Config: Create common functions to create archives

The compression code is very messy because it has changed so many times.
This cleans this up and creates common functions that can be used for
the ISO images as well as packages.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

lfs/cdrom

@@ -144,25 +144,18 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	# Create a directory to authorise the CDROM in
 	rm -rf $(DIR_TMP)/cdrom && mkdir -p $(DIR_TMP)/cdrom
 
-	# Clear mtab (prevents .journal problems)
-	rm -vf /etc/mtab
-	ln -s /proc/self/mounts /etc/mtab
-
-	# Create filelist for packaging.
-	BUILDTARGET="$(BUILDTARGET)" BUILD_ARCH="$(BUILD_ARCH)" KVER="$(KVER)" \
-		$(DIR_SRC)/src/scripts/archive.files \
-		$(DIR_SRC)/config/rootfiles/common \
-		> $(DIR_TMP)/ROOTFILES
-
-	# Compress root filesystem
-	# Reason for this tar+untar+tar is removing of entries listed two or more in src/ROOTFILES
+	# Create the target directory
 	rm -rf $(DIR_TMP)/root && mkdir -p $(DIR_TMP)/root
-	tar $(TAR_OPTIONS) -c --exclude='#*' --exclude='proc/*' --exclude='dev/pts/*' --exclude='tmp/*' \
-		--exclude='__pycache__' \
-		-C / --files-from=$(DIR_TMP)/ROOTFILES | tar $(TAR_OPTIONS) -x -C $(DIR_TMP)/root
-	rm -f $(DIR_TMP)/ROOTFILES
+
+	# Copy all files that we want
+	$(call COPY_FILES,$(DIR_SRC)/config/rootfiles/common,$(DIR_TMP)/root)
+
 	mkdir $(DIR_TMP)/root/sys
-	cd $(DIR_TMP)/root && tar $(TAR_OPTIONS) -cf - * | zstd $(ZSTD_OPTIONS) > $(DIR_TMP)/cdrom/distro.img
+
+	# Create the archive
+	$(call COMPRESS_ZSTD,$(DIR_TMP)/root,$(DIR_TMP)/cdrom/distro.img)
+
+	# Remove the raw files
 	rm -rf $(DIR_TMP)/root
 
 	# Other files