update default nix and setup cachix

1 files changed, 30 insertions, 0 deletions

diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
new file mode 100644
index 0000000..bd399a8
--- /dev/null
+++ b/.github/workflows/nix.yml
@@ -0,0 +1,30 @@
+name: Cachix
+on:
+  push:
+jobs:
+  cachix:
+    name: Cachix branch
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        coq: [ "8.11", "8.10", "8.9", "8.8", "8.7" ]
+    steps:
+      - name: Get branch shortname
+        run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
+        id: branch-short-name
+      - name: Get repo name
+        run: echo "##[set-output name=repo;]$(echo $GITHUB_REPOSITORY | cut -d/ -f1)"
+        id: repo-name
+      - name: Get repo lowercase name
+        run: echo "##[set-output name=repo;]$(echo $GITHUB_REPOSITORY | cut -d/ -f1 | tr '[:upper:]' '[:lower:]')"
+        id: repo-lowercase-name
+      - uses: cachix/install-nix-action@v8
+      - uses: cachix/cachix-action@v6
+        with:
+          # Name of a cachix cache to push and pull/substitute
+          name: ${{ steps.repo-lowercase-name.outputs.repo }}
+          # Authentication token for Cachix, needed only for private cache access
+          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+      # building fake mathcomp-fast target
+      - run: nix-build https://github.com/math-comp/math-comp-nix/archive/master.tar.gz --arg config '{coq = "${{ matrix.coq }}"; mathcomp = "${{ steps.repo-name.outputs.repo }}/${{ steps.branch-short-name.outputs.branch }}";}' --argstr package mathcomp