GHA: Add lint job to Linux workflow

.github/workflows/linux.yml

@@ -75,3 +75,51 @@ jobs:
 
       - name: Build and test
         run: ./ci/script.sh
+
+  lint:
+    runs-on: ubuntu-latest
+    env:
+      CI_TARGET: lint
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup commom environment variables
+        run: |
+          echo "CI_BUILD_DIR=$GITHUB_WORKSPACE" >> $GITHUB_ENV
+          echo "BUILD_DIR=$GITHUB_WORKSPACE/build" >> $GITHUB_ENV
+          echo "DEPS_BUILD_DIR=$HOME/nvim-deps" >> $GITHUB_ENV
+          echo "INSTALL_PREFIX=$HOME/nvim-install" >> $GITHUB_ENV
+          echo "LOG_DIR=$GITHUB_WORKSPACE/build/log" >> $GITHUB_ENV
+          echo "NVIM_LOG_FILE=$GITHUB_WORKSPACE/build/.nvimlog" >> $GITHUB_ENV
+          echo "CMAKE_FLAGS=-DCI_BUILD=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX:PATH=$HOME/nvim-install -DBUSTED_OUTPUT_TYPE=nvim -DDEPS_PREFIX=$HOME/nvim-deps/usr -DMIN_LOG_LEVEL=3" >> $GITHUB_ENV
+          echo "ASAN_OPTIONS=detect_leaks=1:check_initialization_order=1:log_path=$GITHUB_WORKSPACE/build/log/asan" >> $GITHUB_ENV
+          echo "TSAN_OPTIONS=log_path=$GITHUB_WORKSPACE/build/log/tsan" >> $GITHUB_ENV
+          echo "UBSAN_OPTIONS=print_stacktrace=1 log_path=$GITHUB_WORKSPACE/build/log/ubsan" >> $GITHUB_ENV
+          echo "VALGRIND_LOG=$GITHUB_WORKSPACE/build/log/valgrind-%p.log" >> $GITHUB_ENV
+          echo "CACHE_NVIM_DEPS_DIR=$HOME/.cache/nvim-deps" >> $GITHUB_ENV
+          echo "CACHE_MARKER=$HOME/.cache/nvim-deps/.ci_cache_marker" >> $GITHUB_ENV
+          echo "CCACHE_BASEDIR=$GITHUB_WORKSPACE" >> $GITHUB_ENV
+
+      - name: Install apt packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y autoconf automake build-essential ccache cmake gcc-multilib gettext gperf libtool-bin locales ninja-build pkg-config python3 python3-pip python3-setuptools unzip
+
+      - name: Setup interpreter packages
+        run: |
+          ./ci/before_install.sh
+          ./ci/install.sh
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        env:
+          cache-name: lint-deps
+        with:
+          path: env.CACHE_NVIM_DEPS_DIR
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ github.base_ref }}
+
+      - name: Build third-party
+        run: ./ci/before_script.sh
+
+      - name: Build and test
+        run: ./ci/script.sh