#! /bin/sh
#
# this script automatically downloads and copies the portaudio library for Pd
#
# uses git master version by default, set checkout branch/tag/commit using
# first argument:
#
#    ./update.sh c0d239712d
#
# to see which git revision the portaudio code included with Pd is,
# see portaudio/src/common/pa_gitrevision.h
#
# Dan Wilcox danomatika.com 2018
#

# exit on error
set -e

##### VARIABLES

SRC=portaudio-git
DEST=portaudio

# commandline arg: version can be a tag, commit, etc
# uses git master by default
VERSION=""

##### FUNCTIONS

# copy .h & .c files from $SRC to $DEST, ignore missing file errors
copysrc() {
    mkdir -p "${DEST}/${1}"
    cp -v "${SRC}/${1}"/*.h "${DEST}/${1}" 2>/dev/null || :
    cp -v "${SRC}/${1}"/*.c "${DEST}/${1}" 2>/dev/null || :
    cp -v "${SRC}/${1}"/*.cpp "${DEST}/${1}" 2>/dev/null || :
}

usage() {
cat <<EOF 1>&2
Usage: $0 [OPTIONS] [VERSION]

Options:
   -h      display this help message

   -f      force (do not abort if '${DEST}/' exists)
           this updates existing files but keeps removed files,
           only use this if you know what you are doing!

Arguments:

VERSION    tag/commit/branch of portaudio to import

EOF
}

##### ARGUMENTS

force=no
OPTIND=1
while getopts ":hf" opt; do
    case "$opt" in
        h)
            usage
            exit 0
            ;;
        f)
            force=yes
            ;;
        '?')
            usage
            exit 1
            ;;
    esac
done
shift "$((OPTIND-1))" # Shift off the options and optional --

if [ $# -gt 0 ] ; then
    VERSION="$1"
fi

##### GO

# move to this scripts dir
scriptdir=$(dirname "$0")
cd "${scriptdir}"

# check if target exists
if [ -d "${DEST}" ]; then
    echo "Destination '${DEST}' exists" 1>&2
    if [ "${force}" = "yes" ]; then
        echo "  forced to update existing files" 1>&2
    else
        echo "  Please remove '$(pwd)/${DEST}' before running $0" 1>&2
        echo "  or check the '-h' flag" 1>&2
        exit 1
    fi
fi

# clone source
echo "==== Downloading portaudio $VERSION"
if [ -d "${SRC}" ] ; then
    rm -rf "${SRC}"
fi
git clone https://github.com/PortAudio/portaudio.git "${SRC}"
if [ "$VERSION" != "" ] ; then
    cd "${SRC}"
    git checkout "${VERSION}"
    cd -
fi

# set git revision
if [ -f "${SRC}"/update_gitrevision.sh ] ; then
    echo "==== Set git revision"
    cd "${SRC}" && ./update_gitrevision.sh && cd -
fi

echo "==== Copying"

# remove stuff we don't need
rm "${SRC}"/include/pa_jack.h
rm "${SRC}"/include/pa_win_ds.h
rm "${SRC}"/include/pa_win_wdmks.h
rm "${SRC}"/src/os/win/pa_win_wdmks_utils.*
rm "${SRC}"/src/os/win/pa_x86_plain_converters.*

# copy what we need, namely the main headers and relevant sources
copysrc include
copysrc src/common
copysrc src/hostapi/alsa
copysrc src/hostapi/asio
copysrc src/hostapi/wasapi
copysrc src/hostapi/wasapi/mingw-include
copysrc src/hostapi/coreaudio
copysrc src/hostapi/wmme
copysrc src/os/unix
copysrc src/os/win
cp -v "${SRC}"/LICENSE.txt "${DEST}"/

# cleanup
# rm -rf "${SRC}"