post_install.template

#!/usr/bin/env bash

# Copyright (c) YugaByte, 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.
#
# This script replaces patches files and links in Linuxbrew installation. It replaces path
# where Linuxbrew was originally built with new path of the same length. In order to keep the path
# length the same we are creating symlink of required length to current Linuxbrew dir.

set -euo pipefail

. "${0%/*}/linuxbrew-common.sh"

BREW_HOME="${0%/*}"
[[ -x $BREW_HOME/bin/brew ]] || \
  (echo "This script should be located inside Linuxbrew directory."; exit 1)

# {{ orig_brew_home }} is being replaced with original Linuxbrew home path.
ORIG_BREW_HOME="{{ orig_brew_home }}"
ORIG_LEN=${#ORIG_BREW_HOME}

BREW_HOME="$PWD"
LEN=${#BREW_HOME}
if [[ $LEN -gt $ORIG_LEN ]]; then
  echo "Linuxbrew absolute path should be no more than $ORIG_LEN bytes, but actual length is" \
       "$LEN bytes: $BREW_HOME" >&2
  exit 1
fi

BREW_LINK=$(get_fixed_length_path "$BREW_HOME" "$ORIG_LEN")
LINK_LEN=${#BREW_LINK}
if [[ $LINK_LEN != $ORIG_LEN ]]; then
  echo "Linuxbrew should be linked to a directory having absolute path length of $ORIG_LEN" \
       "bytes, but actual length is $LINK_LEN bytes: $BREW_LINK" >&2
  exit 1
fi

ln -sfT "$BREW_HOME" "$BREW_LINK"

ORIG_BREW_HOME_ESCAPED=$(get_escaped_sed_re "$ORIG_BREW_HOME")
BREW_LINK_ESCAPED=$(get_escaped_sed_replacement_str "$BREW_LINK")

cat FILES_TO_PATCH | while read f
do
  sed -i --binary "s/$ORIG_BREW_HOME_ESCAPED/$BREW_LINK_ESCAPED/g" "$f"
done

cat LINKS_TO_PATCH | while read f
do
  target="$(readlink "$f")"
  target="${target/$ORIG_BREW_HOME/$BREW_LINK}"
  ln -sfT "$target" "$f"
done