From 8a0889ed44f437e830a032d3801972f866073bba Mon Sep 17 00:00:00 2001
From: scivision <scivision@users.noreply.github.com>
Date: Thu, 1 Aug 2024 08:46:04 -0400
Subject: [PATCH] CMake >= 3.20 required & CI enabled

---
 .github/workflows/ci.yml                     | 33 ++++++++++++++++++++
 .github/workflows/composite-cmake/action.yml | 26 +++++++++++++++
 CMakeLists.txt                               |  2 +-
 3 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 .github/workflows/composite-cmake/action.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index be4fbc0..580a6e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -125,3 +125,36 @@ jobs:
       with:
         name: coverage-report-html
         path: build-coverage/coverage/
+
+
+  cmake-older:
+    timeout-minutes: 30
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        cmake_version: ["3.20.6"]
+
+    steps:
+
+    - uses: actions/checkout@v4
+
+    - name: prereqs
+      run: |
+        sudo apt-get update
+        sudo apt install --no-install-recommends libhdf5-dev
+
+    - uses: ./.github/workflows/composite-cmake
+
+    - name: configure
+      run: $CMAKE -Bbuild -DCMAKE_INSTALL_PREFIX:PATH=$(pwd)/build/local
+
+    - name: build
+      run: $CMAKE --build build
+
+    - name: test
+      run: $CTEST --test-dir build
+
+    - name: install package
+      run: $CMAKE --install build
diff --git a/.github/workflows/composite-cmake/action.yml b/.github/workflows/composite-cmake/action.yml
new file mode 100644
index 0000000..af67e35
--- /dev/null
+++ b/.github/workflows/composite-cmake/action.yml
@@ -0,0 +1,26 @@
+runs:
+
+  using: "composite"
+
+  steps:
+  - name: environment
+    shell: bash
+    run: |
+      echo "osarch=linux-x86_64" >> $GITHUB_ENV
+      echo "archive=linux-x86_64.tar.gz" >> $GITHUB_ENV
+
+  - name: Install CMake ${{ matrix.cmake_version }}
+    shell: bash
+    run: |
+      curl -LO "https://github.com/Kitware/CMake/releases/download/v${{ matrix.cmake_version }}/cmake-${{ matrix.cmake_version }}-$archive"
+      tar -xf cmake-${{ matrix.cmake_version }}-$archive
+
+  - name: CMake path
+    shell: bash
+    run: |
+      echo "CMAKE=$GITHUB_WORKSPACE/cmake-${{ matrix.cmake_version }}-$osarch/bin/cmake" >> $GITHUB_ENV
+      echo "CTEST=$GITHUB_WORKSPACE/cmake-${{ matrix.cmake_version }}-$osarch/bin/ctest" >> $GITHUB_ENV
+
+  - name: echo CMake version
+    shell: bash
+    run: $CMAKE --version
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd575b2..89005c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.19...3.30)
+cmake_minimum_required(VERSION 3.20...3.30)
 
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
   message(FATAL_ERROR "Please do out of source build like