CONFIG: relocate WM_PROJECT definition in bashrc, cshrc

- locate where the user is less tempted to change it (#1515).
  It really should be considered an invariant environment variable.

STYLE: wmake -help information to stdout, die errors to stderr

etc/bashrc

@@ -39,11 +39,12 @@
 #         - local site-specific directory, uses WM_PROJECT_DIR/site if unset
 #
 # Note
-#     Changes made to this bashrc file may be lost with the next upgrade.
+#     Changes made to this file will be lost with the next upgrade.
 #
 #------------------------------------------------------------------------------
 
-export WM_PROJECT=OpenFOAM
+# [WM_PROJECT_VERSION] - A human-readable version name
+# A development version is often named 'com' - as in www.openfoam.com
 export WM_PROJECT_VERSION=com
 
 #------------------------------------------------------------------------------
@@ -67,7 +68,7 @@ export WM_PRECISION_OPTION=DP
 # = 32 | 64
 export WM_LABEL_SIZE=32
 
-# [WM_COMPILE_OPTION] - Optimised, debug, profiling, other:
+# [WM_COMPILE_OPTION] - Optimised(default), debug, profiling, other:
 # = Opt | Debug | Prof
 # Other is processor or packaging specific (eg, OptKNL)
 export WM_COMPILE_OPTION=Opt
@@ -82,6 +83,9 @@ export WM_MPLIB=SYSTEMOPENMPI
 #------------------------------------------------------------------------------
 # (advanced / legacy)
 
+# [WM_PROJECT] - This project is "OpenFOAM" - do not change
+export WM_PROJECT=OpenFOAM
+
 # [projectDir] - directory containing this OpenFOAM version.
 # \- When this file is located as $WM_PROJECT_DIR/etc/bashrc, the next lines
 #    should work when sourced by BASH or ZSH shells. If this however fails,

etc/cshrc

@@ -39,11 +39,12 @@
 #         - local site-specific directory, uses WM_PROJECT_DIR/site if unset
 #
 # Note
-#     Changes made to this cshrc file may be lost with the next upgrade.
+#     Changes made to this file will be lost with the next upgrade.
 #
 #------------------------------------------------------------------------------
 
-setenv WM_PROJECT OpenFOAM
+# [WM_PROJECT_VERSION] - A human-readable version name
+# A development version is often named 'com' - as in www.openfoam.com
 setenv WM_PROJECT_VERSION com
 
 #------------------------------------------------------------------------------
@@ -67,7 +68,7 @@ setenv WM_PRECISION_OPTION DP
 # = 32 | 64
 setenv WM_LABEL_SIZE 32
 
-# [WM_COMPILE_OPTION] - Optimised, debug, profiling, other:
+# [WM_COMPILE_OPTION] - Optimised(default), debug, profiling, other:
 # = Opt | Debug | Prof
 # Other is processor or packaging specific (eg, OptKNL)
 setenv WM_COMPILE_OPTION Opt
@@ -82,6 +83,9 @@ setenv WM_MPLIB SYSTEMOPENMPI
 #------------------------------------------------------------------------------
 # (advanced / legacy)
 
+# [WM_PROJECT] - This project is "OpenFOAM" - do not change
+setenv WM_PROJECT OpenFOAM
+
 # [projectDir] - directory containing this OpenFOAM version.
 # \- When this file is located as $WM_PROJECT_DIR/etc/cshrc, the next lines
 #    should work when sourced by CSH or TCSH shells. If this however fails,

wmake/wclean

@@ -46,7 +46,6 @@ usage() {
 
 Usage: $Script [OPTION] [dir]
        $Script [OPTION] target [dir [MakeDir]]
-
 options:
   -a | -all         Same as the 'all' target
   -s | -silent      Ignored - for compatibility with wmake

wmake/wmake

@@ -59,15 +59,12 @@
 Script="${0##*/}"           # Use 'Script' for error messages in wmakeFunctions
 . "${0%/*}/scripts/wmakeFunctions"              # Source wmake functions
 
-unset optHelpFull
-usage() {
-    exec 1>&2
-    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
+# Print help to stdout so that it can be captured
+printHelp() {
     cat<<HELP_HEAD
 
 Usage: $Script [OPTION] [dir]
        $Script [OPTION] target [dir [MakeDir]]
-
 options:
   -s | -silent      Quiet mode (does not echo commands)
   -a | -all         wmake all sub-directories, running Allwmake if present
@@ -77,7 +74,7 @@ options:
   -update           Update lnInclude dirs, dep files, remove deprecated files/dirs
 HELP_HEAD
 
-if [ "$optHelpFull" = true ]
+if [ -n "$1" ]
 then
 cat<<HELP_FULL
   -debug            Define c++DBUG='-DFULLDEBUG -g -O0' as override
@@ -123,6 +120,19 @@ HELP_TAIL
     exit 1
 }
 
+# Report error and exit
+die()
+{
+    exec 1>&2
+    echo
+    echo "Error encountered:"
+    while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
+    echo
+    echo "See '${0##*/} -help' for usage"
+    echo
+    exit 1
+}
+
 # Default make is the "make" in the path
 make="make"
 
@@ -149,11 +159,10 @@ while [ "$#" -gt 0 ]
 do
     case "$1" in
         -help-f*)   # Full help
-            optHelpFull=true
-            usage
+            printHelp -full
             ;;
         -h | -help*) # Short help
-            usage
+            printHelp
             ;;
         -s | -silent)
             export WM_QUIET=true
@@ -224,7 +233,7 @@ do
             break
             ;;
         -*)
-            usage "unknown option: '$1'"
+            die "unknown option: '$1'"
             ;;
         *)
             break