MAKEFLAGS += --warn-undefined-variables -j1
SHELL := bash
.SHELLFLAGS := -eu -o pipefail -c
.DEFAULT_GOAL := all
.DELETE_ON_ERROR:
.SUFFIXES:
.PHONY:

# Environment switches
MAKE_ENV ?= docker
COMPOSE_RUN_SHELL_FLAGS ?= --rm

# Directories
VENDOR_DIR ?= vendor/bundle
GEMFILES_DIR ?= gemfiles

# Host binaries
BASH ?= bash
COMPOSE ?= docker-compose
ID ?= id
MKDIR ?= mkdir
RM ?= rm

# Container binaries
BUNDLE ?= bundle
APPRAISAL ?= appraisal
RAKE ?= rake

# Files
GEMFILES ?= $(subst _,-,$(patsubst $(GEMFILES_DIR)/%.gemfile,%,\
	$(wildcard $(GEMFILES_DIR)/*.gemfile)))
TEST_GEMFILES := $(GEMFILES:%=test-%)

# Define a generic shell run wrapper
# $1 - The command to run
ifeq ($(MAKE_ENV),docker)
define run-shell
	$(COMPOSE) run $(COMPOSE_RUN_SHELL_FLAGS) \
		-e LANG=en_US.UTF-8 -e LANGUAGE=en_US.UTF-8 -e LC_ALL=en_US.UTF-8 \
		-e HOME=/tmp -e BUNDLE_APP_CONFIG=/app/.bundle \
		-u `$(ID) -u` test bash -c 'sleep 0.1; echo; $(1)'
endef
else ifeq ($(MAKE_ENV),baremetal)
define run-shell
	$(1)
endef
endif

all:
	# Alarmable
	#
	# install            Install the dependencies
	# test               Run the whole test suite
	# clean              Clean the dependencies
	#
	# shell              Run an interactive shell on the container
	# shell-irb          Run an interactive IRB shell on the container

install:
	# Install the dependencies
	@$(MKDIR) -p $(VENDOR_DIR)
	@$(call run-shell,$(BUNDLE) check || $(BUNDLE) install --path $(VENDOR_DIR))
	@$(call run-shell,$(BUNDLE) exec $(APPRAISAL) install)

test: install
	# Run the whole test suite
	@$(call run-shell,$(BUNDLE) exec $(RAKE))

$(TEST_GEMFILES): GEMFILE=$(@:test-%=%)
$(TEST_GEMFILES):
	# Run the whole test suite ($(GEMFILE))
	@$(call run-shell,$(BUNDLE) exec $(APPRAISAL) $(GEMFILE) $(RAKE))

clean:
	# Clean the dependencies
	@$(RM) -rf $(VENDOR_DIR)

clean-containers:
	# Clean running containers
ifeq ($(MAKE_ENV),docker)
	@$(COMPOSE) down
endif

distclean: clean clean-containers

shell: install
	# Run an interactive shell on the container
	@$(call run-shell,$(BASH) -i)

shell-irb: install
	# Run an interactive IRB shell on the container
	@$(call run-shell,bin/console)

release:
	# Release a new gem version
	@$(BUNDLE) exec $(RAKE) release