export RUSTC := rustc
RUSTDOC := rustdoc
RUSTFLAGS := -O --cfg ndebug
BUILDDIR := build
INSTALL_DIR := %PREFIX%
LD_LIBRARY_PATH := $(LD_LIBRARY_PATH):build:submodules/rust-phf/build:submodules/rust-openssl/target
ENV := LD_LIBRARY_PATH=$(LD_LIBRARY_PATH) DYLD_LIBRARY_PATH=$(LD_LIBRARY_PATH)

###############################################################################
# Dependencies
###############################################################################
PHF_DIR := submodules/rust-phf
PHF := $(foreach file,$(shell $(MAKE) -s -C $(PHF_DIR) print-targets),$(PHF_DIR)/$(file))
OPENSSL_DIR := submodules/rust-openssl
OPENSSL := $(foreach file,$(shell $(MAKE) -s -C $(OPENSSL_DIR) print-target),$(OPENSSL_DIR)/$(file))

.NOTPARALLEL: $(PHF)
$(PHF): | $(BUILDDIR)
	$(MAKE) -C $(PHF_DIR)

.NOTPARALLEL: $(OPENSSL)
$(OPENSSL): | $(BUILDDIR)
	$(MAKE) -C $(OPENSSL_DIR)

###############################################################################
# Main targets
###############################################################################
POSTGRES_LIB_FILE := src/lib/lib.rs
POSTGRES_LIB := $(foreach file,$(shell $(RUSTC) --print-file-name $(POSTGRES_LIB_FILE)),$(BUILDDIR)/$(file))
POSTGRES_TEST_FILE := src/test/test.rs
POSTGRES_TEST := $(BUILDDIR)/$(shell $(RUSTC) --test --print-file-name $(POSTGRES_TEST_FILE))

POSTGRES_LIB_DEPS := $(BUILDDIR)/postgres.d
POSTGRES_TEST_DEPS := $(BUILDDIR)/postgres_test.d

LINK_ARGS := $(foreach file,$(OPENSSL),-L $(dir $(file))) $(foreach file,$(PHF),-L $(dir $(file)))

-include $(POSTGRES_LIB_DEPS)
-include $(POSTGRES_TEST_DEPS)

$(BUILDDIR):
	mkdir -p $@

.NOTPARALLEL: $(POSTGRES_LIB)
$(POSTGRES_LIB): $(POSTGRES_LIB_FILE) $(PHF) $(OPENSSL) | $(BUILDDIR)
	$(ENV) $(RUSTC) $(RUSTFLAGS) $(LINK_ARGS) --dep-info $(POSTGRES_LIB_DEPS) \
		--out-dir $(@D) $<

$(POSTGRES_TEST): $(POSTGRES_TEST_FILE) $(POSTGRES_LIB) | $(BUILDDIR)
	$(ENV) $(RUSTC) $(RUSTFLAGS) $(LINK_ARGS) -L $(BUILDDIR) --dep-info $(POSTGRES_TEST_DEPS) \
		--out-dir $(@D) --test $<

all: $(POSTGRES_LIB)

.DEFAULT_GOAL := all
.PHONY: all

###############################################################################
# Utility
###############################################################################
check-test: $(POSTGRES_TEST)
	$(POSTGRES_TEST)

check-doc: $(POSTGRES_LIB)
	$(ENV) $(RUSTDOC) $(LINK_ARGS) -L $(BUILDDIR) --test $(POSTGRES_LIB_FILE)

check: check-test check-doc

clean:
	rm -rf $(BUILDDIR)

clean-deps:
	$(MAKE) -C $(PHF_DIR) clean
	$(MAKE) -C $(OPENSSL_DIR) clean
	rm -f $(PHF_STAMP) $(OPENSSL_STAMP)

doc: $(OPENSSL) $(PHF)
	$(ENV) $(RUSTDOC) $(LINK_ARGS) $(POSTGRES_LIB_FILE)

install: $(POSTGRES_LIB)
	$(MAKE) -C $(PHF_DIR) install INSTALL_DIR=$(abspath $(INSTALL_DIR))
	$(MAKE) -C $(PHF_DIR) install INSTALL_DIR=$(abspath $(INSTALL_DIR))
	install $(POSTGRES_LIB) $(INSTALL_DIR)

print-targets:
	@echo $(POSTGRES_LIB)

.PHONY: check-test check-doc check clean clean-deps doc install print-targets