diff --git a/.coveralls.yml b/.coveralls.yml
new file mode 100644
index 0000000..1157ff2
--- /dev/null
+++ b/.coveralls.yml
@@ -0,0 +1 @@
+service_name: github-actions
diff --git a/.github/workflows/ci-windows.yaml b/.github/workflows/ci-windows.yaml
deleted file mode 100644
index 4a47062..0000000
--- a/.github/workflows/ci-windows.yaml
+++ /dev/null
@@ -1,230 +0,0 @@
-name: GitHub CI
-
-on:
-  push:
-    branches:
-      - '**'
-  pull_request:
-
-env:
-  VCVARSALL: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat
-
-  # Interfaces
-  # Lua
-  LUA_VER: 54
-  LUA_VER_DOT: '5.4'
-  LUA_RELEASE: 5.4.0
-  LUA32_URL: https://downloads.sourceforge.net/luabinaries/lua-%LUA_RELEASE%_Win32_dllw6_lib.zip
-  LUA64_URL: https://downloads.sourceforge.net/luabinaries/lua-%LUA_RELEASE%_Win64_dllw6_lib.zip
-  LUA_DIR: D:\Lua
-  # Python 2
-  PYTHON_VER: 27
-  PYTHON_VER_DOT: '2.7'
-  # Python 3
-  PYTHON3_VER: 38
-  PYTHON3_VER_DOT: '3.8'
-
-  # Other dependencies
-  # winpty
-  WINPTY_URL: https://github.com/rprichard/winpty/releases/download/0.4.3/winpty-0.4.3-msvc2015.zip
-
-  # Escape sequences
-  COL_RED: "\x1b[31m"
-  COL_GREEN: "\x1b[32m"
-  COL_YELLOW: "\x1b[33m"
-  COL_RESET: "\x1b[m"
-
-jobs:
-  build:
-    runs-on: windows-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        toolchain: [msvc, mingw]
-        arch: [x64, x86]
-        features: [HUGE, NORMAL]
-        include:
-          - arch: x64
-            vcarch: amd64
-            warch: x64
-            bits: 64
-            msystem: MINGW64
-            cygreg: registry
-            pyreg: ""
-          - arch: x86
-            vcarch: x86
-            warch: ia32
-            bits: 32
-            msystem: MINGW32
-            cygreg: registry32
-            pyreg: "-32"
-        exclude:
-          - toolchain: msvc
-            arch: x64
-            features: NORMAL
-          - toolchain: mingw
-            arch: x86
-            features: NORMAL
-
-    steps:
-    - name: Initalize
-      id: init
-      shell: bash
-      run: |
-        git config --global core.autocrlf input
-        python_dir=$(cat "/proc/${{ matrix.cygreg }}/HKEY_LOCAL_MACHINE/SOFTWARE/Python/PythonCore/${PYTHON_VER_DOT}/InstallPath/@")
-        python3_dir=$(cat "/proc/${{ matrix.cygreg }}/HKEY_LOCAL_MACHINE/SOFTWARE/Python/PythonCore/${PYTHON3_VER_DOT}${{ matrix.pyreg }}/InstallPath/@")
-        echo "PYTHON_DIR=$python_dir" >> $GITHUB_ENV
-        echo "PYTHON3_DIR=$python3_dir" >> $GITHUB_ENV
-
-    - uses: msys2/setup-msys2@v2
-      if: matrix.toolchain == 'mingw'
-      with:
-        msystem: ${{ matrix.msystem }}
-        release: false
-
-    - uses: actions/checkout@v2
-
-    - name: Create a list of download URLs
-      shell: cmd
-      run: |
-        type NUL > urls.txt
-        echo %LUA_RELEASE%>> urls.txt
-        echo %WINPTY_URL%>> urls.txt
-
-    - name: Cache downloaded files
-      uses: actions/cache@v2
-      with:
-        path: downloads
-        key: ${{ runner.os }}-${{ matrix.bits }}-${{ hashFiles('urls.txt') }}
-
-    - name: Download dependencies
-      shell: cmd
-      run: |
-        path C:\Program Files\7-Zip;%path%
-        if not exist downloads mkdir downloads
-
-        echo %COL_GREEN%Download Lua%COL_RESET%
-        call :downloadfile %LUA${{ matrix.bits }}_URL% downloads\lua.zip
-        7z x downloads\lua.zip -o%LUA_DIR% > nul || exit 1
-
-        echo %COL_GREEN%Download winpty%COL_RESET%
-        call :downloadfile %WINPTY_URL% downloads\winpty.zip
-        7z x -y downloads\winpty.zip -oD:\winpty > nul || exit 1
-        copy /Y D:\winpty\${{ matrix.warch }}\bin\winpty.dll        src\winpty${{ matrix.bits }}.dll
-        copy /Y D:\winpty\${{ matrix.warch }}\bin\winpty-agent.exe  src\
-
-        goto :eof
-
-        :downloadfile
-        :: call :downloadfile <URL> <localfile>
-        if not exist %2 (
-          curl -f -L %1 -o %2
-        )
-        if ERRORLEVEL 1 (
-          rem Retry once.
-          curl -f -L %1 -o %2 || exit 1
-        )
-        goto :eof
-
-    - name: Copy src directory to src2
-      shell: cmd
-      run: |
-        xcopy src src2\ /E > nul
-
-    - name: Build (MSVC)
-      if: matrix.toolchain == 'msvc'
-      shell: cmd
-      run: |
-        call "%VCVARSALL%" ${{ matrix.vcarch }}
-        cd src
-        :: Filter out the progress bar from the build log
-        sed -e "s/@<<$/@<< | sed -e 's#.*\\\\r.*##'/" Make_mvc.mak > Make_mvc2.mak
-        if "${{ matrix.features }}"=="HUGE" (
-          nmake -nologo -f Make_mvc2.mak ^
-            FEATURES=${{ matrix.features }} ^
-            GUI=yes IME=yes ICONV=yes VIMDLL=yes ^
-            DYNAMIC_LUA=yes LUA=%LUA_DIR% ^
-            DYNAMIC_PYTHON=yes PYTHON=%PYTHON_DIR% ^
-            DYNAMIC_PYTHON3=yes PYTHON3=%PYTHON3_DIR%
-        ) else (
-          nmake -nologo -f Make_mvc2.mak ^
-            FEATURES=${{ matrix.features }} ^
-            GUI=yes IME=yes ICONV=yes VIMDLL=yes
-        )
-        if not exist vim${{ matrix.bits }}.dll (
-          echo %COL_RED%Build failure.%COL_RESET%
-          exit 1
-        )
-
-    - name: Build (MinGW)
-      if: matrix.toolchain == 'mingw'
-      shell: msys2 {0}
-      run: |
-        cd src
-        if [ "${{ matrix.features }}" = "HUGE" ]; then
-          mingw32-make -f Make_ming.mak -j2 \
-            FEATURES=${{ matrix.features }} \
-            GUI=yes IME=yes ICONV=yes VIMDLL=yes \
-            DYNAMIC_LUA=yes LUA=${LUA_DIR} \
-            DYNAMIC_PYTHON=yes PYTHON=${PYTHON_DIR} \
-            DYNAMIC_PYTHON3=yes PYTHON3=${PYTHON3_DIR} \
-            STATIC_STDCPLUS=yes
-        else
-          mingw32-make -f Make_ming.mak -j2 \
-            FEATURES=${{ matrix.features }} \
-            GUI=yes IME=yes ICONV=yes VIMDLL=yes \
-            STATIC_STDCPLUS=yes
-        fi
-
-#    - name: Prepare Artifact
-#      shell: cmd
-#      run: |
-#        mkdir artifacts
-#        copy src\*vim.exe artifacts
-#        copy src\vim*.dll artifacts
-#
-#    - name: Upload Artifact
-#      uses: actions/upload-artifact@v1
-#      with:
-#        name: vim${{ matrix.bits }}-${{ matrix.toolchain }}
-#        path: ./artifacts
-
-    - name: Test
-      shell: cmd
-      timeout-minutes: 20
-      run: |
-        PATH %LUA_DIR%;C:\msys64\${{ matrix.msystem }}\bin;%PATH%;%PYTHON3_DIR%
-        call "%VCVARSALL%" ${{ matrix.vcarch }}
-        cd src
-        echo.
-        echo %COL_GREEN%vim version:%COL_RESET%
-        .\vim --version || exit 1
-
-        echo %COL_GREEN%Start testing vim in background.%COL_RESET%
-        start cmd /c "cd ..\src2\testdir & nmake -nologo -f Make_dos.mak VIMPROG=..\..\src\vim > nul & echo done>done.txt"
-
-        echo %COL_GREEN%Test gvim:%COL_RESET%
-        cd testdir
-        nmake -nologo -f Make_dos.mak VIMPROG=..\gvim || exit 1
-        cd ..
-
-        echo %COL_GREEN%Wait for vim tests to finish.%COL_RESET%
-        cd ..\src2\testdir
-        :: Wait about 10 minutes.
-        for /L %%i in (1,1,60) do (
-          if exist done.txt goto exitloop
-          timeout 10 > NUL 2>&1
-          if ERRORLEVEL 1 ping -n 11 localhost > NUL
-        )
-        set timeout=1
-        :exitloop
-
-        echo %COL_GREEN%Test results of vim:%COL_RESET%
-        if exist messages type messages
-        nmake -nologo -f Make_dos.mak report VIMPROG=..\..\src\vim || exit 1
-        if "%timeout%"=="1" (
-          echo %COL_RED%Timed out.%COL_RESET%
-          exit 1
-        )
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..758da09
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,519 @@
+name: GitHub CI
+
+on: [push, pull_request]
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+
+    env:
+      CC: ${{ matrix.compiler }}
+      TEST: test
+      SRCDIR: ./src
+      LEAK_CFLAGS: -DEXITFREE
+      LOG_DIR: ${{ github.workspace }}/logs
+      TERM: xterm
+      DISPLAY: ':99'
+
+    strategy:
+      fail-fast: false
+      matrix:
+        features: [tiny, small, normal, huge]
+        compiler: [clang, gcc]
+        extra: [none]
+        include:
+          - features: tiny
+            compiler: clang
+            extra: nogui
+          - features: tiny
+            compiler: gcc
+            extra: nogui
+          - features: normal
+            shadow: ./src/shadow
+          - features: huge
+            coverage: true
+          - features: huge
+            compiler: gcc
+            coverage: true
+            extra: testgui
+          - features: huge
+            compiler: clang
+            extra: asan
+          - features: huge
+            compiler: gcc
+            coverage: true
+            extra: unittests
+          - features: normal
+            compiler: gcc
+            extra: vimtags
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        env:
+          DEBIAN_FRONTEND: noninteractive
+        run: |
+          sudo apt-get install -y \
+            autoconf \
+            lcov \
+            gettext \
+            libcanberra-dev \
+            libperl-dev \
+            python-dev \
+            python3-dev \
+            liblua5.3-dev \
+            lua5.3 \
+            ruby-dev \
+            tcl-dev \
+            cscope \
+            libgtk2.0-dev \
+            desktop-file-utils \
+            libtool-bin
+          if [[ ${CC} = clang ]]; then
+            wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+            sudo add-apt-repository -y "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main"
+            sudo apt-get install -y clang-11
+            sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-11 100
+            sudo update-alternatives --set clang /usr/bin/clang-11
+            sudo update-alternatives --install /usr/bin/llvm-cov llvm-cov /usr/bin/llvm-cov-11 100
+          fi
+
+      - name: Set up environment
+        run: |
+          mkdir -p "${LOG_DIR}"
+          mkdir -p "${HOME}/bin"
+          echo "${HOME}/bin" >> $GITHUB_PATH
+          (
+          echo "LINUX_VERSION=$(uname -r)"
+          echo "NPROC=$(getconf _NPROCESSORS_ONLN)"
+          echo "SND_DUMMY_DIR=${HOME}/snd-dummy"
+          echo "TMPDIR=${{ runner.temp }}"
+
+          case "${{ matrix.features }}" in
+          tiny|small)
+            echo "TEST=testtiny"
+            if ${{ contains(matrix.extra, 'nogui') }}; then
+              echo "CONFOPT=--disable-gui"
+            fi
+            ;;
+          normal)
+            ;;
+          huge)
+            echo "TEST=scripttests test_libvterm"
+            echo "CONFOPT=--enable-perlinterp --enable-pythoninterp --enable-python3interp --enable-rubyinterp --enable-luainterp --enable-tclinterp"
+            ;;
+          esac
+
+          if ${{ matrix.coverage == true }}; then
+            echo "CFLAGS=--coverage -DUSE_GCOV_FLUSH"
+            echo "LDFLAGS=--coverage"
+          fi
+          if ${{ contains(matrix.extra, 'testgui') }}; then
+            echo "TEST=-C src testgui"
+          fi
+          if ${{ contains(matrix.extra, 'unittests') }}; then
+            echo "TEST=unittests"
+          fi
+          if ${{ contains(matrix.extra, 'asan') }}; then
+            echo "SANITIZER_CFLAGS=-g -O1 -DABORT_ON_INTERNAL_ERROR -DEXITFREE -fsanitize-recover=all -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer"
+            echo "ASAN_OPTIONS=print_stacktrace=1 log_path=${LOG_DIR}/asan"
+            echo "UBSAN_OPTIONS=print_stacktrace=1 log_path=${LOG_DIR}/ubsan"
+            echo "LSAN_OPTIONS=suppressions=${GITHUB_WORKSPACE}/src/testdir/lsan-suppress.txt"
+          fi
+          if ${{ contains(matrix.extra, 'vimtags') }}; then
+            echo "TEST=-C runtime/doc vimtags VIMEXE=../../${SRCDIR}/vim"
+          fi
+          ) >> $GITHUB_ENV
+
+      - name: Set up system
+        run: |
+          if [[ ${CC} = clang ]]; then
+            # Use llvm-cov instead of gcov when compiler is clang.
+            ln -fs /usr/bin/llvm-cov ${HOME}/bin/gcov
+          fi
+          # Setup lua5.3 manually since its package doesn't provide alternative.
+          # https://bugs.launchpad.net/ubuntu/+source/lua5.3/+bug/1707212
+          if [[ ${CONFOPT} =~ luainterp ]]; then
+            sudo update-alternatives --install /usr/bin/lua lua /usr/bin/lua5.3 10
+          fi
+          sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=0
+          sudo usermod -a -G audio "${USER}"
+          sudo bash ci/setup-xvfb.sh
+
+      - name: Cache snd-dummy
+        uses: actions/cache@v2
+        with:
+          path: ${{ env.SND_DUMMY_DIR }}
+          key: linux-${{ env.LINUX_VERSION }}-snd-dummy
+
+      - name: Set up snd-dummy
+        run: |
+          if [[ ! -e ${SND_DUMMY_DIR}/snd-dummy.ko ]]; then
+            bash ci/build-snd-dummy.sh
+          fi
+          cd "${SND_DUMMY_DIR}"
+          sudo insmod soundcore.ko
+          sudo insmod snd.ko
+          sudo insmod snd-pcm.ko
+          sudo insmod snd-dummy.ko
+
+      - name: Check autoconf
+        if: contains(matrix.extra, 'unittests')
+        run: |
+          make -C src autoconf
+
+      - name: Set up shadow dir
+        if: matrix.shadow
+        run: |
+          make -C src shadow
+          echo "SRCDIR=${{ matrix.shadow }}" >> $GITHUB_ENV
+          echo "SHADOWOPT=-C ${{ matrix.shadow }}" >> $GITHUB_ENV
+
+      - name: Configure
+        run: |
+          ./configure --with-features=${{ matrix.features }} ${CONFOPT} --enable-fail-if-missing
+          # Append various warning flags to CFLAGS.
+          # BSD sed needs backup extension specified.
+          sed -i.bak -f ci/config.mk.sed ${SRCDIR}/auto/config.mk
+          sed -i.bak -f ci/config.mk.${CC}.sed ${SRCDIR}/auto/config.mk
+
+      - name: Build
+        if: (!contains(matrix.extra, 'unittests'))
+        run: |
+          make ${SHADOWOPT} -j${NPROC}
+
+      - name: Check version
+        if: (!contains(matrix.extra, 'unittests'))
+        run: |
+          "${SRCDIR}"/vim --version
+          "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-1.vim -c quit
+          "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-2.vim -c quit
+
+      - name: Test
+        timeout-minutes: 20
+        run: |
+          do_test() { sg audio "sg $(id -gn) '$*'"; }
+          do_test make ${SHADOWOPT} ${TEST}
+
+      - name: Coveralls
+        if: matrix.coverage && success()
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+          COVERALLS_PARALLEL: true
+          TRAVIS_JOB_ID: ${{ github.run_id }}
+        run: |
+          sudo apt-get install -y python3-setuptools python3-wheel
+          # needed for https support for coveralls building cffi only works with gcc, not with clang
+          CC=gcc pip3 install --user cpp-coveralls pyopenssl ndg-httpsclient pyasn1
+          ~/.local/bin/coveralls -b "${SRCDIR}" -x .xs -e "${SRCDIR}"/if_perl.c -e "${SRCDIR}"/xxd -e "${SRCDIR}"/libvterm --encodings utf-8
+
+      - name: Codecov
+        if: matrix.coverage && success()
+        run: |
+          cd "${SRCDIR}" && bash <(curl -s https://codecov.io/bash)
+
+      - name: ASan logs
+        if: contains(matrix.extra, 'asan') && !cancelled()
+        run: |
+          for f in $(grep -lR '#[[:digit:]]* *0x[[:digit:]a-fA-F]*' "${LOG_DIR}"); do
+            asan_symbolize-11 -l "$f"
+            false # in order to fail a job
+          done
+
+  coveralls:
+    runs-on: ubuntu-latest
+
+    needs: linux
+    if: always()
+
+    steps:
+      - name: Parallel finished
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+        run: |
+          curl -k "https://coveralls.io/webhook?repo_token=${COVERALLS_REPO_TOKEN}" -d "payload[build_num]=${GITHUB_RUN_ID}&payload[status]=done"
+
+  macos:
+    runs-on: macos-latest
+
+    env:
+      CC: ${{ matrix.compiler }}
+      TEST: test
+      SRCDIR: ./src
+      LEAK_CFLAGS: -DEXITFREE
+      TERM: xterm
+
+    strategy:
+      fail-fast: false
+      matrix:
+        features: [tiny, huge]
+        compiler: [clang, gcc]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        env:
+          HOMEBREW_NO_AUTO_UPDATE: 1
+        run: |
+          brew install lua
+          echo "LUA_PREFIX=/usr/local" >> $GITHUB_ENV
+
+      - name: Set up environment
+        run: |
+          (
+          echo "NPROC=$(getconf _NPROCESSORS_ONLN)"
+          case "${{ matrix.features }}" in
+          tiny)
+            echo "TEST=testtiny"
+            echo "CONFOPT=--disable-gui"
+            ;;
+          huge)
+            echo "CONFOPT=--enable-perlinterp --enable-python3interp --enable-rubyinterp --enable-luainterp --enable-tclinterp"
+            ;;
+          esac
+          ) >> $GITHUB_ENV
+
+      - name: Configure
+        run: |
+          ./configure --with-features=${{ matrix.features }} ${CONFOPT} --enable-fail-if-missing
+          # Append various warning flags to CFLAGS.
+          # BSD sed needs backup extension specified.
+          sed -i.bak -f ci/config.mk.sed ${SRCDIR}/auto/config.mk
+          # On macOS, the entity of gcc is clang.
+          sed -i.bak -f ci/config.mk.clang.sed ${SRCDIR}/auto/config.mk
+
+      - name: Build
+        run: |
+          make -j${NPROC}
+
+      - name: Check version
+        run: |
+          "${SRCDIR}"/vim --version
+          "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-1.vim -c quit
+          "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-2.vim -c quit
+
+      - name: Test
+        timeout-minutes: 20
+        run: |
+          make ${TEST}
+
+  windows:
+    runs-on: windows-latest
+
+    env:
+      VCVARSALL: C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat
+      # Interfaces
+      # Lua
+      LUA_VER: 54
+      LUA_VER_DOT: '5.4'
+      LUA_RELEASE: 5.4.0
+      LUA32_URL: https://downloads.sourceforge.net/luabinaries/lua-%LUA_RELEASE%_Win32_dllw6_lib.zip
+      LUA64_URL: https://downloads.sourceforge.net/luabinaries/lua-%LUA_RELEASE%_Win64_dllw6_lib.zip
+      LUA_DIR: D:\Lua
+      # Python 2
+      PYTHON_VER: 27
+      PYTHON_VER_DOT: '2.7'
+      # Python 3
+      PYTHON3_VER: 38
+      PYTHON3_VER_DOT: '3.8'
+      # Other dependencies
+      # winpty
+      WINPTY_URL: https://github.com/rprichard/winpty/releases/download/0.4.3/winpty-0.4.3-msvc2015.zip
+      # Escape sequences
+      COL_RED: "\x1b[31m"
+      COL_GREEN: "\x1b[32m"
+      COL_YELLOW: "\x1b[33m"
+      COL_RESET: "\x1b[m"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        toolchain: [msvc, mingw]
+        arch: [x64, x86]
+        features: [HUGE, NORMAL]
+        include:
+          - arch: x64
+            vcarch: amd64
+            warch: x64
+            bits: 64
+            msystem: MINGW64
+            cygreg: registry
+            pyreg: ""
+          - arch: x86
+            vcarch: x86
+            warch: ia32
+            bits: 32
+            msystem: MINGW32
+            cygreg: registry32
+            pyreg: "-32"
+        exclude:
+          - toolchain: msvc
+            arch: x64
+            features: NORMAL
+          - toolchain: mingw
+            arch: x86
+            features: NORMAL
+
+    steps:
+      - name: Initalize
+        id: init
+        shell: bash
+        run: |
+          git config --global core.autocrlf input
+          python_dir=$(cat "/proc/${{ matrix.cygreg }}/HKEY_LOCAL_MACHINE/SOFTWARE/Python/PythonCore/${PYTHON_VER_DOT}/InstallPath/@")
+          python3_dir=$(cat "/proc/${{ matrix.cygreg }}/HKEY_LOCAL_MACHINE/SOFTWARE/Python/PythonCore/${PYTHON3_VER_DOT}${{ matrix.pyreg }}/InstallPath/@")
+          echo "PYTHON_DIR=$python_dir" >> $GITHUB_ENV
+          echo "PYTHON3_DIR=$python3_dir" >> $GITHUB_ENV
+
+      - uses: msys2/setup-msys2@v2
+        if: matrix.toolchain == 'mingw'
+        with:
+          msystem: ${{ matrix.msystem }}
+          release: false
+
+      - uses: actions/checkout@v2
+
+      - name: Create a list of download URLs
+        shell: cmd
+        run: |
+          type NUL > urls.txt
+          echo %LUA_RELEASE%>> urls.txt
+          echo %WINPTY_URL%>> urls.txt
+
+      - name: Cache downloaded files
+        uses: actions/cache@v2
+        with:
+          path: downloads
+          key: ${{ runner.os }}-${{ matrix.bits }}-${{ hashFiles('urls.txt') }}
+
+      - name: Download dependencies
+        shell: cmd
+        run: |
+          path C:\Program Files\7-Zip;%path%
+          if not exist downloads mkdir downloads
+
+          echo %COL_GREEN%Download Lua%COL_RESET%
+          call :downloadfile %LUA${{ matrix.bits }}_URL% downloads\lua.zip
+          7z x downloads\lua.zip -o%LUA_DIR% > nul || exit 1
+
+          echo %COL_GREEN%Download winpty%COL_RESET%
+          call :downloadfile %WINPTY_URL% downloads\winpty.zip
+          7z x -y downloads\winpty.zip -oD:\winpty > nul || exit 1
+          copy /Y D:\winpty\${{ matrix.warch }}\bin\winpty.dll        src\winpty${{ matrix.bits }}.dll
+          copy /Y D:\winpty\${{ matrix.warch }}\bin\winpty-agent.exe  src\
+
+          goto :eof
+
+          :downloadfile
+          :: call :downloadfile <URL> <localfile>
+          if not exist %2 (
+            curl -f -L %1 -o %2
+          )
+          if ERRORLEVEL 1 (
+            rem Retry once.
+            curl -f -L %1 -o %2 || exit 1
+          )
+          goto :eof
+
+      - name: Copy src directory to src2
+        shell: cmd
+        run: |
+          xcopy src src2\ /E > nul
+
+      - name: Build (MSVC)
+        if: matrix.toolchain == 'msvc'
+        shell: cmd
+        run: |
+          call "%VCVARSALL%" ${{ matrix.vcarch }}
+          cd src
+          :: Filter out the progress bar from the build log
+          sed -e "s/@<<$/@<< | sed -e 's#.*\\\\r.*##'/" Make_mvc.mak > Make_mvc2.mak
+          if "${{ matrix.features }}"=="HUGE" (
+            nmake -nologo -f Make_mvc2.mak ^
+              FEATURES=${{ matrix.features }} ^
+              GUI=yes IME=yes ICONV=yes VIMDLL=yes ^
+              DYNAMIC_LUA=yes LUA=%LUA_DIR% ^
+              DYNAMIC_PYTHON=yes PYTHON=%PYTHON_DIR% ^
+              DYNAMIC_PYTHON3=yes PYTHON3=%PYTHON3_DIR%
+          ) else (
+            nmake -nologo -f Make_mvc2.mak ^
+              FEATURES=${{ matrix.features }} ^
+              GUI=yes IME=yes ICONV=yes VIMDLL=yes
+          )
+          if not exist vim${{ matrix.bits }}.dll (
+            echo %COL_RED%Build failure.%COL_RESET%
+            exit 1
+          )
+
+      - name: Build (MinGW)
+        if: matrix.toolchain == 'mingw'
+        shell: msys2 {0}
+        run: |
+          cd src
+          if [ "${{ matrix.features }}" = "HUGE" ]; then
+            mingw32-make -f Make_ming.mak -j2 \
+              FEATURES=${{ matrix.features }} \
+              GUI=yes IME=yes ICONV=yes VIMDLL=yes \
+              DYNAMIC_LUA=yes LUA=${LUA_DIR} \
+              DYNAMIC_PYTHON=yes PYTHON=${PYTHON_DIR} \
+              DYNAMIC_PYTHON3=yes PYTHON3=${PYTHON3_DIR} \
+              STATIC_STDCPLUS=yes
+          else
+            mingw32-make -f Make_ming.mak -j2 \
+              FEATURES=${{ matrix.features }} \
+              GUI=yes IME=yes ICONV=yes VIMDLL=yes \
+              STATIC_STDCPLUS=yes
+          fi
+
+      #- name: Prepare Artifact
+      #  shell: cmd
+      #  run: |
+      #    mkdir artifacts
+      #    copy src\*vim.exe artifacts
+      #    copy src\vim*.dll artifacts
+      #
+      #- name: Upload Artifact
+      #  uses: actions/upload-artifact@v1
+      #  with:
+      #    name: vim${{ matrix.bits }}-${{ matrix.toolchain }}
+      #    path: ./artifacts
+
+      - name: Test
+        shell: cmd
+        timeout-minutes: 20
+        run: |
+          PATH %LUA_DIR%;C:\msys64\${{ matrix.msystem }}\bin;%PATH%;%PYTHON3_DIR%
+          call "%VCVARSALL%" ${{ matrix.vcarch }}
+          cd src
+          echo.
+          echo %COL_GREEN%vim version:%COL_RESET%
+          .\vim --version || exit 1
+
+          echo %COL_GREEN%Start testing vim in background.%COL_RESET%
+          start cmd /c "cd ..\src2\testdir & nmake -nologo -f Make_dos.mak VIMPROG=..\..\src\vim > nul & echo done>done.txt"
+
+          echo %COL_GREEN%Test gvim:%COL_RESET%
+          cd testdir
+          nmake -nologo -f Make_dos.mak VIMPROG=..\gvim || exit 1
+          cd ..
+
+          echo %COL_GREEN%Wait for vim tests to finish.%COL_RESET%
+          cd ..\src2\testdir
+          :: Wait about 10 minutes.
+          for /L %%i in (1,1,60) do (
+            if exist done.txt goto exitloop
+            timeout 10 > NUL 2>&1
+            if ERRORLEVEL 1 ping -n 11 localhost > NUL
+          )
+          set timeout=1
+          :exitloop
+
+          echo %COL_GREEN%Test results of vim:%COL_RESET%
+          if exist messages type messages
+          nmake -nologo -f Make_dos.mak report VIMPROG=..\..\src\vim || exit 1
+          if "%timeout%"=="1" (
+            echo %COL_RED%Timed out.%COL_RESET%
+            exit 1
+          )
diff --git a/.travis.yml b/.travis.yml
index b89f276..d60037c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -172,56 +172,56 @@
 # Linux: 2 compilers on some of the environments + gcc on os390
 jobs:
   include:
-    - <<: *osx
-      name: tiny-nogui/clang
-      compiler: clang
-      env: *tiny-nogui
-    - <<: *osx
-      name: tiny-nogui/gcc
-      compiler: gcc
-      env: *tiny-nogui
-    - <<: *osx
-      <<: *osx-homebrew
-      name: huge/clang
-      compiler: clang
-      env: *osx-huge
-    - <<: *osx
-      <<: *osx-homebrew
-      name: huge/gcc
-      compiler: gcc
-      env: *osx-huge
-    - <<: *linux
-      name: tiny-nogui/clang
-      compiler: clang
-      env: *tiny-nogui
-    - <<: *linux
-      name: tiny-nogui/gcc
-      compiler: gcc
-      env: *tiny-nogui
-    - <<: *linux
-      name: tiny/clang
-      compiler: clang
-      env: *tiny
-    - <<: *linux
-      name: tiny/gcc
-      compiler: gcc
-      env: *tiny
-    - <<: *linux
-      name: small/gcc
-      compiler: gcc
-      env: *small
-    - <<: *linux
-      name: normal+shadow/clang
-      compiler: clang
-      env:
-        - *normal
-        - *shadowopt
-    - <<: *linux
-      name: normal+shadow/gcc
-      compiler: gcc
-      env:
-        - *normal
-        - *shadowopt
+    #- <<: *osx
+    #  name: tiny-nogui/clang
+    #  compiler: clang
+    #  env: *tiny-nogui
+    #- <<: *osx
+    #  name: tiny-nogui/gcc
+    #  compiler: gcc
+    #  env: *tiny-nogui
+    #- <<: *osx
+    #  <<: *osx-homebrew
+    #  name: huge/clang
+    #  compiler: clang
+    #  env: *osx-huge
+    #- <<: *osx
+    #  <<: *osx-homebrew
+    #  name: huge/gcc
+    #  compiler: gcc
+    #  env: *osx-huge
+    #- <<: *linux
+    #  name: tiny-nogui/clang
+    #  compiler: clang
+    #  env: *tiny-nogui
+    #- <<: *linux
+    #  name: tiny-nogui/gcc
+    #  compiler: gcc
+    #  env: *tiny-nogui
+    #- <<: *linux
+    #  name: tiny/clang
+    #  compiler: clang
+    #  env: *tiny
+    #- <<: *linux
+    #  name: tiny/gcc
+    #  compiler: gcc
+    #  env: *tiny
+    #- <<: *linux
+    #  name: small/gcc
+    #  compiler: gcc
+    #  env: *small
+    #- <<: *linux
+    #  name: normal+shadow/clang
+    #  compiler: clang
+    #  env:
+    #    - *normal
+    #    - *shadowopt
+    #- <<: *linux
+    #  name: normal+shadow/gcc
+    #  compiler: gcc
+    #  env:
+    #    - *normal
+    #    - *shadowopt
     - <<: *linux
       arch: s390x
       name: huge/gcc-s390x
@@ -234,55 +234,55 @@
       compiler: gcc
       env: *linux-huge
       services: []
-    - <<: *linux
-      name: huge+coverage/clang
-      compiler: clang
-      env:
-        - *linux-huge
-        - *coverage
-      after_success: *eval-coverage
-    - <<: *linux
-      name: huge+coverage/gcc
-      compiler: gcc
-      env:
-        - *linux-huge
-        - *coverage
-      after_success: *eval-coverage
-    - <<: *linux # ASAN
-      name: huge+asan/clang
-      compiler: clang-11
-      addons:
-        apt:
-          sources:
-            - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main'
-              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
-          packages:
-            - *apt-packages
-            - clang-11
-      env:
-        - *linux-huge
-        - *asan
-      after_failure: *asan_symbolize
-    - <<: *linux
-      name: huge-testgui+coverage/gcc
-      compiler: gcc
-      env:
-        - *linux-huge
-        - *coverage
-        - TEST="-C src testgui"
-      after_success: *eval-coverage
-    - <<: *linux
-      name: unittests+coverage/gcc
-      compiler: gcc
-      env:
-        - *unittests
-        - *coverage
-      after_success: *eval-coverage
-    - <<: *linux
-      name: vimtags/gcc
-      compiler: gcc
-      env:
-        - *normal
-        - TEST="-C runtime/doc vimtags VIMEXE=../../${SRCDIR}/vim"
+    #- <<: *linux
+    #  name: huge+coverage/clang
+    #  compiler: clang
+    #  env:
+    #    - *linux-huge
+    #    - *coverage
+    #  after_success: *eval-coverage
+    #- <<: *linux
+    #  name: huge+coverage/gcc
+    #  compiler: gcc
+    #  env:
+    #    - *linux-huge
+    #    - *coverage
+    #  after_success: *eval-coverage
+    #- <<: *linux # ASAN
+    #  name: huge+asan/clang
+    #  compiler: clang-11
+    #  addons:
+    #    apt:
+    #      sources:
+    #        - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main'
+    #          key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+    #      packages:
+    #        - *apt-packages
+    #        - clang-11
+    #  env:
+    #    - *linux-huge
+    #    - *asan
+    #  after_failure: *asan_symbolize
+    #- <<: *linux
+    #  name: huge-testgui+coverage/gcc
+    #  compiler: gcc
+    #  env:
+    #    - *linux-huge
+    #    - *coverage
+    #    - TEST="-C src testgui"
+    #  after_success: *eval-coverage
+    #- <<: *linux
+    #  name: unittests+coverage/gcc
+    #  compiler: gcc
+    #  env:
+    #    - *unittests
+    #    - *coverage
+    #  after_success: *eval-coverage
+    #- <<: *linux
+    #  name: vimtags/gcc
+    #  compiler: gcc
+    #  env:
+    #    - *normal
+    #    - TEST="-C runtime/doc vimtags VIMEXE=../../${SRCDIR}/vim"
 
 # vim:set sts=2 sw=2 tw=0 et:
diff --git a/README.md b/README.md
index 2373f57..9f85416 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,15 @@
 ![Vim Logo](https://github.com/vim/vim/blob/master/runtime/vimlogo.gif)
 
+[![Github Build status](https://github.com/vim/vim/workflows/GitHub%20CI/badge.svg)](https://github.com/vim/vim/actions?query=workflow%3A%22GitHub+CI%22)
 [![Travis Build Status](https://travis-ci.org/vim/vim.svg?branch=master)](https://travis-ci.org/vim/vim)
 [![Appveyor Build status](https://ci.appveyor.com/api/projects/status/o2qht2kjm02sgghk?svg=true)](https://ci.appveyor.com/project/chrisbra/vim)
-[![Github Build status](https://github.com/vim/vim/workflows/GitHub%20CI/badge.svg)](https://github.com/vim/vim/actions?query=workflow%3A%22GitHub+CI%22)
 [![Cirrus Build Status](https://api.cirrus-ci.com/github/vim/vim.svg)](https://cirrus-ci.com/github/vim/vim)
 [![Coverage Status](https://codecov.io/gh/vim/vim/coverage.svg?branch=master)](https://codecov.io/gh/vim/vim?branch=master)
 [![Coverity Scan](https://scan.coverity.com/projects/241/badge.svg)](https://scan.coverity.com/projects/vim)
 [![Language Grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/vim/vim.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/vim/vim/context:cpp)
 [![Debian CI](https://badges.debian.net/badges/debian/testing/vim/version.svg)](https://buildd.debian.org/vim)
 [![Packages](https://repology.org/badge/tiny-repos/vim.svg)](https://repology.org/metapackage/vim)
+
 For translations of this README see the end.
 
 
diff --git a/ci/build-snd-dummy.sh b/ci/build-snd-dummy.sh
new file mode 100644
index 0000000..a2380b4
--- /dev/null
+++ b/ci/build-snd-dummy.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+set -eu
+
+LINUX_VERSION=$(uname -r | cut -d. -f1-2)
+LINUX_ARCHIVE_FILE=v${LINUX_VERSION}.tar.gz
+LINUX_SOURCE_DIR=linux-${LINUX_VERSION}
+
+mkdir -p "${TMPDIR}"
+cd "${TMPDIR}"
+
+wget -q "https://github.com/torvalds/linux/archive/${LINUX_ARCHIVE_FILE}"
+
+tar -xf "${LINUX_ARCHIVE_FILE}" "${LINUX_SOURCE_DIR}/sound"
+cd "${LINUX_SOURCE_DIR}/sound"
+
+CC=gcc make -C "/lib/modules/$(uname -r)/build" M="${PWD}" CONFIG_SOUND=m CONFIG_SND=m CONFIG_SND_PCM=m CONFIG_SND_DUMMY=m modules
+
+mkdir -p "${SND_DUMMY_DIR}"
+cp soundcore.ko core/snd.ko core/snd-pcm.ko drivers/snd-dummy.ko "${SND_DUMMY_DIR}"
diff --git a/ci/setup-xvfb.sh b/ci/setup-xvfb.sh
new file mode 100644
index 0000000..cfc0f97
--- /dev/null
+++ b/ci/setup-xvfb.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e
+
+apt-get install -y xvfb
+
+cat <<EOT >/etc/systemd/system/xvfb.service
+[Unit]
+Description=X Virtual Frame Buffer Service
+After=network.target
+[Service]
+ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24
+[Install]
+WantedBy=multi-user.target
+EOT
+
+systemctl enable xvfb.service
+systemctl start xvfb.service
diff --git a/src/version.c b/src/version.c
index 95633c8..86ccdd6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2150,
+/**/
     2149,
 /**/
     2148,