#!/bin/sh

# Copyright © 2014-2016 Jakub Wilk <jwilk@jwilk.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

if [ $# -ge 2 ]
then
    printf '%s [commit]\n' "$0" >&2
    exit 1
fi
if ! [ -d .git ]
then
    printf '%s requires git checkout\n' "$0" >&2
    exit 1
fi
set -e
pwd="$PWD"
commit=${1:-HEAD}
commit=$(git describe "$commit")
name=$(git cat-file blob "$commit:doc/changelog" | head -n1 | cut -d ' ' -f 1)
date=$(git log -1 --pretty='format:%cI' "$commit" | head -c 10 | tr -d -)
version=$(git cat-file blob "$commit:doc/changelog" | head -n1 | cut -d ' ' -f2 | tr -d '()')
released=$(git cat-file blob "$commit:doc/changelog" | head -n1 | grep -v -w UNRELEASED || true)
[ -n "$released" ] || version="${version}rc${date}"
printf 'Commit: %s\nVersion: %s\n' "$commit" "$version" >&2
set -x
sourceroot=$(mktemp -d -t "$name-source-XXXXXX")
export TAR_OPTIONS='--owner root --group root --mode a+rX --format ustar'
export GZIP='-9 -n'
git archive "$commit" --prefix="$name-$version/" | tar -C "$sourceroot" -xf -
cd "$sourceroot"/*
find -name '__pycache__' | xargs rm -rf
rm .git*
rm .travis.yml
rm README.rst  # shipped as doc/README
rm private/build-source-tarball
make -C doc/
cd ..
tar -czf "$pwd/$name-$version.tar.gz" */
rm -r "$sourceroot"
set +x
cd "$pwd"
ls -d "$name-$version.tar.gz"

# vim:ts=4 sts=4 sw=4 et
