Enclose artifact generation process into Makefile.

Completely decouple the build process from Travis and other things we
cannot control.

.gitignore

@@ -23,3 +23,4 @@ _testmain.go
 
 *~
 *#
+.build

.travis.yml

@@ -4,4 +4,4 @@ go:
  - 1.1
 
 script:
- - make -f Makefile.TRAVIS
+ - make -f Makefile

Makefile

@@ -11,14 +11,53 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-MAKE_ARTIFACTS = search_index
+OS   = $(shell uname)
+ARCH = $(shell uname -m)
+
+BUILD_PATH = $(PWD)/.build
+
+export GO_VERSION = 1.1
+export GOOS 	    = $(subst Darwin,darwin,$(subst Linux,linux,$(OS)))
+export GOARCH		  = $(subst x86_64,amd64,$(ARCH))
+export GOPKG		  = go$(GO_VERSION).$(GOOS)-$(GOARCH).tar.gz
+export GOROOT		  = $(BUILD_PATH)/root/go
+export GOPATH		  = $(BUILD_PATH)/root/gopath
+export GOCC		    = $(GOROOT)/bin/go
+export TMPDIR		  = /tmp
+export GOENV		  = TMPDIR=$(TMPDIR) GOROOT=$(GOROOT) GOPATH=$(GOPATH)
+export GO	        = $(GOENV) $(GOCC)
+export GOFMT		  = $(GOROOT)/bin/gofmt
+
+FULL_GOPATH = $(GOPATH)/src/github.com/prometheus/client_golang
+FULL_GOPATH_BASE = $(GOPATH)/src/github.com/prometheus
+
+MAKE_ARTIFACTS = search_index $(BUILD_PATH)
 
 all: test
 
-build:
+$(BUILD_PATH):
+	mkdir -vp $(BUILD_PATH)
+
+$(BUILD_PATH)/cache: $(BUILD_PATH)
+	mkdir -vp $(BUILD_PATH)/cache
+
+$(BUILD_PATH)/root: $(BUILD_PATH)
+	mkdir -vp $(BUILD_PATH)/root
+
+$(BUILD_PATH)/cache/$(GOPKG): $(BUILD_PATH)/cache
+	curl -o $@ http://go.googlecode.com/files/$(GOPKG)
+
+$(GOCC): $(BUILD_PATH)/root $(BUILD_PATH)/cache/$(GOPKG)
+	tar -C $(BUILD_PATH)/root -xzf $(BUILD_PATH)/cache/$(GOPKG)
+	touch $@
+
+build: source_path dependencies
 	$(MAKE) -C prometheus build
 	$(MAKE) -C examples build
 
+dependencies: source_path $(GOCC)
+	$(GO) get github.com/matttproud/gocheck
+
 test: build
 	$(MAKE) -C prometheus test
 	$(MAKE) -C examples test
@@ -28,18 +67,24 @@ advice: test
 	$(MAKE) -C examples advice
 
 format:
-	find . -iname '*.go' -exec gofmt -w -s=true '{}' ';'
+	find . -iname '*.go' | grep -v './.build/' | xargs -n1 -P1 $(GOFMT) -w -s=true
 
 search_index:
 	godoc -index -write_index -index_files='search_index'
 
+# source_path is responsible for ensuring that the builder has not done anything
+# stupid like working on Prometheus outside of ${GOPATH}.
+source_path:
+	-[ -d "$(FULL_GOPATH)" ] || { mkdir -vp $(FULL_GOPATH_BASE) ; ln -s "$(PWD)" "$(FULL_GOPATH)" ; }
+	[ -d "$(FULL_GOPATH)" ]
+
 documentation: search_index
 	godoc -http=:6060 -index -index_files='search_index'
 
 clean:
 	$(MAKE) -C examples clean
-	rm -f $(MAKE_ARTIFACTS)
+	rm -rf $(MAKE_ARTIFACTS)
 	find . -iname '*~' -exec rm -f '{}' ';'
 	find . -iname '*#' -exec rm -f '{}' ';'
 
-.PHONY: advice build clean documentation format test
+.PHONY: advice build clean documentation format source_path test

Makefile.TRAVIS

@@ -1,31 +0,0 @@
-# Copyright 2013 Prometheus Team
-# 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.
-
-PROMETHEUS_TARGET := "${GOPATH}/src/github.com/prometheus"
-
-all: test
-
-preparation:
-	mkdir -vp $(PROMETHEUS_TARGET)
-	ln -sf "$(PWD)" $(PROMETHEUS_TARGET)
-
-dependencies:
-	go get code.google.com/p/goprotobuf/proto
-	go get github.com/matttproud/gocheck
-	go get github.com/matttproud/golang_protobuf_extensions/ext
-	go get github.com/prometheus/client_model/go
-
-test: dependencies preparation
-	$(MAKE) test
-
-.PHONY: dependencies preparation test

examples/delegator/Makefile

@@ -18,13 +18,13 @@ all: test
 build: delegator
 
 delegator:
-	go build .
+	$(GO) build .
 
 test: build
-	go test . $(GO_TEST_FLAGS)
+	$(GO) test . $(GO_TEST_FLAGS)
 
 advice:
-	go tool vet .
+	$(GO) tool vet .
 
 clean:
 	rm -f $(MAKE_ARTIFACTS)

examples/random/Makefile

@@ -18,13 +18,13 @@ all: test
 build: random
 
 random:
-	go build .
+	$(GO) build .
 
 test: build
-	go test . $(GO_TEST_FLAGS)
+	$(GO) test . $(GO_TEST_FLAGS)
 
 advice:
-	go tool vet .
+	$(GO) tool vet .
 
 clean:
 	rm -f $(MAKE_ARTIFACTS)

examples/simple/Makefile

@@ -18,13 +18,13 @@ all: test
 build: simple
 
 simple:
-	go build .
+	$(GO) build .
 
 test: build
-	go test . $(GO_TEST_FLAGS)
+	$(GO) test . $(GO_TEST_FLAGS)
 
 advice:
-	go tool vet .
+	$(GO) tool vet .
 
 clean:
 	rm -f $(MAKE_ARTIFACTS)

prometheus/Makefile

@@ -13,13 +13,16 @@
 
 all: test
 
-build:
-	go build ./...
+build: dependencies
+	$(GO) build ./...
+
+dependencies: $(GOCC)
+	$(GO) get -d
 
 test: build
-	go test ./... $(GO_TEST_FLAGS)
+	$(GO) test ./... $(GO_TEST_FLAGS)
 
 advice:
-	go tool vet .
+	$(GO) tool vet .
 
-.PHONY: advice build test
+.PHONY: advice build dependencies test