ci: add a c2v job too, that checks that Doom compiles.

.github/workflows/c2v.yml

@@ -0,0 +1,56 @@
+name: C2V apps
+
+on:
+  push:
+    paths-ignore:
+      - "**.md"
+      - "doc/**"
+      - "examples/**"
+      - "tutorials/**"
+  pull_request:
+    paths-ignore:
+      - "**.md"
+      - "doc/**"
+      - "examples/**"
+      - "tutorials/**"
+
+concurrency:
+  group: build-c2v-apps-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  doom-compiles:
+    runs-on: ubuntu-20.04
+    if: github.event_name != 'push' || github.event.ref == 'refs/heads/master' || github.event.repository.full_name != 'vlang/v'
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build V
+        run: make && ./v symlink -githubci
+
+      - name: Build C2V
+        run: |
+          echo "Clone C2V"
+          mkdir -p ~/code/
+          git clone --depth 1 https://github.com/vlang/c2v ~/code/c2v
+          ln -s ~/code/c2v ~/.vmodules/c2v
+          v -g ~/.vmodules/c2v/
+          ~/.vmodules/c2v/c2v || true
+
+      - name: Install Doom Dependencies
+        run: |
+          sudo apt-get update -y -qq
+          sudo apt-get install libsdl2-dev libsdl2-mixer-dev libsdl2-net-dev libpng-dev libsamplerate0-dev
+
+      - name: Build original Chocolate Doom
+        run: |
+          git clone --quiet --depth 1 https://github.com/vlang/doom ~/code/doom
+          cd ~/code/doom/chocolate-doom
+          cmake -DCMAKE_BUILD_TYPE=Debug .
+          make chocolate-doom
+
+      - name: Translate the whole game in project/folder mode and compile it
+        run: |
+          cd ~/code/doom
+          touch ~/DOOM1.WAD
+          WAD_FILE=~/DOOM1.WAD ~/code/doom/build_whole_project.sh