wip static xxhash

scripts/Makefile.static

@@ -7,11 +7,20 @@ GZ = $(patsubst %,%.gz,$(SRCS))
 .PHONY: all
 all: $(ZSTD) $(BR) $(GZ)
 
-%.br: %
+.SECONDARY:
-	brotli $<
 
-%.zst: %
+%.br: %.xxhash
-	zstd -19 $<
+	brotli -f $*
 
-%.gz: %
+%.zst: %.xxhash
-	zopfli $<
+	zstd -f -19 $*
+
+%.gz: %.xxhash
+	zopfli $*
+
+# https://github.com/gohugoio/hugo/issues/10842
+%.xxhash: %
+	current=$$(xxhsum $< | cut -d' ' -f1); \
+	if [ ! -f $< ] || [ "$$(cat $@ 2>/dev/null)" != "$$current" ]; then \
+		echo "$$current" > $@; \
+	fi