NAME

       App::Cme::Command::meta - Work on the configuration model of an application

VERSION

       version 2.013

SYNOPSIS

         # edit meta model
         cme meta [ options ] edit [ model_class ]

         # check meta model
         cme meta [ options ] check [ model_class ]

         # model plugin mode
         cme meta [options] plugin application plugin_name

DESCRIPTION

       "cme meta edit" provides a Perl/Tk graphical interface to create or edit configuration
       models that will be used by Config::Model.

       This tool enables you to create configuration checker or editor for configuration files of
       an application.

USAGE

       "cme meta" supports several sub commands like "edit" or "plugin". These sub commands are
       detailed below.

   edit
       "cme meta edit" is the most useful sub command. It will read and write model file from
       "./lib/Config/Model/models" directory.

       Only configuration models matching the optional 4th parameter will be loaded. I.e.

         cme meta edit Xorg

       will load models "Xorg" (file "Xorg.pl") and all other "Xorg::*" like "Xorg::Screen" (file
       "Xorg/Screen.pl").

       Besides "edit", the following sub commands are available:

   check
       "cme meta check" reads the model files from "./lib/Config/Model/models" directory and
       checks their validity.

   plugin
       This sub command is used to create model plugins. A model plugin is an addendum to an
       existing model. The resulting file is saved in a ".d" directory besides the original file
       to be taken into account.

       For instance:

        $ cme meta plugin dpkg my-plugin
        # perform additions to Dpkg and Dpkg::Control and save
        $ find lib/Config/Model/models/Dpkg.d -type f
        lib/Config/Model/models/Debian/Dpkg.d/my-plugin/Dpkg.pl
        lib/Config/Model/models/Debian/Dpkg.d/my-plugin/Dpkg/Control.pl

       Use "-dev" option if you need to add plugins to a model located in current directory.

   gen-dot [ file.dot ]
       Create a dot file that represent the structure of the configuration model. By default, the
       generated dot file is "model.dot"

        $ cme meta gen-dot Itself itself.dot
        $ dot -T png itself.dot > itself.png

       "include" are represented by solid lines. Class usage (i.e. "config_class_name" parameter)
       is represented by dashed lines. The name of the element is attached to the dashed line.

   dump [ file.cds ]
       Dump configuration content in the specified file (or "model.cds") using Config::Model dump
       string syntax (hence the "cds" file extension).  See Config::Model::Loader for details on
       the syntax)

       By default, dump only custom values, i.e. different from application built-in values or
       model default values. See -dumptype option for other types of dump

        $ cme meta dump Itself

   dump-yaml [ file.yml ]
       Dump configuration content in the specified file (or "model.yml") in YAML format.

   save
       Force a save of the model even if no edition was done. This option is useful to migrate a
       model when Config::Model model feature changes.

Options

       -system
           Read model from system files, i.e. from installed files, not from "./lib" directory.

       -trace
           Provides a full stack trace when exiting on error.

       -load <cds_file_to_load> | -
           Load model from cds file (using Config::Model serialisation format, typically done
           with -dump option). This option can be used with "save" to directly save a model
           loaded from the cds file or from STDIN.

       -load-yaml <yaml_file_to_load> | -
           Load configuration data in model from YAML file. This option can be used with "save"
           to directly save a model loaded from a YAML file or from STDIN.

       -force-load
           Load file even if error are found in data. Bad data are loaded, but should be cleaned
           up before saving the model. See menu "File -> check" in the GUI.

       -dumptype [ full | preset | custom ]
           Choose to dump every values (full), only preset values or only customized values
           (default) (only for "dump" sub command)

       -open-item 'path'
           In graphical mode, force the UI to open the specified node. E.g.

            -open_item 'class:Fstab::FsLine element:fs_mntopts rules'

LOGGING

       All Config::Model logging was moved from klunky debug and verbose prints to Log::Log4perl.
       Logging can be configured in the following files:

       •

            ~/.log4config-model

       •

            /etc/log4config-model.conf

       Without these files, the following Log4perl config is used:

        log4perl.logger=WARN, Screen
        log4perl.appender.Screen        = Log::Log4perl::Appender::Screen
        log4perl.appender.Screen.stderr = 0
        log4perl.appender.Screen.layout = Log::Log4perl::Layout::PatternLayout
        log4perl.appender.Screen.layout.ConversionPattern = %d %m %n

       Log4Perl categories are shown in "LOGGING" in cme

Dogfooding

       The GUI shown by "cme meta edit" is created from a configuration model that describes the
       structure and parameters of a configuration model. (which explains the "Itself" name. This
       module could also be named "Config::Model::DogFooding").

       This explains why the GUI shown by "cme meta edit" looks like the GUI shown by "cme edit":
       the same GUI generator is used.

       If you're new to Config::Model, I'd advise not to peek under "Config::Model::Itself" hood
       lest you loose your sanity.

AUTHOR

       Dominique Dumont, ddumont at cpan dot org

SEE ALSO

       •   Config::Model::Manual::ModelCreationIntroduction

       •   cme,

       •   Config::Model,

       •   Config::Model::Itself,

       •   Config::Model::Node,

       •   Config::Model::Instance,

       •   Config::Model::HashId,

       •   Config::Model::ListId,

       •   Config::Model::WarpedNode,

       •   Config::Model::Value

AUTHOR

       Dominique Dumont

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2007-2017 by Dominique Dumont.

       This is free software, licensed under:

         The GNU Lesser General Public License, Version 2.1, February 1999