Add e2e tests

vendor/google.golang.org/grpc/vet.sh

@@ -13,11 +13,8 @@ die() {
 if git status --porcelain | read; then
   die "Uncommitted or untracked files found; commit changes first"
 fi
-# Undo any edits made by this script.
-cleanup() {
-  git reset --hard HEAD
-}
-trap cleanup EXIT
+
+PATH="$GOPATH/bin:$GOROOT/bin:$PATH"
 
 # Check proto in manual runs or cron runs.
 if [[ "$TRAVIS" != "true" || "$TRAVIS_EVENT_TYPE" = "cron" ]]; then
@@ -36,10 +33,12 @@ if [ "$1" = "-install" ]; then
   if [[ "$check_proto" = "true" ]]; then
     if [[ "$TRAVIS" = "true" ]]; then
       PROTOBUF_VERSION=3.3.0
-      cd /home/travis
-      wget https://github.com/google/protobuf/releases/download/v$PROTOBUF_VERSION/$basename-linux-x86_64.zip
-      unzip $basename-linux-x86_64.zip
+      PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip
+      pushd /home/travis
+      wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME}
+      unzip ${PROTOC_FILENAME}
       bin/protoc --version
+      popd
     elif ! which protoc > /dev/null; then
       die "Please install protoc into your path"
     fi
@@ -54,18 +53,23 @@ gofmt -s -d -l . 2>&1 | tee /dev/stderr | (! read)
 goimports -l . 2>&1 | tee /dev/stderr | (! read)
 golint ./... 2>&1 | (grep -vE "(_mock|_string|\.pb)\.go:" || true) | tee /dev/stderr | (! read)
 
+# Undo any edits made by this script.
+cleanup() {
+  git reset --hard HEAD
+}
+trap cleanup EXIT
+
 # Rewrite golang.org/x/net/context -> context imports (see grpc/grpc-go#1484).
 # TODO: Remove this mangling once "context" is imported directly (grpc/grpc-go#711).
 git ls-files "*.go" | xargs sed -i 's:"golang.org/x/net/context":"context":'
 set +o pipefail
 # TODO: Stop filtering pb.go files once golang/protobuf#214 is fixed.
-# TODO: Remove clientconn exception once go1.6 support is removed.
-go tool vet -all . 2>&1 | grep -vE 'clientconn.go:.*cancel' | grep -vF '.pb.go:' | tee /dev/stderr | (! read)
+go tool vet -all . 2>&1 | grep -vF '.pb.go:' | tee /dev/stderr | (! read)
 set -o pipefail
 git reset --hard HEAD
 
 if [[ "$check_proto" = "true" ]]; then
-  PATH=/home/travis/bin:$PATH make proto && \
+  PATH="/home/travis/bin:$PATH" make proto && \
     git status --porcelain 2>&1 | (! read) || \
     (git status; git --no-pager diff; exit 1)
 fi