bin/archive-dir

#!/usr/bin/env perl

use 5.014;
use warnings;
use strict;

use lib glob('~/.lib/perl5');
use Autofetch;

use Time::Piece;
use Path::Tiny;
use Getopt::Long::Descriptive;

sub main {
  my ($opt, $usage) = describe_options(
    'archive-dir %o <directory> ...',
    ['dest|d=s'     => 'destination path' => {default => '.'}],
    ['fileinto|F=s' => 'file into, a strftime format', {default => '%Y'}],
    ['age|a=i'      => "minimum age in days for archival", {default => 60}],
    ['files|f'      => "operate on plain files only"],
    [],
    ['yes|Y'  => "actually move stuff"],
    ['help|h' => "print usage message and exit", {shortcircuit => 1}],
    {show_defaults => 1}
  );
  print($usage->text), exit if $opt->help || !@ARGV;

  archive_dir($opt, $_) for @ARGV;
}

sub archive_dir {
  my $opt     = shift;
  my $dir     = path(shift);
  my $destdir = path($opt->dest);
     $destdir = $dir->child($destdir) if $destdir->is_relative;
  my $destfmt = $opt->fileinto;
  my $nowish  = time;
  my $age     = $opt->age * 24 * 60 * 60;

  my @work;

  for my $child ($dir->children) {
    next if $child->is_dir && (
      $opt->files || $child eq $destdir || $child =~ /^(?:\d{4}|\d\d)$/
    );
    next if $opt->files && $child->basename =~ /^\./;

    my $mtime = $child->stat->mtime;
    next unless ($nowish - $mtime) >= $age;

    my $dest = $destdir->child(localtime($mtime)->strftime($destfmt));
    push @work, [$dest, $child];
  }

  my $lastdest = '';
  for my $work (sort {$a->[0] cmp $b->[0]} @work) {
    my ($dest, $child) = @$work;

    say $lastdest = $dest
      if $dest ne $lastdest;

    say "\t$child";

    next unless $opt->yes;
    $dest->mkpath;
    $child->move($dest . '/' . $child->relative($dir));
  }
}

main();