wclean: Added the target "empty", which removes empty directories

It will exit after removing the empty folders and it will not do the
other standard "wclean" operations.  This replaces the functionality
provided by "wrmdepold".

Patch provided by Bruno Santos

wmake/wclean

@@ -3,7 +3,7 @@
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
-#   \\  /    A nd           | Copyright (C) 2011-2014 OpenFOAM Foundation
+#   \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
 #    \\/     M anipulation  |
 #-------------------------------------------------------------------------------
 # License
@@ -40,17 +40,18 @@ Usage: $Script [OPTION] [dir]
        $Script [OPTION] target [dir [MakeDir]]
 
 options:
-  -s | -silent      ignored - for compatibility with wmake
-  -help             print the usage
+  -s | -silent      Ignored - for compatibility with wmake
+  -help             Print the usage
 
 Clean up the wmake control directory Make/\$WM_OPTIONS and remove the
 lnInclude directories generated for libraries.
 
 The targets correspond to a subset of the 'wmake' special targets:
-  all               all subdirectories, uses any Allwclean or Allclean
+  all               All subdirectories, uses any Allwclean or Allclean
                     files if they exist
   exe | lib | libo | libso
-                    clean Make, any *.dep files and lnInclude directories
+                    Clean Make, any *.dep files and lnInclude directories
+  empty             Remove empty sub-directories for the requested dir
 
 USAGE
     exit 1
@@ -67,7 +68,7 @@ do
     -h | -help)
         usage
         ;;
-    -s | -silent)    # ignored - for compatibility with wmake
+    -s | -silent)    # Ignored - for compatibility with wmake
         shift
         ;;
     -*)
@@ -81,7 +82,7 @@ done
 
 
 #------------------------------------------------------------------------------
-# check arguments and change to the directory in which to run wclean
+# Check arguments and change to the directory in which to run wclean
 #------------------------------------------------------------------------------
 
 unset dir targetType
@@ -97,10 +98,10 @@ then
         targetType=$1
     fi
 
-    # specified directory name:
+    # Specified directory name:
     [ $# -ge 2 ] && dir=$2
 
-    # specified alternative name for the Make sub-directory:
+    # Specified alternative name for the Make sub-directory:
     [ $# -ge 3 ] && MakeDir=$3
 
     if [ "$dir" ]
@@ -111,22 +112,40 @@ then
         }
     fi
 
-    # provide some feedback
+    # Provide some feedback
     echo "$Script ${dir:-./}"
 fi
 
 
+#------------------------------------------------------------------------------
+# Remove empty sub-directories and exit
+#------------------------------------------------------------------------------
+
+if [ "$targetType" = empty ]
+then
+    # Get sub-directories avoiding particular directories
+    for dir in $(find . -mindepth 1 -maxdepth 1 \
+                           -type d \( -name .git -prune -o -print \) )
+    do
+        echo "check dir: $dir"
+        find $dir -depth -type d -empty -exec rmdir {} \; -print
+    done
+
+    exit 0
+fi
+
+
 #------------------------------------------------------------------------------
 # Recurse the directories tree
 #------------------------------------------------------------------------------
 
 if [ "$targetType" = all ]
 then
-    if [ -e Allwclean ]       # consistent with Allwmake
+    if [ -e Allwclean ]       # Consistent with Allwmake
     then
         ./Allwclean
         exit $?
-    elif [ -e Allclean ]      # often used for tutorial cases
+    elif [ -e Allclean ]      # Often used for tutorial cases
     then
         ./Allclean
         exit $?
@@ -135,7 +154,7 @@ then
         for dir in `find . \( -type d -a -name Make \)`
         do
             echo $dir
-            $0 ${dir%/Make}   # parent directory - trim /Make from the end
+            $0 ${dir%/Make}   # Parent directory - trim /Make from the end
         done
     fi
 fi

wmake/wrmdepold

-#!/bin/sh
-#------------------------------------------------------------------------------
-# =========                 |
-# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
-#  \\    /   O peration     |
-#   \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
-#    \\/     M anipulation  |
-#-------------------------------------------------------------------------------
-# License
-#     This file is part of OpenFOAM.
-#
-#     OpenFOAM is free software: you can redistribute it and/or modify it
-#     under the terms of the GNU General Public License as published by
-#     the Free Software Foundation, either version 3 of the License, or
-#     (at your option) any later version.
-#
-#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
-#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-#     for more details.
-#
-#     You should have received a copy of the GNU General Public License
-#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
-#
-# Script
-#     wrmdepold
-#
-# Description
-#     Usage: wrmdepold [dir1 .. dirN]
-#
-#     Remove *.dep files that are without a corresponding .C or .L source file.
-#     This often occurs when a directory has been moved.
-#         - print questionable directory and the *.dep file
-#         - optionally remove empty directories
-#------------------------------------------------------------------------------
-Script=${0##*/}
-
-# Source the wmake functions
-. ${0%/*}/scripts/wmakeFunctions
-
-usage() {
-    exec 1>&2
-    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
-    cat<<USAGE
-Usage: $Script [OPTION] [dir1 .. dirN]
-options:
-  -rmdir      find and remove empty directories (recursively)
-
-Remove *.dep files that are without a corresponding .C or .L file.
-This often occurs when a directory has been moved.
-  - print questionable directory and file
-  - optionally remove empty directories
-
-USAGE
-    exit 1
-}
-
-
-#------------------------------------------------------------------------------
-# Parse arguments and options
-#------------------------------------------------------------------------------
-
-unset optRmdir
-
-# parse options
-while [ "$#" -gt 0 ]
-do
-    case "$1" in
-    -h | -help)
-        usage
-        ;;
-    -rmdir)
-        optRmdir=true
-        shift
-        ;;
-    -*)
-       usage "unknown option: '$*'"
-       ;;
-    *)
-       break
-       ;;
-    esac
-done
-
-# Check environment variables
-checkEnv
-
-
-#------------------------------------------------------------------------------
-#
-#------------------------------------------------------------------------------
-
-# Default is the current directory
-[ "$#" -gt 0 ] || set -- .
-
-for checkDir
-do
-    findObjectDir $checkDir
-
-    if [ -d $objectsDir ]
-    then
-        echo "Searching: $objectsDir"
-    else
-        echo "Skipping non-dir: $objectsDir"
-        continue
-    fi
-
-    find $objectsDir -name '*.dep' -print | while read depFile
-    do
-        depToSource $depFile
-
-        # Check C++ or Flex source file exists
-        if [ ! -r "$sourceFile" ];
-        then
-            echo "rm $depFile"
-            rm -f $depFile 2>/dev/null
-        fi
-    done
-
-    # Remove empty dirs
-    if [ "$optRmdir" ]
-    then
-        # get subdirs ourselves so we can avoid particular directories
-        for dir in $(find $objectsDir -mindepth 1 -maxdepth 1 -type d \( -name .git -prune -o -print \) )
-        do
-            echo "check dir: $dir"
-            find $dir -depth -type d -empty -exec rmdir {} \; -print
-        done
-    fi
-done
-
-
-# -----------------------------------------------------------------------------