#---------------------------------*- sh -*-------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
#    \\/     M anipulation  | Copyright (C) 2016 OpenCFD Ltd.
#------------------------------------------------------------------------------
# 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/>.
#
# File
#     etc/tools/ThirdPartyFunctions
#
# Description
#     Functions for managing the third-party packages
#
#     Define the standard buildBASE and installBASE for the platform
#     Define WM_NCOMPPROCS always.
#------------------------------------------------------------------------------

# Define the normal build and prefix directories
buildBASE=$WM_THIRD_PARTY_DIR/build/$WM_ARCH$WM_COMPILER
installBASE=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER


#
# Mostly building without wmake
# - disable wmakeScheduler variables
# - use max number of cores for building
#
unset WM_HOSTS WM_SCHEDULER
if [ -r /proc/cpuinfo ]
then
    WM_NCOMPPROCS=$(egrep "^processor" /proc/cpuinfo | wc -l)
else
    WM_NCOMPPROCS=1
fi
export WM_NCOMPPROCS
# echo "Building on $WM_NCOMPPROCS cores"


#
# If WM_CONTINUE_ON_ERROR not set activate the shell option "stop on error"
#
if [ -z "${WM_CONTINUE_ON_ERROR}" ]
then
    set -e
fi


# Report error and exit
die()
{
    exec 1>&2
    echo
    echo "Error: see '${0##*/} -help' for usage"
    while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
    echo
    exit 1
}

# Test if it matches "*-none"
_foamIsNone()
{
    test "${1##*-}" = none
}

# Test if it matches "*-system"
_foamIsSystem()
{
    test "${1##*-}" = system
}


#
# try to locate cmake according to the CMAKE_PATH
# or just use what is found in the path
#
unset CMAKE_PATH # clear when first loaded
findCMake()
{
    local candidate
    local foundExe

    if [ -n "$CMAKE_PATH" ]
    then
        # check as directory
        if [ -d "$CMAKE_PATH" ]
        then
            for candidate in \
                $CMAKE_PATH/cmake \
                $CMAKE_PATH/bin/cmake \
            ;
            do
                if [ -f "$candidate" -a -x "$candidate" ]
                then
                    foundExe=$candidate
                    break
                fi
            done
        fi

        # check as file, include ThirdParty installation in the search
        if [ -z "$foundExe" ]
        then
            for candidate in \
                $CMAKE_PATH \
                $installBASE/$CMAKE_PATH/bin/cmake \
                $installBASE/cmake-$CMAKE_PATH/bin/cmake \
            ;
            do
                if [ -f "$candidate" -a -x "$candidate" ]
                then
                    foundExe=$candidate
                    break
                fi
            done
        fi

        if [ -n "$foundExe" ]
        then
            # Use absolute path
            if [ "${foundExe#/}" = "$foundExe" ]
            then
                foundExe="$(cd ${foundExe%/cmake} 2>/dev/null && pwd)/cmake"
            fi

            echo "Using cmake=$foundExe" 1>&2
            echo "$foundExe"
            return 0
        else
            cat << NOT_FOUND 1>&2
'cmake' not found under specified CMAKE_PATH
    CMAKE_PATH=$CMAKE_PATH
reverting to using command from path
NOT_FOUND
        fi
    fi

    # Default to use the path, try resolving (so we know what we are using)
    foundExe=$(command -v cmake 2> /dev/null) || foundExe=cmake
    echo "Using cmake=${foundExe:-NotFound}"  1>&2
    echo "${foundExe:-cmake}"
}


#
# try to locate qmake according to the QMAKE_PATH
# or just use what is found in the path
#
unset QMAKE_PATH # clear when first loaded
findQtMake()
{
    local candidate
    local foundExe

    if [ -n "$QMAKE_PATH" ]
    then
        # check as directory
        if [ -d "$QMAKE_PATH" ]
        then
            for candidate in \
                $QMAKE_PATH/qmake \
                $QMAKE_PATH/bin/qmake \
            ;
            do
                if [ -f "$candidate" -a -x "$candidate" ]
                then
                    foundExe=$candidate
                    break
                fi
            done
        fi

        # check as file, include ThirdParty installation in the search
        if [ -z "$foundExe" ]
        then
            for candidate in \
                $QMAKE_PATH \
                $installBASE/$QMAKE_PATH/bin/qmake \
                $installBASE/qt-$QMAKE_PATH/bin/qmake \
            ;
            do
                if [ -f "$candidate" -a -x "$candidate" ]
                then
                    foundExe=$candidate
                    break
                fi
            done
        fi

        if [ -n "$foundExe" ]
        then
            # Use absolute path
            if [ "${foundExe#/}" = "$foundExe" ]
            then
                foundExe="$(cd ${foundExe%/qmake} 2>/dev/null && pwd)/qmake"
            fi

            echo "Using qmake=$foundExe" 1>&2
            echo "$foundExe"
            return 0
        else
            cat << NOT_FOUND 1>&2
'qmake' not found under specified QMAKE_PATH
    QMAKE_PATH=$QMAKE_PATH
reverting to using command from path
NOT_FOUND
        fi
    fi

    # Default to use the path, try resolving (so we know what we are using)
    foundExe=$(command -v qmake 2> /dev/null) || foundExe=qmake
    echo "Using qmake=${foundExe:-NotFound}"  1>&2
    echo "${foundExe:-qmake}"
}


#
# Download file $1 from url $2 into download/ directory
#
downloadFile()
{
    [ "$#" -eq 2 ] || {
        echo "downloadFile called with incorrect number of arguments $@"
        return 1
    }

    local file="$1"
    local url="$2"

    if [ ! -e download/$file ]
    then
        mkdir -p download
        echo "downloading $tarFile from $url"
        ( cd download && wget --no-check-certificate $url -O $file )
    fi
}


#
# Copy Make/{files,options} from etc/wmakeFiles/PACKAGE
#
# $1 = PACKAGE
# $2 = TARGET DIRECTORY (optional)
cpMakeFiles()
{
    set +x

    [ "$#" -eq 1 -o "$#" -eq 2 ] || {
        echo "cpMakeFiles called with incorrect number of arguments $@"
        return 1
    }

    local pkg=$1
    local dst="${2:-.}"
    echo "cpMakeFiles" $pkg $dst

    wmakeFiles=$WM_THIRD_PARTY_DIR/etc/wmakeFiles/$pkg

    for i in $(cd $wmakeFiles && find . -type f)
    do
        d=${i%/*}   # dirname
        b=${i##*/}   # basename

        mkdir -p $dst/$d/Make 2>/dev/null

        # NOTE the behaviour of '-nt' can cause problems
        #
        # - bash, ksh, /usr/bin/test
        #   True, if file1 exists and file2 does not
        #
        # - dash, zsh (and maybe others)
        #   False, if file1 or file2 does not exist
        #
        if [ ! -e $dst/$d/Make/$b -o $wmakeFiles/$i -nt $dst/$d/Make/$b ]
        then
            cp $wmakeFiles/$i $dst/$d/Make/$b
        fi
    done

    set -x
}


#
# Apply source-code patch if possible.
# Patches are taken from etc/patches/PACKAGE
#
# $1 = PACKAGE
# $2 = TARGET DIRECTORY (optional)
applyPatch()
{
    [ "$#" -eq 1 -o "$#" -eq 2 ] || {
        echo "applyPatch called with incorrect number of arguments ($#): $@"
        return 1
    }

    local pkg="$1"
    local dst="${2:-.}"

    local patch="$WM_THIRD_PARTY_DIR/etc/patches/$pkg"
    local sentinel="PATCHED_DURING_OPENFOAM_BUILD"

    if [ -r "$patch" ]
    then
    (
        cd $dst || exit 1
        if [ -f "$sentinel" ]
        then
            echo "patch for $pkg was already applied"
        else
            echo "apply patch for $pkg"
            touch "$sentinel"
            patch -p1 < $patch 2>&1 | tee $sentinel
        fi
    )
    else
        echo "no patch found for $pkg"
    fi
}

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