#!/usr/bin/env bash
VERSION='v2.3.8'

warn()  { echo "$@" >&2;        }
die()   { warn "$@"; exit 1;    }

contents="$(find . -mindepth 1 -maxdepth 1 \! -name .release \! -name .backup \! -name '.lock*')"
test -z "$contents" || perl -MNarada -E 'Narada::detect(@ARGV)' narada || exit 1

[ $# -ne 0 ] || die "Usage: narada-restore path/to/backup.full.tar [files]"

[ $# -eq 1 -a -n "$contents" -a -z "$NARADA_SKIP_LOCK" ] && exec narada-lock-exclusive $0 "$@"

backup="$1"
shift

# Make sure every file name to extract (if any) begins with ./
files=("$@")
files=("${files[@]#/}")
files=("${files[@]#./}")
files=("${files[@]/#/./}")

# If backup contains .backup/ or .lock* then this is 100% error in
# config/backup/exclude and may result in damaging project when unpacked
# (unlike similar error with including tmp/* into backup),
# so let's protect against this just in case.
# If backup contains .release/ (which is usually redundant but not an
# error) then it should be unpacked only if there is no .release/ yet,
# otherwise it also may damage project when unpacked.
excl=()
test -d '.release' && excl+=( --exclude './.release' )
excl+=( --exclude './.backup' )
excl+=( --exclude './.lock*' )

# Order of commands to run before/after unpacking archive is CRITICAL!
# - qmail should be --lock, not --clean, to avoid losing emails while
#   restoring from backup
# - services should be shut down after cron to avoid starting them from
#   cron right after shutdown

if test -z "$files" -a -n "$contents"; then
	narada-setup-qmail --lock
	narada-setup-cron  --clean
	narada-shutdown-services
	narada-bg-killall
	narada-setup-mysql --clean
fi

TAR=`which gtar tar 2>/dev/null | head -n 1`
LANG= $TAR -x -p -f "$backup" -g /dev/null --anchored "${excl[@]}" "${files[@]}"
code=$?

if test -z "$files"; then
	if test $code -ne 0; then
		(
		echo
		echo 'Run these commands after fixing above errors:'
		test -f var/use/mysql           && echo 'narada-setup-mysql'
		test -f var/use/services        && echo 'narada-start-services &'
		test -f var/use/cron            && echo 'narada-setup-cron'
		test ! -f var/use/qmail         && echo 'narada-setup-qmail --clean'
		test -f var/use/qmail           && echo 'narada-setup-qmail'
		) >&2
	else
		test -f var/use/mysql           && narada-setup-mysql
		test -f var/use/services        && narada-start-services &
		test -f var/use/cron            && narada-setup-cron
		test ! -f var/use/qmail         && narada-setup-qmail --clean
		test -f var/use/qmail           && narada-setup-qmail
	fi
fi

exit $code


: <<'=cut'

=encoding utf8

=head1 NAME

narada-restore - restore full project or some files from backup


=head1 VERSION

This document describes narada-restore version v2.3.8


=head1 USAGE

    narada-restore path/to/backup.full.tar [files]


=head1 DESCRIPTION

Should be executed in project deploy directory.

Will restore full project or just extract given files from backup created
using C<narada-backup>.

When restoring full project in directory with existing project will run
under L<narada-lock-exclusive>.

When restoring full project will also update project's external setup (for
ex. if project use MySQL then C<narada-setup-mysql --clean> will be run
before unpacking backup and C<narada-setup-mysql> will be run after).

When given, file names must be the full path from project deploy directory,
without wildcards. Values C<a/b>, C</a/b> and C<./a/b> are all handled in
same way (as C<./a/b>).


=head1 CONFIGURATION AND ENVIRONMENT

	var/use/*


=head1 SUPPORT

=head2 Bugs / Feature Requests

Please report any bugs or feature requests through the issue tracker
at L<https://github.com/powerman/Narada/issues>.
You will be notified automatically of any progress on your issue.

=head2 Source Code

This is open source software. The code repository is available for
public review and contribution under the terms of the license.
Feel free to fork the repository and submit pull requests.

L<https://github.com/powerman/Narada>

    git clone https://github.com/powerman/Narada.git

=head2 Resources

=over

=item * MetaCPAN Search

L<https://metacpan.org/search?q=Narada>

=item * CPAN Ratings

L<http://cpanratings.perl.org/dist/Narada>

=item * AnnoCPAN: Annotated CPAN documentation

L<http://annocpan.org/dist/Narada>

=item * CPAN Testers Matrix

L<http://matrix.cpantesters.org/?dist=Narada>

=item * CPANTS: A CPAN Testing Service (Kwalitee)

L<http://cpants.cpanauthors.org/dist/Narada>

=back


=head1 AUTHOR

Alex Efros E<lt>powerman@cpan.orgE<gt>


=head1 COPYRIGHT AND LICENSE

This software is Copyright (c) 2008- by Alex Efros E<lt>powerman@cpan.orgE<gt>.

This is free software, licensed under:

  The MIT (X11) License


=cut