plackup

#!/usr/bin/perl
use strict;
use lib "lib";
use Cwd;
use Getopt::Long;
use Plack::Loader;
use Plack::Util;
use Pod::Usage;
use Try::Tiny;

my $app    = "app.psgi";
my $host;
my $port   = 5000;
my $env    = "development";
my $help   = 0;
my $backend;
my $reload;
my @includes;

# delay the build process for reloader
sub build(&;$) {
    my $block = shift;
    my $app   = shift || sub { };
    return sub { $block->($app->()) };
}

# From 'prove': Allow cuddling the paths with the -I
@ARGV = map { /^(-I)(.+)/ ? ($1,$2) : $_ } @ARGV;

Getopt::Long::Configure("no_ignore_case", "pass_through");
GetOptions(
    "a|app=s"      => \$app,
    "o|host=s"     => \$host,
    "p|port=i"     => \$port,
    "s|server=s"   => \$backend,
    "i|impl=s"     => sub { warn "-i is deprecated. Use -s instead\n"; $backend = $_[1] },
    "E|env=s"      => \$env,
    'I=s@'         => \@includes,
    'r|reload:s'   => sub { $reload = [ split ",", $_[1] || '.' ] },
    "h|help",      => \$help,
);

pod2usage(0) if $help;
lib->import(@includes) if @includes;

my $handler = build { Plack::Util::load_psgi $app };

if ($env eq 'development') {
    require Plack::Middleware::StackTrace;
    require Plack::Middleware::AccessLog;
    $handler = build { Plack::Middleware::StackTrace->wrap($_[0]) } $handler;
    $handler = build { Plack::Middleware::AccessLog->wrap($_[0], logger => sub { print STDERR @_ }) } $handler;
}

my @args = map {
    my $is_long_opt = s/^--//;
    my @v = split '=', $_, 2;
    $v[0] =~ tr/-/_/ if $is_long_opt;
    @v;
} @ARGV;

push @args, host => $host, port => $port;

my $loader = $reload ?
    do { require Plack::Loader::Reloadable; Plack::Loader::Reloadable->new($reload) } : 'Plack::Loader';

my $server = $backend ? $loader->load($backend, @args) : $loader->auto(@args);
$server->run($reload ? $handler : $handler->());

__END__

=head1 NAME

plackup - Run PSGI application with Plack servers

=head1 SYNOPSIS

  # read your app from app.psgi file
  plackup

  # can be passed with --app option (Or -a)
  plackup --app hello.psgi

  # Switch server implementation with --server (or -s)
  plackup --server Coro --port 9090

=head1 DESCRIPTION

plackup is a command line utility to run PSGI application from the command line.

plackup automatically figures out the environment it is run in, and
runs your application in that environment. FastCGI, CGI, AnyEvent and
others can all be detected. See L<Plack::Loader> for the authorative
list.

C<plackup> assumes you have an C<app.psgi> script in your current
directory, that would look like:

  #!/usr/bin/perl
  use MyApp;
  my $app = MyApp->new;
  my $handler = sub { $app->run_psgi(@_) };

The last statement of C<app.psgi> should be a code reference that is a
PSGI application.

=head1 OPTIONS

=over 4

=item -a, --app

Use the C<--app> option to locate a C<.psgi> script with a different
name in a different path. (Actually the path doesn't need to end in
C<.psgi>: it's just there for convention)

=item -o, --host

The interface a TCP based server daemon binds to. Defauts to undef,
which lets most server backends bind the the any (*) interface. This
opeion doesn't mean anything if the server is not TCP based.

=item -p, --port

The port number a TCP based server daemon listens on. Defaults to
5000. This option doesn't mean anything if the server is not TCP
based.

=item -s, --server

Select a specific implementation to run on using the C<PLACK_SERVER>
environment variable or use the C<-s> or C<--server> flag which will
be prefered over the environment variable if present.

=item -I

Specify perl library include path, like C<perl>'s -I option.

=item -E, --env

Specify the environment option (default is C<development>). If it's
set to C<development>, following middleware is enabled by default:
L<CommonLogger>, L<StackTrace>.

=item -r, --reload

Make plackup to watch updates from your development directory and
restarts the server whenever a file is updated. You can specify the
path to watch file updates separated by comma (C<,>) and it default to
the current directory.

  plackup -r /path/to/project/lib,/path/to/project/templates

=back

Other options are passed through to the backend server. See each
Plack::Server backend documentations to see which options are
available.

=head1 SEE ALSO

L<Plack::Loader>

=cut