internal/rosa/state: patch output-only packages

This is useful for common patched source code.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/state.go

@@ -1041,12 +1041,6 @@ func (ctx *evalContext) pf(
 	}
 
 	meta.ID = int(anitya)
-	if output != nil {
-		v = cachedArtifact{&meta, output}
-		set = true
-		return
-	}
-
 	for _, pathname := range patches {
 		var p []byte
 		p, err = fs.ReadFile(ctx.b, pathname)
@@ -1059,6 +1053,19 @@ func (ctx *evalContext) pf(
 		})
 	}
 
+	if output != nil {
+		if len(attr.Patches) != 0 || attr.Chmod {
+			rn := string(name)
+			if meta.Version != Unversioned {
+				rn = string(name) + "-" + meta.Version
+			}
+			output = ctx.t.NewPatchedSource(rn, output, !attr.Chmod, attr.Patches...)
+		}
+		v = cachedArtifact{&meta, output}
+		set = true
+		return
+	}
+
 	if overlay == "" {
 		for _, h := range extraH {
 			_, a := ctx.t.MustLoad(h)