build: various cleanups

This reuses some variables and moves the PHONY target above each of the
dependant targets.

Author: crawford

Makefile

@@ -1,6 +1,3 @@
-export CGO_ENABLED:=0
-export GOPATH=$(shell pwd)/gopath
-
 # kernel-style V=1 build verbosity
 ifeq ("$(origin V)", "command line")
        BUILD_VERBOSE = $(V)
@@ -13,18 +10,20 @@ else
 endif
 
 VERSION=$(shell git describe --dirty)
-LD_FLAGS="-w -X github.com/coreos/container-linux-config-transpiler/internal/version.Raw=$(VERSION)"
-
 REPO=github.com/coreos/container-linux-config-transpiler
+LD_FLAGS="-w -X $(REPO)/internal/version.Raw=$(VERSION)"
 
-all: build
+export GOPATH=$(shell pwd)/gopath
+export CGO_ENABLED:=0
+
+.PHONY: all
+all: bin/ct
 
 gopath:
 	$(Q)mkdir -p gopath/src/github.com/coreos
 	$(Q)ln -s ../../../.. gopath/src/$(REPO)
 
-build: bin/ct
-
+.PHONY: test
 test:
 	$(Q)./test
 
@@ -33,6 +32,7 @@ vendor:
 	$(Q)glide update --strip-vendor
 	$(Q)glide-vc --use-lock-file --no-tests --only-code
 
+.PHONY: clean
 clean:
 	$(Q)rm -rf bin
 
@@ -48,5 +48,3 @@ bin/ct-%-x86_64-pc-windows-gnu.exe: GOARGS = GOOS=windows GOARCH=amd64
 
 bin/%: | gopath
 	$(Q)$(GOARGS) go build -o $@ -ldflags $(LD_FLAGS) $(REPO)/internal
-
-.PHONY: all build clean test