Add instructions for faser-common

README.md

@@ -5,6 +5,10 @@ The following sequence will allow you to compile Calypso 1.0.0 on any machine wi
 #clone the (forked) project to your local machine
 git clone https://:@gitlab.cern.ch:8443/$USERNAME/calypso.git 
 
+# You also need to add faser-common as a submodule
+cd calypso
+git submodule add https://:@gitlab.cern.ch:8443/faser/faser-common.git
+cd ..
 
 #The next three lines are used to setup the ATLAS release environment
 export ATLAS_LOCAL_ROOT_BASE=/cvmfs/atlas.cern.ch/repo/ATLASLocalRootBase 
@@ -14,7 +18,11 @@ asetup --input=calypso/asetup.faser master,latest,Athena
 #create build directory
 mkdir build
 cd build
+
 #build calypso
 cmake -DCMAKE_INSTALL_PREFIX=../run ../calypso ; make ; make install
 
-It can be convenient to alias the "asetup --input=calypso/asetup.faser" to something like "fsetup"
+It can be convenient to alias the "asetup --input=calypso/asetup.faser" to something like "fsetup"
\ No newline at end of file
+
+Note that in order for CI/CD to work properly on your gitlab fork of calypso, you will also need to fork the faser-common project.  To avoid having to keep this fork up to date, you can set it up to mirror from the master in gitlab.  Once you have forked the project in gitlab from https://gitlab.cern.ch/faser/faser-common, navigate to to Settings / Repository menu and select "Mirroring repositories" to set up a (Pull) mirror to keep this fork up to date.
+