Rewrite dev_tools/test_libs.sh (#710)

Co-authored-by: Pavol Juhas <juhas@google.com>

Author: mhucka

dev_tools/test_libs.sh

@@ -1,29 +1,71 @@
-#!/bin/bash
-set -e  # fail and exit on any command erroring
-set -x  # print evaluated commands
+#!/usr/bin/env bash
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
-which bazel
-bazel version
+set -eo pipefail -o errtrace
 
-# Attempt to build all components in SSE and basic mode.
-# The Github Action MacOS VMs may run on different-capability CPUs, so all AVX tests
-# are excluded from the build and test process.
-# apps are sample applications for experts and are meant to be run on only on Linux.
+declare -r usage="Usage: ${0##*/} [-h | --help | help] [bazel options ...]
+Run the programs in tests/, and on Linux, also build the programs in apps/.
 
+If the first option on the command line is -h, --help, or help, this help text
+will be printed and the program will exit. Any other options on the command
+line are passed directly to Bazel."
+
+# Exit early if the user requested help.
+if [[ "$1" == "-h" || "$1" == "--help" || "$1" == "help" ]]; then
+    echo "$usage"
+    exit 0
+fi
+
+declare features=""
+shopt -s nocasematch
+# Note: can't use Bash $OSTYPE var here b/c the value is "linux-gnu" on Win 10.
+case "$(uname -s)" in
+    darwin*)
+        features=$(sysctl machdep.cpu.features)
+        ;;
+    linux*)
+        features=$(grep -m1 -i "^flags" /proc/cpuinfo)
+        ;;
+    windows*|cygwin*|mingw32*|msys*|mingw*)
+        features=$(wmic cpu get Caption,InstructionSet /value 2>/dev/null)
+        ;;
+    *)
+        echo "Unsupported OS: $(uname -s)"
+        exit 1
+        ;;
+esac
+shopt -u nocasematch
+
+# Unless we can tell this system supports AVX, we skip those tests.
+declare filters=""
+[[ "$features" == *avx2* ]] || filters+=",-avx"
+[[ "$features" == *sse* ]] || filters+=",-sse"
+filters="${filters#,}"
+
+declare -a build_filters=()
+declare -a test_filters=()
+if [[ -n "$filters" ]]; then
+    build_filters=( "--build_tag_filters=$filters" )
+    test_filters=( "--test_tag_filters=$filters" )
+fi
+
+# Apps are sample programs and are only meant to run on Linux.
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
-  bazel build --config=sse apps:all
-  bazel build apps:all
+    bazel build "${build_filters[@]}" --config=sse "$@" apps:all
+    bazel build "${build_filters[@]}" "$@" apps:all
 fi
 
-# Run all basic tests.
-set e  # Ignore errors until artifacts are collected.
-EXIT_CODE=0
-for TARGET in bitstring_test channels_cirq_test circuit_qsim_parser_test expect_test \
-              fuser_basic_test gates_qsim_test hybrid_avx_test matrix_test qtrajectory_avx_test \
-              run_qsim_test run_qsimh_test simulator_basic_test simulator_sse_test statespace_basic_test \
-              statespace_sse_test unitary_calculator_basic_test unitary_calculator_sse_test \
-              unitaryspace_basic_test unitaryspace_sse_test vectorspace_test; do \
-  if ! bazel test --test_output=errors tests:${TARGET}; then
-    EXIT_CODE=1
-  fi
-done
+# Run all basic tests. This should work on all platforms.
+bazel test "${build_filters[@]}" "${test_filters[@]}" "$@" tests:all