#!/bin/bash

##################################################
# Mount dir                                      #
# - /var/lib/gitea                               #
# - /var/log/gitea                               #
##################################################

set -euo pipefail
export LANG=en_US.UTF-8
trap Quit EXIT

PIDS=
GOT_SIGTERM=

function Print {
    local file=/dev/null
    [ '-f' = "$1" ] && file=$2 && shift && shift
    date +"[%F %T] $*" | tee -a $file
}

function Quit {
    while :; do
        pkill -f gitea && Print killing gitea ... || break
        sleep 1
    done
    Print Container stopped.
    test -n "$GOT_SIGTERM"
}

function Usage {
    Print 'This container should run with
    **root user**
    **/var/{lib,log}/gitea mounted from host**
    '
}

function RestoreConf {
    if [ -z "$(ls gitea/)" ]; then
        Print Restore default config files and quit ...
        tar zxf gitea.tgz
        exit
    fi
}

function ChangeOwner {
    Print Change file owner ...
    chown -R gitea.www-data gitea/ /var/log/gitea/
}

function StartProc {
    Print Start gitea ...
    su - gitea -c '
        gitea web \
            --work-path /var/lib/gitea \
            --custom-path /var/lib/gitea/custom \
            --config /var/lib/gitea/custom/conf/app.ini
    ' &>> /var/log/gitea/gitea.out &
    PIDS="$PIDS $!"
}

function Main {
    local pid=
    cd /var/lib
    Usage
    RestoreConf
    ChangeOwner
    StartProc
    trap "GOT_SIGTERM=1; Print Got SIGTERM ..." SIGTERM
    while [ -z "$GOT_SIGTERM" ] && sleep 1; do
        for pid in $PIDS; do
            [ ! -e /proc/$pid ] && Print Unexpected error! && exit
        done
    done
}

# Start here
Main