first stab at gha-install-ncrystal.sh

tools/ci/gha-install-ncrystal.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -ex
+cd $HOME
+
+#Use the NCrystal develop branch (in the near future we can move this to master):
+git clone https://github.com/mctools/ncrystal --branch develop --single-branch --depth 1 ncrystal_src
+
+SRC_DIR="$PWD/ncrystal_src"
+BLD_DIR="$PWD/ncrystal_bld"
+INST_DIR="$PWD/ncrystal_inst"
+PYTHON=$(which python3)
+
+CPU_COUNT=1
+
+mkdir "$BLD_DIR"
+cd ncrystal_bld
+
+#cmake -Dstatic=on .. && make 2>/dev/null && sudo make install
+
+cmake \
+    "${SRC_DIR}" \
+    -DBUILD_SHARED_LIBS=ON \
+    -DNCRYSTAL_NOTOUCH_CMAKE_BUILD_TYPE=ON \
+    -DMODIFY_RPATH=OFF \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DBUILD_EXAMPLES=OFF \
+    -DINSTALL_SETUPSH=OFF \
+    -DEMBED_DATA=ON \
+    -DINSTALL_DATA=OFF \
+    -DNO_DIRECT_PYMODINST=ON \
+    -DPython3_EXECUTABLE="$PYTHON"
+
+make -j${CPU_COUNT:-1}
+make install
+
+#Note: There is no "make test" or "make ctest" functionality for NCrystal
+#      yet. If it appears in the future, we should add it here.
+
+
+#The next stuff is not pretty, but it is needed as a temporary
+#workaround until NCrystal add better support for system-wide
+#installations in CMake:
+
+cat <<EOF > ./findncrystallib.py
+import pathlib
+libname = pathlib.Path('./cfg_ncrystal_libname.txt').read_text().strip()
+libs = list(pathlib.Path("/usr").glob("**/lib*/**/%s"%libname))
+assert len(libs)==1
+pathlib.Path('ncrystal_liblocation.txt').write_text(str(libs[0]))
+EOF
+
+python3 ./findncrystallib.py
+
+TMPNCRYSTALLIBLOCATION=$(cat ./ncrystal_liblocation.txt)
+
+cat <<EOF > ./ncrystal_pypkg/NCrystal/_nclibpath.py
+#File autogenerated for working with systemwide install of NCrystal:
+import pathlib
+liblocation = pathlib.Path('${TMPNCRYSTALLIBLOCATION}'.strip())
+EOF
+
+$PYTHON -m pip install ./ncrystal_pypkg/ -vv