/ 
Getopt-CommandLineExports-0.01
River stage one • 3 direct dependents • 3 total dependents
/ Getopt::CommandLineExports

NAME

Getopt::CommandLineExports - Allow suroutines within a script to export comand line options with bash auto completion

VERSION

Version 0.01

SYNOPSIS

Example Code:

use strict;
use warnings;
use Getopt::CommandLineExports qw(&regAC &parseArgsByPosition &parseArgs
    &checkArgs $scriptName @exportedSubs %cmdLines);

$scriptName = qq[TestCommandLineExports]; %cmdLines = ( twoScalars => [qw/ ONE=s TWO=s /], oneHash => [qw/ ONE=s% /], oneList => [qw/ ONE=s@ /], ); sub twoScalars { my %h = ( ONE => undef, TWO => undef, ( parseArgs \@_, @{$cmdLines{twoScalars}}), ); print "twoScalars missing required argument:\n" . join( "\n", checkArgs \%h ) . "\n" if ( checkArgs \%h ); return " $h{ONE} , $h{TWO} \n"; }

sub oneHash { my %h = ( ONE => undef, ( parseArgs \@_, @{$cmdLines{oneHash}}), ); print "oneHash missing required argument:\n" . join( "\n", checkArgs \%h ) . "\n" if ( checkArgs \%h ); print "oneHash\n"; print join("\n", (%{$h{ONE}})); }

sub oneList { my %h = ( ONE => undef, ( parseArgs \@_, @{$cmdLines{oneList}}), ); print "oneList missing required argument:\n" . join( "\n", checkArgs \%h ) . "\n" if ( checkArgs \%h ); print "oneList\n"; print join("\n",@{$h{ONE}}); }

# The "Main" subroutine. Not included in package, must be added manually to a script

if ( defined $ARGV[0] ) { if ( defined( &{ $ARGV[0] } ) ) { no strict 'refs'; my $subRef = shift @ARGV; print join( "\n", &$subRef(@ARGV) ) . "\n" unless $subRef =~ /regAC/ ; &$subRef($scriptName, \@exportedSubs, \%cmdLines) if $subRef =~ /regAC/ ; exit 0; } }

# some unit test examples: twoScalars "Hello1", "Hello2"; twoScalars {ONE => "Hello1", TWO => "Hello2"}; twoScalars "--ONE Hello1 --TWO Hello2"; twoScalars "--ONE", "Hello1", "--TWO", "Hello2"; twoScalars "--ONE", "Hello1", "--TWO", "Hello2", "--THREE", "Hello3"; # complains about "unknown option: three"

PURPOSE

This module is intended to provide the capability to have a single script export many subcommands in a consistant manner.

In the example above, the script is named "TestCommandLineExports". On a bash style command line, the following commands would work:

TestCommandLineExports twoScalars --ONE "Arg1" --TWO "Arg2"

and would print: Arg1, Arg2

TestCommandLineExports twoScalars --TWO "Arg2" twoScalars missing required argument: --ONE

TestCommandLineExports twoScalars may also be called through a CGI interface as well.

The principle use of this was to provide an easy, consistant, method to provide unit test ability for scripts. It also allows for a single script to export multiple subcommands and, with the included bash auto completion function, allows for the subcommands and options to integrate nicely with the bash shell.

EXPORT

A list of functions that can be exported. You can delete this section if you don't export anything, such as for a purely object-oriented module.

SUBROUTINES/METHODS

regAC

Print a bash auto completion script. Returns a script roughly sutiable for the bash_autocompletion functions:

Include roughly the following in your script:

# this hash uses perl's Getopt::Long format my %cmdLines = ( regAC => [qw//], SubCommandOne => [qw/DIRECTORY=s YES_OR_NO=s ANY_FILE=s/], SubCommandTwo => {qw/INT=i/], ) my @exportedSubs = keys %cmdLines;

#you can use bash completion words here ("__directory__") to complete with directories # The default is filename completion my %additionalWordCompletions = ( SubCommandOne => { DIRECTORY => [qw/__directory__/], YES_OR_NO => [qw/yes no/], }, );

if ( defined $ARGV[0] ) { if ( defined( &{ $ARGV[0] } ) ) { no strict 'refs'; my $subRef = shift @ARGV; print join( "\n", &$subRef(@ARGV) ) . "\n" unless $subRef =~ /regAC/ ; &$subRef($scriptName, \@exportedSubs, \%cmdLines, \%additionalWordCompletions) if $subRef =~ /regAC/ ; exit 0; } }

Run from the commandline as:

ScriptName regAC > /etc/bash_completion.d/ScriptName source /etc/bash_completion.d/ScriptName

or

sudo ScriptName regAC source /etc/bash_completion.d/ScriptName

and the script should be registered with all the commands in:

@Getopt::CommandLineExports::exportedSubs

and the command lines from:

%Getopt::CommandLineExports::cmdLines

parseArgs

parse and argument list according to a command line spec in the Getopt::Long format. Returns a hash of arguments and values.

%cmdLines = ( function => [qw/ REQUIRED_ARGUMENT=s OPTIONAL_ARGUMENT_ONE=s OPTIONAL_ARGUMENT_TWO=s /], );

my %h = (
    REQUIRED_ARGUMENT     => undef, # undef means the argument is required
    OPTIONAL_ARGUMENT_TWO => 'default value',  # a default value is provided
    # no mention of OPTIONAL_ARGUMENT_ONE means that it could be provided or could be undefined
    # checkArgs below will NOT include this in the missing argument list
    (   parseArgs \@_, @{$cmdLines{function}})
);

parseArgsByPosition

parse an argument list according to a command line spec in the Getopt::Long format.

parseArgsByPosition( \@argv, \%args, @ComSpec);

The first argument is the standard argv list. The second is a reference to a hash to receive the arguments parsed from argv (a reference is passed to allow for default values to be set. The last argument is a reference to the argument spec in Getopt::Long format

as an example:

my %args = (ARG1 => "Default Value", ARG2 => undef);

parseArgsByPosition( ["One", "Two", "Three"], \%args, qw/ARG1=s ARG2=s ARG3=s ARG4=s/);

should set %args to be (ARG1 => "One", ARG2 => "Two", ARG3 => "Three")

checkArgs

checkArgs will return a list of arguments that are undefined. This can be used to identify required arguments with:

my %h = (
    REQUIRED_ARGUMENT     => undef,
    (   parseArgs \@_, @{$cmdLines{function}})
);
print "function missing required argument:\n"
    . join( "\n", checkArgs \%h ) . "\n"
    if ( checkArgs \%h );

AUTHOR

Robert Haxton, <robert.haxton at gmail.com>

BUGS

Please report any bugs or feature requests to bug-getopt-commandlineexports at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Getopt-CommandLineExports. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc Getopt::CommandLineExports

You can also look for information at:

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

Copyright 2011 Robert Haxton.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.