Improve shell scripts

misc/make-deps.sh

@@ -7,8 +7,8 @@ if env | grep -q '^TRAVIS=true$'; then
 fi
 
 if [ $travis -eq 0 ]; then
-	YUM=`which yum`
-	APT=`which apt-get`
+	YUM=`which yum 2>/dev/null`
+	APT=`which apt-get 2>/dev/null`
 	if [ -z "$YUM" -a -z "$APT" ]; then
 		echo "The package managers can't be found."
 		exit 1
@@ -34,5 +34,6 @@ cd -
 rm -rf etcd	# clean up to avoid failing on upstream gofmt errors
 
 go get ./...	# get all the go dependencies
-go get golang.org/x/tools/cmd/vet # add in `go vet` for travis
+[ -e "$GOBIN/mgmt" ] && rm -f "$GOBIN/mgmt"	# the `go get` version has no -X
+go get golang.org/x/tools/cmd/vet	# add in `go vet` for travis
 go get golang.org/x/tools/cmd/stringer	# for automatic stringer-ing