Makefile.venv

BUILD_HARNESS_REQ_TEMPLATE:=$(BUILD_HARNESS_PATH)/requirements.template
BUILD_HARNESS_REQ_NAME:=.build-harness.requirements.txt
BUILD_HARNESS_REQ:=$(CURDIR)/$(BUILD_HARNESS_REQ_NAME)
BUILD_HARNESS_PIPFILE_NAME:=.build-harness.Pipfile
BUILD_HARNESS_PIPFILE:=$(CURDIR)/$(BUILD_HARNESS_PIPFILE_NAME)
BUILD_HARNESS_VENV_NAME:=.build-harness.venv
BUILD_HARNESS_VENV:=$(CURDIR)/$(BUILD_HARNESS_VENV_NAME)
WITH_BH_VENV=$(shell test -f $(BUILD_HARNESS_REQ) && echo "source $(BUILD_HARNESS_VENV)/bin/activate 2>/dev/null &&")
LOCAL_PYTHON_VERSION=$(shell python -c 'import platform; ver=int(platform.python_version()[0]); print(ver)' 2>/dev/null)

BUILD_HARNESS_VENV_SKIP_EXISTING=false

# This doesn't conform to extreme edge-use-cases of modules/python/Makefile.env, but should cover >99% of use.
LOCAL_PROJECT_PYTHON_VERSION=$(shell if [ -e $(CURDIR)/Pipfile ]; then awk '/python_version*([0-9\.]*)/' Pipfile | awk 'match($$0, /[0-9\.]+/) {print substr($$0, RSTART, RLENGTH)}'; else echo ""; fi)
LOCAL_PROJECT_PYTHON_VERSION_MAJOR=$(shell echo "$(LOCAL_PROJECT_PYTHON_VERSION)" | cut -c1)


define which
$(shell $(WITH_BH_VENV) which $1 2>/dev/null)
endef

.PHONY: bh/venv/debug
bh/venv/debug:
	$(call print-var,LOCAL_PYTHON_VERSION)
	$(call print-var,LOCAL_PROJECT_PYTHON_VERSION)
	$(call print-var,LOCAL_PROJECT_PYTHON_VERSION_MAJOR)
	$(call print-var,BUILD_HARNESS_REQ)
	$(call print-var,BUILD_HARNESS_VENV)
	$(call print-var,BUILD_HARNESS_PIPFILE)
	$(call print-var,BUMPVERSION)
	$(call print-var,BLACK)
	$(call print-var,ISORT)

.PHONY: bh/venv
bh/venv: $(BUILD_HARNESS_VENV)

$(BUILD_HARNESS_REQ_TEMPLATE):
	@echo "[build-harness] MISSING: $@"

$(BUILD_HARNESS_REQ): $(BUILD_HARNESS_REQ_TEMPLATE)
	@if [ -f $@ ]; then echo "Removing previously generated build-harness requirements" && rm $@; fi
	@echo "Generating $@"
	@cat $(BUILD_HARNESS_REQ_TEMPLATE) | xargs -I % bash -c 'if [ -z "$$(which % 2>/dev/null)" ]; then echo "%" >> $@; fi'

$(BUILD_HARNESS_PIPFILE): $(BUILD_HARNESS_REQ)
	@if [ -f $@ ]; then echo "Removing previously generated build-harness Pipfile" && rm $@; fi
	@if [ -n "$$(which pipenv 2>/dev/null)" ]; then \
		echo "Generating $@"; \
		if [ -n "$(LOCAL_PROJECT_PYTHON_VERSION)" ]; then \
			echo "[requires]" >> $@; \
			echo "python_version = \"$(LOCAL_PROJECT_PYTHON_VERSION)\"" >> $@; \
		fi; \
		echo "[packages]" >> $@; \
		if [ "$(BUILD_HARNESS_VENV_SKIP_EXISTING)" = true ] ; then \
			echo "Will skip required packages that exist in your path..."; \
			cat $(BUILD_HARNESS_REQ) | xargs -I % bash -c 'if [ -z "$$(which % 2>/dev/null)" ]; then echo "% = \"*\"" >> $@; fi'; \
		else \
			cat $(BUILD_HARNESS_REQ) | xargs -I % bash -c 'echo "% = \"*\"" >> $@'; \
		fi; \
	fi

$(BUILD_HARNESS_VENV): $(BUILD_HARNESS_REQ) $(BUILD_HARNESS_PIPFILE)
	@if [ $(LOCAL_PYTHON_VERSION) -eq 2 ]; then \
		if [ $(LOCAL_PROJECT_PYTHON_VERSION_MAJOR) -eq 3 ]; then  \
			echo "WARNING: Building a Python 3 project with Python 2."; \
			echo "'It might..just..work.' - Carrot"; \
		else \
			echo "ERROR: Python $(LOCAL_PYTHON_VERSION) is unsupported by build-harness! Unable to install build-harness python dependencies automatically."; exit 1; \
		fi; \
	fi
	@if [ -s $(BUILD_HARNESS_REQ) ]; then echo "Installing (Python $(LOCAL_PROJECT_PYTHON_VERSION) project via Python $(LOCAL_PYTHON_VERSION)): $$(cat $(BUILD_HARNESS_REQ) | tr '\n' ' ')"; fi
	@if [ -n "$$(which pipenv 2>/dev/null)" ]; then \
		echo "Installing build-harness requirements with pipenv..."; \
		( \
			if [ $(LOCAL_PYTHON_VERSION) -eq 2 ]; then virtualenv $@; else python -m venv $@; fi \
			&& source $@/bin/activate && PIPENV_PIPFILE=$(BUILD_HARNESS_PIPFILE) PIPENV_QUIET=1 pipenv --bare install --dev --pre \
		); if [ $$? -ne 0 ]; then rm -rf $@; fi; \
	else \
		echo "WARNING: Installing build-harness requirements with venv + pip because pipenv was not installed..."; \
		( \
			if [ $(LOCAL_PYTHON_VERSION) -eq 2 ]; then virtualenv $@; else python -m venv $@; fi \
			&& source $@/bin/activate && pip install -r $(BUILD_HARNESS_REQ) --ignore-installed \
		); if [ $$? -ne 0 ]; then rm -rf $@; fi; \
	fi