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How To View POD Embedded in a Perl Script?

by ParsonGeorge (Initiate)
on Apr 04, 2014 at 01:00 UTC ( #1081048=perlquestion: print w/ replies, xml ) Need Help??
ParsonGeorge has asked for the wisdom of the Perl Monks concerning the following question:

I'm new to Perl and am trying to figure out how to use POD.

First, some important "stuff": OS: Windows 7 on my desktop and Ubuntu 1204 on my laptop (I use both somewhat interchangeably). Perl: Strawberry 5.18 on Windows, 5.14 on Linux. IDE: Padre and Eclipse/Epic (both loaded on each platform, and I alternate between them).

I've created just a tiny POD sample:

#!/usr/bin/perl print "Hello, World!\n"; =head1 NAME My::Module - An example module =cut

When I run the program, "Hello, World!" prints properly; the POD stuff is ignored (as I expect). However, how can I view the documentation?

I've tried running perldoc in a terminal with the name of the script as an argument: perldoc hello.pl -- but that doesn't seem to work.

I created a separate .POD file with some documentation and this did work: perldoc hello.pod. However, is there some way to view the documentation that's embedded in a script? Ideally, I'd like to embed the POD documentation at the bottom of a script and then click something or enter something to view that documentation from within either IDE.

Thanks, in advance, for any help you can offer.

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Re: How To View POD Embedded in a Perl Script?
by LanX (Canon) on Apr 04, 2014 at 01:09 UTC
    POD requires (per specification) empty lines around the delimiters. Some parsers don't care but it's usually better.

    #!/usr/bin/perl print "Hello, World!\n"; =head1 NAME My::Module - An example module =cut

    please note the newline after cut.

    Using perldoc is ok

    update

    concerning IDEs: emacs in cperl-mode has the cperl-pod-to-manpage command, also available via menu as Perl / Perl docs / View manpage of POD in this file

    Cheers Rolf

    ( addicted to the Perl Programming Language)

      Thanks for your help. For what it's worth, I actually did RTFM and knew that there was supposed to be a blank line following cut. I had a CR at the end of the cut line so the cursor jumped to a new line for input and I stupidly thought that was a blank line. It was not. I entered a CR on the line following cut in order to get a true blank line and the pod documentation is now working fine.

      I also found out that in Padre on Windows I could enter "perldoc pod.pl" as a Run -> Run Command (or Ctrl+F5) and the documentation displayed just fine. I'm still working making this work with Eclipse (I think that I have to define a new External Tool) and on my Linux box (I have to install the perl-doc package).

      However, I'm over that first hurdle. Thanks, again, for your help.

        IMHO running commands and piping STDOUT into a pane is a generic feature of every editor (or at least IDE).

        I'd be surprised if Padre or EPIC (i.e. Eclipse) do not already provide preset hotkeys. (maybe try F-keys in combination with Ctrl or Alt)

        Cheers Rolf

        ( addicted to the Perl Programming Language)

Re: How To View POD Embedded in a Perl Script?
by Anonymous Monk on Apr 04, 2014 at 01:47 UTC

      The problem was my improper coding of the pod block. I failed to put a blank line at the end. Thanks for your help.

Re: How To View POD Embedded in a Perl Script?
by Laurent_R (Parson) on Apr 04, 2014 at 06:16 UTC
Re: How To View POD Embedded in a Perl Script?
by Discipulus (Curate) on Apr 04, 2014 at 09:48 UTC
    When you are on win you can also benefit of Jenda's useful macro:
    pdoc=perldoc -o html -T -w index $* > %TEMP%\perldoc_temp.html && star +t %TEMP%\perldoc_temp.html
    HtH*
    There are no rules, there are no thumbs..
    Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

      Thanks for the tip, and the link. I'll play around with this doskey macro to see if I like the HTML display better than the default perldocs display.

Re: How To View POD Embedded in a Perl Script?
by ParsonGeorge (Initiate) on Apr 04, 2014 at 13:42 UTC

    Woa! I just now stumbled upon a great Padre feature. I clicked Help->Current Document and the pod documentation popped up in a new window (worked on both Windows and Ubuntu). Just wanted to add this note in case anyone else is struggling with displaying pod for your program.

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