Improve Makefile, add multiple targets

Adds targets to do things like:
* build
* install
* vendor

Signed-off-by: Eli Uriegas <eli.uriegas@docker.com>

.gitignore

@@ -1,3 +1,3 @@
-vendor/
 _vendor-*/
-dist/
+dist/
+bin/

Makefile

@@ -1,7 +1,32 @@
-.PHONY: default clean
+DEP="$(shell go env GOPATH)/bin/dep"
+PREFIX?=/usr/local/bin
+LDFLAGS:=-ldflags '-X main.version=$(shell git rev-parse --abbrev-ref HEAD) -X main.commit=$(shell git rev-parse HEAD) -X "main.goversion=$(shell go version)"'
 
-default: 
-	go install -ldflags '-X main.version=$(shell git rev-parse --abbrev-ref HEAD) -X main.commit=$(shell git rev-parse HEAD) -X "main.goversion=$(shell go version)"' github.com/fossas/fossa-cli/cmd/fossa
+all: build
 
+$(DEP): ## Grab golang/dep utility
+	go get github.com/golang/dep/cmd/dep
+
+.PHONY: build
+build: bin/fossa
+
+bin/fossa:
+	mkdir -p $$(dirname $@)
+	go build -o $@ $(LDFLAGS) github.com/fossas/fossa-cli/cmd/fossa
+
+$(PREFIX)/fossa: bin/fossa
+	mv $< $@
+
+vendor: $(DEP)
+	$< ensure -v -update
+
+.PHONY: install
+install: $(PREFIX)/fossa
+
+.PHONY: uninstall
+uninstall:
+	rm $(PREFIX)/fossa
+
+.PHONY: clean
 clean:
-	rm -f $(GOPATH)/bin/fossa
+	rm -f bin/fossa