Add Evol testbed CI image

.gitea/workflows/build-ci-image.yml

@@ -0,0 +1,37 @@
+name: build-ci-image
+
+on:
+  push:
+    paths:
+      - ci/Dockerfile
+      - .dockerignore
+      - .gitea/workflows/build-ci-image.yml
+  workflow_dispatch:
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to container registry
+        run: |
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login "${{ vars.REGISTRY_HOST }}" \
+            -u "${{ secrets.REGISTRY_USERNAME }}" \
+            --password-stdin
+
+      - name: Build CI image
+        run: |
+          docker build \
+            --build-arg BASE_IMAGE=catthehacker/ubuntu:act-latest \
+            --build-arg LLVM_VERSION=22 \
+            --build-arg MESON_VERSION=latest \
+            -t "${{ vars.REGISTRY_IMAGE }}:latest" \
+            -t "${{ vars.REGISTRY_IMAGE }}:clang22" \
+            -f ci/Dockerfile .
+
+      - name: Push CI image
+        run: |
+          docker push "${{ vars.REGISTRY_IMAGE }}:latest"
+          docker push "${{ vars.REGISTRY_IMAGE }}:clang22"

.gitea/workflows/build.yml

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+name: build
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+
+    # Set vars.CI_IMAGE to the same value as vars.REGISTRY_IMAGE, or replace this
+    # line with your full image path, e.g. git.neosisyphus.com/evol3d/evol-testbed:clang22
+    container:
+      image: ${{ vars.CI_IMAGE }}:clang22
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check CI toolchain
+        run: |
+          clang --version
+          clang++ --version
+          meson --version
+          ninja --version
+          python3 --version
+          vulkaninfo --summary || true
+
+      - name: Configure
+        run: |
+          meson setup build
+
+      - name: Build
+        run: |
+          meson compile -C build