Add flake and related GH workflows

.github/workflows/cachix-build.yml

@@ -0,0 +1,25 @@
+# Workflow to build and push the static hugo files to Cachix
+name: 🛫 Build and push to Cachix
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v14
+      with:
+        name: qgis-org
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - run: nix build .#qgis-website 
+    - run: nix flake check

.github/workflows/flake-update.yml

@@ -0,0 +1,37 @@
+name: Update Nix Flake inputs
+
+on:
+  schedule:
+    - cron:  '0 1 * * *'
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Update flakes and commit changes
+    runs-on: ubuntu-latest
+    permissions:
+      # Give the default GITHUB_TOKEN write permission to commit and push the
+      # added or changed files to the repository.
+      contents: write
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+          # This will allow us to trigger other workflows (cachix-build, etc.)
+          # when we commit changes using the git-auto-commit-action
+          token: ${{ secrets.PAT }}
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v25
+
+      - name: Run nix flake update
+        run: >
+          nix flake update
+
+      - name: '✉️ Commit'
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: 'Flakes updated and committed via a GitHub Action.'
+

.github/workflows/github-pages.yml

@@ -37,7 +37,7 @@ jobs:
           wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb \
           && sudo dpkg -i ${{ runner.temp }}/hugo.deb
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
       - name: Setup Pages

.github/workflows/playwright-e2e.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 🛒 Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: 🛠️ Setup Hugo
         uses: peaceiris/actions-hugo@v3

.github/workflows/update-feeds.yml

@@ -13,10 +13,13 @@ jobs:
     if: github.repository_owner == 'qgis'
     steps:
     - name: '🛒 Checkout QGIS Website'
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         ref: main
         path: ./qgis-website
+          # This will allow us to trigger other workflows (cachix-build, etc.)
+          # when we commit changes using the git-auto-commit-action
+        token: ${{ secrets.PAT }}
 
     - name: '🐍 Setup Python'
       uses: actions/setup-python@v3

flake.nix

@@ -0,0 +1,59 @@
+{
+  description = "Development environment and build process for a Hugo app with Python requirements";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }: 
+    let
+      system = "x86_64-linux";
+
+      # Importing packages from nixpkgs
+      pkgs = import nixpkgs {
+        inherit system;
+        config.allowUnfree = true; # Allow unfree packages like VSCode if needed
+      };
+
+
+      mkDevShell = pkgs.mkShell {
+        packages = with pkgs; [
+          hugo                          # Hugo for building the website
+          vscode                        # VSCode for development
+          python312Packages.icalendar  # Python packages
+          python312Packages.requests   # Python packages
+          gnumake                       # GNU Make for build automation
+        ];
+
+        shellHook = ''
+          export DIRENV_LOG_FORMAT=
+          echo "-----------------------"
+          echo "🌈 Your Hugo Dev Environment is ready."
+          echo "It provides hugo and vscode for use with the QGIS Website Project"
+          echo ""
+          echo "🪛 VSCode:"
+          echo "--------------------------------"
+          echo "Start vscode like this:"
+          echo ""
+          echo "./vscode.sh"
+          echo ""
+          echo "🪛 Hugo:"
+          echo "--------------------------------"
+          echo "Start Hugo like this:"
+          echo ""
+          echo "hugo server"
+          echo "-----------------------"
+        '';
+      };
+
+    in
+    {
+      devShells.x86_64-linux.default =  mkDevShell;
+
+      packages = {
+        x86_64-linux = {
+          qgis-website = pkgs.callPackage ./package.nix {};
+        };
+      };
+    };
+}

package.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, hugo, gnumake }:
+
+stdenv.mkDerivation {
+    name = "qgis-website";
+    src = lib.cleanSourceWith {
+        src = ./.;
+        filter = (
+        path: type: (builtins.all (x: x != baseNameOf path) [
+            ".git"
+            ".github"
+            "flake.nix"
+            "package.nix"
+        ])
+        );
+    };
+    buildInputs = [ hugo gnumake ];
+
+    buildPhase = ''
+        make deploy
+    '';
+
+    installPhase = ''
+        mkdir -p $out
+        cp -r public_www public_prod $out/
+    '';
+
+    meta = with lib; {
+        description = "A built QGIS website";
+        license = licenses.mit;
+    };
+}
+