+tasks/download_%:
+ if [ -z "$(url_$*)" ]; then echo "No url for $*" >&2; false; fi
+ mkdir -p download
+ cd download && wget --passive-ftp -N $(url_$*)
+ touch $@
+
+tasks/extract_%: tasks/download_%
+ mkdir -p build
+ cd build && \
+ gzip -dc ../download/$*-$(version_$*).tar.gz | $(TAR) -xf - && \
+ rm -f $* && \
+ ln -s $*-$(version_$*) $*
+ touch $@
+
+tasks/extract_darcs_%:
+ mkdir -p build
+ if [ -z "$(darcs_$*)" ]; then echo "No darcs url for $*" >&2; false; fi
+ if [ -d "$(root)/_darcs" ]; then \
+ cd build && darcs get --repo-name="$*" --verbose "$(darcs_$*)"; \
+ else \
+ mkdir -p "build/$*" && cd "build/$*"; \
+ wget -nH -rl 16 -N -X _darcs $(darcs_$*); \
+ fi
+ touch $@
+
+update_darcs_%: tasks/extract_darcs_%
+ if [ -d "build/$*/_darcs" ]; then \
+ cd "build/$*" && darcs pull; \
+ else \
+ cd "build/$*" && wget -np -nH --cut-dirs=1 -rl 16 -N -X _darcs $(darcs_$*); \
+ fi
+ rm "tasks/build_darcs_$*" # to force a rebuild
+
+tasks/build_darcs_%: tasks/extract_darcs_%
+ cd "build/$*" && $(MAKE)
+ touch $@
+