upstream_archive = readline-$(OPK_SOURCE_VERSION_UPSTREAM).tar.gz
upstream_url = http://ftp.gnu.org/pub/gnu/readline/$(upstream_archive)
source_archive = ../readline-$(OPK_SOURCE_VERSION_UPSTREAM).orig.tar.gz

$(source_archive):
	wget -c '$(upstream_url)'
	set -e; if gpg --version >/dev/null 2>&1; then \
		wget -c '$(upstream_url).sig'; \
		if [ ! -e ../keyring.gpg ]; then \
			wget -c -O chet.asc \
				http://cnswww.cns.cwru.edu/~chet/gpgkey.asc; \
			gpg --keyring ../keyring.gpg --no-default-keyring \
				--import chet.asc; \
			rm -f ../keyring.gpg~; \
		fi; \
		gpg --verify --keyring ../keyring.gpg \
			'$(upstream_archive).sig'; \
	fi
	mv '$(upstream_archive)' '$(source_archive)'

source: $(source_archive)