#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2021, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# 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.                                             #
#--------------------------------------------------------------------------- #

set -e -o pipefail

if [ "$1" == '--help' ]; then
    cat - >&2 <<EOF
Usage: $(basename "$0") [distro1 [distro2 ...]]

SYNOPSIS
  Regenerates Gemfile.locks for each distribution/version, distribution
  identificator corresponds to the directory name. When started without
  any parameter, refreshes all targets. To limit functionality only
  on specific targets, pass the distribution identificators as arguments
  on the command line.

  IMPORTANT: Requires working Docker or Podman (with podman-docker wrapper)!

EXAMPLES
  $(basename "$0")                       - updates all distributions
  $(basename "$0") CentOS8 Ubuntu2004    - updates only specified ones
EOF

    exit 1
fi

if ! docker image ls &>/dev/null; then
    echo 'ERROR: Requires working Docker (Podman)' >&2
    exit 1
fi

# Whole current repository will be passed into build
GIT_DIR=$(readlink -f "$(dirname "$0")/../../")
cd "${GIT_DIR}/share/install_gems/"

# Specify targets as argument or take all
DIRS=$*
DIRS=${DIRS:-$(ls -d */)}

for DIR in $DIRS; do
    TARGET=${DIR%%/}
    TARGET=${TARGET,,}

    # guess container image and tag
    DOCKER_IMAGE=${TARGET%%[0-9]*}
    DOCKER_TAG=${TARGET##${DOCKER_IMAGE}}

    case "${DOCKER_IMAGE}" in
        ubuntu)
            DOCKER_TAG=$(echo "${DOCKER_TAG}" | sed -e 's/^\([0-9][0-9]\)/\1./')
            ;;
    esac

    echo "--- Platform ${TARGET} (${DOCKER_IMAGE}:${DOCKER_TAG})"

    cat - <<EOF | docker run --rm -it -v "${GIT_DIR}:/git:z" "${DOCKER_IMAGE}:${DOCKER_TAG}" bash -c "eval $(cat -)"
set -xe -o pipefail

export LC_ALL=C

# install/remove essential packages
if command -v dpkg >/dev/null; then
    apt-get update -qq
    apt-get install -y ruby >/dev/null
    dpkg -r ruby-bundler

elif command -v rpm >/dev/null; then
    if command -v dnf >/dev/null; then
        dnf -q -y install 'dnf-command(config-manager)'
        dnf config-manager --set-enabled powertools || /bin/true
    fi

    yum -q -y install rubygems findutils
    yum -q -y remove  rubygem-bundler
fi

# install Bundler 1.x
find /usr -name 'bundler*.gemspec' -delete
export PATH=\$PATH:/usr/local/bin
gem install bundler -v '<2' --no-document --quiet

# install OpenNebula
mkdir -p /run/lock
cd /git
if ! ./install.sh &>/tmp/install.out; then
    cat /tmp/install.out
    exit 1
fi

# install gems, check version in lock and copy back
/usr/share/one/install_gems

VERSION=\$(tail -1 /usr/share/one/Gemfile.lock | sed -e 's/\s*//')
if ! [[ "\$VERSION" =~ ^1\. ]]; then
    echo "ERROR: Generated with wrong Bundler version \$VERSION" >&2
    exit 1
fi

mkdir -p /git/share/install_gems/${DIR}/
\\cp -f /usr/share/one/Gemfile.lock /git/share/install_gems/${DIR}/
exit 0
EOF

    echo
done