BUG: cshell version was not sourcing prefs.csh

BUG: compilerInstall was getting overwritten in settings.{csh,sh}

etc/cshrc

@@ -74,7 +74,9 @@ alias _foamSource 'if ($?FOAM_VERBOSE && $?prompt) echo "Sourcing: \!*"; source
 
 # Add in preset user or site preferences:
 set foamPrefs=`$WM_PROJECT_DIR/bin/foamEtcFile prefs.csh`
-if ( $status == 0 ) _foamSource $foamPrefs
+if ( $status == 0 ) then
+    _foamSource $foamPrefs
+endif
 unset foamPrefs
 
 

etc/settings.csh

@@ -81,7 +81,7 @@ _foamAddLib  $FOAM_USER_LIBBIN
 # Select compiler installation
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # compilerInstall = OpenFOAM | system
-set compilerInstall=OpenFOAM
+if ( ! $?compilerInstall ) set compilerInstall=OpenFOAM
 
 switch ("$compilerInstall")
 case OpenFOAM:

etc/settings.sh

@@ -105,7 +105,7 @@ unset compilerBin compilerLib compilerMan
 # Select compiler installation
 # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # compilerInstall = OpenFOAM | system
-compilerInstall=OpenFOAM
+: ${compilerInstall:=OpenFOAM}
 
 case "${compilerInstall:-OpenFOAM}" in
 OpenFOAM)