#!/bin/bash
# Copyright (c) 2019 Red Hat, Inc.
#
# 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 -ex
# NOTE(pabelanger): Allow users to force either microdnf or dnf as a package
# manager.
PKGMGR="${PKGMGR:-}"
PKGMGR_OPTS="${PKGMGR_OPTS:-}"
PKGMGR_PRESERVE_CACHE="${PKGMGR_PRESERVE_CACHE:-}"

PYCMD="${PYCMD:=/usr/bin/python3}"
PIPCMD="${PIPCMD:=$PYCMD -m pip}"
PIP_OPTS="${PIP_OPTS-}"

if [ -z $PKGMGR ]; then
    # Expect dnf to be installed, however if we find microdnf default to it.
    PKGMGR=/usr/bin/dnf
    if [ -f "/usr/bin/microdnf" ]; then
        PKGMGR=/usr/bin/microdnf
    fi
fi

if [ "$PKGMGR" = "/usr/bin/microdnf" ]
then
    if [ -z "${PKGMGR_OPTS}" ]; then
        # NOTE(pabelanger): skip install docs and weak dependencies to
        # make smaller images. Sadly, setting these in dnf.conf don't
        # appear to work.
        PKGMGR_OPTS="--nodocs --setopt install_weak_deps=0"
    fi
fi

if [ -f /output/bindep/run.txt ] ; then
    PACKAGES=$(cat /output/bindep/run.txt)
    if [ ! -z "$PACKAGES" ]; then
        $PKGMGR install -y $PKGMGR_OPTS $PACKAGES
    fi
fi

if [ -f /output/bindep/epel.txt ] ; then
    EPEL_PACKAGES=$(cat /output/bindep/epel.txt)
    if [ ! -z "$EPEL_PACKAGES" ]; then
        $PKGMGR install -y $PKGMGR_OPTS --enablerepo epel $EPEL_PACKAGES
    fi
fi

# If there's a constraints file, use it.
if [ -f /output/upper-constraints.txt ] ; then
    CONSTRAINTS="-c /output/upper-constraints.txt"
fi

# If a requirements.txt file exists,
# install it directly so that people can use git url syntax
# to do things like pick up patched but unreleased versions
# of dependencies.
if [ -f /output/requirements.txt ] ; then
    $PIPCMD install $CONSTRAINTS $PIP_OPTS --cache-dir=/output/wheels -r /output/requirements.txt
fi

# Add any requested extras to the list of things to install
EXTRAS=""
for extra in $* ; do
    EXTRAS="${EXTRAS} -r /output/$extra/requirements.txt"
done

if [ -f /output/packages.txt ] ; then
  # If a package list was passed to assemble, install that in the final
  # image.
  $PIPCMD install $CONSTRAINTS $PIP_OPTS --cache-dir=/output/wheels -r /output/packages.txt $EXTRAS
else
  # Install the wheels. Uninstall any existing version as siblings maybe
  # be built with the same version number as the latest release, but we
  # really want the speculatively built wheels installed over any
  # automatic dependencies.
  # NOTE(pabelanger): It is possible a project may not have a wheel, but does have requirements.txt
  if [ $(ls -1 /output/wheels/*whl 2>/dev/null | wc -l) -gt 0 ]; then
      $PIPCMD uninstall -y /output/wheels/*.whl
      $PIPCMD install $CONSTRAINTS $PIP_OPTS --cache-dir=/output/wheels /output/wheels/*.whl $EXTRAS
  elif [ ! -z "$EXTRAS" ] ; then
      $PIPCMD uninstall -y $EXTRAS
      $PIPCMD install $CONSTRAINTS $PIP_OPTS --cache-dir=/output/wheels $EXTRAS
  fi
fi

# clean up after ourselves, unless requested to keep the cache
if [[ "$PKGMGR_PRESERVE_CACHE" != always ]]; then
  $PKGMGR clean all
  rm -rf /var/cache/{dnf,yum}
fi

rm -rf /var/lib/dnf/history.*
rm -rf /var/log/{dnf.*,hawkey.log}