The appended file 'version' has the same timestamp as the files added
by `git archive`.
The original file name and time stamp are no longer saved to the
gzip header in resulting $(PACKAGE)-$(VERSION).tar.gz file.
When build environment is close enough to another, this may
provide mutually reproducible release archive files.
fi ; \
git archive --format=tar --prefix=$(PACKAGE)-$(VERSION)/ $$ref > $(TAR_FILE).tmp
echo $(VERSION) > version.tmp
+ ct=`git --no-pager log -1 --pretty=format:%ct $$ref` ; \
tar --owner root --group root --append -f $(TAR_FILE).tmp \
--transform s_^_$(PACKAGE)-$(VERSION)/_ \
- --transform 's_.tmp$$__' version.tmp
+ --transform 's_.tmp$$__' --mtime=@$$ct version.tmp
rm version.tmp
- gzip < $(TAR_FILE).tmp > $(TAR_FILE)
+ gzip -n < $(TAR_FILE).tmp > $(TAR_FILE)
@echo "Source is ready for release in $(TAR_FILE)"
$(SHA256_FILE): $(TAR_FILE)