#!/bin/sh
export LC_ALL=C

do_clone()
{
    set -ex
    if ! test -e "$1" ; then
        git clone "$2" "$1"
    fi
    (
        cd "$1"
        git remote set-url origin "$2"
        git fetch
    )
}

do_clone_all()
{
    do_clone "ffmpeg"   "https://github.com/FFmpeg/FFmpeg.git"
    #do_clone "fribidi"  "http://anongit.freedesktop.org/git/fribidi/fribidi.git"
    do_clone "libass"   "https://github.com/libass/libass.git"
    do_clone "mpv"      "https://github.com/mpv-player/mpv.git"
}

do_gitmaster()
{
    set -ex
    (
        cd "$1"
        git checkout origin/master^0
        git remote prune origin
    )
}

versort_with_prefix()
{
	# Emulate sort -V using a known prefix. Filter out anything else.
	sed -n -e "s/^$1\([0-9]\)/\\1/p" |\
		sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 |\
		sed -e "s/^/$1/"
	# GNU version of the same:
	# grep "^$2[0-9]" | sort -V
}

do_releasetag()
{
    (
        cd "$1"
        version=`git tag | grep -v rc | grep -v dev | versort_with_prefix "$2" | tail -n 1`
        git checkout refs/tags/"$version"^0
    )
}

do_fixedref()
{
    (
        cd "$1"
        git checkout "$2"^0
    )
}

checkout_ffmpeg=do_gitmaster
#checkout_fribidi=do_releasetag
checkout_libass=do_gitmaster
checkout_mpv=do_gitmaster

checkout_all()
{
    set -ex
    do_clone_all
    $checkout_ffmpeg ffmpeg  'n'
    #$checkout_fribidi fribidi ''
    $checkout_libass libass
    $checkout_mpv mpv     'v'
}

do_bootstrap()
{
  scripts/mpv-bootstrap
}

do_update_debian_versions()
{
  scripts/debian-update-versions $1
}

if [ x"$1" != x"--skip-selfupdate" ]; then
    (
        set -ex
        git pull --rebase
    )
    exec "$0" --skip-selfupdate "$@"
fi
shift

select_branch()
{
    if [ -d config/ ] && [ -f config/"branch-$1" ]; then
        case `cat config/"branch-$1"` in
        master)
            echo do_gitmaster
            ;;
        *)
            # "release" is the defined value; but default anything else to it
            echo do_releasetag
            ;;
        esac
    else
        echo "$2"
    fi
}

checkout_ffmpeg=`select_branch ffmpeg $checkout_ffmpeg`
checkout_mpv=`select_branch mpv $checkout_mpv`

case "$1" in
    --master)
        checkout_ffmpeg=do_gitmaster
        #checkout_fribidi=do_gitmaster
        checkout_libass=do_gitmaster
        checkout_mpv=do_gitmaster
        ;;
    --release)
        checkout_ffmpeg=do_releasetag
        checkout_mpv=do_releasetag
        ;;
    '')
        ;;
    *)
        echo >&2 "$0 --master"
        echo >&2 "$0 --release"
        exit 0
        ;;
esac

checkout_all

do_update_debian_versions

do_bootstrap