save and restore PATH and LD_LIBRARY_PATH, so that xdg-open can launch a native executable

cmake/packaging/linux_wrapper.sh

@@ -7,6 +7,11 @@ export LC_ALL=C
 BASEDIR="$(dirname "$0")"
 EXENAME="$(basename "$0")"
 
+# save old settings (for restoring them later)
+OLDPATH="${PATH}"
+OLDLDLIB="${LD_LIBRARY_PATH}"
+
+# prepend path to find our custom executables
 PATH="${BASEDIR}/bin:${PATH}"
 
 # append to LD_LIBRARY_PATH to prefer local (newer) libs
@@ -15,6 +20,8 @@ LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${BASEDIR}/lib"
 # set some environment variables for LAMMPS etc.
 LAMMPS_POTENTIALS="${BASEDIR}/share/lammps/potentials"
 MSI2LMP_LIBRARY="${BASEDIR}/share/lammps/frc_files"
-export LD_LIBRARY_PATH LAMMPS_POTENTIALS MSI2LMP_LIBRARY PATH
+
+# export everything
+export LD_LIBRARY_PATH LAMMPS_POTENTIALS MSI2LMP_LIBRARY PATH OLDPATH OLDLDLIB
 
 exec "${BASEDIR}/bin/${EXENAME}" "$@"

cmake/packaging/xdg-open

@@ -33,6 +33,11 @@
 #
 #---------------------------------------------
 
+# restore previously saved environment variables
+PATH="${OLDPATH}"
+LD_LIBRARY_PATH="${OLDLDLIB}"
+export PATH LD_LIBRARY_PATH
+
 NEW_LIBRARY_PATH="/usr/local/lib64"
 for s in $(echo $LD_LIBRARY_PATH | sed -e 's/:/ /g')
 do \

tools/lammps-gui/lammps-gui.appdata.xml

@@ -62,6 +62,8 @@
         Add warning dialog at the end of a run if I/O buffer usage is high.
         Apply fixes and code modernization suggested by clang-tidy
         Make selection of accelerator and threads consistent
+        Cache and restore PATH and LD_LIBRARY_PATH in linux-wrapper.sh
+          so that xdg-open can work with native executables
         Fix bug when recentering object in image viewer
         Fix crash when editing partially quoted strings
         Must delete variable when starting a new run, since we don't