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# Copyright (c) 2015-2017, Loïc Hoguin <[email protected]>
# This file is part of erlang.mk and subject to the terms of the ISC License.
.PHONY: distclean-kerl
KERL_INSTALL_DIR ?= $(HOME)/erlang
ifeq ($(strip $(KERL)),)
KERL := $(ERLANG_MK_TMP)/kerl/kerl
endif
KERL_DIR = $(ERLANG_MK_TMP)/kerl
export KERL
KERL_GIT ?= https://github.com/kerl/kerl
KERL_COMMIT ?= master
KERL_MAKEFLAGS ?=
OTP_GIT ?= https://github.com/erlang/otp
define kerl_otp_target
$(KERL_INSTALL_DIR)/$(1): $(KERL)
$(verbose) if [ ! -d $$@ ]; then \
MAKEFLAGS="$(KERL_MAKEFLAGS)" $(KERL) build git $(OTP_GIT) $(1) $(1); \
$(KERL) install $(1) $(KERL_INSTALL_DIR)/$(1); \
fi
endef
$(KERL): $(KERL_DIR)
$(KERL_DIR): | $(ERLANG_MK_TMP)
$(gen_verbose) git clone --depth 1 $(KERL_GIT) $(ERLANG_MK_TMP)/kerl
$(verbose) cd $(ERLANG_MK_TMP)/kerl && git checkout $(KERL_COMMIT)
$(verbose) chmod +x $(KERL)
distclean:: distclean-kerl
distclean-kerl:
$(gen_verbose) rm -rf $(KERL_DIR)
# Allow users to select which version of Erlang/OTP to use for a project.
ifneq ($(strip $(LATEST_ERLANG_OTP)),)
# In some environments it is necessary to filter out master.
ERLANG_OTP := $(notdir $(lastword $(sort\
$(filter-out $(KERL_INSTALL_DIR)/master $(KERL_INSTALL_DIR)/OTP_R%,\
$(filter-out %-rc1 %-rc2 %-rc3,$(wildcard $(KERL_INSTALL_DIR)/*[^-native]))))))
endif
ERLANG_OTP ?=
# Use kerl to enforce a specific Erlang/OTP version for a project.
ifneq ($(strip $(ERLANG_OTP)),)
export PATH := $(KERL_INSTALL_DIR)/$(ERLANG_OTP)/bin:$(PATH)
SHELL := env PATH=$(PATH) $(SHELL)
$(eval $(call kerl_otp_target,$(ERLANG_OTP)))
# Build Erlang/OTP only if it doesn't already exist.
ifeq ($(wildcard $(KERL_INSTALL_DIR)/$(ERLANG_OTP))$(BUILD_ERLANG_OTP),)
$(info Building Erlang/OTP $(ERLANG_OTP)... Please wait...)
$(shell $(MAKE) $(KERL_INSTALL_DIR)/$(ERLANG_OTP) ERLANG_OTP=$(ERLANG_OTP) BUILD_ERLANG_OTP=1 >&2)
endif
endif
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