Shellcheck: ci/ (2) (#13169)

Signed-off-by: Ryan Northey <ryan@synca.io>

ci/build_setup.sh

@@ -6,17 +6,25 @@ set -e
 
 export PPROF_PATH=/thirdparty_build/bin/pprof
 
-[ -z "${NUM_CPUS}" ] && NUM_CPUS=`grep -c ^processor /proc/cpuinfo`
+[ -z "${NUM_CPUS}" ] && NUM_CPUS=$(grep -c ^processor /proc/cpuinfo)
 [ -z "${ENVOY_SRCDIR}" ] && export ENVOY_SRCDIR=/source
 [ -z "${ENVOY_BUILD_TARGET}" ] && export ENVOY_BUILD_TARGET=//source/exe:envoy-static
 [ -z "${ENVOY_BUILD_DEBUG_INFORMATION}" ] && export ENVOY_BUILD_DEBUG_INFORMATION=//source/exe:envoy-static.dwp
-[ -z "${ENVOY_BUILD_ARCH}" ] && export ENVOY_BUILD_ARCH=$(uname -m)
+[ -z "${ENVOY_BUILD_ARCH}" ] && {
+    ENVOY_BUILD_ARCH=$(uname -m)
+    export ENVOY_BUILD_ARCH
+}
+
+read -ra BAZEL_BUILD_EXTRA_OPTIONS <<< "${BAZEL_BUILD_EXTRA_OPTIONS:-}"
+read -ra BAZEL_EXTRA_TEST_OPTIONS <<< "${BAZEL_EXTRA_TEST_OPTIONS:-}"
+read -ra BAZEL_OPTIONS <<< "${BAZEL_OPTIONS:-}"
+
 echo "ENVOY_SRCDIR=${ENVOY_SRCDIR}"
 echo "ENVOY_BUILD_TARGET=${ENVOY_BUILD_TARGET}"
 echo "ENVOY_BUILD_ARCH=${ENVOY_BUILD_ARCH}"
 
 function setup_gcc_toolchain() {
-  if [[ ! -z "${ENVOY_STDLIB}" && "${ENVOY_STDLIB}" != "libstdc++" ]]; then
+  if [[ -n "${ENVOY_STDLIB}" && "${ENVOY_STDLIB}" != "libstdc++" ]]; then
     echo "gcc toolchain doesn't support ${ENVOY_STDLIB}."
     exit 1
   fi
@@ -26,23 +34,23 @@ function setup_gcc_toolchain() {
     export BAZEL_COMPILER=gcc
     echo "$CC/$CXX toolchain configured"
   else
-    export BAZEL_BUILD_OPTIONS="--config=remote-gcc ${BAZEL_BUILD_OPTIONS}"
+    BAZEL_BUILD_OPTIONS=("--config=remote-gcc" "${BAZEL_BUILD_OPTIONS[@]}")
   fi
 }
 
 function setup_clang_toolchain() {
   ENVOY_STDLIB="${ENVOY_STDLIB:-libc++}"
   if [[ -z "${ENVOY_RBE}" ]]; then
     if [[ "${ENVOY_STDLIB}" == "libc++" ]]; then
-      export BAZEL_BUILD_OPTIONS="--config=libc++ ${BAZEL_BUILD_OPTIONS}"
+      BAZEL_BUILD_OPTIONS=("--config=libc++" "${BAZEL_BUILD_OPTIONS[@]}")
     else
-      export BAZEL_BUILD_OPTIONS="--config=clang ${BAZEL_BUILD_OPTIONS}"
+      BAZEL_BUILD_OPTIONS=("--config=clang" "${BAZEL_BUILD_OPTIONS[@]}")
     fi
   else
     if [[ "${ENVOY_STDLIB}" == "libc++" ]]; then
-      export BAZEL_BUILD_OPTIONS="--config=remote-clang-libc++ ${BAZEL_BUILD_OPTIONS}"
+      BAZEL_BUILD_OPTIONS=("--config=remote-clang-libc++" "${BAZEL_BUILD_OPTIONS[@]}")
     else
-      export BAZEL_BUILD_OPTIONS="--config=remote-clang ${BAZEL_BUILD_OPTIONS}"
+      BAZEL_BUILD_OPTIONS=("--config=remote-clang" "${BAZEL_BUILD_OPTIONS[@]}")
     fi
   fi
   echo "clang toolchain with ${ENVOY_STDLIB} configured"
@@ -61,7 +69,7 @@ export PATH=/opt/llvm/bin:${PATH}
 export CLANG_FORMAT="${CLANG_FORMAT:-clang-format}"
 
 if [[ -f "/etc/redhat-release" ]]; then
-  export BAZEL_BUILD_EXTRA_OPTIONS+="--copt=-DENVOY_IGNORE_GLIBCXX_USE_CXX11_ABI_ERROR=1"
+  BAZEL_BUILD_EXTRA_OPTIONS+=("--copt=-DENVOY_IGNORE_GLIBCXX_USE_CXX11_ABI_ERROR=1")
 fi
 
 function cleanup() {
@@ -76,16 +84,25 @@ trap cleanup EXIT
 export LLVM_ROOT="${LLVM_ROOT:-/opt/llvm}"
 "$(dirname "$0")"/../bazel/setup_clang.sh "${LLVM_ROOT}"
 
-[[ "${BUILD_REASON}" != "PullRequest" ]] && BAZEL_EXTRA_TEST_OPTIONS+=" --nocache_test_results"
+[[ "${BUILD_REASON}" != "PullRequest" ]] && BAZEL_EXTRA_TEST_OPTIONS+=("--nocache_test_results")
 
 export BAZEL_QUERY_OPTIONS="${BAZEL_OPTIONS}"
 # Use https://docs.bazel.build/versions/master/command-line-reference.html#flag--experimental_repository_cache_hardlinks
 # to save disk space.
-export BAZEL_BUILD_OPTIONS=" ${BAZEL_OPTIONS} --verbose_failures --show_task_finish --experimental_generate_json_trace_profile \
-  --test_output=errors --repository_cache=${BUILD_DIR}/repository_cache --experimental_repository_cache_hardlinks \
-  ${BAZEL_BUILD_EXTRA_OPTIONS} ${BAZEL_EXTRA_TEST_OPTIONS}"
-
-[[ "${ENVOY_BUILD_ARCH}" == "aarch64" ]] && BAZEL_BUILD_OPTIONS="${BAZEL_BUILD_OPTIONS} --flaky_test_attempts=2 --test_env=HEAPCHECK="
+BAZEL_BUILD_OPTIONS=(
+  "${BAZEL_OPTIONS[@]}"
+  "--verbose_failures"
+  "--show_task_finish"
+  "--experimental_generate_json_trace_profile"
+  "--test_output=errors"
+  "--repository_cache=${BUILD_DIR}/repository_cache"
+  "--experimental_repository_cache_hardlinks"
+  "${BAZEL_BUILD_EXTRA_OPTIONS[@]}"
+  "${BAZEL_EXTRA_TEST_OPTIONS[@]}")
+
+[[ "${ENVOY_BUILD_ARCH}" == "aarch64" ]] && BAZEL_BUILD_OPTIONS+=(
+	"--flaky_test_attempts=2"
+	"--test_env=HEAPCHECK=")
 
 [[ "${BAZEL_EXPUNGE}" == "1" ]] && bazel clean --expunge
 
@@ -119,6 +136,7 @@ export BUILDOZER_BIN="${BUILDOZER_BIN:-/usr/local/bin/buildozer}"
 # source tree is different than the current workspace, the setup step is
 # skipped.
 if [[ "$1" != "-nofetch" && "${ENVOY_SRCDIR}" == "$(bazel info workspace)" ]]; then
+  # shellcheck source=ci/filter_example_setup.sh
   . "$(dirname "$0")"/filter_example_setup.sh
 else
   echo "Skip setting up Envoy Filter Example."