Add install_bazel.sh script to make it easy to install the correctly needed version of Bazel.

oss_scripts/install_bazel.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+set -e  # fail and exit on any command erroring
+set -x  # print evaluated commands
+
+# Read the bazel version from the path; slowly moving up parents
+while [[ $PWD != / && -z $(find ~+/ -maxdepth 1 -type f -name .bazelversion) ]]
+do cd ..; done
+BAZEL_VERSION=$(<.bazelversion)
+if [[ -z "$BAZEL_VERSION" ]]; then exit 1; fi
+
+# If (due to e.g., $PATH settings), bazel is actually running bazelisk,
+# https://github.com/bazelbuild/bazelisk, make sure it downloads the bazel
+# version we want (not the latest one, which we haven't tested yet).
+export USE_BAZEL_VERSION=${BAZEL_VERSION}
+
+# Install the given bazel version.
+function update_bazel_version {
+  local BAZEL_VERSION=$1
+  local BAZEL_URL=https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}
+  case "$(uname -s)" in
+    MSYS_NT*)
+      # Windows is a special case: there is no installer, just a big .exe, see
+      # https://docs.bazel.build/versions/master/install-windows.html
+      local INSTALL_DIR=`pwd`/bazel-${BAZEL_VERSION}
+      mkdir -p ${INSTALL_DIR}
+      wget -q ${BAZEL_URL}/bazel-${BAZEL_VERSION}-windows-x86_64.exe \
+        -O ${INSTALL_DIR}/bazel.exe
+      PATH=${INSTALL_DIR}:$PATH
+      return
+      ;;
+    Darwin)
+      echo "Delete bazel install cache to address http://b/161389448"
+      rm -fr /var/tmp/_bazel_kbuilder/install/9be5dadb2a2b38082dbe665bf2db6464
+      local OS_TOKEN=darwin
+      ;;
+    Linux)
+      local OS_TOKEN=linux
+      ;;
+    *)
+      die "Unknown OS: $(uname -s)"
+      ;;
+  esac
+  local BAZEL_INSTALLER=bazel-${BAZEL_VERSION}-installer-${OS_TOKEN}-x86_64.sh
+  rm -f ${BAZEL_INSTALLER}
+  curl -fSsL -O ${BAZEL_URL}/${BAZEL_INSTALLER}
+  chmod +x ${BAZEL_INSTALLER}
+
+  # Due to --user, the installer puts the bazel binary into $HOME/bin (where we
+  # have access rights).  We add that at the top of our $PATH.
+  ./${BAZEL_INSTALLER} --user
+  PATH=$HOME/bin:$PATH
+  rm -f ${BAZEL_INSTALLER}
+}
+
+# First check if new version of Bazel needs to be installed.
+# Install different bazel if needed
+installed_bazel_version=$(bazel version | grep label | sed -e 's/.*: //')
+if [ "$installed_bazel_version" == "$BAZEL_VERSION" ]; then
+  echo "Bazel version ${BAZEL_VERSION} is already correctly installed."
+else
+  update_bazel_version ${BAZEL_VERSION}
+  which bazel
+  bazel version
+fi

oss_scripts/run_build.sh

@@ -13,6 +13,16 @@ fi
 # Run configure.
 source oss_scripts/configure.sh
 
+# Verify correct version of Bazel
+installed_bazel_version=$(bazel version | grep label | sed -e 's/.*: //')
+tf_bazel_version=$(cat .bazelversion)
+if [ "$installed_bazel_version" != "$tf_bazel_version" ]; then
+  echo "Incorrect version of Bazel installed."
+  echo "Version $tf_bazel_version should be installed, but found version ${installed_bazel_version}."
+  echo "Run oss_scripts/install_bazel.sh or manually install the correct version."
+  exit 1
+fi
+
 # Set tensorflow version
 if [[ $osname != "Darwin" ]] || [[ ! $(sysctl -n machdep.cpu.brand_string) =~ "Apple" ]]; then
   source oss_scripts/prepare_tf_dep.sh

oss_scripts/run_tests.sh

@@ -4,4 +4,20 @@ set -x  # print commands as they are executed
 set -e  # fail and exit on any command erroring
 
 ./oss_scripts/configure.sh
+
+# Verify correct version of Bazel
+installed_bazel_version=$(bazel version | grep label | sed -e 's/.*: //')
+tf_bazel_version=$(cat .bazelversion)
+if [ "$installed_bazel_version" != "$tf_bazel_version" ]; then
+  echo "Incorrect version of Bazel installed."
+  echo "Version $tf_bazel_version should be installed, but found version ${installed_bazel_version}."
+  echo "Run oss_scripts/install_bazel.sh or manually install the correct version."
+  exit 1
+fi
+
+# Set tensorflow version
+if [[ $osname != "Darwin" ]] || [[ ! $(sysctl -n machdep.cpu.brand_string) =~ "Apple" ]]; then
+  source oss_scripts/prepare_tf_dep.sh
+fi
+
 bazel test --test_output=errors --keep_going --jobs=1 tensorflow_text:all