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

# Configuration.

DTL_FULL_PATH ?=
DTL_PATH ?= templates/
DTL_SUFFIX ?= _dtl

# Verbosity.

dtl_verbose_0 = @echo " DTL   " $(filter %.dtl,$(?F));
dtl_verbose = $(dtl_verbose_$(V))

# Core targets.

DTL_FILES = $(sort $(call core_find,$(DTL_PATH),*.dtl))

ifneq ($(DTL_FILES),)

ifdef DTL_FULL_PATH
BEAM_FILES += $(addprefix ebin/,$(patsubst %.dtl,%_dtl.beam,$(subst /,_,$(DTL_FILES:$(DTL_PATH)%=%))))
else
BEAM_FILES += $(addprefix ebin/,$(patsubst %.dtl,%_dtl.beam,$(notdir $(DTL_FILES))))
endif

# Rebuild templates when the Makefile changes.
$(DTL_FILES): $(MAKEFILE_LIST)
	@touch $@

define erlydtl_compile.erl
	[begin
		Module0 = case "$(strip $(DTL_FULL_PATH))" of
			"" ->
				filename:basename(F, ".dtl");
			_ ->
				"$(DTL_PATH)" ++ F2 = filename:rootname(F, ".dtl"),
				re:replace(F2, "/",  "_",  [{return, list}, global])
		end,
		Module = list_to_atom(string:to_lower(Module0) ++ "$(DTL_SUFFIX)"),
		case erlydtl:compile(F, Module, [{out_dir, "ebin/"}, return_errors, {doc_root, "templates"}]) of
			ok -> ok;
			{ok, _} -> ok
		end
	end || F <- string:tokens("$(1)", " ")],
	halt().
endef

ebin/$(PROJECT).app:: $(DTL_FILES) | ebin/
	$(if $(strip $?),\
		$(dtl_verbose) $(call erlang,$(call erlydtl_compile.erl,$?),-pa ebin/ $(DEPS_DIR)/erlydtl/ebin/))

endif