Faster dev builds (#2924)

This patch runs 'go install' instead of gox which runs 'go build' for
'make dev' and copies the binary into ./bin and ./pkg/${GOOS}_${GOARCH}
to mimick the previous behavior. This reduces the roundtrip times
for a dev build from 11 sec to 500ms if there weren't any changes.

GNUmakefile

@@ -7,6 +7,17 @@ GOTOOLS = \
 TEST ?= ./...
 GOTAGS ?= consul
 GOFILES ?= $(shell go list $(TEST) | grep -v /vendor/)
+GOOS=$(shell go env GOOS)
+GOARCH=$(shell go env GOARCH)
+
+# Get the git commit
+GIT_COMMIT=$(shell git rev-parse --short HEAD)
+GIT_DIRTY=$(shell test -n "`git status --porcelain`" && echo "+CHANGES" || true)
+GIT_DESCRIBE=$(shell git describe --tags --always)
+GIT_IMPORT=github.com/hashicorp/consul/version
+GOLDFLAGS=-X $(GIT_IMPORT).GitCommit=$(GIT_COMMIT)$(GIT_DIRTY) -X $(GIT_IMPORT).GitDescribe=$(GIT_DESCRIBE)
+
+export GOLDFLAGS
 
 # all builds binaries for all targets
 all: bin
@@ -16,8 +27,11 @@ bin: tools
 	@GOTAGS='$(GOTAGS)' sh -c "'$(CURDIR)/scripts/build.sh'"
 
 # dev creates binaries for testing locally - these are put into ./bin and $GOPATH
-dev: format
-	@CONSUL_DEV=1 GOTAGS='$(GOTAGS)' sh -c "'$(CURDIR)/scripts/build.sh'"
+dev:
+	mkdir -p pkg/$(GOOS)_$(GOARCH)
+	go install -ldflags '$(GOLDFLAGS)' -tags '$(GOTAGS)'
+	cp $(GOPATH)/bin/consul bin
+	cp $(GOPATH)/bin/consul pkg/$(GOOS)_$(GOARCH)
 
 # dist builds binaries for all platforms and packages them for distribution
 dist:

scripts/build.sh

@@ -13,12 +13,6 @@ DIR="$( cd -P "$( dirname "$SOURCE" )/.." && pwd )"
 # Change into that directory
 cd "$DIR"
 
-# Get the git commit
-GIT_COMMIT="$(git rev-parse --short HEAD)"
-GIT_DIRTY="$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)"
-GIT_DESCRIBE="$(git describe --tags --always)"
-GIT_IMPORT="github.com/hashicorp/consul/version"
-
 # Determine the arch/os combos we're building for
 XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
 XC_OS=${XC_OS:-"solaris darwin freebsd linux windows"}
@@ -41,7 +35,7 @@ echo "==> Building..."
     -os="${XC_OS}" \
     -arch="${XC_ARCH}" \
     -osarch="!darwin/arm" \
-    -ldflags "-X ${GIT_IMPORT}.GitCommit='${GIT_COMMIT}${GIT_DIRTY}' -X ${GIT_IMPORT}.GitDescribe='${GIT_DESCRIBE}'" \
+    -ldflags "${GOLDFLAGS}" \
     -output "pkg/{{.OS}}_{{.Arch}}/consul" \
     -tags="${GOTAGS}" \
     .