---
layout:  project
title:   Pod::To::Pager
date:    2018-07-15T00:00:00Z
langs:   Perl 6
license: AGPLv3
repo:    https://gitlab.com/tyil/perl6-pod-to-pager
---
:toc: preamble

`Pod::To::Pager` is a Perl 6 project to generate prettier output from Perl 6
Pod structures. By default, Perl 6 ships with a very simple Pod formatter,
which can be used by calling `perl6 --doc <file>`. You can specify a doc
formatter by giving it as argument, like `perl6 --doc=Text <file>`. This will
use the `Pod::To::Text` module to format the output, which is also the default.

But, I wanted something prettier, something I would actually like reading if I
were looking for documentation on a module. Most people are familiar with UNIX
man pages (or at least, most people who will read, this I hope). So I wanted to
create something similar. To get used to Perl 6 Pod, I just tried making simple
text, with some coloring, as this is easier than also trying to learn how man
pages are to be created.

And so, `Pod::To::Pager` was born. I've received some feedback from the Perl 6
community, and included some of it in to the module. It comes with a `p6man`
utility, which is very much like `p6doc`. It calls the formatter, and calls a
pager to show the result. It looks very much like the UNIX man pages, and the
pager lets you read it like one. It's basically an on-the-fly generated man
page.

== Installation

To install the module, be sure to have Perl 6 and `zef`, the Perl 6 module
manager, installed on your system. You can then call `zef install` to have it
download, test, and install the module:

[source,sh]
----
zef install Pod::To::Pager
----

== Usage

Once installed, you can use the module in many ways. You can call it as a Pod
formatter on Perl 6 itself:

[source,sh]
----
perl6 --doc=Pager lib/Some/Module.pm6
----

This will render the document on `STDOUT`, and display it in your terminal. If
it doesn't support scrollback, there's a high chance you can't see the top part
of it. To solve that, you can use a pager, like `less`:

[source,sh]
----
perl6 --doc=Pager lib/Some/Module.pm6 | less
----

This will keep it possible to scroll through the output, until you press `q` to
quit the pager.

=== p6man

Since the last form is the way it was intended to be used (hence the *pager* in
`Pod::To::Pager`), there's a utility bundled with the module to make such use
easier. Inspired by the existence of `p6doc`, it's called `p6man`. It will use
`less` as the pager on GNU+Linux if possible, otherwise it will fall back to
`more`. On Windows, it will just use `more`. You can call it with either a
(relative) file path, or a module name:

[source,sh]
----
p6man lib/Some/Module.pm6
p6man App::Assixt
----

For the latter variant to work, the module must be installed locally.

=== In Perl 6 programs

You can also use it directly in Perl 6 programs. This allows you to change
behaviour of the formatting process, or render the program's own documentation
with this formatter's output. To do that, `use` the module, and call the
`format` method on the formatter class:

[source,perl6]
----
use Pod::To::Pager;

say Pod::To::Pager($=pod);
----

This will render the program's own Pod structure, formatted using
`Pod::To::Pager`, and print it to `STDOUT`.

== Feedback

If you have any feedback, please reach out to me on `#perl6` on IRC, or create
an issue on the repository.