STYLE: eliminate most use of _foamSource outside of the etc/ hierarchy

applications/utilities/mesh/conversion/Optional/Allwmake

 #!/bin/sh
-#
-# Build optional components (eg, may depend on third-party libraries)
 #------------------------------------------------------------------------------
 cd ${0%/*} || exit 1    # Run from this directory
 
+# Optional component: continue-on-error
+# - may not have third-party installed
+export WM_CONTINUE_ON_ERROR=true
+
 # Parse arguments for compilation (at least for error catching)
 . $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
 
-# Get version info and arch-path
-. $WM_PROJECT_DIR/etc/config.sh/functions
-_foamSource $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+warning="==> skip ccmio"
 
+if settings=$($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+then
+    . $settings
+else
+    echo "$warning (no config.sh/ccmio settings)"
+    exit
+fi
 
-# Build libccmio (.a|.so)
-$WM_THIRD_PARTY_DIR/makeCCMIO lib # libso
+# Build libccmio (.a|.so) - use static linkage for fewer issues
+$WM_THIRD_PARTY_DIR/makeCCMIO lib
 
 if [ -e $CCMIO_ARCH_PATH/include/libccmio/ccmio.h \
   -a \( -e $CCMIO_ARCH_PATH/lib/libccmio.a -o $FOAM_EXT_LIBBIN/libccmio.so \) ]
 then
     wmake $targetType ccm26ToFoam
+else
+    echo $warning
 fi
 
 #------------------------------------------------------------------------------

etc/config.sh/example/compiler

@@ -3,7 +3,7 @@
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
 #   \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
-#    \\/     M anipulation  |
+#    \\/     M anipulation  | Copyright (C) 2017 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM.
@@ -31,9 +31,10 @@
 #------------------------------------------------------------------------------
 
 # First load the standard versions, if necessary
-foamFile=$($WM_PROJECT_DIR/bin/foamEtcFile -mode o config.sh/compiler \
-               2>/dev/null)
-[ $? -eq 0 ] && _foamSource $foamFile
+if foamFile=$($WM_PROJECT_DIR/bin/foamEtcFile -mode o config.sh/compiler)
+then
+    . $foamFile
+fi
 unset foamFile
 
 
@@ -57,7 +58,7 @@ Gcc48u)
     export WM_CC='gcc-4.8'
     export WM_CXX='g++-4.8'
     ;;
-Icc)
+Icc*)
     # Example for ensuring that 3rd software uses the Icc compilers
     export WM_CC='icc'
     export WM_CXX='icpc'

etc/config.sh/functions

@@ -43,7 +43,7 @@ then
         do
             [ "$FOAM_VERBOSE" -a "$PS1" ] && echo "Sourcing: $1" 1>&2
             . $1
-          shift
+            shift
         done
     }
 

src/conversion/ccm/Allwmake

 #!/bin/sh
-# Build optional components (eg, may depend on third-party libraries)
-#------------------------------------------------------------------------------
 cd ${0%/*} || exit 1    # Run from this directory
 
+# Optional component: (eg, may depend on third-party libraries)
+
 # Parse arguments for compilation (at least for error catching)
 . $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
 
-. $WM_PROJECT_DIR/etc/config.sh/functions
-_foamSource $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+warning="==> skip optional libccm adapter"
 
-# Link with static libccmio only (possibly fewer issues)
+if settings=$($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+then
+    . $settings
+else
+    echo "$warning (no config.sh/ccmio settings)"
+    exit
+fi
 
-warning="==> skip optional libccm adapter"
 
+# Link with static libccmio only (possibly fewer issues)
 if [ -e $CCMIO_ARCH_PATH/include/libccmio/ccmio.h \
   -a -e $CCMIO_ARCH_PATH/lib/libccmio.a ]
 then