# Copyright 2018 The Prometheus Authors
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Ensure GOBIN is not set during build so that promu is installed to the correct path
unexport GOBIN

GO           ?= go
GOFMT        ?= $(GO)fmt
FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
STATICCHECK  := $(FIRST_GOPATH)/bin/staticcheck
pkgs          = $(shell $(GO) list ./... | grep -v /vendor/)

PREFIX                  ?= $(shell pwd)
BIN_DIR                 ?= $(shell pwd)

ifdef DEBUG
  bindata_flags = -debug
endif

STATICCHECK_IGNORE =

all: format staticcheck build test

style:
	@echo ">> checking code style"
	@! $(GOFMT) -d $(shell find . -path ./vendor -prune -o -name '*.go' -print) | grep '^'

check_license:
	@echo ">> checking license header"
	@./scripts/check_license.sh

test: fixtures/.unpacked sysfs/fixtures/.unpacked
	@echo ">> running all tests"
	@$(GO) test -race $(shell $(GO) list ./... | grep -v /vendor/ | grep -v examples)

format:
	@echo ">> formatting code"
	@$(GO) fmt $(pkgs)

vet:
	@echo ">> vetting code"
	@$(GO) vet $(pkgs)

staticcheck: $(STATICCHECK)
	@echo ">> running staticcheck"
	@$(STATICCHECK) -ignore "$(STATICCHECK_IGNORE)" $(pkgs)

%/.unpacked: %.ttar
	./ttar -C $(dir $*) -x -f $*.ttar
	touch $@

update_fixtures: fixtures.ttar sysfs/fixtures.ttar

%fixtures.ttar: %/fixtures
	rm -v $(dir $*)fixtures/.unpacked
	./ttar -C $(dir $*) -c -f $*fixtures.ttar fixtures/

$(FIRST_GOPATH)/bin/staticcheck:
	@GOOS= GOARCH= $(GO) get -u honnef.co/go/tools/cmd/staticcheck

.PHONY: all style check_license format test vet staticcheck

# Declaring the binaries at their default locations as PHONY targets is a hack
# to ensure the latest version is downloaded on every make execution.
# If this is not desired, copy/symlink these binaries to a different path and
# set the respective environment variables.
.PHONY: $(GOPATH)/bin/staticcheck