#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | foam-extend: Open Source CFD
#  \\    /   O peration     | Version:     4.1
#   \\  /    A nd           | Web:         http://www.foam-extend.org
#    \\/     M anipulation  | For copyright notice see file Copyright
#------------------------------------------------------------------------------
# License
#     This file is part of foam-extend.
#
#     foam-extend 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.
#
#     foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmake
#
# Description
#     General, easy to use make system for multi-platform development.
#
#------------------------------------------------------------------------------
Script=${0##*/}

usage() {
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

Usage: $Script [OPTION] [dir]
       $Script [OPTION] target [dir [MakeDir]]

options:
  -s | -silent      Run make in 'silent' mode (do not echo commands)
  -a | -all         Run wmake in all subdirectories
  -h | -help        Print the usage


A general, easy-to-use make system for multi-platform development

The 'target' is a Makefile target:
    e.g., Make/linux64GccDPOpt/fvMesh.o

  or a special target:
    all       all subdirectories
    exe       build statically linked executable
    lib       build statically linked archive lib (.a)
    libso     build dynamically linked lib (.so)
    libo      build statically linked lib (.o)
    jar       build Java jar

USAGE
    exit 1
}


# Default make is the "make" in the path
make="make"


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

# Default to compiling the local target only
all=

while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -s | -silent)
        make="$make -s"
        shift
        ;;
    -a | -all | all)
        all="all"
        shift
        ;;
    -*)
        usage "unknown option: '$*'"
        ;;
    *)
        break
        ;;
    esac
done


#------------------------------------------------------------------------------
# Check environment variables
#------------------------------------------------------------------------------

for envar in WM_OPTIONS WM_LINK_LANGUAGE WM_DIR
do
    eval test "\$$envar" || {
        echo "$Script error: environment variable \$$envar not set" 1>&2
        exit 1
    }
done


# When compiling anything but a standalone exe WM_PROJECT and WM_PROJECT_DIR
# must be set
[ "$1" = exe -o \( "$WM_PROJECT" -a "$WM_PROJECT_DIR" \) ] || {
    echo "$Script error:" 1>&2
    echo "    environment variable \$WM_PROJECT or " \
         "\$WM_PROJECT_DIR not set" 1>&2
    echo "    while building project library" 1>&2
    exit 1
}


#------------------------------------------------------------------------------
# Select the version of make to be used
#------------------------------------------------------------------------------

make="make"

# set WM_NCOMPPROCS automatically when both WM_HOSTS and WM_SCHEDULER are set
if [ -z "$WM_NCOMPPROCS" -a -n "$WM_HOSTS" -a -n "$WM_SCHEDULER" ]
then
    WM_NCOMPPROCS=$(wmakeScheduler -count)
    [ $? -eq 0 ] || unset WM_NCOMPPROCS
fi

if [ "$WM_NCOMPPROCS" ]
then
    if [ "$WM_NCOMPPROCS" -gt 1 -a ! "$MAKEFLAGS" ]
    then
        lockDir=$HOME/.wmakeScheduler

        if [ -d $lockDir ]
        then
            rm -f $lockDir/*
        else
            mkdir -p $lockDir
        fi

        make="make --no-print-directory -j "$WM_NCOMPPROCS
    fi
fi


#------------------------------------------------------------------------------
# check arguments and change to the directory in which to run wmake
#------------------------------------------------------------------------------

unset dir makeOption
MakeDir=Make

if [ $# -ge 1 ]
then
    if [ -d "$1" ]
    then
        dir=$1
    else
        makeOption=$1
    fi

    if [ $# -ge 2 ]
    then
        dir=$2
    fi

    # alternative name for the Make sub-directory
    if [ $# -ge 3 ]
    then
        MakeDir=$3
    fi

    if [ "$dir" ]
    then
        cd $dir 2>/dev/null || {
            echo "$Script error: could not change to directory '$dir'" 1>&2
            exit 1
        }
    fi
fi


#------------------------------------------------------------------------------
# Recurse the application directories tree
#------------------------------------------------------------------------------

if [ "$all" = all ]
then
    if [ -e Allwmake ]
    then
        ./Allwmake
        exit $?
    elif [ ! -d $MakeDir ]
    then
        # FOAM_APPS=$(find . -maxdepth 1 \( -type d -a ! -name "." -a ! -name Optional -a ! -name Make \)  -printf "%f ")
        # avoid 'find' with '-printf' ... not entirely portable
        FOAM_APPS=$(for d in *; do [ -d "$d" -a "$d" != Optional -a "$d" != Make ] && echo "$d"; done | xargs)
        $make -k -f $WM_DIR/MakefileApps FOAM_APPS="$FOAM_APPS"
        exit $?
    fi
fi


#------------------------------------------------------------------------------
# Check the existance of the Make directory and files file
# If both exist, make the wmake derived files
#------------------------------------------------------------------------------

[ -d $MakeDir ] || {
    echo "$Script error: '$MakeDir' directory does not exist" 1>&2
    exit 1
}

[ -r $MakeDir/files ] || {
    echo "$Script error: file '$MakeDir/files' does not exist" 1>&2
    exit 1
}

# Spawn a sub-shell and unset MAKEFLAGS in that sub-shell to avoid
# files and options being built in parallel
(
    cd $MakeDir
    unset MAKEFLAGS
    make -s -f $WM_DIR/MakefileOptions
    make -s -f $WM_DIR/MakefileFiles allFiles
)


#------------------------------------------------------------------------------
# Check the $OBJECTS_DIR = $MakeDir/$WM_OPTIONS/objectFiles file
# was created successfully
#------------------------------------------------------------------------------

OBJECTS_DIR=$MakeDir/$WM_OPTIONS

[ -r $OBJECTS_DIR/objectFiles ] || {
    echo "$Script error: file '$OBJECTS_DIR/objectFiles' could not be created" 1>&2
    exit 1
}


#------------------------------------------------------------------------------
# Make the dependency files
#------------------------------------------------------------------------------

touch $OBJECTS_DIR/dontIncludeDeps

case "$makeOption" in
lib | libso | libo )
    $make -s -f $WM_DIR/Makefile MAKE_DIR=$MakeDir INCLUDE_DEPS=$OBJECTS_DIR/dontIncludeDeps lnInclude/uptodate
    ;;
esac

$make -s -f $WM_DIR/Makefile MAKE_DIR=$MakeDir INCLUDE_DEPS=$OBJECTS_DIR/dontIncludeDeps $OBJECTS_DIR/dependencies

retVal=$?
if [ $retVal -ne 0 ]
then
    exit $retVal
fi


#------------------------------------------------------------------------------
# make the object files and link
#------------------------------------------------------------------------------

cmd="$make -f $WM_DIR/Makefile MAKE_DIR=$MakeDir INCLUDE_DEPS=$OBJECTS_DIR/includeDeps $makeOption"
# echo "cmd=$cmd"
exec $cmd

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