Makefile.settings

#### STANDARD SETTINGS ####

# Filenames
TEST_COMPOSE_FILE := docker/test/docker-compose.yml
REL_COMPOSE_FILE := docker/release/docker-compose.yml

# Docker Compose Project Names
REL_PROJECT := $(PROJECT_NAME)$(BUILD_ID)
TEST_PROJECT := $(REL_PROJECT)test

# Use these settings to specify a custom Docker registry
DOCKER_REGISTRY ?= docker.io

# WARNING: Set DOCKER_REGISTRY_AUTH to empty for Docker Hub
# Set DOCKER_REGISTRY_AUTH to auth endpoint for private Docker registry
DOCKER_REGISTRY_AUTH ?=

# Expression to login to Docker registry
DOCKER_LOGIN_EXPRESSION ?= docker login -u $$DOCKER_USER -p $$DOCKER_PASSWORD $(DOCKER_REGISTRY_AUTH)

# Arguments
NOPULL_ARG = $(findstring :nopull,$(ARGS))
VERBOSE_ARG = $(findstring :verbose,$(ARGS))
RELEASE_ARGS = -p $(REL_PROJECT) -f $(REL_COMPOSE_FILE) $(VERBOSE_FLAG)
TEST_ARGS = -p $(TEST_PROJECT) -f $(TEST_COMPOSE_FILE) $(VERBOSE_FLAG)
VERBOSE_FLAG = $(if $(VERBOSE_ARG),--verbose,)
NOPULL_FLAG = $(if $(NOPULL_ARG),,--pull)

# Set shell
SHELL=/bin/bash -e -o pipefail

# App version settings
COMMIT_TIMESTAMP := $(shell echo $$(git log -1 --pretty='format:%cd' --date='format:%Y%m%d%H%M%S' 2>/dev/null))
COMMIT_ID := $(shell echo $$(git rev-parse --short HEAD 2>/dev/null))
COMMIT_TAG := $(shell echo $$(git tag --points-at HEAD 2>/dev/null))
export APP_VERSION ?= $(COMMIT_TIMESTAMP).$(COMMIT_ID)$(if $(BUILD_ID),.$(BUILD_ID),)

# Docker host settings
DOCKER_HOST_IP := $(shell echo $$DOCKER_HOST | awk -F/ '{printf $$3}' | awk -F: '{printf $$1}')
DOCKER_HOST_IP := $(if $(DOCKER_HOST_IP),$(DOCKER_HOST_IP),localhost)

# Cosmetics
RED := "\e[1;31m"
YELLOW := "\e[1;33m"
NC := "\e[0m"
INFO := @bash -c 'printf $(YELLOW); echo "=> $$1"; printf $(NC)' MESSAGE
WARNING := @bash -c 'printf $(RED); echo "WARNING: $$1"; printf $(NC)' MESSAGE

# Extract extra arguments
ifeq ($(firstword $(MAKECMDGOALS)),$(filter $(firstword $(MAKECMDGOALS)),release test clean compose dcompose))
  ARGS := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
endif

# Extract tag arguments
ifeq ($(firstword $(MAKECMDGOALS)),$(filter $(firstword $(MAKECMDGOALS)),tag))
  TAG_ARGS_RAW := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
  ifeq ($(TAG_ARGS_RAW),)
    $(error You must specify a tag)
  endif
  TAG_ARGS += $(foreach tag,$(TAG_ARGS_RAW),$(shell echo $(tag) | sed -e 's/[^a-zA-Z0-9\.\-]/_/g'))
endif

# Image and Repository Tag introspection functions
# Syntax: $(call get_image_id,<docker-compose-environment>,<service-name>)
# Syntax: $(call get_repo_tags,<docker-compose-environment>,<service-name>,<fully-qualified-image-name>)
get_container_id = $$(docker-compose $(1) ps -q $(2))
get_image_id = $$(echo $(call get_container_id,$(1),$(2)) | xargs -I ARGS docker inspect -f '{{ .Image }}' ARGS)
get_container_state = $$(echo $(call get_container_id,$(1),$(2)) | xargs -I ID docker inspect -f '$(3)' ID)
filter_repo_tags = $(if $(findstring docker.io,$(1)),$(subst docker.io/,,$(1))[^[:space:]|\$$]*,$(1)[^[:space:]|\$$]*)
get_repo_tags = $$(echo $(call get_image_id,$(1),$(2)) | xargs -I ID docker inspect -f '{{range .RepoTags}}{{.}} {{end}}' ID | grep -oh "$(call filter_repo_tags,$(3))" | xargs)

# Port introspection functions
# Syntax: $(call get_port_mapping,<docker-compose-environment>,<service-name>,<internal-port>)
get_raw_port_mapping = $$(docker-compose $(1) ps -q $(2) | xargs -I ID docker port ID $(3))
get_port_mapping = $$(echo $$(IFS=':' read -r -a array <<< "$(call get_raw_port_mapping,$(1),$(2),$(3))" && echo "$${array[1]}"))

# Service health functions
# Syntax: $(call check_service_health,<docker-compose-environment>,<service-name>)
get_service_health = $$(echo $(call get_container_state,$(1),$(2),{{if .State.Running}}{{ .State.Health.Status }}{{end}}))
check_service_health = { \
  until [[ $(call get_service_health,$(1),$(2)) != starting ]]; \
    do sleep 1; \
  done; \
  if [[ $(call get_service_health,$(1),$(2)) != healthy ]]; \
    then echo $(2) failed health check; exit 1; \
  fi; \
}

# Tagging and Publishing functions
# Syntax: $(call tag_image,<docker-compose-environment>,<service-name>,<fully-qualified-tag>)
# Syntax: $(call publish_image,<docker-compose-environment>,<service-name>,<fully-qualified-repository>)
tag_image = $$(echo $(call get_image_id,$(1),$(2)) | xargs -I ARG docker tag ARG $(3);)
publish_image = { \
	for tag in $(call get_repo_tags,$(1),$(2),$(3)); \
		do echo $$tag | xargs -I TAG docker push TAG; \
	done; \
}

# Exit code function
# Syntax: $(call get_exit_code,<docker-compose-environment>,<service-name>)
get_exit_code = $$(echo $(call get_container_state,$(1),$(2),{{ .State.ExitCode }}))
check_exit_code = exit $(call get_exit_code,$(1),$(2))

# Dangling image function
# Syntax: $(call clean_dangling_images,<repository>)
clean_dangling_images = docker images -q -f dangling=true -f label=application=$(1) | xargs -I ARGS docker rmi -f ARGS || true