ENH: add 'subcommand' handling to wclean (#1693)

- wcleanBuild, wcleanPlatform now accessible as "wclean -build" and
  "wclean -platform", respectively

wmake/scripts/wclean-build

@@ -0,0 +1 @@
+wcleanObjects

wmake/scripts/wclean-platform

@@ -0,0 +1 @@
+wcleanObjects

wmake/scripts/wcleanObjects

@@ -12,10 +12,11 @@
 #     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
 #
 # Script
-#     wcleanBuild, wcleanPlatform
+#     wmake/scripts/wcleanObjects
+#     Backend for "wclean -build", "wclean -platform"
 #
 # Usage
-#     wcleanBuild <option | platform> [.. <option | platform>]
+#     wclean-build <option | platform> [.. <option | platform>]
 #
 # Description
 #     Deletes the specified 'build/' object files directories from the
@@ -34,10 +35,9 @@
 #     tutorials
 #
 #------------------------------------------------------------------------------
-Script="${0##*/}"
 targetDir=build   # Safe default - override based on script name
 
-case "$Script" in
+case "${0##*/}" in
 (*[Pp]latform*)
     targetDir=platforms
     ;;
@@ -57,15 +57,15 @@ usage() {
 Usage: ${0##*/} <option | platform> [.. <option | platform>]
 
 options:
-  -a, -all              Same as 'all'
-  -curr, -current       Use \$WM_OPTIONS ($WM_OPTIONS)
-  -comp, -compiler      Use \$WM_ARCH\$WM_COMPILER*  ($WM_ARCH$WM_COMPILER)
+  -a | -all             Same as 'all'
+  -curr | -current      Use \$WM_OPTIONS ($WM_OPTIONS)
+  -comp | -compiler     Use \$WM_ARCH\$WM_COMPILER*  ($WM_ARCH$WM_COMPILER)
   -compiler=NAME        Use \$WM_ARCH<NAME>*  ($WM_ARCH<NAME>*)
-  -h, -help             Print the usage
+  -h | -help            Print the usage
 
-
-Deletes the specified $targetDir/ object file directories from the project
-top-level $targetDir/ directory $WM_PROJECT_DIR.
+Deletes specified $targetDir object file directories from project top-level:
+Project:   $WM_PROJECT_DIR
+Directory: $targetDir/
 
 special platforms:
   all           Remove all platforms$extraText
@@ -90,7 +90,7 @@ done
 wmake -check-dir -quiet "$WM_PROJECT_DIR"     2>/dev/null || \
 wmake -check-dir -quiet "$WM_THIRD_PARTY_DIR" 2>/dev/null || \
 {
-cat<<ERROR
+    cat<<ERROR
 ${0##*/}: Error incorrect top-level directory
 
   Not in Project:     $WM_PROJECT_DIR

wmake/wclean

@@ -31,30 +31,51 @@
 # Usage
 #     wclean [OPTION] [dir]
 #     wclean [OPTION] target [dir [MakeDir]]
+#     wclean -subcommand ...
 #
 # Description
 #     Clean up the wmake control directory Make/\$WM_OPTIONS and remove the
 #     lnInclude directories generated for libraries.
 #
 #------------------------------------------------------------------------------
-Script="${0##*/}"           # Use 'Script' for error messages in wmakeFunctions
-. "${0%/*}"/scripts/wmakeFunctions              # Source wmake functions
+Script="${0##*/}"                   # Need 'Script' for wmakeFunctions messages
+scriptsDir="${0%/*}"/scripts        # wmake/scripts directory
+. "$scriptsDir"/wmakeFunctions      # Source wmake functions
 
 printHelp() {
-    cat<<HELP_INFO
+    cat<<HELP_HEAD
 
 Usage: $Script [OPTION] [dir]
        $Script [OPTION] target [dir [MakeDir]]
+       $Script -subcommand ...
+
 options:
   -a | -all         All subdirectories, uses Allwclean, Allclean if they exist
-  -s | -silent      Ignored - for compatibility with wmake
+  -s | -silent      Silent mode (ignored - for compatibility with wmake)
   -h | -help        Display short help and exit
   -help-full        Display full help and exit
 
+subcommands (wclean subcommand -help for more information):
+HELP_HEAD
+
+if [ -n "$1" ]
+then
+cat<<HELP_SUBCOMMANDS
+  -build           Remove specified build/ object directories
+  -platform        Remove specified platforms/ object directories
+HELP_SUBCOMMANDS
+else
+cat<<HELP_SUBCOMMANDS
+  -build -platform
+HELP_SUBCOMMANDS
+fi
+
+cat<<HELP_TAIL_COMMON
+
 Clean up the wmake control directory Make/\$WM_OPTIONS and remove the
 lnInclude directories generated for libraries.
 
-HELP_INFO
+HELP_TAIL_COMMON
 
 cat<<HELP_TAIL_FULL
 Special targets:
@@ -99,6 +120,19 @@ do
     -h | -help*) # Short help
         printHelp
         ;;
+
+    # Forward to scripts/wclean-build
+    -build) shift
+        exec "$scriptsDir/wclean-build" "$@"
+        exit $?
+        ;;
+
+    # Forward to scripts/wclean-platform
+    -platform*) shift
+        exec "$scriptsDir/wclean-platform" "$@"
+        exit $?
+        ;;
+
     -a | -all | all)
         targetType=all
         ;;

wmake/wcleanBuild

@@ -1 +0,0 @@
-scripts/wcleanObjects

wmake/wcleanPlatform

@@ -1 +0,0 @@
-scripts/wcleanObjects