#----------------------------------*-sh-*--------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2011-2016 OpenFOAM Foundation
#     Copyright (C) 2017-2022 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# File
#     etc/config.sh/functions
#     - sourced by OpenFOAM-*/etc/bashrc
#
# Description
#     Shell functions and variables used when sourcing the OpenFOAM environment
#
#     Some functionality mirrored by bin/tools/lib-dir
#
# Defined Variables
#     WM_SHELL_FUNCTIONS  : tracking variable
#     foamClean           : path to bin/foamCleanPath
#     _foam_uname_s       : cache value for `uname -s`
#
# Defined Functions
#     _foamClean     : eval call to foamCleanPath for specific shell
#     _foamEcho      : silent/non-silent echo
#     _foamEtc       : resolve etc files (silent or verbose)
#     _foamAddPath   : prepend to PATH
#     _foamAddMan    : prepend to MANPATH
#     _foamAddLib    : prepend to {DY,FOAM_}LD_LIBRARY_PATH
#     _foamAddLibAuto: prepend to lib64/lib resolved name
#
#------------------------------------------------------------------------------

if [ -z "$WM_SHELL_FUNCTIONS" ]
then
    # Not previously loaded/defined - define now

    # Temporary environment variable to track loading/unloading of functions
    WM_SHELL_FUNCTIONS=loaded

    # Cleaning environment variables
    foamClean="$WM_PROJECT_DIR/bin/foamCleanPath"

    # Cache value for `uname -s`
    _foam_uname_s="$(uname -s 2>/dev/null)"

    # Cleaning environment variables
    unset -f _foamClean 2>/dev/null
    _foamClean()
    {
         foamVar_name="$1"
         shift
         eval "$($foamClean -sh-env="$foamVar_name" "$@")"
         unset foamVar_name
    }

    # Echo values to stderr when FOAM_VERBOSE is on, no-op otherwise
    # Source an etc file, possibly with some verbosity
    # - use eval to avoid intermediate variables (ksh doesn't have 'local')
    unset -f _foamEcho 2>/dev/null
    unset -f _foamEtc 2>/dev/null
    if [ -n "$FOAM_VERBOSE" ] && [ -n "$PS1" ]
    then
        _foamEcho() { echo "$@" 1>&2; }
        _foamEtc()  { eval "$("$WM_PROJECT_DIR"/bin/foamEtcFile -sh-verbose "$@")"; }
    else
        _foamEcho() { true; }
        _foamEtc()  { eval "$("$WM_PROJECT_DIR"/bin/foamEtcFile -sh "$@")"; }
    fi

    # Prepend PATH
    unset -f _foamAddPath 2>/dev/null
    _foamAddPath()
    {
        case "$1" in (/?*) export PATH="$1:$PATH" ;; esac
    }

    # Prepend MANPATH
    unset -f _foamAddMan 2>/dev/null
    _foamAddMan()
    {
        case "$1" in (/?*) export MANPATH="$1:$MANPATH" ;; esac
    }

    # Prepend LD_LIBRARY_PATH (DYLD_LIBRARY_PATH for Darwin)
    unset -f _foamAddLib 2>/dev/null
    if [ "${_foam_uname_s}" = Darwin ]
    then
        _foamAddLib()
        {
            case "$1" in (/?*)
            if [ -e "$1" ]
            then
                export FOAM_LD_LIBRARY_PATH="${1}${FOAM_LD_LIBRARY_PATH:+:}${FOAM_LD_LIBRARY_PATH}"
                export DYLD_LIBRARY_PATH="$FOAM_LD_LIBRARY_PATH"
            fi
            esac
        }
    else
        _foamAddLib()
        {
            case "$1" in (/?*)
                export LD_LIBRARY_PATH="${1}${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
            esac
        }
    fi


    # Prepend to LD_LIBRARY_PATH with additional checking
    # $1 = base directory for 'lib' or 'lib64'
    # $2 = fallback libname ('lib' or 'lib64')
    #
    # 0) Skip entirely if directory ends in "-none" or "-system".
    #    These special cases (disabled, system directories) should not require
    #    adjustment of LD_LIBRARY_PATH
    # 1) Check for dir/lib64 and dir/lib
    # 2) Use fallback if the previous failed
    #
    # Return 0 on success
    unset -f _foamAddLibAuto 2>/dev/null
    _foamAddLibAuto()
    {
        # Note ksh does not have 'local' thus these ugly variable names
        foamVar_prefix="$1"
        foamVar_end="${1##*-}"

        # Do not add (none) or a system directory
        if [ -z "$foamVar_prefix" ] || [ "$foamVar_end" = none ] || [ "$foamVar_end" = system ]
        then
            unset foamVar_prefix foamVar_end
            return 1
        elif [ -d "$foamVar_prefix" ]
        then
            for foamVar_end in lib$WM_COMPILER_LIB_ARCH lib
            do
                if [ -d "$foamVar_prefix/$foamVar_end" ]
                then
                    _foamAddLib "$foamVar_prefix/$foamVar_end"
                    unset foamVar_prefix foamVar_end
                    return 0
                fi
            done
        fi

        # Use fallback. Add without checking existence of the directory
        foamVar_end="$2"
        if [ -n "$foamVar_end" ]
        then
            case "$foamVar_end" in
            (/*)    # Absolute path
                _foamAddLib "$foamVar_end"
                ;;
            (*)     # Relative to prefix
                _foamAddLib "$foamVar_prefix/$foamVar_end"
                ;;
            esac
            unset foamVar_prefix foamVar_end
            return 0
        fi

        unset foamVar_prefix foamVar_end
        return 1    # Nothing set
    }


    #--------------------------------------------------------------------------
    # Avoid any ThirdParty settings that may have 'leaked' into the environment

    unset MPI_ARCH_PATH
    unset ADIOS_ARCH_PATH
    unset ADIOS1_ARCH_PATH
    unset ADIOS2_ARCH_PATH
    unset BOOST_ARCH_PATH
    unset CCMIO_ARCH_PATH
    unset CGAL_ARCH_PATH
    unset FFTW_ARCH_PATH
    unset GPERFTOOLS_ARCH_PATH
    unset GMP_ARCH_PATH
    unset MPFR_ARCH_PATH
    unset LLVM_ARCH_PATH
    unset MESA_ARCH_PATH
    unset METIS_ARCH_PATH
    unset SCOTCH_ARCH_PATH

else
    # Was previously loaded/defined - now unset

    unset -f _foamAddPath _foamAddMan _foamAddLib _foamAddLibAuto 2>/dev/null
    unset -f _foamClean _foamEcho _foamEtc 2>/dev/null
    unset foamClean
    unset _foam_uname_s
    unset WM_SHELL_FUNCTIONS

fi

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