# -*- makefile -*-

# Usage:
#     @$(buildout_opt) <cfg-file> [set|add|append|remove] <section> <variable> [<value>]
#
# Change setting for <variable> in <section>. Actions are
#
#    set       Set <variable> to <value> replacing any existing value
#    add       If <variable> is unset, set to <value>
#    append    Append <value> to the end of the current value of <variable>
#    remove    Remove any assignment to <variable>
#
define buildout_opt
    _buildout_getopt_() {									\
        sed -n -e "/^\[$$1\]/,/^\[/ba" -eb -e:a -e "/^$$2 *=/,/^\([^ \t]\|\$$\)/p" $$cfgfile |	\
            sed -e '$$d';									\
    };												\
    _buildout_haveopt() {									\
	[ -n "`_buildout_getopt_ "$$1" "$$2"`" ];						\
    };												\
    _buildout_getopt() {									\
	_buildout_checkopt_ "$$1" "$$2" | -e '1s/[^=]* *= *//';					\
    };												\
    _buildout_addopt() {									\
	sed -i -e "/\[$$1\]/ba" -eb -e:a -ea\\ -e "$$2 = $$3" $$cfgfile;			\
    };												\
    _buildout_replaceopt() {									\
	sed -i -e "/^\[$$1\]/,/^\[/ba" -eb -e:a							\
            -e "/^$$2 *=/,/^\([^ \t]\|\$$\)/bb" -eb -e:b					\
            -e "/^$$2 *=/bc" -ebd -e:c								\
            -ec\\ -e "$$2 = $$3" -eb -e:d							\
	    -e "/^\([^ \t]\|\$$\)/b" -ed							\
		$$cfgfile;									\
    };												\
    _buildout_appendopt() {									\
	sed -i -e "/^\[$$1\]/,/^\[/ba" -eb -e:a							\
            -e "/^$$2 *=/,/^\([^ \t]\|\$$\)/bb" -eb -e:b					\
	    -e /^\([^ \t]\|$$\)/bc -eb -e:c							\
            -ei\\ -e "    $$3"									\
		$$cfgfile;									\
    };												\
    _buildout_removeopt() {									\
	sed -i -e "/^\[$$1\]/,/^\[/ba" -eb -e:a							\
            -e "/^$$2 *=/,/^\([^ \t]\|\$$\)/bb" -eb -e:b					\
	    -e "/^\([^ \t]\|\$$\)/b" -ed							\
		$$cfgfile;									\
    };												\
    _buildout_opt_set() {									\
	if _buildout_haveopt "$$1" "$$2"; then							\
	    _buildout_replaceopt "$$1" "$$2" "$$3";						\
	else											\
	    _buildout_addopt "$$1" "$$2" "$$3";							\
	fi;											\
    };												\
    _buildout_opt_add() {									\
	if ! _buildout_haveopt "$$1" "$$2"; then						\
	    _buildout_addopt "$$1" "$$2" "$$3";							\
	fi;											\
    };												\
    _buildout_opt_append() {									\
	if builout_haveopt "$$1" "$$2"; then							\
	    _buildout_appendopt "$$1" "$$2" "$$3";						\
	else											\
	    _buildouT_addopt "$$1" "$$2" "$$3";							\
	fi;											\
    };												\
    _builout_opt_remove() {									\
	if buildout_haveopt "$$1" "$$2"; then							\
	    _buildout_removeopt "$$1" "$$2";							\
	fi;											\
    };												\
    _buildout_opt() {										\
	echo "$$1: option '[$$3]/$$4' $$2 '$$5'";                                               \
	cfgfile="$$1";										\
	_buildout_opt_$$2 "$$3" "$$4" "$$5";							\
    };												\
    _buildout_opt
endef

buildout-net.cfg buildout-nonet.cfg: buildout.cfg
	mkdir -p $(DLCACHE)/downloads $(DLCACHE)/extends
	@(							\
	    echo "[buildout]";					\
	    echo "extends = buildout.cfg";			\
	    echo "download-cache = $(DLCACHE)/downloads";	\
	    echo "extends-cache = $(DLCACHE)/extends";		\
	    echo "install-from-cache = true";			\
	    echo "newest = false";				\
	) > buildout-nonet.cfg
	@(							\
	    echo "[buildout]";					\
	    echo "extends = buildout.cfg";			\
	    echo "download-cache = $(DLCACHE)/downloads";	\
	    echo "extends-cache = $(DLCACHE)/extends";		\
	    echo "install-from-cache = false";			\
	    echo "newest = true";				\
	) >  buildout-net.cfg

BUILDOUT_OPTS = -c buildout-net.cfg

init-nonet: BUILDOUT_OPTS = -c buildout-nonet.cfg
update-nonet: BUILDOUT_OPTS = -c buildout-nonet.cfg

bootstrap::
	sed -i -e '1s/^#!.*\/python/#!$(subst /,\/,$(PYTHON))/' $(PYTHON_DIR)/bin/*
	$(PYTHON) -c 'from zc.buildout.buildout import main; main(["bootstrap"])'

update::
	bin/buildout $(BUILDOUT_OPTS)

.gitignore::
	@$(gitignore) "*.egg-info/"
	@$(gitignore) "/buildout-net.cfg"
	@$(gitignore) "/buildout-nonet.cfg"

clean::
	rm -f buildout-net.cfg buildout-nonet.cfg

versions:
	@echo "# Add the following lines to [versions] in buildout.cfg to pin all packages"
	@bin/buildout -vvvvv | sed -ne 's/^Picked: //p' | sort | uniq 
.PHONY: versions

fullhelp::
	@echo "    versions"
	@echo "        Generate lines to be added to 'buildout.cfg' to pin all package"
	@echo "        versions."
	@echo