# Copyright (c) 2013-2015, Loïc Hoguin <essen@ninenines.eu>
# Copyright (c) 2015-2016, Jean-Sébastien Pédron <jean-sebastien@rabbitmq.com>
# This file is part of erlang.mk and subject to the terms of the ISC License.

# Fetch dependencies recursively (without building them).

.PHONY: fetch-deps fetch-doc-deps fetch-rel-deps fetch-test-deps \
	fetch-shell-deps

.PHONY: $(ERLANG_MK_RECURSIVE_DEPS_LIST) \
	$(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST) \
	$(ERLANG_MK_RECURSIVE_REL_DEPS_LIST) \
	$(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST) \
	$(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST)

fetch-deps: $(ERLANG_MK_RECURSIVE_DEPS_LIST)
fetch-doc-deps: $(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST)
fetch-rel-deps: $(ERLANG_MK_RECURSIVE_REL_DEPS_LIST)
fetch-test-deps: $(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST)
fetch-shell-deps: $(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST)

ifneq ($(SKIP_DEPS),)
$(ERLANG_MK_RECURSIVE_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_REL_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST):
	$(verbose) :> $@
else
# By default, we fetch "normal" dependencies. They are also included no
# matter the type of requested dependencies.
#
# $(ALL_DEPS_DIRS) includes $(BUILD_DEPS).

$(ERLANG_MK_RECURSIVE_DEPS_LIST): $(LOCAL_DEPS_DIRS) $(ALL_DEPS_DIRS)
$(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST): $(LOCAL_DEPS_DIRS) $(ALL_DEPS_DIRS) $(ALL_DOC_DEPS_DIRS)
$(ERLANG_MK_RECURSIVE_REL_DEPS_LIST): $(LOCAL_DEPS_DIRS) $(ALL_DEPS_DIRS) $(ALL_REL_DEPS_DIRS)
$(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST): $(LOCAL_DEPS_DIRS) $(ALL_DEPS_DIRS) $(ALL_TEST_DEPS_DIRS)
$(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST): $(LOCAL_DEPS_DIRS) $(ALL_DEPS_DIRS) $(ALL_SHELL_DEPS_DIRS)

# Allow to use fetch-deps and $(DEP_TYPES) to fetch multiple types of
# dependencies with a single target.
ifneq ($(filter doc,$(DEP_TYPES)),)
$(ERLANG_MK_RECURSIVE_DEPS_LIST): $(ALL_DOC_DEPS_DIRS)
endif
ifneq ($(filter rel,$(DEP_TYPES)),)
$(ERLANG_MK_RECURSIVE_DEPS_LIST): $(ALL_REL_DEPS_DIRS)
endif
ifneq ($(filter test,$(DEP_TYPES)),)
$(ERLANG_MK_RECURSIVE_DEPS_LIST): $(ALL_TEST_DEPS_DIRS)
endif
ifneq ($(filter shell,$(DEP_TYPES)),)
$(ERLANG_MK_RECURSIVE_DEPS_LIST): $(ALL_SHELL_DEPS_DIRS)
endif

ERLANG_MK_RECURSIVE_TMP_LIST := $(abspath $(ERLANG_MK_TMP)/recursive-tmp-deps-$(shell echo $$PPID).log)

$(ERLANG_MK_RECURSIVE_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_REL_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST) \
$(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST): | $(ERLANG_MK_TMP)
ifeq ($(IS_APP)$(IS_DEP),)
	$(verbose) rm -f $(ERLANG_MK_RECURSIVE_TMP_LIST)
endif
	$(verbose) touch $(ERLANG_MK_RECURSIVE_TMP_LIST)
	$(verbose) set -e; for dep in $^ ; do \
		if ! grep -qs ^$$dep$$ $(ERLANG_MK_RECURSIVE_TMP_LIST); then \
			echo $$dep >> $(ERLANG_MK_RECURSIVE_TMP_LIST); \
			if grep -qs -E "^[[:blank:]]*include[[:blank:]]+(erlang\.mk|.*/erlang\.mk|.*ERLANG_MK_FILENAME.*)$$" \
			 $$dep/GNUmakefile $$dep/makefile $$dep/Makefile; then \
				$(MAKE) -C $$dep fetch-deps \
				 IS_DEP=1 \
				 ERLANG_MK_RECURSIVE_TMP_LIST=$(ERLANG_MK_RECURSIVE_TMP_LIST); \
			fi \
		fi \
	done
ifeq ($(IS_APP)$(IS_DEP),)
	$(verbose) sort < $(ERLANG_MK_RECURSIVE_TMP_LIST) | \
		uniq > $(ERLANG_MK_RECURSIVE_TMP_LIST).sorted
	$(verbose) cmp -s $(ERLANG_MK_RECURSIVE_TMP_LIST).sorted $@ \
		|| mv $(ERLANG_MK_RECURSIVE_TMP_LIST).sorted $@
	$(verbose) rm -f $(ERLANG_MK_RECURSIVE_TMP_LIST).sorted
	$(verbose) rm $(ERLANG_MK_RECURSIVE_TMP_LIST)
endif
endif # ifneq ($(SKIP_DEPS),)

# List dependencies recursively.

.PHONY: list-deps list-doc-deps list-rel-deps list-test-deps \
	list-shell-deps

list-deps: $(ERLANG_MK_RECURSIVE_DEPS_LIST)
list-doc-deps: $(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST)
list-rel-deps: $(ERLANG_MK_RECURSIVE_REL_DEPS_LIST)
list-test-deps: $(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST)
list-shell-deps: $(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST)

list-deps list-doc-deps list-rel-deps list-test-deps list-shell-deps:
	$(verbose) cat $^

# Query dependencies recursively.

.PHONY: query-deps query-doc-deps query-rel-deps query-test-deps \
	query-shell-deps

QUERY ?= name fetch_method repo version

define query_target
$(1): $(2) clean-tmp-query.log
ifeq ($(IS_APP)$(IS_DEP),)
	$(verbose) rm -f $(4)
endif
	$(verbose) $(foreach dep,$(3),\
		echo $(PROJECT): $(foreach q,$(QUERY),$(call query_$(q),$(dep))) >> $(4) ;)
	$(if $(filter-out query-deps,$(1)),,\
		$(verbose) set -e; for dep in $(3) ; do \
			if grep -qs ^$$$$dep$$$$ $(ERLANG_MK_TMP)/query.log; then \
				:; \
			else \
				echo $$$$dep >> $(ERLANG_MK_TMP)/query.log; \
				$(MAKE) -C $(DEPS_DIR)/$$$$dep $$@ QUERY="$(QUERY)" IS_DEP=1 || true; \
			fi \
		done)
ifeq ($(IS_APP)$(IS_DEP),)
	$(verbose) touch $(4)
	$(verbose) cat $(4)
endif
endef

clean-tmp-query.log:
ifeq ($(IS_DEP),)
	$(verbose) rm -f $(ERLANG_MK_TMP)/query.log
endif

$(eval $(call query_target,query-deps,$(ERLANG_MK_RECURSIVE_DEPS_LIST),$(BUILD_DEPS) $(DEPS),$(ERLANG_MK_QUERY_DEPS_FILE)))
$(eval $(call query_target,query-doc-deps,$(ERLANG_MK_RECURSIVE_DOC_DEPS_LIST),$(DOC_DEPS),$(ERLANG_MK_QUERY_DOC_DEPS_FILE)))
$(eval $(call query_target,query-rel-deps,$(ERLANG_MK_RECURSIVE_REL_DEPS_LIST),$(REL_DEPS),$(ERLANG_MK_QUERY_REL_DEPS_FILE)))
$(eval $(call query_target,query-test-deps,$(ERLANG_MK_RECURSIVE_TEST_DEPS_LIST),$(TEST_DEPS),$(ERLANG_MK_QUERY_TEST_DEPS_FILE)))
$(eval $(call query_target,query-shell-deps,$(ERLANG_MK_RECURSIVE_SHELL_DEPS_LIST),$(SHELL_DEPS),$(ERLANG_MK_QUERY_SHELL_DEPS_FILE)))