/usr/share/perl5/Plack/Middleware/File/Sass.pm is in libplack-middleware-file-sass-perl 0.03-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | package Plack::Middleware::File::Sass;
use strict;
use 5.008_001;
our $VERSION = '0.03';
use parent qw(Plack::Middleware);
use Plack::Util::Accessor qw(sass syntax);
use Plack::Util;
use IPC::Open3 qw(open3);
use Carp ();
my $text_sass;
my %valid = (sass => 1, scss => 1);
sub prepare_app {
my $self = shift;
$self->syntax("sass") unless defined $self->syntax;
$valid{$self->syntax} or Carp::croak("Unsupported syntax: ", $self->syntax);
my $sass = `sass -v`;
if ($sass && $sass =~ /Sass 3/) {
$self->sass(\&sass_command);
} elsif (eval { require Text::Sass }) {
$self->sass(\&sass_perl);
} else {
Carp::croak("Can't find sass gem nor Text::Sass module");
}
}
sub sass_command {
my($syntax, $body) = @_;
my $pid = open3(my $in, my $out, my $err,
"sass", "--stdin", ($syntax eq 'scss' ? '--scss' : ()));
print $in $body;
close $in;
my $buf = join '', <$out>;
waitpid $pid, 0;
return $buf;
}
sub sass_perl {
my($syntax, $body) = @_;
my $method = "${syntax}2css";
$text_sass ||= Text::Sass->new;
$text_sass->$method($body);
}
sub call {
my($self, $env) = @_;
my $syntax = $self->syntax;
# Sort of depends on how App::File works
my $orig_path_info = $env->{PATH_INFO};
if ($env->{PATH_INFO} =~ s/\.css$/.$syntax/i) {
my $res = $self->app->($env);
return $res unless ref $res eq 'ARRAY';
if ($res->[0] == 200) {
my $sass; Plack::Util::foreach($res->[2], sub { $sass .= $_[0] });
my $css = $self->sass->($syntax, $sass);
my $h = Plack::Util::headers($res->[1]);
$h->set('Content-Type' => 'text/css');
$h->set('Content-Length' => length $css);
$res->[2] = [ $css ];
} elsif ($res->[0] == 404) {
$env->{PATH_INFO} = $orig_path_info;
$res = $self->app->($env);
}
return $res;
}
return $self->app->($env);
}
1;
__END__
=encoding utf-8
=for stopwords
=head1 NAME
Plack::Middleware::File::Sass - Sass and SCSS support for all Plack frameworks
=head1 SYNOPSIS
use Plack::App::File;
use Plack::Builder;
builder {
mount "/stylesheets" => builder {
enable "File::Sass";
Plack::App::File->new(root => "./stylesheets");
};
};
# Or with Middleware::Static
enable "File::Sass", syntax => "scss";
enable "Static", path => qr/\.css$/, root => "./static";
=head1 DESCRIPTION
Plack::Middleware::File::Sass is a Plack middleware component that
works with L<Plack::App::File> or L<Plack::Middleware::Static> to
compile L<Sass|http://sass-lang.com/> templates into CSS stylesheet in
every request.
When a request comes in for I<.css> file, this middleware changes the
internal path to I<.sass> or I<.scss>, depending on the configuration,
in the same directory. If the Sass template is found, a new CSS
stylesheet is built on memory and served to the browsers. Otherwise,
it falls back to the original I<.css> file in the directory.
This middleware should be very handy for the development. While Sass
to CSS rendering is reasonably fast, for the production environment
you might want to precompile Sass templates to CSS files on disk and
serves them with a real web server like nginx or lighttpd.
=head1 SASS BACKENDS
If you have the sass gem version higher than 3 installed and have the
C<sass> executable available in your PATH, this module automatically
uses the command to convert Sass or SCSS into CSS. If the command is
not available and you have L<Text::Sass> perl module available, it
will be used. Otherwise you'll get an exception during the
initialization of this middleware component.
=head1 OPTIONS
=over 4
=item syntax
Defines which syntax to use. Valid values are I<sass> and
I<scss>. Defaults to I<sass>.
=back
=head1 AUTHOR
Tatsuhiko Miyagawa E<lt>miyagawa@bulknews.netE<gt>
=head1 LICENSE
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=head1 SEE ALSO
L<Plack::App::File> L<Text::Sass> L<http://sass-lang.com/>
=cut
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