BUG: Allclean removes platforms/ instead of build/ (closes #7)

- Now only cleans the build/ directory.

- Add -all, -current options etc for also removing platforms,
  if wishing a complete clean.

Allclean

@@ -4,7 +4,7 @@
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
 #   \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
-#    \\/     M anipulation  |
+#    \\/     M anipulation  | Copyright (C) 2016 OpenCFD Ltd.
 #------------------------------------------------------------------------------
 # License
 #     This file is part of OpenFOAM.
@@ -23,7 +23,7 @@
 #     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 #
 # Script
-#     AllClean
+#     Allclean
 #
 # Description
 #     Clean script for third-party applications and libraries
@@ -39,24 +39,115 @@ wmakeCheckPwd "$WM_THIRD_PARTY_DIR" || {
 }
 # . etc/tools/ThirdPartyFunctions
 #------------------------------------------------------------------------------
+Script=${0##*/}
 
+usage() {
+    exec 1>&2
+    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
+    cat<<USAGE
+Usage: $Script [OPTION] [<platform> [ ... <platformN> ]]
+options:
+  -all              remove all platforms directories.
+  -current          clean the current platform ($WM_OPTIONS).
+  -help             print the usage
 
-# clean various packages via 'distclean'
-for i in openmpi-*
+Cleanup intermediate build directories.
+Optionally remove specified platform(s) from the ThirdParty platforms
+directory $WM_THIRD_PARTY_DIR/platforms
+
+USAGE
+    exit 1
+}
+
+# Print help message
+if [ "$1" = "-h" -o "$1" = "-help" ]; then
+    usage
+fi
+
+#------------------------------------------------------------------------------
+
+# Clean various packages via 'distclean'
+for i in openmpi-* ADIOS-*
 do
-    [ -d "$i" ] && ( set -x; cd $i && make distclean )
+    [ -d "$i" ] && (
+        echo
+        echo "${i%/*}"
+        echo "    make distclean"
+        echo
+        cd $i && make distclean
+    )
 done
 
 
-# clean various packages via 'realclean'
+# Clean various packages via 'realclean'
 for i in scotch*/src
 do
-    [ -d "$i" ] && ( set -x; cd $i && make realclean )
+    [ -d "$i" ] && (
+        echo
+        echo "${i%/*}"
+        echo "    make realclean"
+        echo
+        cd $i && make realclean
+    )
 done
 
 
-# clean out-of-source build directories
-[ -d platforms ] && ( set -x; rm -rf platforms/* )
+# Clean out-of-source build directories
+if [ -d build ]
+then
+    echo
+    echo "Clean build/ directory"
+    rm -rf build/*
+fi
+
+# -----------------------------------------------------------------------------
+
+#
+# Clean platforms directories
+#
+if [ "$#" -ge 1 ]
+then
+    echo
+    echo "Clean platforms/sub-directories"
+fi
+
+removePlatform()
+{
+    local platform="$1"
+    if [ -n "$platform" -a -d "platforms/$platform" ]
+    then
+        echo
+        echo "Cleaning platform '$platform'"
+        \rm -rf "platforms/$platform"
+    else
+        echo
+        echo "Platform '$platform' not built"
+    fi
+}
+
 
+# Optionally cleanup platforms specified from the arguments
+while [ "$#" -ge 1 ]
+do
+    case "$1" in
+    -all)
+        echo
+        echo "Removing all platforms/sub-directories"
+        echo
+        \rm -rf platforms/*
+        break
+        ;;
+
+    -current)
+        echo "Current platform '$WM_OPTIONS'"
+        removePlatform "$WM_OPTIONS"
+        ;;
+
+    *)
+        removePlatform "$1"
+        ;;
+    esac
+    shift
+done
 
 #------------------------------------------------------------------------------