nix: ci

.github/workflows/macos-linux-pip.yml

@@ -1,31 +1,20 @@
-name: Build ndcurves for Mac OS X/Linux via pip
+name: "Nix CI"
 
-on: [push, pull_request]
-
-env:
-    CTEST_OUTPUT_ON_FAILURE: 1
-    CTEST_PARALLEL_LEVEL: 4
+on: [pull_request, push]
 
 jobs:
-  ndcurves-pip:
-    name: "CI on ${{ matrix.os }} / python ${{ matrix.python-version }} with pip"
-    runs-on: "${{ matrix.os }}"
-
+  tests:
+    name: "Nix build on ${{ matrix.os }}"
+    runs-on: "${{ matrix.os }}-latest"
     strategy:
       matrix:
-        os: ["ubuntu-latest", "macos-latest"]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        os: [ubuntu]
     steps:
       - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
         with:
-          submodules: 'true'
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "${{ matrix.python-version }}"
-      - run: python -m pip install -U pip
-      - run: python -m pip install pin[build]
-      - run: echo "CMAKE_PREFIX_PATH=$(python -m cmeel cmake)" >> $GITHUB_ENV
-      - run: echo "LD_LIBRARY_PATH=$(python -m cmeel lib)" >> $GITHUB_ENV
-      - run: cmake -B build -S .
-      - run: cmake --build build
-      - run: cmake --build build -t test
+          extra-conf: |
+            trusted-substituters = https://gepetto.cachix.org
+            trusted-public-keys = gepetto.cachix.org-1:toswMl31VewC0jGkN6+gOelO2Yom0SOHzPwJMY2XiDY=
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - run: nix build --accept-flake-config