CI: Test on Ubuntu 20.04 (#1408)

Transition the Ubuntu OS from 18 to 20 LTS.
Time to finally drop clang 6 🎉

Author: ax3l

…s/clang6_nopy_nompi_h5_libcpp/spack.yaml …s/clang7_nopy_nompi_h5_libcpp/spack.yaml.github/ci/spack-envs/clang6_nopy_nompi_h5_libcpp/spack.yaml renamed to .github/ci/spack-envs/clang7_nopy_nompi_h5_libcpp/spack.yaml .github/ci/spack-envs/clang6_nopy_nompi_h5_libcpp/spack.yaml renamed to .github/ci/spack-envs/clang7_nopy_nompi_h5_libcpp/spack.yaml

@@ -12,7 +12,7 @@ spack:
     all:
       target: [x86_64]
       variants: ~mpi ~fortran
-      compiler: [clang@6.0.0]
+      compiler: [clang@7.0.1]
 
   compilers:
   - compiler:
@@ -22,13 +22,13 @@ spack:
         cxxflags: -stdlib=libc++
         ldflags: -stdlib=libc++
       modules: []
-      operating_system: ubuntu18.04
+      operating_system: ubuntu20.04
       paths:
-        cc: /usr/lib/llvm-6.0/bin/clang
-        cxx: /usr/lib/llvm-6.0/bin/clang++
+        cc: /usr/bin/clang-7
+        cxx: /usr/bin/clang++-7
         f77: null
         fc: null
-      spec: clang@6.0.0
+      spec: clang@7.0.1
       target: x86_64
 
   config:

…py_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml …py_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml.github/ci/spack-envs/clang6_nopy_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml renamed to .github/ci/spack-envs/clang7_nopy_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml .github/ci/spack-envs/clang6_nopy_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml renamed to .github/ci/spack-envs/clang7_nopy_ompi_h5_ad1_ad2_bp3_libcpp/spack.yaml

@@ -41,7 +41,7 @@ spack:
       variants: ~fortran
       providers:
         mpi: [openmpi]
-      compiler: [clang@6.0.0]
+      compiler: [clang@7.0.1]
 
   compilers:
   - compiler:
@@ -51,13 +51,13 @@ spack:
         cxxflags: -stdlib=libc++
         ldflags: -stdlib=libc++
       modules: []
-      operating_system: ubuntu18.04
+      operating_system: ubuntu20.04
       paths:
-        cc: /usr/lib/llvm-6.0/bin/clang
-        cxx: /usr/lib/llvm-6.0/bin/clang++
+        cc: /usr/bin/clang-7
+        cxx: /usr/bin/clang++-7
         f77: /usr/bin/gfortran
         fc: /usr/bin/gfortran
-      spec: clang@6.0.0
+      spec: clang@7.0.1
       target: x86_64
 
   config:

.github/ci/spack-envs/gcc7_py36_ompi_h5_ad1_ad2/spack.yaml

@@ -47,7 +47,7 @@ spack:
       extra_rpaths: []
       flags: {}
       modules: []
-      operating_system: ubuntu18.04
+      operating_system: ubuntu20.04
       paths:
         cc: /usr/bin/gcc-7
         cxx: /usr/bin/g++-7

.github/workflows/linux.yml

@@ -7,26 +7,26 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  clang6_nopy_nompi_h5_libcpp:
-    runs-on: ubuntu-18.04
+  clang7_nopy_nompi_h5_libcpp:
+    runs-on: ubuntu-20.04
     if: github.event.pull_request.draft == false
     steps:
     - uses: actions/checkout@v3
     - name: Spack Cache
       uses: actions/cache@v3
-      with: {path: /opt/spack, key: clang6_nopy_nompi_h5_libcpp_v2 }
+      with: {path: /opt/spack, key: clang7_nopy_nompi_h5_libcpp_v2}
     - name: Install
       run: |
         sudo apt-get update
-        sudo apt-get install clang-6.0 libc++-dev libc++abi-dev
+        sudo apt-get install clang-7 libc++-7-dev libc++abi-7-dev
         sudo .github/workflows/dependencies/install_spack
     - name: Build
-      env: {CC: clang-6.0, CXX: clang++-6.0, CXXFLAGS: -stdlib=libc++ -Werror -Wno-ignored-attributes -Wno-unused-const-variable}
+      env: {CC: clang-7, CXX: clang++-7, CXXFLAGS: -stdlib=libc++ -Werror -Wno-ignored-attributes -Wno-unused-const-variable}
         # -Wno-ignored-attributes -Wno-unused-const-variable: clang-6 has a
         #   false positive on src/auxiliary/Filesystem.cpp
         #   [[maybe_unused]] MPI_Datatype const MPI_Types< unsigned >::value = MPI_UNSIGNED;
       run: |
-        eval $(spack env activate --sh .github/ci/spack-envs/clang6_nopy_nompi_h5_libcpp/)
+        eval $(spack env activate --sh .github/ci/spack-envs/clang7_nopy_nompi_h5_libcpp/)
         spack install
 
         share/openPMD/download_samples.sh build
@@ -39,21 +39,21 @@ jobs:
         cmake --build build --parallel 2
         ctest --test-dir build --output-on-failure
 
-  clang6_nopy_ompi_h5_ad1_ad2_bp3_libcpp:
-    runs-on: ubuntu-18.04
+  clang7_nopy_ompi_h5_ad1_ad2_bp3_libcpp:
+    runs-on: ubuntu-20.04
     if: github.event.pull_request.draft == false
     steps:
     - uses: actions/checkout@v3
     - name: Spack Cache
       uses: actions/cache@v3
-      with: {path: /opt/spack, key: clang6_nopy_ompi_h5_ad1_ad2_bp3_libcpp_v2 }
+      with: {path: /opt/spack, key: clang7_nopy_ompi_h5_ad1_ad2_bp3_libcpp_v2}
     - name: Install
       run: |
         sudo apt-get update
-        sudo apt-get install clang-6.0 libc++-dev libc++abi-dev gfortran libopenmpi-dev python3
+        sudo apt-get install clang-7 libc++-7-dev libc++abi-7-dev gfortran libopenmpi-dev python3
         sudo .github/workflows/dependencies/install_spack
     - name: Build
-      env: {CC: clang-6.0, CXX: clang++-6.0, CXXFLAGS: -stdlib=libc++ -Werror -Wno-ignored-attributes -Wno-unused-const-variable}
+      env: {CC: clang-7, CXX: clang++-7, CXXFLAGS: -stdlib=libc++ -Werror -Wno-ignored-attributes -Wno-unused-const-variable}
         # -Wno-ignored-attributes -Wno-unused-const-variable: clang-6 has a
         #   false positive on src/auxiliary/Filesystem.cpp
         #   [[maybe_unused]] MPI_Datatype const MPI_Types< unsigned >::value = MPI_UNSIGNED;
@@ -62,7 +62,7 @@ jobs:
         mpiexec --version
         perl --version
         python --version
-        eval $(spack env activate --sh .github/ci/spack-envs/clang6_nopy_ompi_h5_ad1_ad2_bp3_libcpp/)
+        eval $(spack env activate --sh .github/ci/spack-envs/clang7_nopy_ompi_h5_ad1_ad2_bp3_libcpp/)
         spack install
 
         share/openPMD/download_samples.sh build
@@ -202,7 +202,7 @@ jobs:
 #  gcc-7.4.0_py_ompi_h5_ad1_ad2_coveralls
 
   gcc7_py36_pd_dd_ompi_h5_ad1_ad2:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     if: github.event.pull_request.draft == false
     steps:
     - uses: actions/checkout@v3