# read your app from app.psgi file

         # choose .psgi file from ARGV[0] (or with -a option)
         plackup hello.psgi

         # switch server implementation with --server (or -s)
         plackup --server HTTP::Server::Simple --port 9090 --host test.psgi

         # use UNIX socket to run FCGI daemon
         plackup -s FCGI --listen /tmp/fcgi.sock myapp.psgi

         # launch FCGI external server on port 9090
         plackup -s FCGI --port 9090

       plackup is a command line utility to run PSGI applications 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 Plack::Loader for the authoritative

       "plackup" assumes you have an "app.psgi" script in your current
       directory.  The last statement of "app.psgi" should be a code reference
       that is a PSGI application:

         use MyApp;
         my $application = MyApp->new;
         my $app = sub { $application->run_psgi(@_) };

             plackup --host --port 9090 /path/to/app.psgi

           The first non-option argument is used as a ".psgi" file path. You
           can also set this path with "-a" or "--app". If omitted, the
           default file path is "app.psgi" in the current directory.

       -a, --app
           Specifies the full path to a ".psgi" script. You may alternately
           provide this path as the first argument to "plackup".

       -e  Evaluates the given perl code as a PSGI app, much like perl's "-e"

             plackup -e 'sub { my $env = shift; return [ ... ] }'

           It is also handy when you want to run a custom application like

             use Plack::Builder;
             use Plack::Util;

             builder {
                 enable "Auth::Basic", authenticator => ...;

           Note that when you use "-e" option to enable middleware, plackup
           doesn't assume the implicit "app.psgi" path. You must either pass
           the path to your ".psgi" file in the command line arguments or load
           the application inside "-e" after the "enable".

             plackup                                # Runs app.psgi
             plackup -e 'enable "Foo"'              # Doesn't work!
             plackup -e 'enable "Foo"' app.psgi     # Works
             plackup -e 'enable "Foo"; sub { ... }' # Works

       -o, --host
           Binds to a TCP interface. Defaults to undef, which lets most server
           backends bind to the any (*) interface. This option is only valid
           for servers which support TCP sockets.

       -p, --port
           Binds to a TCP port. Defaults to 5000. This option is only valid
           for servers which support TCP sockets.

       -s, --server, the "PLACK_SERVER" environment variable
           Selects a specific server implementation to run on. When provided,
           the "-s" or "--server" flag will be preferred over the environment

           If no option is given, plackup will try to detect the best server
           implementation based on the environment variables as well as
           modules loaded by your application in %INC. See Plack::Loader for

       -S, --socket
           Listens on a UNIX domain socket path. Defaults to undef. This
           option is only valid for servers which support UNIX sockets.

       -l, --listen
           Listens on one or more addresses, whether "HOST:PORT", ":PORT", or
           "PATH" (without colons). You may use this option multiple times to
           listen on multiple addresses, but the server will decide whether it
           supports multiple interfaces.

       -D, --daemonize
           Makes the process run in the background. It's up to the backend
           server/handler implementation whether this option is respected or

       -I  Specifies Perl library include paths, like "perl"'s -I option. You
             plackup -E deployment
             env PLACK_ENV=deployment plackup

           Common values are "development", "deployment", and "test". The
           default value is "development", which causes "plackup" to load the
           middleware components: AccessLog, StackTrace, and Lint unless
           "--no-default-middleware" is set.

           This prevents loading the default middleware stack even when Plack
           environment (i.e. "-E" or "PLACK_ENV") is set to "development".

       -r, --reload
           Makes plackup restart the server whenever a file in your
           development directory changes. This option by default watches the
           "lib" directory and the base directory where .psgi file is located.
           Use "-R" to watch other directories.

           Reloading will delay the compilation of your application. Automatic
           server detection (see "-s" above) may not behave as you expect, if
           plackup needs to scan your application for the modules it uses.
           Avoid problems by specifying "-s" explicitly when using "-r" or

       -R, --Reload
           Makes plackup restart the server whenever a file in any of the
           given directories changes. "-R" and "--Reload" take a comma-
           separated list of paths:

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

       -L, --loader
           Specifies the server loading subclass that implements how to run
           the server.  Available options are Plack::Loader (default),
           Restarter (automatically set when "-r" or "-R" is used), Delayed,
           and Shotgun.

           See Plack::Loader::Delayed and Plack::Loader::Shotgun for more

           Specifies the pathname of a file where the access log should be
           written.  By default, in the development environment access logs
           will go to STDERR.

           Specify the root path of your app ("SCRIPT_NAME" in PSGI env) to
           run. The following two commands are roughly the same.

             plackup --path /foo app.psgi
             plackup -e 'mount "/foo" => Plack::Util::load_psgi("app.psgi")'

       Other options that starts with "--" are passed through to the backend
       server.  See each Plack::Handler backend's documentation for more
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