Add a building doc and Makefile.

BUILDING.md

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+# Building Drone CI
+
+## Install Go Dependencies
+
+ $ go get github.com/drone/drone-ui/dist
+ $ go get github.com/golang/protobuf/proto
+ $ go get golang.org/x/net/context
+
+## Server
+
+If you plan on running the server binary in a Docker container,
+run `export GOOS=linux GOARCH=amd64` first.
+
+```
+go build \
+ -o release/drone-server \
+ -ldflags "-extldflags -static -X github.com/drone/drone/version.VersionDev=build.$(date +'%s')" \
+ github.com/drone/drone/cmd/drone-server
+```
+
+## Agent
+
+```
+GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build \
+ -o release/drone-agent \
+ github.com/drone/drone/cmd/drone-agent
+```
+
+## Docker Images
+
+Ensure the binaries have been built first (see above).
+
+Build the server:
+
+ $ docker build -t drone-server .
+
+Build the agent:
+
+ $ docker build -t drone-agent -f Dockerfile.agent .

Makefile

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+PACKAGE = github.com/drone/drone
+DATE ?= $(shell date +%FT%T%z)
+VERSION ?= $(shell git describe --tags --always --dirty --match=v* 2> /dev/null || \
+ cat $(CURDIR)/.version 2> /dev/null || echo v0)
+GOPATH = $(CURDIR)/.gopath~
+BIN = $(GOPATH)/bin
+BASE = $(GOPATH)/src/$(PACKAGE)
+PKGS = $(or $(PKG),$(shell cd $(BASE) && env GOPATH=$(GOPATH) $(GO) list ./... | grep -v "^$(PACKAGE)/vendor/"))
+TESTPKGS = $(shell env GOPATH=$(GOPATH) $(GO) list -f '{{ if or .TestGoFiles .XTestGoFiles }}{{ .ImportPath }}{{ end }}' $(PKGS))
+
+GO = go
+GODOC = godoc
+GOFMT = gofmt
+GLIDE = glide
+TIMEOUT = 15
+V = 0
+Q = $(if $(filter 1,$V),,@)
+M = $(shell printf "\033[34;1m▶\033[0m")
+
+.PHONY: all
+all: server agent | $(BASE) ; @ ## Build server and agent binaries
+
+$(BASE): ; $(info $(M) setting GOPATH…)
+ @mkdir -p $(dir $@)
+ @ln -sf $(CURDIR) $@
+
+# Drone server
+
+.PHONY: server
+server: fmt depend | $(BASE) ; $(info $(M) building server executable…) @ ## Build server binary
+ $Q cd $(BASE) && $(GO) build \
+ -tags release \
+ -ldflags '-X $(PACKAGE)/cmd.Version=$(VERSION) -X $(PACKAGE)/cmd.BuildDate=$(DATE)' \
+ -o release/drone-server github.com/drone/drone/cmd/drone-server
+
+# Drone Agent
+
+.PHONY: agent
+agent: fmt depend | $(BASE) ; $(info $(M) building agent executable…) @ ## Build agent binary
+ $Q cd $(BASE) && CGO_ENABLED=0 $(GO) build \
+ -tags release \
+ -ldflags '-X $(PACKAGE)/cmd.Version=$(VERSION) -X $(PACKAGE)/cmd.BuildDate=$(DATE)' \
+ -o release/drone-agent github.com/drone/drone/cmd/drone-agent
+
+# Basic dependency management
+
+.PHONY: depend
+depend: $(BASE) ; $(info $(M) installing dependencies…) @ ## Install dependencies
+ @go get github.com/drone/drone-ui/dist
+ @go get github.com/golang/protobuf/proto
+ @go get golang.org/x/net/context
+
+# Tools
+
+GOLINT = $(BIN)/golint
+$(BIN)/golint: | $(BASE) ; $(info $(M) building golint…)
+ $Q go get github.com/golang/lint/golint
+
+GOCOVMERGE = $(BIN)/gocovmerge
+$(BIN)/gocovmerge: | $(BASE) ; $(info $(M) building gocovmerge…)
+ $Q go get github.com/wadey/gocovmerge
+
+GOCOV = $(BIN)/gocov
+$(BIN)/gocov: | $(BASE) ; $(info $(M) building gocov…)
+ $Q go get github.com/axw/gocov/...
+
+GOCOVXML = $(BIN)/gocov-xml
+$(BIN)/gocov-xml: | $(BASE) ; $(info $(M) building gocov-xml…)
+ $Q go get github.com/AlekSi/gocov-xml
+
+GO2XUNIT = $(BIN)/go2xunit
+$(BIN)/go2xunit: | $(BASE) ; $(info $(M) building go2xunit…)
+ $Q go get github.com/tebeka/go2xunit
+
+# Tests
+
+TEST_TARGETS := test-default test-bench test-short test-verbose test-race
+.PHONY: $(TEST_TARGETS) test-xml check test tests
+test-bench: ARGS=-run=__absolutelynothing__ -bench=. ## Run benchmarks
+test-short: ARGS=-short ## Run only short tests
+test-verbose: ARGS=-v ## Run tests in verbose mode with coverage reporting
+test-race: ARGS=-race ## Run tests with race detector
+$(TEST_TARGETS): NAME=$(MAKECMDGOALS:test-%=%)
+$(TEST_TARGETS): test
+check test tests: fmt lint | $(BASE) ; $(info $(M) running $(NAME:%=% )tests…) @ ## Run tests
+ $Q cd $(BASE) && $(GO) test -timeout $(TIMEOUT)s $(ARGS) $(TESTPKGS)
+
+test-xml: fmt lint | $(BASE) $(GO2XUNIT) ; $(info $(M) running $(NAME:%=% )tests…) @ ## Run tests with xUnit output
+ $Q cd $(BASE) && 2>&1 $(GO) test -timeout 20s -v $(TESTPKGS) | tee test/tests.output
+ $(GO2XUNIT) -fail -input test/tests.output -output test/tests.xml
+
+COVERAGE_MODE = atomic
+COVERAGE_PROFILE = $(COVERAGE_DIR)/profile.out
+COVERAGE_XML = $(COVERAGE_DIR)/coverage.xml
+COVERAGE_HTML = $(COVERAGE_DIR)/index.html
+.PHONY: test-coverage test-coverage-tools
+test-coverage-tools: | $(GOCOVMERGE) $(GOCOV) $(GOCOVXML)
+test-coverage: COVERAGE_DIR := $(CURDIR)/test/coverage.$(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+test-coverage: fmt lint test-coverage-tools | $(BASE) ; $(info $(M) running coverage tests…) @ ## Run coverage tests
+ $Q mkdir -p $(COVERAGE_DIR)/coverage
+ $Q cd $(BASE) && for pkg in $(TESTPKGS); do \
+ $(GO) test \
+ -coverpkg=$$($(GO) list -f '{{ join .Deps "\n" }}' $$pkg | \
+ grep '^$(PACKAGE)/' | grep -v '^$(PACKAGE)/vendor/' | \
+ tr '\n' ',')$$pkg \
+ -covermode=$(COVERAGE_MODE) \
+ -coverprofile="$(COVERAGE_DIR)/coverage/`echo $$pkg | tr "/" "-"`.cover" $$pkg ;\
+ done
+ $Q $(GOCOVMERGE) $(COVERAGE_DIR)/coverage/*.cover > $(COVERAGE_PROFILE)
+ $Q $(GO) tool cover -html=$(COVERAGE_PROFILE) -o $(COVERAGE_HTML)
+ $Q $(GOCOV) convert $(COVERAGE_PROFILE) | $(GOCOVXML) > $(COVERAGE_XML)
+
+.PHONY: lint
+lint: $(BASE) $(GOLINT) ; $(info $(M) running golint…) @ ## Run golint
+ $Q cd $(BASE) && ret=0 && for pkg in $(PKGS); do \
+ test -z "$$($(GOLINT) $$pkg | tee /dev/stderr)" || ret=1 ; \
+ done ; exit $$ret
+
+.PHONY: fmt
+fmt: ; $(info $(M) running gofmt…) @ ## Run gofmt on all source files
+ @ret=0 && for d in $$($(GO) list -f '{{.Dir}}' ./... | grep -v /vendor/); do \
+ $(GOFMT) -l -w $$d/*.go || ret=$$? ; \
+ done ; exit $$ret
+
+# Misc
+
+.PHONY: clean
+clean: ; $(info $(M) cleaning…) @ ## Cleanup everything
+ @rm -rf $(GOPATH)
+ @rm -rf bin
+ @rm -rf test/tests.* test/coverage.*
+
+.PHONY: help
+help:
+ @grep -E '^[ a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
+ awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-15s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: version
+version:
+ @echo $(VERSION)