internal/kokoro: don't use GOPATH, send logs to Build Cop Bot

internal/kokoro/test.sh

@@ -13,22 +13,39 @@ go version
 
 # Set $GOPATH
 export GOPATH="$HOME/go"
-export GAX_HOME=$GOPATH/src/github.com/googleapis/gax-go
 export PATH="$GOPATH/bin:$PATH"
 export GO111MODULE=on
-mkdir -p $GAX_HOME
-
-# Move code into $GOPATH and get dependencies
-git clone . $GAX_HOME
-cd $GAX_HOME
 
 try3() { eval "$*" || eval "$*" || eval "$*"; }
 
 # All packages, including +build tools, are fetched.
 try3 go mod download
 ./internal/kokoro/vet.sh
-go test -race -v . 2>&1 | tee $KOKORO_ARTIFACTS_DIR/$KOKORO_GERRIT_CHANGE_NUMBER.txt
+
+go get github.com/jstemmer/go-junit-report
+
+set +e
+
+go test -race -v . 2>&1 | tee sponge_log.log
+cat sponge_log.log | go-junit-report -set-exit-code > sponge_log.xml
+exit_code=$?
 
 cd v2
+set -e
 try3 go mod download
-go test -race -v . 2>&1 | tee $KOKORO_ARTIFACTS_DIR/$KOKORO_GERRIT_CHANGE_NUMBER.txt
+set +e
+
+go test -race -v . 2>&1 | tee sponge_log.log
+cat sponge_log.log | go-junit-report -set-exit-code > sponge_log.xml
+exit_code=$(($exit_code+$?))
+
+# Send logs to the Build Cop Bot for continuous builds.
+# TODO: uncomment when this works for the PR.
+# if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]]; then
+  cd ..
+  chmod +x $KOKORO_GFILE_DIR/linux_amd64/buildcop
+  $KOKORO_GFILE_DIR/linux_amd64/buildcop \
+    -repo=googleapis/gax-go # TODO delete after PR.
+# fi
+
+exit $exit_code