Provided by: libmojolicious-perl_4.63+dfsg-1_all 
NAME
Mojo::Template - Perl-ish templates!
SYNOPSIS
use Mojo::Template;
# Simple
my $mt = Mojo::Template->new;
my $output = $mt->render(<<'EOF');
% use Time::Piece;
<!DOCTYPE html>
<html>
<head><title>Simple</title></head>
% my $now = localtime;
<body>Time: <%= $now->hms %></body>
</html>
EOF
say $output;
# More advanced
my $output = $mt->render(<<'EOF', 23, 'foo bar');
% my ($num, $text) = @_;
%= 5 * 5
<!DOCTYPE html>
<html>
<head><title>More advanced</title></head>
<body>
test 123
foo <% my $i = $num + 2; %>
% for (1 .. 23) {
* some text <%= $i++ %>
% }
</body>
</html>
EOF
say $output;
DESCRIPTION
Mojo::Template is a minimalistic and very Perl-ish template engine, designed specifically
for all those small tasks that come up during big projects. Like preprocessing a
configuration file, generating text from heredocs and stuff like that.
See Mojolicious::Guides::Rendering for information on how to generate content with the
Mojolicious renderer.
SYNTAX
For all templates strict, warnings, utf8 and Perl 5.10 features are automatically enabled.
<% Perl code %>
<%= Perl expression, replaced with result %>
<%== Perl expression, replaced with XML escaped result %>
<%# Comment, useful for debugging %>
<%% Replaced with "<%", useful for generating templates %>
% Perl code line, treated as "<% line =%>"
%= Perl expression line, treated as "<%= line %>"
%== Perl expression line, treated as "<%== line %>"
%# Comment line, useful for debugging
%% Replaced with "%", useful for generating templates
Escaping behavior can be reversed with the "auto_escape" attribute, this is the default in
Mojolicious ".ep" templates for example.
<%= Perl expression, replaced with XML escaped result %>
<%== Perl expression, replaced with result %>
Mojo::ByteStream objects are always excluded from automatic escaping.
% use Mojo::ByteStream 'b';
<%= b('<div>excluded!</div>') %>
Newline characters can be escaped with a backslash.
This is <%= 1 + 1 %> a\
single line
And a backslash in front of a newline character can be escaped with another backslash.
This will <%= 1 + 1 %> result\\
in multiple\\
lines
Whitespace characters around tags can be trimmed with a special tag ending.
<%= All whitespace characters around this expression will be trimmed =%>
You can capture whole template blocks for reuse later with the "begin" and "end" keywords.
<% my $block = begin %>
<% my $name = shift; =%>
Hello <%= $name %>.
<% end %>
<%= $block->('Baerbel') %>
<%= $block->('Wolfgang') %>
Perl lines can also be indented freely.
% my $block = begin
% my $name = shift;
Hello <%= $name %>.
% end
%= $block->('Baerbel')
%= $block->('Wolfgang')
Mojo::Template templates get compiled to a Perl subroutine, that means you can access
arguments simply via @_.
% my ($foo, $bar) = @_;
% my $x = shift;
test 123 <%= $foo %>
The compilation of templates to Perl code can make debugging a bit tricky, but
Mojo::Template will return Mojo::Exception objects that stringify to error messages with
context.
Bareword "xx" not allowed while "strict subs" in use at template line 4.
2: </head>
3: <body>
4: % my $i = 2; xx
5: %= $i * 2
6: </body>
ATTRIBUTES
Mojo::Template implements the following attributes.
auto_escape
my $bool = $mt->auto_escape;
$mt = $mt->auto_escape($bool);
Activate automatic escaping.
append
my $code = $mt->append;
$mt = $mt->append('warn "Processed template"');
Append Perl code to compiled template. Note that this code should not contain newline
characters, or line numbers in error messages might end up being wrong.
capture_end
my $end = $mt->capture_end;
$mt = $mt->capture_end('end');
Keyword indicating the end of a capture block, defaults to "end".
<% my $block = begin %>
Some data!
<% end %>
capture_start
my $start = $mt->capture_start;
$mt = $mt->capture_start('begin');
Keyword indicating the start of a capture block, defaults to "begin".
<% my $block = begin %>
Some data!
<% end %>
code
my $code = $mt->code;
$mt = $mt->code($code);
Perl code for template.
comment_mark
my $mark = $mt->comment_mark;
$mt = $mt->comment_mark('#');
Character indicating the start of a comment, defaults to "#".
<%# This is a comment %>
compiled
my $compiled = $mt->compiled;
$mt = $mt->compiled($compiled);
Compiled template code.
encoding
my $encoding = $mt->encoding;
$mt = $mt->encoding('UTF-8');
Encoding used for template files.
escape
my $cb = $mt->escape;
$mt = $mt->escape(sub { reverse $_[0] });
A callback used to escape the results of escaped expressions, defaults to "xml_escape" in
Mojo::Util.
escape_mark
my $mark = $mt->escape_mark;
$mt = $mt->escape_mark('=');
Character indicating the start of an escaped expression, defaults to "=".
<%== $foo %>
expression_mark
my $mark = $mt->expression_mark;
$mt = $mt->expression_mark('=');
Character indicating the start of an expression, defaults to "=".
<%= $foo %>
line_start
my $start = $mt->line_start;
$mt = $mt->line_start('%');
Character indicating the start of a code line, defaults to "%".
% $foo = 23;
name
my $name = $mt->name;
$mt = $mt->name('foo.mt');
Name of template currently being processed, defaults to "template". Note that this value
should not contain quotes or newline characters, or error messages might end up being
wrong.
namespace
my $namespace = $mt->namespace;
$mt = $mt->namespace('main');
Namespace used to compile templates, defaults to "Mojo::Template::SandBox". Note that
namespaces should only be shared very carefully between templates, since functions and
global variables will not be cleared automatically.
prepend
my $code = $mt->prepend;
$mt = $mt->prepend('my $self = shift;');
Prepend Perl code to compiled template. Note that this code should not contain newline
characters, or line numbers in error messages might end up being wrong.
replace_mark
my $mark = $mt->replace_mark;
$mt = $mt->replace_mark('%');
Character used for escaping the start of a tag or line, defaults to "%".
<%% my $foo = 23; %>
tag_start
my $start = $mt->tag_start;
$mt = $mt->tag_start('<%');
Characters indicating the start of a tag, defaults to "<%".
<% $foo = 23; %>
tag_end
my $end = $mt->tag_end;
$mt = $mt->tag_end('%>');
Characters indicating the end of a tag, defaults to "%>".
<%= $foo %>
template
my $template = $mt->template;
$mt = $mt->template($template);
Raw unparsed template.
tree
my $tree = $mt->tree;
$mt = $mt->tree([['text', 'foo']]);
Template in parsed form. Note that this structure should only be used very carefully since
it is very dynamic.
trim_mark
my $mark = $mt->trim_mark;
$mt = $mt->trim_mark('-');
Character activating automatic whitespace trimming, defaults to "=".
<%= $foo =%>
METHODS
Mojo::Template inherits all methods from Mojo::Base and implements the following new ones.
build
$mt = $mt->build;
Build Perl "code" from "tree".
compile
my $exception = $mt->compile;
Compile Perl "code" for template.
interpret
my $output = $mt->interpret;
my $output = $mt->interpret(@args);
Interpret "compiled" template code.
# Reuse template
say $mt->render('Hello <%= $_[0] %>!', 'Bender');
say $mt->interpret('Fry');
say $mt->interpret('Leela');
parse
$mt = $mt->parse($template);
Parse template into "tree".
render
my $output = $mt->render($template);
my $output = $mt->render($template, @args);
Render template.
say $mt->render('Hello <%= $_[0] %>!', 'Bender');
render_file
my $output = $mt->render_file('/tmp/foo.mt');
my $output = $mt->render_file('/tmp/foo.mt', @args);
Render template file.
DEBUGGING
You can set the MOJO_TEMPLATE_DEBUG environment variable to get some advanced diagnostics
information printed to "STDERR".
MOJO_TEMPLATE_DEBUG=1
SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.