#!/bin/bash

# Copyright 2011 GRNET S.A. All rights reserved.
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#   1. Redistributions of source code must retain the above copyright
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#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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. @commondir@/common.sh

set -e
set -o pipefail

if [ "x$1" != "x--force" ]; then
    echo "WARNING: Exiting, this command would cause the system to halt." >&2
    echo "Use --force if you know what you're doing." >&2
    exit 1
fi

# terminate helper vm when the script exits
add_cleanup telinit 0

if [ ! -b "$FLOPPY_DEV" ]; then
    log_error "Floppy device is not present!"
fi

floppy=$(mktemp -d --tmpdir floppy.XXXXXX)
add_cleanup rmdir "$floppy"

mount $FLOPPY_DEV $floppy
add_cleanup umount "$floppy"

if [ -f "$floppy/rules" ]; then
    source "$floppy/rules"
else
    log_error "Floppy does not contain \`rules\' file"
fi

if [ -n "$SNF_IMAGE_PROPERTIES" ]; then
    properties=$(mktemp --tmpdir properties.XXXXXX)
    add_cleanup rm "$properties"
    echo "$SNF_IMAGE_PROPERTIES" |
        "@scriptsdir@/decode-properties.py" "$properties"
    source "$properties"
else
    log_error "SNF_IMAGE_PROPERTIES variable is missing"
fi

# Image mount point...
target=$(mktemp -d --tmpdir target.XXXXXX)
add_cleanup rmdir "$target"

export SNF_IMAGE_TARGET="$target"
export SNF_IMAGE_ROOTDEV="${SNF_IMAGE_DEV}${SNF_IMAGE_ROOT}"

if [ ! -d "@tasksdir@" ]; then
    log_error "snf-image/tasks directory is missing"
fi

RUN_PARTS=$(which run-parts)
if [ -z "$RUN_PARTS" ]; then
    log_error "run-parts program is missing from the system"
fi

# If something goes wrong with the tasks, try to umount the target filesystem
# in case it is left mounted...
trap '{ umount "$target"; }' ERR

if [ -z "$SNF_IMAGE_EXCLUDE_ALL_TASKS" ]; then
    # Redirect standard error to standard output,
    # prepend a timestamp before each line of output.
    echo "Execute all snf-image tasks...."
    $RUN_PARTS -v --exit-on-error "@tasksdir@" 2>&1|
        while IFS= read -r line; do
            echo $(date +%Y:%m:%d-%H:%M:%S.%N) "$line"
        done
fi

# Disable the trap. If code reaches here, the filesystem is unmounted.
trap - ERR

echo "SUCCESS" > "$RESULT"

cleanup
trap - EXIT

# never called...
exit 0

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :