refactor: Unify CI tasks

Use one task but different concurrent jobs.

Signed-off-by: Alexander Kurbatov <Alexander.Kurbatov@acronis.com>

Author: Alexander Kurbatov

.github/workflows/ci.yml

@@ -19,19 +19,57 @@ env:
   BUILD_DIR: ${{github.workspace}}/build
 
 jobs:
-  build:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup
+        run: curl -o cpplint.py https://raw.githubusercontent.com/google/styleguide/gh-pages/cpplint/cpplint.py
+
+      - name: Lint
+        run: |
+          python2 cpplint.py \
+            --linelength=90 \
+            --filter=-build/header_guard,-build/include,-build/c++11 \
+            src/* \
+            src/blueprints/* \
+            src/core/* \
+            src/objects/* \
+            src/plugins/* \
+            src/strategies/* \
+            src/strategies/protoss/* \
+            src/strategies/terran/* \
+            src/strategies/zerg/*
+
+  crossplatform_build:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: [windows-latest, macos-latest, ubuntu-latest]
 
     steps:
-    - uses: actions/checkout@v2
-      with:
-        submodules: recursive
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Configure
+        run: cmake -B ${{env.BUILD_DIR}} -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+      - name: Build
+        run: cmake --build ${{env.BUILD_DIR}} --config ${{env.BUILD_TYPE}} --parallel 2
+
+  ladder_build:
+    runs-on: ubuntu-18.04
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
 
-    - name: Configure
-      run: cmake -B ${{env.BUILD_DIR}} -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+      - name: Configure
+        run: cmake -B ${{env.BUILD_DIR}} -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DBUILD_FOR_LADDER=ON -DSC2_VERSION=4.10.0
 
-    - name: Build
-      run: cmake --build ${{env.BUILD_DIR}} --config ${{env.BUILD_TYPE}} --parallel 2
+      - name: Build
+        run: cmake --build ${{env.BUILD_DIR}} --config ${{env.BUILD_TYPE}} --parallel 2