all: proxy files: ls Dockerfile *.go > files find libproxy >> files printf -- '-C\n..\n' >> files (cd .. && find vendor) >> files proxy: Dockerfile $(wildcard *.go libproxy/*.go) ../vendor/manifest files tar cf - -T files | docker build -t proxy:build - docker run --rm --net=none proxy:build | tar xf - clean: rm -rf proxy files .DELETE_ON_ERROR: