#! /bin/bash
#
# Trigger the package build in Fedora Copr from a GitHub Actions envioronment.
#
# The build in copr will build against existing PR, or against already pushed
# commit.
#
# This script can be HTTP downloaded, and work in isolation under Travis
# environment.  Note that this script is prepared to be easily copy-pasted to
# any GitHub Actions capable GitHub project and that the original script
# 'copr-gh-actions-submit' comes from the
# https://github.com/praiskup/copr-ci-tooling repository, so please submit
# patches/issues against that project (and keep your copy in sync).
#
# Copyright (C) 2021 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

die () { echo >&2 "$*" ; exit 1 ; }

# Please set COPR_PR_WEBHOOK (not encrypted) and COPR_PUSH_WEBHOOK (encrypted)
# variables in Travis CI.

PR_ID=$1

REF=HEAD
TYPE=PR
if test -n "$PR_ID"; then
    REF=refs/pull/$PR_ID
    git fetch origin "+pull/$PR_ID/head:$REF" --depth=1
    COPR_WEBHOOK=$COPR_PR_WEBHOOK
else
    COPR_WEBHOOK=$COPR_PUSH_WEBHOOK
    TYPE=PUSH
fi

test -z "$COPR_WEBHOOK" && die "webhook unset"


webhook_data()
{
    echo "{"
    echo "  \"type\": \"$TYPE\","
    test $TYPE = PR && \
    echo "  \"pr_id\": \"$PR_ID\","
    echo "  \"git_hash\": \"$(git rev-parse "$REF")\""
    echo "}"
    echo
}

echo "submitting JSON data:"
webhook_data
echo

# Copr accepts only json content, hack.
build_id=$(curl \
    --silent \
    -X POST \
    -H "Content-Type: application/json" \
    --data "$(webhook_data)" \
    "$COPR_WEBHOOK"
)

build_url="https://copr.fedorainfracloud.org/coprs/build/$build_id/"

echo "submitted build: $build_url"

set -o pipefail

sed_search_state='s/.*"state":[[:space:]]*"\([a-z]*\)".*/\1/'
url="https://copr.fedorainfracloud.org/api_3/build/$build_id/"
echo "checking $url for the build status"

while :; do
    sleep 30
    build_status=$(curl -sS --fail "$url" | sed "$sed_search_state")
    echo "build $build_url status: $build_status"

    case $build_status in
        *failed|*canceled) exit 1 ;;
        *succeeded)        exit 0 ;;
    esac
done