Re: [PATCH v2 2/5] Makefile: under "make dist", include the sha1collisiondetection submodule

Ævar Arnfjörð Bjarmason [off-list ref] writes:

I started by trying to come up with something generic which would handle
future submodules, i.e.:

    git submodule foreach 'git ls-files'

I am not all that interested in that.  The hardcoded list I felt
disturbing was not "what are the submodules we want to include?",
but "what are the files from sha1dc submodule we use?".

IOW, I was more wondering about these selective copies:

...
+	@cp sha1collisiondetection/LICENSE.txt \
+		$(GIT_TARNAME)/sha1collisiondetection/
+	@cp sha1collisiondetection/LICENSE.txt \
+		$(GIT_TARNAME)/sha1collisiondetection/
+	@cp sha1collisiondetection/lib/sha1.[ch] \
+		$(GIT_TARNAME)/sha1collisiondetection/lib/
+	@cp sha1collisiondetection/lib/ubc_check.[ch] \
+		$(GIT_TARNAME)/sha1collisiondetection/lib/
...

As we are assuming that DC_SHA1_SUBMODULE users are not doing the
make dist from a tarball extract, wouldn't something along the
lines of

	git -C sha1collisiondetection archive HEAD | \
	$(TAR) Cxf $(GIT_TARNAME)/sha1collisiondetection -

be a better way to go?