Update README.md

README.md

@@ -6,7 +6,26 @@ This repository is for [SoLID](https://hallaweb.jlab.org/12GeV/SoLID) simulation
 
 It includes all codes of defining and running simulation, digitizing and analyzing results.
 
-It is a part of [solid_release](https://github.com/JeffersonLab/solid_release) which has prerequisites included
+It is a part of [solid_release](https://github.com/JeffersonLab/solid_release) which has prerequisites included. 
+
+compile and run
+--------
+Only support "tcsh" with NO special env variable set, which means clean .login and .cshrc
+
+Before compile or run, set up env by
+* "source set_solid" with all default value
+* or "source set_solid your_JLAB_VERSION your_JLAB_ROOT your_solid_gemc_location" with your values
+
+To compile
+* cd $SoLID_GEMC/source/$GEMC_VERSION/
+* scons OPT=1
+
+To run
+* cd $SoLID_GEMC/script/
+* solid_gemc solid_SIDIS_He3_full.gcard
+* solid_gemc solid_SIDIS_NH3_full.gcard
+* solid_gemc solid_PVDIS_LD2_full.gcard
+* solid_gemc solid_JPsi_LH2_full.gcard
 
 code structure
 --------
@@ -18,12 +37,16 @@ code structure
 * "source" source code of solid_gemc which add solid specific hit process routine and load gemc as library
 * "mod" some modification of original gemc code to fit solid need
 
-devel rule and how to contribute
+development rule and how to contribute
 --------
 * Use "master" branch as devel version and github release as production version
 * most small development will be done by "fork->modify->submit pull request" mode.
 * some major collaborative development can be done with "branch->modify->submit pull request" mode as needed 
 
-main log
---------
-Converting SoLID svn to github by Zhiwen Zhao 2018/11/30, details in [log_svn2git](https://github.com/JeffersonLab/solid_gemc/blob/master/log_svn2git)
+To keep the fork in sync, do this on your computer
+* git clone https://github.com/[your_github_name]/solid_gemc.git
+* git remote add upstream https://github.com/JeffersonLab/solid_gemc.git
+* git fetch upstream
+* git checkout master
+* git merge upstream/master
+* git push origin master