From 6666e2f5273bbbabfb2808e86f7d236221d70f0e Mon Sep 17 00:00:00 2001
From: Dennis Klein <d.klein@gsi.de>
Date: Thu, 20 May 2021 00:18:25 +0200
Subject: [PATCH] CI: Improve workflow

* Test all supported CMake versions
* Output CMake version
* Test latest CMake version on macOS
* Split build into multiple steps
* Reduce log noise in test step
---
 .github/workflows/test.yml  | 41 +++++++++++++++++++--------
 FairCMakeModules_test.cmake | 56 ++++++++++++++++++++++++++-----------
 2 files changed, 69 insertions(+), 28 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d8666ac..51a83b6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,15 +1,34 @@
 ---
-name: "Run Test suite"
+name: Test
 on: [push, pull_request]
 jobs:
-  run-simple-tests:
-    runs-on: ubuntu-latest
+  main:
+    strategy:
+      matrix:
+        cmake: ['3.20', '3.19', '3.18', '3.17', '3.16', '3.15']
+        os: [ubuntu-latest]
+        name: [Linux]
+        include:
+          - cmake: '3.20'
+            os: macos-latest
+            name: macOS
+    name: ${{ matrix.name }} - CMake ${{ matrix.cmake }}
+    runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
-    # CMake already installed in /usr/local - Wow
-    # - name: Install cmake from OS
-    #   run: |
-    #     sudo apt-get install cmake
-    - name: Run CTest
-      run: |
-        ctest -VV -S *_test.cmake
+      - uses: actions/checkout@v2
+      - name: Setup cmake
+        uses: jwlawson/actions-setup-cmake@v1.9
+        with:
+          cmake-version: ${{ matrix.cmake }}
+      - name: Use cmake
+        run: cmake --version
+      - name: Configure
+        run: ctest -VV -D "STEPS=clean;configure" -S FairCMakeModules_test.cmake
+      - name: Build
+        run: ctest -VV -D "STEPS=build" -S FairCMakeModules_test.cmake
+      - name: Install
+        run: ctest -VV -D "STEPS=install" -S FairCMakeModules_test.cmake
+      - name: Test
+        run: >
+          ctest -V --output-on-failure -D "STEPS=test"
+          -S FairCMakeModules_test.cmake
diff --git a/FairCMakeModules_test.cmake b/FairCMakeModules_test.cmake
index 6ebf659..8d38f37 100644
--- a/FairCMakeModules_test.cmake
+++ b/FairCMakeModules_test.cmake
@@ -6,26 +6,48 @@
 #                  copied verbatim in the file "LICENSE"                       #
 ################################################################################
 
+cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
+cmake_policy(VERSION 3.15...3.20)
+
+if(NOT STEPS)
+  list(APPEND STEPS clean configure build install test)
+endif()
+
 set(CTEST_SOURCE_DIRECTORY .)
 set(CTEST_BINARY_DIRECTORY build)
 set(CTEST_CMAKE_GENERATOR "Unix Makefiles")
-
-ctest_empty_binary_directory("${CTEST_BINARY_DIRECTORY}")
-ctest_start(Continuous)
-
 get_filename_component(test_install_prefix "${CTEST_BINARY_DIRECTORY}/install"
                        ABSOLUTE)
-list(APPEND options
-  "-Wdev"
-  "-Werror=dev"
-  "-DCMAKE_INSTALL_PREFIX:PATH=${test_install_prefix}"
-)
-ctest_configure(OPTIONS "${options}")
-
-ctest_build(TARGET install)
-ctest_test(RETURN_VALUE _ctest_test_ret_val)
-
-if (_ctest_test_ret_val)
-  message(FATAL_ERROR " \n"
-          "   /!\\  Some tests failed.")
+
+if(clean IN_LIST STEPS)
+  file(REMOVE_RECURSE ${CTEST_BINARY_DIRECTORY})
+  file(REMOVE_RECURSE ${test_install_prefix})
+  ctest_start(Continuous)
+else()
+  ctest_start(Continuous APPEND QUIET)
+endif()
+
+if(configure IN_LIST STEPS)
+  list(APPEND options
+    "-Wdev"
+    "-Werror=dev"
+    "-DCMAKE_INSTALL_PREFIX:PATH=${test_install_prefix}"
+  )
+  ctest_configure(OPTIONS "${options}")
 endif()
+
+if(build IN_LIST STEPS)
+  ctest_build()
+endif()
+
+if(install IN_LIST STEPS)
+  ctest_build(TARGET install)
+endif()
+
+if(test IN_LIST STEPS)
+  ctest_test(RETURN_VALUE __ret)
+  if(__ret)
+    message(FATAL_ERROR "Some tests failed.")
+  endif()
+endif()
+