#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
#    \\/     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
#     rmdepold
#
# Description
#     Usage: rmdepold [dir1 .. dirN]
#
#     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 the *.dep file
#         - optionally remove empty directories
#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE
Usage: ${0##*/} [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
}

unset optRmdir

# parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -rmdir)
        optRmdir=true
        shift
        ;;
    -*)
       usage "unknown option: '$*'"
       ;;
    *)
       break
       ;;
    esac
done

# default is the current directory
[ "$#" -gt 0 ] || set -- .

for checkDir
do
    if [ -d $checkDir ]
    then
        echo "searching: $checkDir"
    else
        echo "skipping non-dir: $checkDir"
        continue
    fi

    find $checkDir -name '*.dep' -print | while read depFile
    do
        # check C++ and Flex files
        if [ ! -r "${depFile%dep}C" -a ! -r "${depFile%dep}L" ];
        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 $checkDir -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
# -----------------------------------------------------------------------------