feat: Test Action

Including commits:
* chore: Disable test workflow
* Determine hosts
* Build each host
* Add NixOS to build step as well
* More specific hostnames
* fix json elements
* try different way
* Debug matrix
* run on push
* use var directly
* fix mappings
* fix mappings
* add toolcache
* Change names and ordere
* Debugging
* Debugging extra step
* Debugging needs outputs
* Debugging needs outputs hosts
* Preserve quotes
* printf escaped
* Using EOF
* test
* escape?
* without json parse
* hardcoding
* change build command
* Testing

.github/workflows/build.yml

@@ -0,0 +1,43 @@
+name: "Build"
+on:
+  pull_request:
+  push:
+
+jobs:
+  determine-hosts:
+    name: "Determining hosts to build"
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-24.04
+    outputs:
+      hosts: ${{ steps.hosts.outputs.hostnames }}
+    steps:
+      - uses: actions/checkout@v5
+      - uses: https://github.com/cachix/install-nix-action@v31
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - name: "Determine hosts"
+        id: hosts
+        run: |
+          hostnames="$(nix eval .#nixosConfigurations --apply builtins.attrNames --json)"
+          printf "hostnames=%s\n" "${hostnames}" >> "${GITHUB_OUTPUT}"
+
+  build:
+    runs-on: ubuntu-latest
+    container: catthehacker/ubuntu:act-24.04
+    needs: determine-hosts
+    strategy:
+      matrix:
+        hostname: [
+          Development,
+          Testing
+        ]
+
+    steps:
+      - uses: actions/checkout@v5
+      - uses: https://github.com/cachix/install-nix-action@v31
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - name: "Build host"
+        run: |
+          nix build ".#nixosConfigurations.${{ matrix.hostname }}.config.system.build.toplevel" --verbose
+

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: "Test"
+on:
+  pull_request:
+  push:
+jobs:
+  tests:
+    if: false
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    steps:
+    - uses: actions/checkout@v5
+    - uses: https://github.com/cachix/install-nix-action@v31
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - name: "My custom step"
+      run: nix run nixpkgs#hello

.gitignore

@@ -1 +1,2 @@
 .idea
+result