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# Copyright (C) 2008-2010, Sebastian Riedel.
package Mojo::Home;
use strict;
use warnings;
use base 'Mojo::Base';
use overload '""' => sub { shift->to_string }, fallback => 1;
use File::Spec;
use FindBin;
use Mojo::Command;
use Mojo::Loader;
__PACKAGE__->attr(app_class => 'Mojo::HelloWorld');
# I'm normally not a praying man, but if you're up there,
# please save me Superman.
sub detect {
my ($self, $class) = @_;
# Class
$self->app_class($class) if $class;
$class ||= $self->app_class;
# Environment variable
if ($ENV{MOJO_HOME}) {
my @parts = File::Spec->splitdir($ENV{MOJO_HOME});
$self->{_parts} = \@parts;
return $self;
}
# Try to find home from lib directory
if ($class) {
# Load
my $file = Mojo::Command->class_to_path($class);
unless ($INC{$file}) {
if (my $e = Mojo::Loader->load($class)) { die $e if ref $e }
}
# Detect
if (my $path = $INC{$file}) {
$path =~ s/$file$//;
my @home = File::Spec->splitdir($path);
# Remove "lib" and "blib"
while (@home) {
last unless $home[-1] =~ /^b?lib$/ || $home[-1] eq '';
pop @home;
}
$self->{_parts} = \@home;
}
}
# FindBin fallback
$self->{_parts} = [split /\//, $FindBin::Bin] unless $self->{_parts};
return $self;
}
sub lib_dir {
my $self = shift;
# Directory found
my $parts = $self->{_parts} || [];
my $path = File::Spec->catdir(@$parts, 'lib');
return $path if -d $path;
# No lib directory
return;
}
sub parse {
my ($self, $path) = @_;
my @parts = File::Spec->splitdir($path);
$self->{_parts} = \@parts;
return $self;
}
sub rel_dir {
my $self = shift;
my $parts = $self->{_parts} || [];
return File::Spec->catdir(@$parts, split '/', shift);
}
sub rel_file {
my $self = shift;
my $parts = $self->{_parts} || [];
return File::Spec->catfile(@$parts, split '/', shift);
}
sub to_string {
my $self = shift;
my $parts = $self->{_parts} || [];
return File::Spec->catdir(@$parts);
}
1;
__END__
=head1 NAME
Mojo::Home - Detect And Access The Project Root Directory In Mojo
=head1 SYNOPSIS
use Mojo::Home;
my $home = Mojo::Home->new;
$home->detect;
=head1 DESCRIPTION
L<Mojo::Home> is a container for home directories.
=head1 ATTRIBUTES
L<Mojo::Home> implements the following attributes.
=head2 C<app_class>
my $class = $home->app_class;
$home = $home->app_class('Foo::Bar');
Application class.
=head1 METHODS
L<Mojo::Home> inherits all methods from L<Mojo::Base> and implements the
following new ones.
=head2 C<detect>
$home = $home->detect;
$home = $home->detect('My::App');
Detect home directory from application class.
=head2 C<lib_dir>
my $path = $home->lib_dir;
Path to C<lib> directory.
=head2 C<parse>
$home = $home->parse('/foo/bar');
Parse path.
=head2 C<rel_dir>
my $path = $home->rel_dir('foo/bar');
Generate absolute path for relative directory.
=head2 C<rel_file>
my $path = $home->rel_file('foo/bar.html');
Generate absolute path for relative file.
=head2 C<to_string>
my $string = $home->to_string;
my $string = "$home";
Home directory.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicious.org>.
=cut
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