Reduce architectures to x64 for both OSX and Ubuntu as x86 is supported for windows only

Author: sergregory

.github/workflows/build_wheels.yml

@@ -82,119 +82,7 @@ jobs:
         name: wheels
         path: wheelhouse/opencv*.whl
 
-
-  build_linux:
-    runs-on: ${{ matrix.os }}
-    defaults:
-      run:
-        shell: bash
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest]
-        python-version: [3.6, 3.7, 3.8, 3.9]
-        platform: [x86, x64]
-        with_contrib: [0, 1]
-        without_gui: [0, 1]
-        build_sdist: [0]
-
-    env:
-      ACTIONS_ALLOW_UNSECURE_COMMANDS: true
-      REPO_DIR: .
-      BUILD_COMMIT: master
-      PROJECT_SPEC: opencv-python
-      MB_PYTHON_VERSION: ${{ matrix.python-version }}
-      TRAVIS_PYTHON_VERSION: ${{ matrix.python-version }}
-      MB_ML_VER: 2014
-      NP_TEST_DEP: numpy
-      TRAVIS_BUILD_DIR: ${{ github.workspace }}
-      CONFIG_PATH: travis_config.sh
-      DOCKER_IMAGE: quay.io/skvark/manylinux2014_${PLAT}
-      USE_CCACHE: 1
-      UNICODE_WIDTH: 32
-      SDIST: ${{ matrix.build_sdist || 0}}
-      ENABLE_HEADLESS: ${{ matrix.without_gui }}
-      ENABLE_CONTRIB: ${{ matrix.with_contrib }}
-
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v2
-      with:
-        submodules: true
-        fetch-depth: 0
-
-    - name: Update submodules
-      run: |
-        git submodule update --remote
-
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-        architecture: ${{ matrix.platform }}
-
-    - name: Setup Environment variables
-      run: |
-        if [ "macos-latest" == "${{ matrix.os }}" ]; then echo "TRAVIS_OS_NAME=osx" >> $GITHUB_ENV; else echo "TRAVIS_OS_NAME=${{ matrix.os }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "TRAVIS_EVENT_TYPE=cron" >> $GITHUB_ENV; else echo "TRAVIS_EVENT_TYPE=${{ github.event_name }}" >> $GITHUB_ENV; fi
-        if [ "schedule" == "${{ github.event_name }}" ]; then echo "BUILD_COMMIT=master" >> $GITHUB_ENV; else echo "BUILD_COMMIT=$BUILD_COMMIT" >> $GITHUB_ENV; fi
-        if [ "x64" == "${{ matrix.platform }}" ]; then echo "PLAT=x86_64" >> $GITHUB_ENV; fi
-        if [ "x86" == "${{ matrix.platform }}" ]; then echo "PLAT=i686" >> $GITHUB_ENV; fi
-        echo "BUILD_DEPENDS=$(echo $NP_BUILD_DEP)" >> $GITHUB_ENV;
-        echo "TEST_DEPENDS=$(echo $NP_TEST_DEP)" >> $GITHUB_ENV;
-
-    - name: before install
-      run: |
-        set -e
-        if [[ $SDIST == 0 ]]; then
-          # Check out and prepare the source
-          # Multibuild doesn't have releases, so --depth would break eventually (see
-          # https://superuser.com/questions/1240216/server-does-not-allow-request-for-unadvertised)
-          git submodule update --init multibuild
-          source multibuild/common_utils.sh
-          # https://github.com/matthew-brett/multibuild/issues/116
-          if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export ARCH_FLAGS=" "; fi
-          source multibuild/travis_steps.sh
-          # This sets -x
-          # source travis_multibuild_customize.sh
-          echo $ENABLE_CONTRIB > contrib.enabled
-          echo $ENABLE_HEADLESS > headless.enabled
-          echo "end"
-          # Not interested in travis internal scripts' output
-        fi
-        set +x
-        # Build and package
-        set -x
-        ls
-        if [[ $SDIST == 1 ]]; then
-          python -m pip install --upgrade pip
-          python -m pip install scikit-build
-          python setup.py sdist
-        else
-          build_wheel $REPO_DIR $PLAT
-        fi
-        set +x
-        # Install and run tests
-        set -x
-        if [[ $SDIST == 1 ]]; then
-          echo "skipping tests because of sdist"
-          rc=0
-        else
-          install_run $PLAT && rc=$? || rc=$?
-        fi
-        set +x
-        #otherwise, Travis logic terminates prematurely
-        #https://travis-ci.community/t/shell-session-update-command-not-found-in-build-log-causes-build-to-fail-if-trap-err-is-set/817
-        trap ERR
-        test "$rc" -eq 0
-    - name: saving artifacts
-      uses: actions/upload-artifact@v2
-      with:
-        name: wheels
-        path: wheelhouse/opencv*.whl
-
-  build_macos:
+  build:
     runs-on: ${{ matrix.os }}
     defaults:
       run:
@@ -203,7 +91,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-latest]
+        os: [ubuntu-latest, macos-latest]
         python-version: [3.6, 3.7, 3.8, 3.9]
         platform: [x64]
         with_contrib: [0, 1]
@@ -387,7 +275,7 @@ jobs:
 
   release:
     if: startsWith(github.ref, 'refs/tags/v')
-    needs: [build_linux, build_macos, build-windows-x86_64, build_sdist]
+    needs: [build, build-windows-x86_64, build_sdist]
     runs-on: ubuntu-latest
     defaults:
       run: