Add built local::lib

[catagits/Gitalist.git] / local-lib5 / man / man3 / Template::Plugins.3pm

.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.3
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sh \" Subsection heading
.br
.if t .Sp
.ne 5
.PP
\fB\\$1\fR
.PP
..
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  | will give a
.\" real vertical bar.  \*(C+ will give a nicer C++.  Capital omega is used to
.\" do unbreakable dashes and therefore won't be available.  \*(C` and \*(C'
.\" expand to `' in nroff, nothing in troff, for use with C<>.
.tr \(*W-|\(bv\*(Tr
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
'br\}
.\"
.\" If the F register is turned on, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.if \nF \{\
.    de IX
.    tm Index:\\$1\t\\n%\t"\\$2"
..
.    nr % 0
.    rr F
.\}
.\"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.hy 0
.if n .na
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "Template::Plugins 3"
.TH Template::Plugins 3 "2008-12-09" "perl v5.8.7" "User Contributed Perl Documentation"
.SH "NAME"
Template::Plugins \- Plugin provider module
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Template::Plugins;
.Ve
.PP
.Vb 1
\&    $plugin_provider = Template::Plugins\->new(\e%options);
.Ve
.PP
.Vb 1
\&    ($plugin, $error) = $plugin_provider\->fetch($name, @args);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \f(CW\*(C`Template::Plugins\*(C'\fR module defines a provider class which can be used
to load and instantiate Template Toolkit plugin modules.
.SH "METHODS"
.IX Header "METHODS"
.Sh "new(\e%params)"
.IX Subsection "new(%params)"
Constructor method which instantiates and returns a reference to a
\&\f(CW\*(C`Template::Plugins\*(C'\fR object.  A reference to a hash array of configuration
items may be passed as a parameter.  These are described below.  
.PP
Note that the Template front-end module creates a \f(CW\*(C`Template::Plugins\*(C'\fR
provider, passing all configuration items.  Thus, the examples shown
below in the form:
.PP
.Vb 5
\&    $plugprov = Template::Plugins\->new({
\&        PLUGIN_BASE => 'MyTemplate::Plugin',
\&        LOAD_PERL   => 1,
\&        ...
\&    });
.Ve
.PP
can also be used via the Template module as:
.PP
.Vb 5
\&    $ttengine = Template\->new({
\&        PLUGIN_BASE => 'MyTemplate::Plugin',
\&        LOAD_PERL   => 1,
\&        ...
\&    });
.Ve
.PP
as well as the more explicit form of:
.PP
.Vb 5
\&    $plugprov = Template::Plugins\->new({
\&        PLUGIN_BASE => 'MyTemplate::Plugin',
\&        LOAD_PERL   => 1,
\&        ...
\&    });
.Ve
.PP
.Vb 3
\&    $ttengine = Template\->new({
\&        LOAD_PLUGINS => [ $plugprov ],
\&    });
.Ve
.ie n .Sh "fetch($name, @args)"
.el .Sh "fetch($name, \f(CW@args\fP)"
.IX Subsection "fetch($name, @args)"
Called to request that a plugin of a given name be provided. The relevant
module is first loaded (if necessary) and the
\&\fIload()\fR class method called to return the factory
class name (usually the same package name) or a factory object (a prototype).
The \fInew()\fR method is then called as a class or object
method against the factory, passing all remaining parameters.
.PP
Returns a reference to a new plugin object or \f(CW\*(C`($error, STATUS_ERROR)\*(C'\fR
on error.  May also return \f(CW\*(C`(undef, STATUS_DECLINED)\*(C'\fR to decline to
serve the request.  If \f(CW\*(C`TOLERANT\*(C'\fR is set then all errors will be
returned as declines.
.SH "CONFIGURATION OPTIONS"
.IX Header "CONFIGURATION OPTIONS"
The following list summarises the configuration options that can be provided
to the \f(CW\*(C`Template::Plugins\*(C'\fR \fInew()\fR constructor.  Please consult 
Template::Manual::Config for further details and examples of each 
configuration option in use.
.Sh "\s-1PLUGINS\s0"
.IX Subsection "PLUGINS"
The \s-1PLUGINS\s0 option can be used to provide
a reference to a hash array that maps plugin names to Perl module names.
.PP
.Vb 7
\&    my $plugins = Template::Plugins\->new({
\&        PLUGINS => {
\&            cgi => 'MyOrg::Template::Plugin::CGI',
\&            foo => 'MyOrg::Template::Plugin::Foo',
\&            bar => 'MyOrg::Template::Plugin::Bar',
\&        },  
\&    });
.Ve
.Sh "\s-1PLUGIN_BASE\s0"
.IX Subsection "PLUGIN_BASE"
If a plugin is not defined in the \s-1PLUGINS\s0
hash then the \s-1PLUGIN_BASE\s0 is used to
attempt to construct a correct Perl module name which can be successfully
loaded.
.PP
.Vb 4
\&    # single value PLUGIN_BASE
\&    my $plugins = Template::Plugins\->new({
\&        PLUGIN_BASE => 'MyOrg::Template::Plugin',
\&    });
.Ve
.PP
.Vb 5
\&    # multiple value PLUGIN_BASE
\&    my $plugins = Template::Plugins\->new({
\&        PLUGIN_BASE => [   'MyOrg::Template::Plugin',
\&                           'YourOrg::Template::Plugin'  ],
\&    });
.Ve
.Sh "\s-1LOAD_PERL\s0"
.IX Subsection "LOAD_PERL"
The \s-1LOAD_PERL\s0 option can be set to allow
you to load regular Perl modules (i.e. those that don't reside in the
\&\f(CW\*(C`Template::Plugin\*(C'\fR or another user-defined namespace) as plugins.
.PP
If a plugin cannot be loaded using the
\&\s-1PLUGINS\s0 or
\&\s-1PLUGIN_BASE\s0 approaches then,
if the \s-1LOAD_PERL\s0 is set, the
provider will make a final attempt to load the module without prepending any
prefix to the module path. 
.PP
Unlike regular plugins, modules loaded using \s-1LOAD_PERL\s0
do not receive a Template::Context reference as the first argument to the 
\&\f(CW\*(C`new()\*(C'\fR constructor method.
.Sh "\s-1TOLERANT\s0"
.IX Subsection "TOLERANT"
The \s-1TOLERANT\s0 flag can be set to indicate
that the \f(CW\*(C`Template::Plugins\*(C'\fR module should ignore any errors encountered while
loading a plugin and instead return \f(CW\*(C`STATUS_DECLINED\*(C'\fR.
.Sh "\s-1DEBUG\s0"
.IX Subsection "DEBUG"
The \s-1DEBUG\s0 option can be used to enable
debugging messages for the \f(CW\*(C`Template::Plugins\*(C'\fR module by setting it to
include the \f(CW\*(C`DEBUG_PLUGINS\*(C'\fR value.
.PP
.Vb 1
\&    use Template::Constants qw( :debug );
.Ve
.PP
.Vb 3
\&    my $template = Template\->new({
\&        DEBUG => DEBUG_FILTERS | DEBUG_PLUGINS,
\&    });
.Ve
.SH "TEMPLATE TOOLKIT PLUGINS"
.IX Header "TEMPLATE TOOLKIT PLUGINS"
Please see Template::Manual::Plugins For a complete list of all the plugin 
modules distributed with the Template Toolkit.
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Wardley <abw@wardley.org> <http://wardley.org/>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 1996\-2007 Andy Wardley.  All Rights Reserved.
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Template::Manual::Plugins, Template::Plugin, Template::Context, Template.