#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2015-2016 OpenFOAM Foundation
#     Copyright (C) 2017-2022 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     wrmdep
#
# Usage
#     wrmdep [-a | -all | all] [file1 [..fileN]]
#     wrmdep [-o | -old] [[dir1 [..dirN]]
#     wrmdep -update
#
# Description
#     This is a catch-all script for pruning .dep files, depending on the
#     provided arguments.
#
#     [-a | -all | all] [file1 [.. fileN]]:
#     Remove all .dep files from the object directory tree corresponding to the
#     current source directory or remove only the .dep files referring to the
#     optionally specified file(s).  With the -a/-all/all option the .dep files
#     are removed for all platforms rather than just the current platform.
#
#     [-o | -old] [dir1 [.. dirN]]:
#     Remove *.dep files that are without a corresponding .C or .L source file.
#     This occurs when a directory has been moved.
#         - prints the questionable directory and *.dep file
#
#     -update:
#     Search all the "src" and "application" directories of the project for
#     broken symbolic links for source code files and then remove all .dep
#     files that relate to files that no longer exist.
#     Must be executed in the project top-level directory:
#         $WM_PROJECT_DIR.
#
#------------------------------------------------------------------------------
Script=${0##*/}             # Use 'Script' for error messages in wmakeFunctions
. ${0%/*}/scripts/wmakeFunctions        # Source wmake functions

usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE
Usage:

$Script [-a | -all | all] [file1 [..fileN]]

    Remove all .dep files or remove .dep files referring to <file>.
    With the 'all' option the .dep files are removed for all platforms
    rather than just the current platform ($WM_OPTIONS).

$Script [-o | -old] [dir1 [..dirN]]

    Remove *.dep files that are without a corresponding .C or .L file.
    This occurs when a directory has been moved.
      - prints the questionable directory and *.dep file

    Note: to remove empty directories, run: wclean empty

$Script -update

    Search "src" and "application" directories of the project for broken
    symbolic links for source code files and remove all .dep files related
    to files that no longer exist.
    Must be executed in the project top-level directory:
        $WM_PROJECT_DIR

USAGE
    exit 1
}


#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

# Default is for removing all .dep files in the current directory
rmdepMode=files

# Default to processing only the current platform
unset platform

while [ "$#" -gt 0 ]
do
    case "$1" in
    ('') ;;
    (- | --) shift; break ;;  # Stop option parsing

    -h | -help*)
        usage
        ;;
    -a | -all | all)    # All platforms
        platform=all
        ;;
    -o | -old)
        rmdepMode=oldFolders
        ;;
    -update)
        rmdepMode=updateMode
        ;;
    -*)
        usage "unknown option: '$1'"
        ;;
    *)
        break
        ;;
    esac
    shift
done

# Check environment variables
checkEnv


#------------------------------------------------------------------------------
case "$rmdepMode" in
files)

    #-------------------------------------------------------------------------
    # Remove the selected .dep files from the object tree
    #-------------------------------------------------------------------------

    objectsDir=$(findObjectDir .) || exit 1 # Fatal

    # With -a/-all option: replace the current platform with a wildcard
    if [ "$platform" = all ]
    then
        objectsDir=$(echo "$objectsDir" | sed "s%$WM_OPTIONS%*%")
    fi

    if [ "$#" -eq 0 ]
    then
        echo "Removing all .dep files ..." 1>&2
        find "$objectsDir" -name '*.dep' -type f -delete -print
    else
        echo "Removing .dep files for: $*" 1>&2
        for file
        do
            find "$objectsDir" -name '*.dep' -type f \
                -exec grep -q "$file" {} \; -delete -print
        done
    fi
    ;;

oldFolders)
    # Default is the current directory
    [ "$#" -gt 0 ] || set -- .

    echo "Removing dep files for non-existent source files ..." 1>&2

    for checkDir
    do
        objectsDir=$(findObjectDir "$checkDir")

        if [ -d "$objectsDir" ]
        then
            echo "    searching: $objectsDir" 1>&2
        else
            echo "    skipping non-dir: $objectsDir" 1>&2
            continue
        fi

        find "$objectsDir" -name '*.dep' -type f -print | while read depFile
        do
            sourceFile="$(depToSource "$depFile")"

            # Check C++ or Flex source file exists
            if [ ! -r "$sourceFile" ]
            then
                echo "    rm $depFile" 1>&2
                rm -f "$depFile" 2>/dev/null
            fi
        done
    done
    ;;

updateMode)
    if [ "$PWD" != "$WM_PROJECT_DIR" ]
    then
        echo "Cannot 'update', not in project top-level directory" 1>&2
        exit 1
    fi

    echo "Removing dep files for non-existent source files ..." 1>&2
    fileNameList=$(find -L src applications -name '*.[CHL]' -type l)

    for filePathAndName in $fileNameList
    do
        fileName=$(basename "$filePathAndName")
        for subdir in src applications
        do
            echo "    '$subdir': $fileName" 1>&2
            (cd $subdir && $Script -all "$fileName")
        done

        # Just in case, remove the symbolic link as the last step
        unlink "$filePathAndName"
    done
    ;;

esac

exit 0 # clean exit

#------------------------------------------------------------------------------