common.mk

# Example usage :
# Create the main Makefile in the root project directory.
# include Makefile.common

# env info
VARS_OLD	:= $(.VARIABLES)
SHELL		:= sh
DATE 		:= $(shell date "+%Y-%m-%d %H:%M")
USER 		:= $(shell id -u -n)
ARCH      	:= $(shell uname)
UNAMEA      := $(shell uname -a)
WORKDIR		:= $(shell basename $$(pwd))
ifeq ($(ARCH),Darwin)
    SHA=shasum -a 256
else
	SHA=sha256sum
endif
#=======================================================================================================================
# git info
git_installed= $(shell if [ ` command -v git ` ];then echo 'yes'; fi)
ifeq "$(git_installed)" ""
  $(error Please install git before running `make`)
endif
GIT_BRANCH =$(shell git name-rev --name-only HEAD)
GIT_COMMIT =$(shell git rev-parse --short HEAD)

#GIT_STATUS =$(shell echo"$$( git status -s -uno) ")
GIT_STATUS=$(shell git status -s -uno)
GIT_STATUS_HASH =$(shell git status -s -uno | $(SHA) | awk '{ print $$1 }')
GIT_STATUS ?=no change
GIT_DIRTY =$(shell git describe --tags --dirty --always)
GIT_LAST_DATE=$(shell  echo $$(git log -1 --format=%cd))
#=======================================================================================================================
# go build info
go_installed= $(shell if [ ` command -v go ` ];then echo 'yes'; fi)
ifeq ($(go_installed),yes)
GOPATH 		?= $(shell go env GOPATH)
# Ensure GOPATH is set before running build process.
ifeq "$(GOPATH)" ""
  $(error Please set the environment variable GOPATH before running `make`)
endif


GO   					:= GO111MODULE=on go
GO_BUILD    			:= $(GO) build $(BUILD_FLAG) -tags codes
GO_TEST					:= $(GO) test -p $(P)
PACKAGE_LIST  			:= go list ./...| grep -vE "cmd"
PACKAGE_URIS  			:= $$($(PACKAGE_LIST))
ROOT_URL				:=$(shell head -n 1 go.mod | sed  "s|module ||")
PACKAGE_RELATIVE_PATHS 	:= $(PACKAGE_LIST) | sed 's|$(ROOT_URL)/||'

GO_VERSION 				:=$(shell go version | sed 's|go version ||')
VERSION 				:=$(shell cat VERSION)
GO_FILES     			:=$(shell echo $$(find $$($(PACKAGE_RELATIVE_PATHS)) -name "*.go"))

ifdef version_go_file
GO_BUILD_VERSION_PKG := $(shell $(PACKAGE_LIST) | grep )
LD_FLAGS = -X '$(GO_BUILD_VERSION_PKG).Version=$(VERSION)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).Branch=$(GIT_BRANCH)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).Commit=$(GIT_COMMIT)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).StatusHash=$(GIT_STATUS_HASH)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).User=$(USER)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).Time=$(DATE)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).Status=$(GIT_STATUS)'
LD_FLAGS += -X '$(GO_BUILD_VERSION_PKG).GoVersion=$(GO_VERSION)'
endif #version_go_file

endif #($(go_installed),yes)
#=======================================================================================================================
ifndef no_print_vars
$(info ==== make in [$(UNAMEA)] ====)
$(foreach v,                                        \
  $(filter-out $(VARS_OLD) VARS_OLD,$(.VARIABLES)), \
  $(info $(v) = $($(v))))
$(info ================================================================ end common.mk ========================================================================)
endif


.PHONY: common-style
common-style:
	@echo ">> checking code style"
	@fmtRes=$$(gofmt -d $$(find . -path ./vendor -prune -o -name '*.go' -print)); \
	if [ -n "$${fmtRes}" ]; then \
		echo "gofmt checking failed!"; echo "$${fmtRes}"; echo; \
		exit 1; \
	fi