# -*- Mode: makefile -*-

# Copyright 2013 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.

.SUFFIXES:

current_dir := $(patsubst %/,%, $(dir $(abspath $(lastword $(MAKEFILE_LIST)))))

VERSION=$(shell cat $(current_dir)/version/VERSION)

OS=$(shell uname)
ARCH=$(shell uname -m)

# The release engineers apparently need to key their binary artifacts to the
# Mac OS X release family.
MAC_OS_X_VERSION ?= 10.8

MAKEFILE_DIR ?= $(realpath $(dir $(lastword $(MAKEFILE_LIST))))

BUILD_PATH = $(MAKEFILE_DIR)/.build

GO_VERSION := 1.4.2
GOOS ?= $(subst Darwin,darwin,$(subst Linux,linux,$(subst FreeBSD,freebsd,$(OS))))

ifeq ($(GOOS),darwin)
RELEASE_SUFFIX ?= -osx$(MAC_OS_X_VERSION)
else
RELEASE_SUFFIX ?=
endif

# Never honor GOBIN, should it be set at all.
unexport GOBIN

GOARCH ?= $(subst x86_64,amd64,$(patsubst i%86,386,$(ARCH)))
GOPKG  ?= go$(GO_VERSION).$(GOOS)-$(GOARCH)$(RELEASE_SUFFIX).tar.gz
GOURL  ?= https://golang.org/dl
GOROOT  = $(BUILD_PATH)/root/go
GOPATH  = $(BUILD_PATH)/root/gopath
GOCC    = $(GOROOT)/bin/go
TMPDIR  = /tmp
GOENV   = TMPDIR=$(TMPDIR) GOROOT=$(GOROOT) GOPATH=$(GOPATH)
GO      = $(GOENV) $(GOCC)
GOFMT   = $(GOROOT)/bin/gofmt

UNAME    := $(shell uname)
REPO_PATH = github.com/prometheus/prometheus
SELFLINK  = $(GOPATH)/src/$(REPO_PATH)

export PREFIX=$(BUILD_PATH)/root

export PATH := $(GOPATH)/bin:$(GOROOT)/bin:$(PATH)

export GO_TEST_FLAGS ?= -short

REV        := $(shell git rev-parse --short HEAD 2> /dev/null  || echo 'unknown')
BRANCH     := $(shell git rev-parse --abbrev-ref HEAD 2> /dev/null  || echo 'unknown')
HOSTNAME   := $(shell hostname -f)
BUILD_DATE := $(shell date +%Y%m%d-%H:%M:%S)
BUILDFLAGS := -ldflags \
  " -X $(REPO_PATH)/version.Version $(VERSION)\
		-X $(REPO_PATH)/version.Revision $(REV)\
		-X $(REPO_PATH)/version.Branch $(BRANCH)\
		-X $(REPO_PATH)/version.BuildUser $(USER)@$(HOSTNAME)\
		-X $(REPO_PATH)/version.BuildDate $(BUILD_DATE)\
		-X $(REPO_PATH)/version.GoVersion $(GO_VERSION)"
CURL := curl

ARCHIVEDIR := prometheus-$(VERSION).$(GOOS)-$(GOARCH)
ARCHIVE := $(ARCHIVEDIR).tar.gz