update nix-action from templates

.github/workflows/nix-action.yml

@@ -0,0 +1,47 @@
+# This file was generated from `meta.yml`, please do not edit manually.
+# Follow the instructions on https://github.com/coq-community/templates to regenerate.
+name: Nix CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    paths:
+    - .github/workflows/**
+  pull_request_target:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        overrides:
+          - 'coq = "master"'
+      fail-fast: false
+    steps:
+      - name: Determine which commit to test
+        run: |
+          if [[ ${{ github.event_name }} =~ "pull_request" ]]; then
+            merge_commit=$(git ls-remote ${{ github.event.repository.html_url }} refs/pull/${{ github.event.number }}/merge | cut -f1)
+            if [ -z "$merge_commit" ]; then
+              echo "tested_commit=${{ github.event.pull_request.head.sha }}" >> $GITHUB_ENV
+            else
+              echo "tested_commit=$merge_commit" >> $GITHUB_ENV
+            fi
+          else
+            echo "tested_commit=${{ github.sha }}" >> $GITHUB_ENV
+          fi
+      - uses: cachix/install-nix-action@v20
+        with:
+          nix_path: nixpkgs=channel:nixpkgs-unstable
+      - uses: cachix/cachix-action@v12
+        with:
+          name: coq-community
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+          extraPullNames: coq, math-comp
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.tested_commit }}
+      - run: >
+          nix-build https://github.com/coq-community/coq-nix-toolbox/archive/master.tar.gz --argstr job qarith-stern-brocot --arg override '{ ${{ matrix.overrides }}; qarith-stern-brocot = builtins.filterSource (path: _: baseNameOf path != ".git") ./.; }'

README.md

@@ -5,6 +5,7 @@ Follow the instructions on https://github.com/coq-community/templates to regener
 # Binary Rational Numbers
 
 [![Docker CI][docker-action-shield]][docker-action-link]
+[![Nix CI][nix-action-shield]][nix-action-link]
 [![Contributing][contributing-shield]][contributing-link]
 [![Code of Conduct][conduct-shield]][conduct-link]
 [![Zulip][zulip-shield]][zulip-link]
@@ -13,6 +14,9 @@ Follow the instructions on https://github.com/coq-community/templates to regener
 [docker-action-shield]: https://github.com/coq-community/qarith-stern-brocot/workflows/Docker%20CI/badge.svg?branch=master
 [docker-action-link]: https://github.com/coq-community/qarith-stern-brocot/actions?query=workflow:"Docker%20CI"
 
+[nix-action-shield]: https://github.com/coq-community/qarith-stern-brocot/workflows/Nix%20CI/badge.svg?branch=master
+[nix-action-link]: https://github.com/coq-community/qarith-stern-brocot/actions?query=workflow:"Nix%20CI"
+
 [contributing-shield]: https://img.shields.io/badge/contributions-welcome-%23f7931e.svg
 [contributing-link]: https://github.com/coq-community/manifesto/blob/master/CONTRIBUTING.md
 

meta.yml

@@ -4,7 +4,7 @@ shortname: qarith-stern-brocot
 organization: coq-community
 community: true
 action: true
-nix: false
+nix: true
 
 synopsis: Binary rational numbers in Coq