Add HDF5-Blosc2 to some Linux workflow

Author: franzpoeschel

.github/workflows/dependencies/install_hdf5_blosc2

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+cd /opt
+
+version="v2.0.0"
+patch_url="https://github.com/franzpoeschel/HDF5-Blosc2/commit/55b1feea7bf18a539dfbe4413a920bc9570aa0c6.diff"
+patch_path="$(pwd)/hdf5_blosc2_cmake_fixes.diff"
+
+curl -sLo "$patch_path" "$patch_url"
+git clone -b "$version" https://github.com/Blosc/HDF5-Blosc2
+cd HDF5-Blosc2
+git am "$patch_path"
+
+cmake . -B build -DCMAKE_INSTALL_PREFIX="/usr/local"
+cmake --build build --parallel 4 --target install

.github/workflows/linux.yml

@@ -241,6 +241,10 @@ jobs:
         sudo ln -s "$(which cmake)" /usr/bin/cmake
         eval $(spack env activate --sh .github/ci/spack-envs/gcc12_py36_ompi_h5_ad2/)
         spack install
+        ./.github/workflows/dependencies/install_hdf5_blosc2
+        # the HDF5 Blosc2 plugin exports no configuration files
+        # for build systems, so we will need to link it manually
+        export LDFLAGS="-lblosc2_filter $LDFLAGS"
 
         share/openPMD/download_samples.sh build
         cmake -S . -B build \