Update GitHub Actions CI file

closes #2301

.github/workflows/ci.yml

@@ -16,19 +16,22 @@ jobs:
 # minimum requirement is gcc 4.8
           - toolset: gcc-4.8
             cxxstd: "11"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: g++-4.8
             supported: true
 # gcc 4.9 not supported by beast
 # It dies with ICE when compiling
           - toolset: gcc-5
             cxxstd: "11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: g++-5
             supported: true
           - toolset: gcc-6
             cxxstd: "11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: g++-6
             supported: true
           - toolset: gcc-7
@@ -56,37 +59,43 @@ jobs:
           - toolset: clang
             compiler: clang++-3.6
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.6
             supported: true
           - toolset: clang
             compiler: clang++-3.7
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.7
             supported: true
           - toolset: clang
             compiler: clang++-3.8
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.8
             supported: true
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-3.9
             supported: true
           - toolset: clang
             compiler: clang++-4.0
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-4.0
             supported: true
           - toolset: clang
             compiler: clang++-5.0
             cxxstd: "11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-20.04
+            container: ubuntu:16.04
             install: clang-5.0
             supported: true
           - toolset: clang
@@ -141,16 +150,34 @@ jobs:
             os: macos-10.15
             supported: true
 
-    runs-on: ${{matrix.os}}
+    runs-on: ${{ matrix.os }}
+    container: ${{ matrix.container }}
 
     steps:
+      - name: Check if running in container
+        if: matrix.container != ''
+        run: echo "GHA_CONTAINER=${{ matrix.container }}" >> $GITHUB_ENV
+      - name: If running in container, upgrade packages
+        if: matrix.container != ''
+        run: |
+            apt-get -o Acquire::Retries=3 update && DEBIAN_FRONTEND=noninteractive apt-get -y install tzdata && apt-get -o Acquire::Retries=3 install -y sudo software-properties-common wget curl apt-transport-https make apt-file sudo unzip libssl-dev build-essential autotools-dev autoconf automake g++ libc++-helpers python ruby cpio gcc-multilib g++-multilib pkgconf python3 ccache libpython-dev locales
+            sudo apt-add-repository ppa:git-core/ppa
+            sudo apt-get -o Acquire::Retries=3 update && apt-get -o Acquire::Retries=3 -y install git
+            python_version=$(python3 -c 'import sys; print("{0.major}.{0.minor}".format(sys.version_info))')
+            sudo wget https://bootstrap.pypa.io/pip/$python_version/get-pip.py
+            sudo python3 get-pip.py
+            sudo /usr/local/bin/pip install cmake
       - uses: actions/checkout@v2
 
       - name: Install packages
         if: matrix.install
-        run: sudo apt install ${{matrix.install}}
+        run: |
+          for i in {1..3}; do sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test" && break || sleep 2; done
+          sudo apt-get update
+          sudo apt-get install -y ${{matrix.install}}
 
       - name: Setup Boost
+        shell: bash
         run: |
           if [[ $(uname) =~ [Ll]inux ]]; then
             echo Installing locales for ${TRAVIS_OS_NAME} ...
@@ -201,6 +228,7 @@ jobs:
           echo "using ${{matrix.toolset}} : : ${{matrix.compiler}} ;" >> ~/user-config.jam
 
       - name: Run tests
+        shell: bash
         run: |
           cd ../boost-root
           if [[ "${{matrix.supported}}" != "true" ]] ; then