Merge branch 'ci-cd' into 'main'

Ci cd

See merge request mancini/microbenchmarks!2

.gitlab-ci.yml

+stages:          # List of stages for jobs, and their order of execution
+  - build
+  - test
+
+
+build-job:       # This job runs in the build stage, which runs first.
+  stage: build
+  before_script:
+    - module load spack
+    - module load cmake
+  tags:
+    - das6-gpu
+  script:
+    - cmake -B build .
+    - make -C build
+
+collect-performance:   # This job runs in the test stage.
+  tags:
+    - das6-gpu
+  stage: test    # It only starts when the job in the build stage completes successfully.
+  dependencies:
+    - build-job
+  before_script:
+    - module load spack
+    - module load cmake 
+  script:
+    - cmake -B build .
+    - make -C build
+    - build/microbenchmarks --benchmark_out=results.json --benchmark_out_format=json
+  artifacts:
+    paths:
+        - ./results.json
+    untracked: false
+    when: on_success
+    access: all
+    expire_in: 1 days
+

CMakeLists.txt

 cmake_minimum_required(VERSION 3.14)
 project(microbenchmarks)
 
-# Require C++11
+# Require C++17
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE INTERNAL  "Download GTest sources")
+set(BENCHMARK_ENABLE_GTEST_TESTS
+    OFF
+    CACHE INTERNAL "Download GTest sources")
 include(FetchContent)
 FetchContent_Declare(
   googlebenchmark
   GIT_REPOSITORY https://github.com/google/benchmark.git
   GIT_TAG v1.8.3 # Optionally specify the exact tag or commit to fetch
-  CMAKE_ARGS     "-DBENCHMARK_DOWNLOAD_DEPENDENCIES=True"
-)
-
+  CMAKE_ARGS "-DBENCHMARK_DOWNLOAD_DEPENDENCIES=True")
 
 # Make the fetched content available.
 FetchContent_MakeAvailable(googlebenchmark)