#!/usr/bin/env bash
#
# Run poudriere at system boot. Useful for virtual machines so launching the VM also kicks off a build.
set -euo pipefail
IFS=$'\n\t'
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

: ${LOCKFILE:="/var/run/poudboot.lock"}
: ${INFO_DIR:="/opt/poudriere/run_info"}
: ${PORT_UPDATE_SECONDS:="86400"}
: ${BUILD_SECONDS:="7200"}
: ${LOG_RETENTION_DAYS:="30"}

############## Setup #########################

# function cleanup {
#     for f in "${folders[@]}"; do
#         log "Deleting $f"
#         rm -rf "$f"
#     done
# }
# folders=()
# for sig in EXIT INT QUIT HUP TERM; do
#   trap "set +e; cleanup" "$sig"
# done

function die {
    local status_code="$1"
    shift
    (>&2 echo "${@}")
    exit "$status_code"
}

function log {
    (>&2 echo "${@}")
}

function run_locked {
    if [ "${RUN_LOCKED:-}" != "RUN" ]; then
        exec env RUN_LOCKED=RUN flock --nonblock $LOCKFILE $0 $@
    fi

}

############## Program #########################

function main {
    local COMMAND="$1"

    if [ "$COMMAND" = "start" ]; then
        run_locked "${@}"
        shift 1
        cmd_start "${@}"
    elif [ "$COMMAND" = "stop" ]; then
        shift 1
        cmd_stop "${@}"
    else
        die 1 "Unrecognized command: $COMMAND"
    fi
}

function abort_if_jobs_running {
    if [[ $(sudo poudriere status) != *"No running builds"* ]]; then
        echo "There is already a poudriere build in progress, exiting."
        exit 0
    fi
}

function build {
    poudriere pkgclean -y "$@"
    poudriere bulk -J "${POUDRIERE_JOBS:-1}" "$@"
}

function cmd_start {
    abort_if_jobs_running

    while true; do
        for conf in /opt/poudriere/build_configs/*; do
            (
                # Allow command failures without quitting the script because some
                # package sets might fail whereas others may succeed based on which
                # packages are in each set.
                set +e

                source "$conf"
                local RUN_DIR="$INFO_DIR/$JAIL-$PORTS-$SET"
                local TIMES_FILE="$RUN_DIR/times"
                mkdir -p "$RUN_DIR"
                local PORTUPDATE=0
                local LASTBUILD=0
                if [ -e "$TIMES_FILE" ]; then
                    source "$TIMES_FILE"
                fi
                local now=$(date +%s)
                if [ $((now - PORTUPDATE)) -gt "$PORT_UPDATE_SECONDS" ]; then
                    log "Updating ports for $JAIL-$PORTS-$SET"
                    portshaker -U
                    portshaker -M
                    PORTUPDATE=$(date +%s)
                    # Cleanup old unused dist files
                    poudriere distclean -y -p "$PORTS" -f /usr/local/etc/poudriere.d/$JAIL-$PORTS-$SET-pkglist
                    poudriere logclean -y "$LOG_RETENTION_DAYS"
                fi
                if [ $((now - LASTBUILD)) -gt "$BUILD_SECONDS" ]; then
                    log "Building ports for $JAIL-$PORTS-$SET"
                    build -j "$JAIL" -p "$PORTS" -z "$SET" -f /usr/local/etc/poudriere.d/$JAIL-$PORTS-$SET-pkglist
                    LASTBUILD=$(date +%s)
                fi

                cat > "$TIMES_FILE" <<EOF
PORTUPDATE=$PORTUPDATE
LASTBUILD=$LASTBUILD
EOF
            )
        done
        sleep 300
    done
}

function cmd_stop {
    echo "cmd_stop not implemented."
}

main "${@}"