how to ignore the vendor directory from dependency repos?

[chenchun]

My main repo depens on k8s repo, both my repo and k8s depens on glog. If I don't delete the vendor directory in k8s repo, eg. vendor/k8s.io/kubernetes/vendor/, my program will run into the following error:

./galaxy flag redefined: log_dir
panic: ./galaxy flag redefined: log_dir

goroutine 1 [running]:
panic(0x85c140, 0xc82024a470)
	/usr/local/go/src/runtime/panic.go:481 +0x3e6
flag.(*FlagSet).Var(0xc820058060, 0x7fa71593c1e8, 0xc82024a420, 0x9f2920, 0x7, 0xa90440, 0x2f)
	/usr/local/go/src/flag/flag.go:776 +0x454
flag.(*FlagSet).StringVar(0xc820058060, 0xc82024a420, 0x9f2920, 0x7, 0x0, 0x0, 0xa90440, 0x2f)
	/usr/local/go/src/flag/flag.go:679 +0xc7
flag.(*FlagSet).String(0xc820058060, 0x9f2920, 0x7, 0x0, 0x0, 0xa90440, 0x2f, 0xc82024a410)
	/usr/local/go/src/flag/flag.go:692 +0x83
flag.String(0x9f2920, 0x7, 0x0, 0x0, 0xa90440, 0x2f, 0x7eca7a)
	/usr/local/go/src/flag/flag.go:699 +0x5f
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/golang/glog.init()
	/go/src/git.code.oa.com/gaiastack/galaxy/go/src/git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/golang/glog/glog_file.go:41 +0x13e
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/iptables.init()
	/go/src/git.code.oa.com/gaiastack/galaxy/go/src/git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/iptables/save_restore.go:108 +0x5e
git.code.oa.com/gaiastack/galaxy/pkg/network/portmapping.init()
	/go/src/git.code.oa.com/gaiastack/galaxy/go/src/git.code.oa.com/gaiastack/galaxy/pkg/network/portmapping/iptables.go:269 +0x63
git.code.oa.com/gaiastack/galaxy/pkg/galaxy.init()
	/go/src/git.code.oa.com/gaiastack/galaxy/go/src/git.code.oa.com/gaiastack/galaxy/pkg/galaxy/server.go:161 +0x9c
main.init()
	/go/src/git.code.oa.com/gaiastack/galaxy/go/src/git.code.oa.com/gaiastack/galaxy/cmd/galaxy/galaxy.go:27 +0x45

Here is the output of compiling. glog linked twice from git.code.oa.com/gaiastack/galaxy/vendor/github.com/golang/glog and git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/golang/glog.

Building galaxy
git.code.oa.com/gaiastack/galaxy/vendor/github.com/containernetworking/cni/pkg/types
git.code.oa.com/gaiastack/galaxy/vendor/github.com/containernetworking/cni/pkg/version
git.code.oa.com/gaiastack/galaxy/vendor/github.com/containernetworking/cni/pkg/invoke
git.code.oa.com/gaiastack/galaxy/vendor/github.com/containernetworking/cni/pkg/skel
git.code.oa.com/gaiastack/galaxy/pkg/network/flannel
git.code.oa.com/gaiastack/galaxy/vendor/github.com/golang/glog
git.code.oa.com/gaiastack/galaxy/pkg/api/cniutil
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/distribution/digest
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/distribution/reference
git.code.oa.com/gaiastack/galaxy/vendor/github.com/Sirupsen/logrus
git.code.oa.com/gaiastack/galaxy/vendor/github.com/opencontainers/runc/libcontainer/user
git.code.oa.com/gaiastack/galaxy/vendor/golang.org/x/net/proxy
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/go-connections/sockets
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/client/transport
git.code.oa.com/gaiastack/galaxy/vendor/golang.org/x/net/context
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/client/transport/cancellable
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/blkiodev
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/strslice
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/go-connections/nat
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/go-units
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/container
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/versions
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/filters
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/network
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/registry
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/reference
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/types/time
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/go-connections/tlsconfig
git.code.oa.com/gaiastack/galaxy/vendor/github.com/docker/engine-api/client
git.code.oa.com/gaiastack/galaxy/pkg/api/docker
git.code.oa.com/gaiastack/galaxy/pkg/api/k8s
git.code.oa.com/gaiastack/galaxy/pkg/api/galaxy
git.code.oa.com/gaiastack/galaxy/vendor/github.com/vishvananda/netns
git.code.oa.com/gaiastack/galaxy/vendor/github.com/vishvananda/netlink/nl
git.code.oa.com/gaiastack/galaxy/vendor/github.com/vishvananda/netlink
git.code.oa.com/gaiastack/galaxy/pkg/flags
git.code.oa.com/gaiastack/galaxy/pkg/wait
git.code.oa.com/gaiastack/galaxy/pkg/gc
git.code.oa.com/gaiastack/galaxy/pkg/network/kernel
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/godbus/dbus
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/dbus
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/exec
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/coreos/go-semver/semver
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/vendor/github.com/golang/glog
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/sets
git.code.oa.com/gaiastack/galaxy/vendor/k8s.io/kubernetes/pkg/util/iptables
git.code.oa.com/gaiastack/galaxy/pkg/network/portmapping
git.code.oa.com/gaiastack/galaxy/pkg/api/apiswitch
git.code.oa.com/gaiastack/galaxy/pkg/utils/httputils
git.code.oa.com/gaiastack/galaxy/pkg/network/remote
git.code.oa.com/gaiastack/galaxy/vendor/github.com/emicklei/go-restful/log
git.code.oa.com/gaiastack/galaxy/vendor/github.com/emicklei/go-restful
git.code.oa.com/gaiastack/galaxy/pkg/galaxy
git.code.oa.com/gaiastack/galaxy/pkg/signal
git.code.oa.com/gaiastack/galaxy/cmd/galaxy

[chenchun]

But if I delete vendor/k8s.io/kubernetes/vendor, k8s repo becomes dirty.

chenchun:galaxy (open-2.0.2) $ rm -rf vendor/k8s.io/kubernetes/vendor/
chenchun:galaxy (open-2.0.2) $ git st
git On branch open-2.0.2
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)
  (commit or discard the untracked or modified content in submodules)

	modified:   vendor/k8s.io/kubernetes (modified content)

[chenchun]

I just figure out a way

rm -rf vendor/k8s.io/kubernetes/vendor
git update-index --assume-unchanged vendor/k8s.io/kubernetes
# track the changes again before update a dependency
git update-index --no-assume-unchanged  vendor/k8s.io/kubernetes