Makefile: allow overriding package name
With this patch applied, the package-name in the `--version` output can be overridden;
make PACKAGE=containerd.io binaries
./bin/containerd --version
containerd containerd.io v1.2.0-329-ga15b6e20.m a15b6e2097c48b632dbdc63254bad4c62b69e709.m
@@ -22,6 +22,7 @@ DESTDIR=/usr/local
# Used to populate variables in version package.
VERSION=$(shell git describe --match 'v[0-9]*' --dirty='.m' --always)
REVISION=$(shell git rev-parse HEAD)$(shell if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi)
+PACKAGE=github.com/containerd/containerd
ifneq "$(strip $(shell command -v go 2>/dev/null))" ""
GOOS ?= $(shell go env GOOS)
@@ -90,8 +91,8 @@ endif
GO_BUILDTAGS ?= seccomp apparmor
GO_BUILDTAGS += ${DEBUG_TAGS}
GO_TAGS=$(if $(GO_BUILDTAGS),-tags "$(GO_BUILDTAGS)",)
-GO_LDFLAGS=-ldflags '-X $(PKG)/version.Version=$(VERSION) -X $(PKG)/version.Revision=$(REVISION) -X $(PKG)/version.Package=$(PKG) $(EXTRA_LDFLAGS)'
-SHIM_GO_LDFLAGS=-ldflags '-X $(PKG)/version.Version=$(VERSION) -X $(PKG)/version.Revision=$(REVISION) -X $(PKG)/version.Package=$(PKG) -extldflags "-static" $(EXTRA_LDFLAGS)'
+GO_LDFLAGS=-ldflags '-X $(PKG)/version.Version=$(VERSION) -X $(PKG)/version.Revision=$(REVISION) -X $(PKG)/version.Package=$(PACKAGE) $(EXTRA_LDFLAGS)'
+SHIM_GO_LDFLAGS=-ldflags '-X $(PKG)/version.Version=$(VERSION) -X $(PKG)/version.Revision=$(REVISION) -X $(PKG)/version.Package=$(PACKAGE) -extldflags "-static" $(EXTRA_LDFLAGS)'
#Replaces ":" (*nix), ";" (windows) with newline for easy parsing
GOPATHS=$(shell echo ${GOPATH} | tr ":" "\n" | tr ";" "\n")
