition only
+func (o *Option) Clean(profile string) string {
+	reg := regexp.MustCompile(`\s*` + Keyword + o.Name + ` .*$`)
+	return reg.ReplaceAllString(profile, "")
+}
+
 func RegisterDirective(d Directive) {
 	Directives[d.Name()] = d
 }

pkg/prebuild/directive/filter.go

@@ -43,10 +43,10 @@ func filterRuleForUs(opt *Option) bool {
 
 func filter(only bool, opt *Option, profile string) string {
 	if only && filterRuleForUs(opt) {
-		return profile
+		return opt.Clean(profile)
 	}
 	if !only && !filterRuleForUs(opt) {
-		return profile
+		return opt.Clean(profile)
 	}
 
 	inline := true

pkg/prebuild/directive/filter_test.go

@@ -31,7 +31,7 @@ func TestFilterOnly_Apply(t *testing.T) {
 				Raw:     "  @{bin}/arch-audit rPx, #aa:only apt",
 			},
 			profile: "  @{bin}/arch-audit rPx, #aa:only apt",
-			want:    "  @{bin}/arch-audit rPx, #aa:only apt",
+			want:    "  @{bin}/arch-audit rPx,",
 		},
 		{
 			name:   "paragraph",
@@ -121,7 +121,7 @@ func TestFilterExclude_Apply(t *testing.T) {
 				Raw:     "  @{bin}/dpkg rPx -> child-dpkg, #aa:exclude debian",
 			},
 			profile: "  @{bin}/dpkg rPx -> child-dpkg, #aa:exclude debian",
-			want:    "  @{bin}/dpkg rPx -> child-dpkg, #aa:exclude debian",
+			want:    "  @{bin}/dpkg rPx -> child-dpkg,",
 		},
 	}
 	for _, tt := range tests {