#!/bin/bash
#
# Maintenence operations at reboot.
# This script called usually by the cron.
#
# Author: Kovács Zoltán <kovacs.zoltan@smartfront.hu>
#         Kovács Zoltán <kovacsz@marcusconsulting.hu>
# License: GNU/GPL v3+ (https://www.gnu.org/licenses/gpl-3.0.en.html)
#
# 2025-02-02 v1.1
# new: On reboot (re)starts the per-service logger feature.
# 2023-06-18 v1.0
# new: forked from the "Smartfront's DOCKER_skeleton" repository.
# 2021-08-30 v0.1 Initial release

# Accepted environment variables and their defaults.
#
PAR_BASEDIR=${PAR_BASEDIR:-""}                  # Service's base folder
PAR_AGGLOGS=${PAR_AGGLOGS:-""}                  # Not empty for aggregated logs

# Other initialisations.
#
START_LOGGER="tools/startup.d/110-startlogs.sh"
YMLFILE="docker-compose.yml"

# Messages.
#
MSG_MISSINGDEP="Fatal: missing dependency"
MSG_MISSINGYML="Fatal: didn't find the docker-compose.yml file"

# Checks the dependencies.
#
TR=$(which tr 2>/dev/null)
if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
for item in basename cut dirname readlink
do
    if [ -n "$(which $item)" ]
    then export $(echo $item | "$TR" '[:lower:]' '[:upper:]')=$(which $item)
    else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
done
# All dependencies are available via "$THECOMMAND" (upper case) call.

# Where I'm?
# https://gist.github.com/TheMengzor/968e5ea87e99d9c41782
#
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do
    # resolve $SOURCE until the file is no longer a symlink
    SCRPATH="$( cd -P "$( "$DIRNAME" "$SOURCE" )" && pwd )" #"
    SOURCE="$("$READLINK" "$SOURCE")"
    # if $SOURCE was a relative symlink, we need to resolve it
    # relative to the path where the symlink file was located
    [[ $SOURCE != /* ]] && SOURCE="$SCRPATH/$SOURCE"
done; SCRPATH="$( cd -P "$( "$DIRNAME" "$SOURCE" )" && pwd )" #"
SCRFILE="$("$BASENAME" "$(test -L "$0" && "$READLINK" "$0" || echo "$0")")" #"

# Searches the base folder, containing a docker-compose.yml file.
#
# Called from the base folder (./)?
BASE_DIR="$PAR_BASEDIR"
TEST_DIR="$SCRPATH"
[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
# Called from ./tools?
TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
# Called from ./tools/*.d?
TEST_DIR="$("$DIRNAME" "$TEST_DIR")"
[[ -z "$BASE_DIR" ]] && [[ -r "$TEST_DIR/$YMLFILE" ]] && BASE_DIR="$TEST_DIR"
# On failure gives it up here.
if [ -z "$BASE_DIR" -o ! -r "$BASE_DIR/$YMLFILE" ]; then
    echo "$MSG_MISSINGYML" >&2; exit 1
fi

# Starts per-service logging if it is not already running.
#
if [ -x "$BASE_DIR/$START_LOGGER" ]; then
    "$BASE_DIR/$START_LOGGER"
fi

# That's all, Folks :)