#! /usr/bin/env bash
#
# Makes release tarballs for the repository in the current directory;
# and if --recursive is given, also for all submodules.

DEST="$(pwd)/build/dist" # Where to put the TGZs.
LOGS="$DEST/.log"        # Where to put build logs.

dists=""

function usage() {
    echo "Usage: $(basename $0) [--recursive]"
}

function release() {
    mod=$1
    tmp="$LOGS/make-release.$(basename $mod).log"

    cat </dev/null >$tmp

    echo "--- Building distribution for $mod" >&2
    echo "Log in $tmp." >&2

    make dist >$tmp 2>&1

    cat $tmp | awk '/CPack:.*generated/ {print $4} /^Package: / {print $2}' | while read tgz; do
        if echo $tgz | grep -qv ^/; then
            tgz="$(pwd)/$tgz"
        fi

        version=$(git tag --contains HEAD | grep -E '^(release|beta)$')

        if [ "$version" == "" ]; then
            version="git"
        fi

        echo "Distribution in $tgz ($version)" >&2
        ls -al $tgz | awk '{print "    ", $0; }' >&2

        echo "$tgz#$version"
    done
}

if [ "$1" == "--recursive" ]; then
    submodules=1
    shift
fi

if [ "$submodules" == "1" ]; then
    mods=$(git submodule foreach -q --recursive pwd | grep -v /cmake)
fi

if [ -e $DEST ]; then
    echo
    echo "$DEST exists already, proceeding will delete it."
    echo ">> Continue? (y/n)"
    read line
    if [ "$line" != "y" ]; then
        exit 1
    fi
fi

rm -rf $DEST
install -d $DEST
install -d $LOGS

mods="$mods ."

build=

for mod in $mods; do
    cwd=$(pwd)
    cd $mod

    if [ "$mod" = "." ]; then
        mod=$(pwd)
        mod=$(basename $mod)
    fi

    if [ ! '(' -e CMakeLists.txt -o -e Makefile ')' ]; then
        echo "No CMakeLists.txt or Makefile in $mod, skipping."
        cd $cwd
        continue
    fi

    ignore=1

    if [ "$(git describe HEAD)" = "$(git describe release 2>/dev/null)" ]; then
        ignore=0
    fi

    if [ "$(git describe HEAD)" = "$(git describe beta 2>/dev/null)" ]; then
        ignore=0
    fi

    if [ "$ignore" = "1" ]; then
        echo "Module $mod is not tagged for release or beta, skipping."
        cd $cwd
        continue
    fi

    dist=$(release $mod)
    (echo $dist | grep -qv "^ *$") || echo "No distribution found for $mod."

    dists="$dists $dist"
    echo

    cd $cwd
done

for dist in $dists; do
    tgz=$(echo $dist | cut -d '#' -f 1)
    version=$(echo $dist | cut -d '#' -f 2)
    dst=$(basename $tgz)
    dst="$DEST/$version/$(echo $dst | sed 's/\.tgz/.tar.gz/g')"

    install -d $DEST/$version
    mv $tgz $dst

    echo Signing $dst ...
    sign-file $dst

done

echo "--- All distributions in $DEST:"

all=$(find $DEST -path '*gz*')
test "$all" != "" && ls -rl $all || echo "None."
echo