# Recursive wildcard function
# http://blog.jgc.org/2011/07/gnu-make-recursive-wildcard-function.html
rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) \
  $(filter $(subst *,%,$2),$d))

include config.mk

# Target-and-rule "utility variables"
ifdef VERBOSE
  Q :=
  E =
else
  Q := @
  E = echo $(1)
endif

S := $(CFG_SRC_DIR)
B := $(CFG_BUILD_DIR)

#VPATH := $(S)src

# Delete the built-in rules.
.SUFFIXES:
%:: %,v
%:: RCS/%,v
%:: RCS/%
%:: s.%
%:: SCCS/s.%

MKFILE_DEPS := config.stamp $(call rwildcard,$(S)mk/,*)

CFG_RUSTC_FLAGS := $(RUSTFLAGS)

ifdef CFG_DISABLE_OPTIMIZE
  $(info cfg: disabling rustc optimization (CFG_DISABLE_OPTIMIZE))
  CFG_RUSTC_FLAGS +=
else
  CFG_RUSTC_FLAGS += -O
endif

ifdef CFG_ENABLE_DEBUG
  $(info cfg: enabling more debugging (CFG_ENABLE_DEBUG))
  CFG_RUSTC_FLAGS +=
  CFG_GCCISH_CFLAGS += -DRUST_DEBUG
else
  CFG_GCCISH_CFLAGS += -DRUST_NDEBUG
endif


export CFG_RUSTC
export CFG_RUSTC_FLAGS
export RUSTC=$(CFG_RUSTC)
export RUSTFLAGS=$(CFG_RUSTC_FLAGS)

######################################################################
# Re-configuration
######################################################################

ifndef CFG_DISABLE_MANAGE_SUBMODULES
# This is a pretty expensive operation but I don't see any way to avoid it
NEED_GIT_RECONFIG=$(shell cd "$(S)" && "$(CFG_GIT)" submodule status | grep -c '^\(+\|-\)')
else
NEED_GIT_RECONFIG=0
endif

ifeq ($(NEED_GIT_RECONFIG),0)
else
# If the submodules have changed then always execute config.mk
.PHONY: $(S)config.stamp
endif

$(S)Makefile $(S)config.mk: $(S)config.stamp

$(S)config.stamp : $(S)configure $(S)Makefile.in
	@$(call E, cfg: reconfiguring)
	$(Q)$(S)configure $(CFG_CONFIGURE_ARGS)


define DEF_SUBMODULE_VARS
DEPS_$(1) =
CFLAGS_$(1) =
DONE_$(1) = $$(B)src/$(1)/$(1).dummy
DEPS_SUBMODULES += $(1)
endef

# these will get populated.
DEPS_SUBMODULES =

$(foreach submodule,$(CFG_SUBMODULES),\
$(eval $(call DEF_SUBMODULE_VARS,$(submodule))))

# include submodule dependencies configuration
include $(S)mk/sub.mk

# Define how to make submodule targets
define DEF_SUBMODULE_RULES
# variables that depend on dependency definitions from sub.mk!
ENV_CFLAGS_$(1) = CFLAGS="$$(CFLAGS_$(1))"
ENV_RFLAGS_$(1) = RUSTFLAGS="$$(strip $$(CFG_RUSTC_FLAGS)) $$(addprefix -L $$(B)src/,$$(DEPS_$(1)))"

# use a rough approximation of submodule dependencies to trigger calling submodule make
# whenever a submodule changes
# TODO: this may be a bit brutish, but is there a better way?
ROUGH_DEPS_$(1)=$$(call rwildcard,$$(S)src/$(1),*h *c *cpp *rs *rc)
DONE_DEPS_$(1)=$$(foreach dep,$$(DEPS_$(1)),$$(DONE_$$(dep)))
# the main target for a submodule
# --
$$(DONE_$(1)) : $$(DONE_DEPS_$(1)) $$(ROUGH_DEPS_$(1))
#	@$$(call E, make: $(1))
#	@$$(call E, $(1) deps= $$(DEPS_$(1)))
#	@$$(call E, $(1) done_deps= $$(DONE_DEPS_$(1)))
#	@$$(call E, $(1) cflags= $$(ENV_CFLAGS_$(1)))
#	@$$(call E, $(1) rflags= $$(ENV_RFLAGS_$(1)))

	$$(Q) \
	$$(ENV_CFLAGS_$(1)) \
	$$(ENV_RFLAGS_$(1)) \
	$$(MAKE) -C $$(B)src/$(1) && touch $$(DONE_$(1))

# main submodule target
$(1) : $$(DONE_$(1))
.PHONY : $(1)
.NOTPARALLEL : $(1)
endef

$(foreach submodule,$(CFG_SUBMODULES),\
$(eval $(call DEF_SUBMODULE_RULES,$(submodule))))

RFLAGS_servo = $(strip $(CFG_RUSTC_FLAGS)) $(addprefix -L $(B)src/,$(DEPS_SUBMODULES))
SRC_servo = $(call rwildcard,$(S)src/servo/,*.rs)
CRATE_servo = $(S)src/servo/servo.rc
DONE_SUBMODULES = $(foreach dep,$(DEPS_SUBMODULES),$(DONE_$(dep)))

DEPS_servo = $(CRATE_servo) $(SRC_servo) $(DONE_SUBMODULES)

# rules that depend on having correct meta-target vars (DEPS_CLEAN, DEPS_servo, etc)
include $(S)mk/check.mk
include $(S)mk/clean.mk

.DEFAULT_GOAL := all
.PHONY:	all
all:    servo package

# Servo binaries

servo:	$(DEPS_servo)
	$(RUSTC) $(RFLAGS_servo) -o $@ $< --bin

# Darwin app packaging

ifeq ($(OSTYPE),darwin)

package: servo
	mkdir -p Servo.app/Contents/MacOS/src/rust-cocoa
	mkdir -p Servo.app/Contents/MacOS/src/rust-azure
	cp $(S)/Info.plist Servo.app/Contents/
	cp servo Servo.app/Contents/MacOS/
	cp src/rust-cocoa/lib*.dylib Servo.app/Contents/MacOS/src/rust-cocoa/
	cp src/rust-azure/lib*.dylib Servo.app/Contents/MacOS/src/rust-azure/

else

.PHONY: package
package:

endif