test: don't use hardcoded package lists for testing

test

@@ -27,9 +27,11 @@ mkdir -p $GOPATH
 ln -s ${PWD}/cmd/vendor $GOPATH/src
 
 # Hack: gofmt ./ will recursively check the .git directory. So use *.go for gofmt.
-PKGS=`ls pkg/*/*go  | cut -f1,2 -d/ | sort | uniq`
-TESTABLE_AND_FORMATTABLE="auth client clientv3 discovery error etcdctl/ctlv2 etcdctl/ctlv3 etcdmain etcdserver etcdserver/auth etcdserver/api/v2http etcdserver/api/v2http/httptypes etcdserver/api/v3rpc etcdserver/api/v3rpc/rpctypes $PKGS proxy/httpproxy proxy/tcpproxy raft snap mvcc mvcc/backend store version wal rafthttp"
-FORMATTABLE="$TESTABLE_AND_FORMATTABLE *.go etcdctl/ integration clientv3/integration e2e alarm"
+IGNORE_PKGS="(cmd|vendor|etcdserverpb|rafttest)"
+INTEGRATION_PKGS="(integration|e2e|contrib|functional-tester)"
+TEST_PKGS=`find . -name \*_test.go | while read a; do dirname $a; done | sort | uniq | egrep -v "$IGNORE_PKGS" | sed "s|\./||g"`
+FORMATTABLE=`find . -name \*.go | while read a; do echo $(dirname $a)/"*.go"; done | sort | uniq | egrep -v "$IGNORE_PKGS" | sed "s|\./||g"`
+TESTABLE_AND_FORMATTABLE=`echo "$TEST_PKGS" | egrep -v "$INTEGRATION_PKGS"`
 
 # user has not provided PKG override
 if [ -z "$PKG" ]; then