1App::CLI(3)           User Contributed Perl Documentation          App::CLI(3)
2
3
4

NAME

6       App::CLI - Dispatcher module for command line interface programs
7

SYNOPSIS

9           package MyApp;
10           use base 'App::CLI';        # the DISPATCHER of your App
11                                       # it's not necessary to put the dispatcher
12                                       # on the top level of your App
13
14           package main;
15
16           MyApp->dispatch;            # call the dispatcher where you want
17
18
19           package MyApp::List;
20           use base qw(App::CLI::Command); # any (SUB)COMMAND of your App
21
22           use constant options => (
23               "h|help"   => "help",
24               "verbose"  => "verbose",
25               'n|name=s'  => 'name',
26           );
27
28           use constant subcommands => qw(User Nickname type); # if you want subcommands
29                                                               # automatically dispatch to subcommands
30                                                               # when invoke $ myapp list [user|nickname|--type]
31                                                               # note 'type' is not capitalized
32                                                               # it is a deprecated subcommand
33
34           sub run {
35               my ($self, @args) = @_;
36
37               print "verbose" if $self->{verbose};
38               my $name = $self->{name}; # get arg following long option --name
39
40               if ($self->{help}) {
41                   # if $ myapp list --help or $ myapp list -h
42                   # only output PODs
43               } else {
44                   # do something when invoking $ myapp list
45                   # without subcommand and --help
46               }
47           }
48
49
50           package MyApp::List::User;
51           use base qw(App::CLI::Command);
52           use constant options => (
53               "h|help"  =>  "help",
54           );
55
56           sub run {
57               my ($self,@args) = @_;
58               # code for listing user
59           }
60
61
62           pakcage MyApp::List::Nickname;
63           use base qw(App::CLI::Command);
64           use constant options => (
65               "sort=s"  =>  "sort",
66           );
67
68           sub run {
69               my ($self,@args) = @_;
70               # code for listing nickname
71           }
72
73
74           package MyApp::List::type;   # old genre of subcommand could not cascade infinitely
75           use base qw(MyApp::List);    # should inherit its parent's command
76
77           sub run {
78               my ($self, @args);
79               # run to here when invoking $ myapp list --type
80           }
81
82
83           package MyApp::Help;
84           use base 'App::CLI::Command::Help';
85
86           use constant options => (
87               'verbose' => 'verbose',
88           );
89
90           sub run {
91               my ($self, @arg) = @_;
92               # do something
93               $self->SUPER(@_); # App::CLI::Command::Help would output POD of each command
94           }
95

DESCRIPTION

97       "App::CLI" dispatches CLI (command line interface) based commands into
98       command classes.  It also supports subcommand and per-command options.
99
100   Methods
101       get_opt([@config], %opt_map)
102
103       Give options map, processed by Getopt::Long::Parser.
104
105       dispatch(@args)
106
107       Interface of dispatcher
108
109       cmd_map($cmd)
110
111       Find the name of the package implementing the requested command.
112
113       The command is first searched for in "alias". If the alias exists and
114       points to a package name starting with the "+" sign, then that package
115       name (minus the "+" sign) is returned. This makes it possible to map
116       commands to arbitrary packages.
117
118       Otherwise, the package is searched for in the result of calling
119       "commands", and a package name is constructed by upper-casing the first
120       character of the command name, and appending it to the package name of
121       the app itself.
122
123       If both of these fail, and the command does not map to any package
124       name, "undef" is returned instead.
125
126       get_cmd($cmd, @arg)
127
128       Return subcommand of first level via $ARGV[0].
129

SEE ALSO

131       •   App::CLI::Command
132
133       •   Getopt::Long
134

AUTHORS

136       •   Chia-liang Kao <clkao@clkao.org>
137
138       •   Alex Vandiver  <alexmv@bestpractical.com>
139
140       •   Yo-An Lin      <cornelius.howl@gmail.com>
141
142       •   Shelling       <navyblueshellingford@gmail.com>
143
144       •   Paul Cochrane  <paul@liekut.de> (current maintainer)
145

CONTRIBUTORS

147       The following people have contributed patches to the project:
148
149       •   José Joaquín Atria <jjatria@gmail.com>
150
151       •   sunnavy            <sunnavy@gmail.com>
152
153       •   Ildar Shaimordanov <ildar.shaimordanov@gmail.com>
154

156       Copyright 2005-2010 by Chia-liang Kao <clkao@clkao.org>.  Copyright
157       2010 by Yo-An Lin <cornelius.howl@gmail.com> and Shelling
158       <navyblueshellingford@gmail.com>.  Copyright 2017-2018 by Paul Cochrane
159       <paul@liekut.de>
160
161       This program is free software; you can redistribute it and/or modify it
162       under the same terms as Perl itself.
163
164       See <http://www.perl.com/perl/misc/Artistic.html>
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168perl v5.34.0                      2021-07-22                       App::CLI(3)
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