Install only listed firmware files

The current make-install procedure leaves lots of garbage files that
aren't really firmware files in /lib/firmware.

Instead of copy-all-and-prune approach, copy only the listed files and
links in WHENCE by make-install for assuring only the proper firmware
files.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

Makefile

@@ -10,7 +10,4 @@ check:
 
 install:
 	mkdir -p $(DESTDIR)$(FIRMWAREDIR)
-	cp -r * $(DESTDIR)$(FIRMWAREDIR)
-	rm -rf $(DESTDIR)$(FIRMWAREDIR)/usbdux
-	find $(DESTDIR)$(FIRMWAREDIR) \( -name 'WHENCE' -or -name 'LICENSE.*' -or \
-		-name 'LICENCE.*' \) -exec rm -- {} \;
+	./copy-firmware.sh $(DESTDIR)$(FIRMWAREDIR)

copy-firmware.sh

+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copy firmware files based on WHENCE list
+#
+
+verbose=:
+if [ x"$1" = x"-v" ]; then
+    verbose=echo
+    shift
+fi
+
+destdir="$1"
+
+grep '^File:' WHENCE | sed -e's/^File: *//g' -e's/"//g' | while read f; do
+    test -f "$f" || continue
+    $verbose "copying file $f"
+    mkdir -p $destdir/$(dirname "$f")
+    cp -d "$f" $destdir/"$f"
+done
+
+grep -E '^Link:' WHENCE | sed -e's/^Link: *//g' -e's/-> //g' | while read f d; do
+    test -L "$f" || continue
+    test -f "$destdir/$f" && continue
+    $verbose "copying link $f"
+    mkdir -p $destdir/$(dirname "$f")
+    cp -d "$f" $destdir/"$f"
+done
+
+exit 0