ENH: reduce wmake bootstrap dependencies

- remove make target for wmdep (flex-based scanner), which eliminates
  a bootstrap dependency on flex.

  As of OpenFOAM-v1806, wmdep has been superseded by wmdepend
  (ragel-based scanner).

- replace dirToString binary with shell/awk equivalent for simpler
  maintenance. The utility is very rarely used (auto scanning to
  create Make/files) so there is no performance difference.

wmake/scripts/dirToString

+#!/bin/sh
+#------------------------------------------------------------------------------
+# =========                 |
+# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+#  \\    /   O peration     |
+#   \\  /    A nd           | Copyright (C) 2019 OpenCFD Ltd.
+#    \\/     M anipulation  |
+#-------------------------------------------------------------------------------
+# License
+#     This file is part of OpenFOAM, licensed under GNU General Public License
+#     <http://www.gnu.org/licenses/>.
+#
+# Script
+#     dirToString
+#
+# Usage
+#     dirToString path/to/file
+#
+# Description
+#     Converts a directory path into a camelCase string.
+#     Leading [./] characters are stripped by default.
+#
+#     For example,
+#         input:  dir1/dir2/dir3
+#         output: dir1Dir2Dir3
+#
+#------------------------------------------------------------------------------
+usage() {
+    exec 1>&2
+    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
+    cat<<USAGE
+
+Usage: ${0##*/} [OPTION] dir
+
+options:
+  -no-strip         Do not ignore leading [./] characters
+  -strip            Ignore leading [./] characters (default)
+  -h, -help         Print the usage
+
+Converts a directory path into a camelCase string
+
+USAGE
+    exit 1
+}
+
+
+#------------------------------------------------------------------------------
+# Parse arguments and options
+#------------------------------------------------------------------------------
+
+optStrip=true
+
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+    # Print help
+    (-h | -help*)
+        usage
+        ;;
+    (-s | -strip)
+        optStrip=true
+        ;;
+    (-no-strip)
+        unset optStrip
+        ;;
+    (--)
+        shift
+        break
+        ;;
+    (*)
+        break
+        ;;
+    esac
+    shift
+done
+
+if [ -z "$optStrip" ]
+then
+    dirName="$1"
+else
+    # Ignore any leading ./ characters
+    dirName="$(echo ""$1"" | sed -e 's@^[./]*@@')"
+fi
+
+dirName=$(echo "$dirName" | \
+awk 'BEGIN{FS="";RS="/";ORS=""} {if (FNR>1) {$0=toupper(substr($0,1,1))substr($0,2)}} 1')
+
+echo "$dirName"
+
+#------------------------------------------------------------------------------

wmake/scripts/makeFiles

@@ -33,7 +33,8 @@
 #     Usage : makeFiles
 #
 #------------------------------------------------------------------------------
-dirToString="${WM_DIR:-$WM_PROJECT_DIR/wmake}/platforms/$WM_ARCH$WM_COMPILER/dirToString"
+scriptDir="${0%/*}"                     # The script dir
+dirToString="$scriptDir/dirToString"
 
 if [ -r Make/files ]
 then
@@ -60,7 +61,7 @@ do
         # Skip special directories
         ;;
     *)
-        echo "$(echo $dir | $dirToString -strip)  =  ${dir#./}"
+        echo "$($dirToString "$dir")  =  ${dir#./}"
         ;;
     esac
 done > Make/files
@@ -68,7 +69,7 @@ done > Make/files
 
 for file in $(find . -name "*.[cCylLfF]" -type f -print)
 do
-    pathName=$(echo ${file%/*} | $dirToString -strip)
+    pathName="$($dirToString "${file%/*}")"
 
     if [ -n "$pathName" ]
     then

wmake/src/Makefile

@@ -2,7 +2,7 @@
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
-#   \\  /    A nd           |
+#   \\  /    A nd           | Copyright (C) 2017-2019 OpenCFD Ltd.
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 #                           | Copyright (C) 2011-2016 OpenFOAM Foundation
@@ -62,8 +62,6 @@ include $(GENERAL_RULES)/general
 .PHONY: all clean
 
 all: \
-    $(WMAKE_BIN)/dirToString$(EXT_EXE) \
-    $(WMAKE_BIN)/wmkdep$(EXT_EXE) \
     $(WMAKE_BIN)/wmkdepend$(EXT_EXE)
 	@echo "built wmake-bin for $(WM_ARCH)$(WM_COMPILER)"
 
@@ -72,11 +70,6 @@ clean:
 	@rm -rf $(WMAKE_BIN) 2>/dev/null
 	@rmdir $(shell dirname $(WMAKE_BIN)) 2>/dev/null || true
 
-$(WMAKE_BIN)/dirToString$(EXT_EXE): dirToString.c
-	@mkdir -p $(WMAKE_BIN)
-	$(call QUIET_MESSAGE,compile,$(<F))
-	$E $(cc) $(cFLAGS) $(<F) -o $@
-
 $(WMAKE_BIN)/wmkdep$(EXT_EXE): wmkdep.l
 	@mkdir -p $(WMAKE_BIN)
 	$(call QUIET_MESSAGE,flex,$(<F))

wmake/src/dirToString.c

-/*----------------------------------------------------------------------------*\
- =========                   |
- \\      /   F ield          | OpenFOAM: The Open Source CFD Toolbox
-  \\    /    O peration      |
-   \\  /     A nd            | Copyright (C) 2017 OpenCFD Ltd.
-    \\/      M anipulation   |
--------------------------------------------------------------------------------
-                            | Copyright (C) 2011 OpenFOAM Foundation
--------------------------------------------------------------------------------
-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/>.
-
-Application
-    dirToString
-
-Description
-    Converts a directory path into a camelCase string.
-    e.g. dir1/dir2/dir3 becomes dir1Dir2Dir3
-
-Usage
-    echo dirName | dirToString
-
-    e.g.
-        using sh
-        baseDirName=$(echo $dir | $bin/dirToString -strip)
-
-        using csh
-        set baseDirName=`echo $dir | $bin/dirToString -strip`
-
-\*----------------------------------------------------------------------------*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-
-/* The executable name (for messages), without requiring access to argv[] */
-#define EXENAME  "dirToString"
-
-int main(int argc, char* argv[])
-{
-    int c;
-
-    if (argc > 1)
-    {
-        if (!strncmp(argv[1], "-h", 2))
-        {
-            /* Option: -h, -help */
-
-            fputs
-            (
-                "\nUsage: " EXENAME
-                " [-strip]\n\n"
-                "  -strip    ignore leading [./] characters.\n\n"
-                "Converts a directory path into a camelCase string\n\n",
-                stderr
-            );
-            return 0;
-        }
-
-        if (!strcmp(argv[1], "-s") || !strcmp(argv[1], "-strip"))
-        {
-            /* Option: -s, -strip */
-
-            while ((c=getchar()) != EOF && (c == '.' || c == '/'))
-            {
-                /* nop */
-            }
-
-            if (c == EOF)
-            {
-                return 0;
-            }
-
-            putchar(c);
-        }
-    }
-
-
-    int nextUpper = 0;
-    while ((c = getchar()) != EOF)
-    {
-        if (c == '/')
-        {
-            nextUpper = 1;
-        }
-        else if (nextUpper)
-        {
-            putchar(toupper(c));
-            nextUpper = 0;
-        }
-        else
-        {
-            putchar(c);
-        }
-    }
-
-    return 0;
-}
-
-
-/*****************************************************************************/