#!/usr/bin/perl
#
# evil(1) - edit given files in evil-local-mode
#
# Copyright (c) 2013 Akinori MUSHA
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# See https://github.com/knu/emacsc for the latest information.

use strict;
use warnings;
use Cwd qw(abs_path getcwd);
use File::Basename;
use Getopt::Long;

main();

sub usage {
    my $name = basename($0);

    print STDERR <<"EOF";
usage: $name [-s NAME] FILE..

    -h, --help      show this help
    -s, --socket-name=NAME
                    specify the file name of the socket file name for
                    communication

Edit given files in evil-local-mode.

This command depends on emacsc(1).  Put the following lines in your
Emacs initialization file.

    (require 'emacsc)
EOF
}

sub main {
    my $opt_s;
    GetOptions("h|help" => sub { usage; exit },
               "s|socket-name=s" => \$opt_s) or exit 64;

    if (1 < @ARGV) {
        usage;
        exit 64;
    }

    my @emacsc = qw(emacsc);

    if ($opt_s) {
        push @emacsc, '-s', $opt_s;
    }

    eval {
        if (@ARGV) {
            system @emacsc, '-e', <<'EOS';
(progn
  (autoload 'evil-local-mode "evil" "evil-local-mode" t)

  (defadvice server-visit-files
    (around evil-mode activate)
    (if (null files)
        ad-do-it
      (unwind-protect
          (progn
            (add-hook 'server-visit-hook 'evil-local-mode)
            ad-do-it)
        (remove-hook 'server-visit-hook 'evil-local-mode)
        (ad-remove-advice 'server-visit-files 'around 'evil-mode)
        (ad-activate 'server-visit-files)))))
EOS
            system @emacsc, @ARGV;
        } else {
            print STDERR basename($0), ": no file is given";
            exit 1;
        }
    };
    if ($@) {
        print STDERR basename($0), ": ", $@;
        exit 1;
    }
}
