#!/bin/sh

# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This script builds wheels for a single package when triggered from a push to
# a tag as part of a GitHub workflow (See .github/publish-a-package.yml). The
# wheel is then published to PyPI.

set -ev

if [ -z $GITHUB_REF ]; then
  echo 'Failed to run script, missing workflow env variable GITHUB_REF.'
  exit 1
fi

pkg_name_and_version=${GITHUB_REF#refs/tags/*}
pkg_name=${pkg_name_and_version%==*}
pkg_version=${pkg_name_and_version#opentelemetry-*==}

# Get the latest versions of packaging tools
python3 -m pip install --upgrade pip setuptools wheel packaging

# Validate version against PEP 440 conventions: https://packaging.pypa.io/en/latest/version.html
python3 -c "from packaging.version import Version; Version('${pkg_version}')"

basedir=$(git rev-parse --show-toplevel)
cd $basedir

distdir=${basedir}/dist
mkdir -p $distdir
rm -rf ${distdir:?}/*

pyproject_toml_file_path=$(ls **/$pkg_name/pyproject.toml)

if [ -z $pyproject_toml_file_path ]; then
  echo "Error! pyproject.toml not found for $pkg_name, can't build."
  exit 1
fi

directory_with_package=$(dirname $pyproject_toml_file_path)

cd $directory_with_package

python3 -m build --outdir ${distdir}

cd $distdir

pkg_tar_gz_file=${pkg_name}-${pkg_version}.tar.gz

if ! [ -f $pkg_tar_gz_file ]; then
  echo 'Error! Tag version does not match version built using latest package files.'
  exit 1
fi

# Build a wheel for the source distribution
pip wheel --no-deps $pkg_tar_gz_file