#!/bin/bash

formats=( "bz2" "xz" )
declare -A tar_opt=( ["bz2"]=j ["xz"]=J )
digests=( md5 sha1 sha512 )
use_gpg=yes

do_trace()
{
    echo "  --> $@" >&2
}

do_abort()
{
    echo "ERROR: $@" >&2
    exit 1
}

# Go to the top-level
topdir=`git rev-parse --show-toplevel`
if [ -z "${topdir}" ]; then
    do_abort "Not in the Git clone"
fi
cd "${topdir}"

# Determine the version. Replace the dashes with dots, as packaging
# systems don't expect dashes in versions, but they're ok in package
# name.
version=`git describe | sed -r -e 's,-,.,g' -e 's,^crosstool\.ng\.,crosstool-ng-,'`
do_trace "Creating release for ${version}"

# Create the base working directory
if [ -e "release" -a ! -d "release" ]; then
    do_abort "File 'release' already exists but is not a directory"
fi
mkdir -p "release"

# Copy the base stuff
do_trace "Copying crosstool-NG"
rm -rf "release/${version}"
git archive --prefix="${version}/" HEAD | tar xf - -C "release"

# The rest of modifications are inside the release directory
cd "release/${version}"

# Run bootstrap before it is removed
do_trace "Bootstrapping"
./bootstrap
rm -f bootstrap

# Remove other things not for the end user
do_trace "Removing unreleased files"
rm -f .travis.*
find -name .gitignore | xargs rm
rm -rf autom4te.cache maintainer

# Go back to top level
cd ../..

# Package up
do_trace "Packaging"
for fmt in "${formats[@]}"; do
    tar c${tar_opt[$fmt]}f "release/${version}.tar.${fmt}" -C "release" "${version}"
    for h in "${digests[@]}"; do
        (cd "release" && ${h}sum "${version}.tar.${fmt}") > "release/${version}.tar.${fmt}.${h}"
    done
    if [ "${use_gpg}" = "yes" ]; then
        (cd "release" && gpg --detach-sign "${version}.tar.${fmt}")
    fi
done