Squashed 'libs/protobuf/' content from commit fcd3b9a85

git-subtree-dir: libs/protobuf
git-subtree-split: fcd3b9a85ef36e46643dc30176cea1a7ad62e02b

kokoro/common/bazel_flags.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# Helper for setting up common bazel flags in Kokoro.
+#
+# This script prints extra flags to a bazel invocation when it is run from
+# Kokoro.  When the special environment variables are not present (e.g., if you
+# run Kokoro build scripts locally), this script only flips some debug settings.
+#
+# Example of running directly:
+#   bazel test $(path/to/bazel_flags.sh) //...
+
+function bazel_flags::gen_invocation_id() {
+  # Create a new invocation ID and store in the artifacts dir.
+  local _invocation_id=$(uuidgen | tr A-Z a-z)
+
+  # Put the new invocation ID at the start of the output IDs file. Some
+  # Google-internal tools only look at the first entry, so this ensures the most
+  # recent entry is first.
+  local _ids_file=${KOKORO_ARTIFACTS_DIR}/bazel_invocation_ids
+  local _temp_ids=$(mktemp)
+  echo ${_invocation_id} > ${_temp_ids}
+  [[ -e ${_ids_file} ]] && cat ${_ids_file} >> ${_temp_ids}
+  mv -f ${_temp_ids} ${_ids_file}
+
+  echo -n ${_invocation_id}
+}
+
+# Prints flags to use on Kokoro.
+function bazel_flags::kokoro_flags() {
+  [[ -n ${KOKORO_JOB_NAME:-} ]] || return
+
+  local -a _flags
+  _flags+=(
+    --invocation_id=$(bazel_flags::gen_invocation_id)
+    --remote_cache=https://storage.googleapis.com/protobuf-bazel-cache/${KOKORO_JOB_NAME}
+  )
+  if [[ -n ${KOKORO_BAZEL_AUTH_CREDENTIAL:-} ]]; then
+    _flags+=( --google_credentials=${KOKORO_BAZEL_AUTH_CREDENTIAL} )
+  else
+    _flags+=( --google_default_credentials=true )
+  fi
+
+  echo "${_flags[@]}"
+}
+
+echo "$(bazel_flags::kokoro_flags) --keep_going --test_output=errors"