.EXPORT_ALL_VARIABLES:

PYTHON ?= $(shell command -v python3 python|head -n1)
# Keep docker before podman due to:
# https://github.com/containers/podman/issues/7602
ENGINE ?= $(shell command -v docker podman|head -n1)
COMPOSE ?= $(shell command -v docker-compose podman-compose|head -n1)

# localhost/ prefix must be present in order to assure docker/podman compatibility:
# https://github.com/containers/buildah/issues/1034
IMAGE_TAG=localhost/elastic-recheck
# Enable newer docker buildkit if available
DOCKER_BUILDKIT=1
COMPOSE_DOCKER_CLI_BUILD=1
# ssh opts to add, used only for testing
SSH_OPTS=-o "StrictHostKeyChecking no" -o "UserKnownHostsFile /dev/null"

.PHONY: default
default: help

define PRINT_HELP_PYSCRIPT
import re, sys

print("Usage: make <target>\n")
cmds = {}
for line in sys.stdin:
	match = re.match(r'^([a-zA-Z_-]+):.*?## (.*)$$', line)
	if match:
	  target, help = match.groups()
	  cmds.update({target: help})
for cmd in sorted(cmds):
		print(f"  {cmd:12} {cmds[cmd]}")
endef
export PRINT_HELP_PYSCRIPT

.PHONY: help
help:
	@$(PYTHON) -c "$$PRINT_HELP_PYSCRIPT" < $(MAKEFILE_LIST)

.PHONY: check-env
check-env:
ifndef GERRIT_USER
	$(error GERRIT_USER is undefined, you need to define it to run this command)
endif

.PHONY: build
build: data/id_ecdsa check-env  ## Build image using $(ENGINE)
	@echo "Checking that current user can connect to gerit using ssh..."""
	@python3 ./tools/ssh-check.py
	$(ENGINE) build -t $(IMAGE_TAG) .
	@echo "Image size: $$($(ENGINE) image inspect --format='scale=0; {{.Size}}/1024/1024' $(IMAGE_TAG) | bc)MB"
	@echo "Validate that built container can also connect to gerrit..."""
	$(ENGINE) run --env GERRIT_USER -it $(IMAGE_TAG) python3 /root/ssh-check.py

.PHONY: up
up: data/id_ecdsa check-env ## Run containers
	@# validates that container has credentials and connectivity to talk with gerrit server
	@# Validate the builder image can connect to server
	@# $(ENGINE) run --env GERRIT_USER -it $(IMAGE_TAG) python3 /root/ssh-check.py
	@# --abort-on-container-exit
	$(COMPOSE) up --force-recreate --remove-orphans --abort-on-container-exit <<<y
	@# $(ENGINE) container stop elastic-recheck
	@# bash -c "$(ENGINE) rm elastic-recheck || true"
	@# $(ENGINE) run --env ES_URL --env LS_URL --env DB_URI --env GERRIT_HOST --env GERRIT_USER --env IRC_NICK --env IRC_PASS -it --name elastic-recheck elastic-recheck:latest

.PHONY: down
down: ## Destroy containers
	$(COMPOSE) down --remove-orphans --rmi local

.PHONY: into
into: ## Starts bash inside $(ENGINE) image
	$(ENGINE) run --mount 'type=volume,src=er-volume,dst=/data,volume-driver=local' -it $(IMAGE_TAG) /bin/sh
	# $(ENGINE) exec -it er-cron /bin/sh
	@# $(COMPOSE) run elastic-recheck bash

.PHONY: dive
dive:  ## Use `dive` tool to investigate container size
	# https://github.com/wagoodman/dive
	dive $(IMAGE_TAG)

data/id_ecdsa:
	# this key must be unencrypted, so create a spare one for testing and
	# add it to your gerrit user configuration
	cp -f ~/.ssh/id_ecdsa_insecure data/id_ecdsa

.PHONY: clean
clean:  ## Use clean to remove all temp files, including container and images but **not** data/
	$(ENGINE) image rm --force $(IMAGE_TAG)

.PHONY: key
key: ## Makes a SSH key compatibile with paramiko (overrides existing one)
	@mkdir -p data
	@rm data/id_ecdsa || true
	@ssh-keygen -q -N '' -m PEM -t ecdsa -f data/id_ecdsa
	@echo "WARN: Please assign key below to your gerrit user using the web interface:"
	@ssh-keygen -l -f data/id_ecdsa


.PHONY: wheel
wheel:  ## Use clean to remove all temp files, including container and images but **not** data/
	mkdir -p build
	cd build && pip3 wheel ..