Update README instruction - CAVEAT GeoModelIO working branch is master-specialshape-geomodelg4

README.md

@@ -2,8 +2,68 @@
 
 GeoModelG4 contains tools to interface GeoModel with the [Geant4](https://geant4.web.cern.ch) detector simulation toolkit.
 
+# Installation
+
+## Dependencies:
+
+## Geant4:
+
+Before installing Geant4, check at the Geant4 website the pre-requisites needed:
+http://geant4-userdoc.web.cern.ch/geant4-userdoc/UsersGuides/InstallationGuide/html/gettingstarted.html
+Note in particular that to enable the use of geometry reading/writing from GDML XML files, the Xerces-C++ headers and library >=3 must be installed.
+Clone the repository at this [address](https://gitlab.cern.ch/geant4/geant4.git), then:
+
+```bash
+git clone https://gitlab.cern.ch/geant4/geant4.git
+cd geant4
+git tag
+```
+Choose the release you want to use, i.e. Geant4-10.6.0, and checkout the corresponding tag:
+
+```bash
+git checkout tags/v10.6.0
+mkdir build ; cd build
+cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=Release ../  -DGEANT4_INSTALL_DATA=ON -DGEANT4_USE_GDML=ON -GEANT4_BUILD_MULTITHREADED=ON
+make
+make install
+```
+
+## GeoModelCore:
+
+Clone the repository at this [address](https://gitlab.cern.ch/GeoModelDev/GeoModelCore), then:
+
+```bash
+git clone https://gitlab.cern.ch/GeoModelDev/GeoModelCore.git
+cd GeoModelCore
+mkdir build ; cd build
+cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=Release ../
+make
+make install
+```
+## GeoModelIO:
+
+Clone the repository at this [address](https://gitlab.cern.ch/GeoModelDev/GeoModelIO).
+CAVEAT: at the moment the working branch of GeoModelIO compatible with GeoModel2G4 and FullSimLight is: [address](https://gitlab.cern.ch/GeoModelDev/GeoModelIO/tree/master-specialshape-geomodelg4)
+
+```bash
+git clone https://gitlab.cern.ch/GeoModelDev/GeoModelIO.git
+cd GeoModelIO
+git checkout master-specialshape-geomodelg4
+mkdir build ; cd build
+cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=Release ../
+make
+make install
+```
+
+## GeoModelG4:
+
+Clone the repository at this [address](https://gitlab.cern.ch/GeoModelDev/GeoModelG4), then:
+
 ```bash
-cmake -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_BUILD_TYPE=RelWithDebInfo ../GeoModelG4/
+git clone https://gitlab.cern.ch/GeoModelDev/GeoModelG4.git
+cd GeoModelG4
+mkdir build ; cd build
+cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=Release ../
 make
 make install
 ```
@@ -11,12 +71,12 @@ make install
 **NOTE:** If you experience issues with CMake not finding Geant4 properly, try to pass the Geant4 lib installation dir to CMake, to let it correctly find the Geant4Config.cmake file:
 
 ```bash
-cmake -DGeant4_DIR=<path_to_geant4_install_dir>/lib/Geant4-10.5.0/ -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_BUILD_TYPE=RelWithDebInfo ../GeoModelG4/
+cmake -DGeant4_DIR=<path_to_geant4_install_dir>/lib/Geant4-10.5.0/ -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=RelWithDebInfo ../
 ```
 
 Alternatively, you can source the Geant4 setup, before running cmake:
 
 ```bash
 source <path_to_geant4_install_dir>/bin/geant4.sh
-cmake -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_BUILD_TYPE=RelWithDebInfo ../GeoModelG4
+cmake -DCMAKE_INSTALL_PREFIX=../../install -DCMAKE_BUILD_TYPE=RelWithDebInfo ../
 ```