feat: Migrate CI to gitea

.gitea/workflows/ci.yml

@@ -0,0 +1,90 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  flake-check:
+    name: Flake Check
+    runs-on: [self-hosted, nix-builder]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Check flake
+        run: nix flake check --show-trace --print-build-logs
+
+  format-check:
+    name: Format Check
+    runs-on: [self-hosted, nix-builder]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Check formatting
+        run: |
+          nix fmt **/*.nix
+          if ! git diff --quiet; then
+            echo "::error::Code is not formatted. Please run 'nix fmt **/*.nix' locally."
+            git diff
+            exit 1
+          fi
+
+  eval-configs:
+    name: Evaluate Key Configurations
+    runs-on: [self-hosted, nix-builder]
+    needs: [flake-check, format-check]
+    strategy:
+      matrix:
+        config:
+          - nix-builder
+          - nix-laptop1
+          - nix-desktop1
+      fail-fast: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Evaluate configuration
+        run: |
+          echo "Evaluating configuration for ${{ matrix.config }}"
+          nix eval .#nixosConfigurations.${{ matrix.config }}.config.system.build.toplevel.drvPath \
+            --show-trace
+
+  build-artifacts:
+    name: Build Artifacts
+    runs-on: [self-hosted, nix-builder]
+    needs: [flake-check, format-check]
+    strategy:
+      matrix:
+        artifact:
+          - lxc-nix-builder
+          - installer-iso-nix-laptop1
+      fail-fast: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build artifact
+        run: |
+          echo "Building artifact ${{ matrix.artifact }}"
+          nix build .#${{ matrix.artifact }} \
+            --print-build-logs \
+            --show-trace
+
+      - name: Show build result
+        run: |
+          if [ -L result ]; then
+            ls -lh result/
+            if [ -d result/iso ]; then
+              ls -lh result/iso/
+            fi
+          fi