Kevin Ryde > Perl-Critic-Pulp-88 > Perl::Critic::Pulp

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NAME ^

Perl::Critic::Pulp - some add-on perlcritic policies

DESCRIPTION ^

This is a collection of add-on policies for Perl::Critic. They're under a "pulp" theme plus other themes according to their purpose (see "POLICY THEMES" in Perl::Critic).

Bugs

CodeLayout::ProhibitFatCommaNewline

Avoid newline before => not quoting.

CodeLayout::ProhibitIfIfSameLine

Avoid } if () { perhaps meant to be elsif.

Miscellanea::TextDomainPlaceholders

Check keyword arguments to __x(), __nx(), etc.

Modules::ProhibitUseQuotedVersion

Don't quote a version requirement like use Foo '1.5'

ValuesAndExpressions::RequireNumericVersion

$VERSION plain number for comparisons and checking.

ValuesAndExpressions::ConstantBeforeLt

Avoid problems with FOO < 123

ValuesAndExpressions::NotWithCompare

Avoid problems with ! $x == $y

ValuesAndExpressions::ProhibitArrayAssignAref

Dubious @array=[1,2,3] array/arrayref assignments.

ValuesAndExpressions::ProhibitDuplicateHashKeys

Duplicate literal keys %h = (xyz=>123, xyz=>456).

ValuesAndExpressions::ProhibitFiletest_f

Don't use -f.

ValuesAndExpressions::UnexpandedSpecialLiteral

__PACKAGE__ etc special words not expanding.

Compatibility

Compatibility::ConstantPragmaHash

Version requirement for hash style multi-constants.

Compatibility::ConstantLeadingUnderscore

Version requirement for constants with leading underscore.

Compatibility::Gtk2Constants

Gtk2 module version requirement for some constants.

Compatibility::PerlMinimumVersionAndWhy

Perl version declared against features used.

Compatibility::PodMinimumVersion

Perl version declared against POD features used.

Compatibility::ProhibitUnixDevNull

Prefer File::Spec->devnull over /dev/null.

Efficiency

Documentation::RequireEndBeforeLastPod

Put __END__ before POD at end of file.

Miscellanea::TextDomainUnused

Locale::TextDomain imported but not used.

Modules::ProhibitPOSIXimport

Don't import the whole of POSIX.

Cosmetic

CodeLayout::RequireTrailingCommaAtNewline

Comma "," at the end of list, if at a newline.

CodeLayout::RequireFinalSemicolon

Semicolon ; on the last statement of a subroutine or block.

ValuesAndExpressions::ProhibitEmptyCommas

Stray consecutive commas ,,

ValuesAndExpressions::ProhibitNullStatements

Stray semicolons ;

ValuesAndExpressions::ProhibitUnknownBackslash

Unknown \z etc escapes in strings.

ValuesAndExpressions::ProhibitBarewordDoubleColon

Double-colon barewords Foo::Bar::

Modules::ProhibitModuleShebang

No #! interpreter line in .pm files.

Documentation

Documentation::ProhibitUnbalancedParens

Unbalanced or mismatched ( ) parens, brackets and braces.

Documentation::ProhibitAdjacentLinks

Put commas or some text between adjacent L<> links.

Documentation::ProhibitDuplicateHeadings

Don't duplicate =head headings.

Documentation::ProhibitDuplicateSeeAlso

Don't duplicate L<> links in SEE ALSO sections.

Documentation::ProhibitBadAproposMarkup

Avoid C<> in NAME section, bad for man's "apropos" output.

Documentation::RequireFilenameMarkup

Markup /foo filenames.

Documentation::ProhibitLinkToSelf

Don't L<> link to the document itself.

Documentation::ProhibitParagraphEndComma

Don't end paragraph with "," comma.

Documentation::ProhibitParagraphTwoDots

Don't end paragraph with ".." (stray extra dot).

Documentation::ProhibitVerbatimMarkup

Verbatim paragraphs not expanding C<> etc markup.

Documentation::RequireFinalCut

Have a =cut at end of file.

Documentation::RequireLinkedURLs

Use L<> markup on URLs.

Selecting

You can always enable or disable the policies you do or don't want (see "CONFIGURATION" in Perl::Critic). You may have already realized that there's a wide range of builtin and add-on perlcritic policies ranging from buggy practice to deliberately restrictive or even quite bizarre. You're not meant to pass everything. Some policies may even be mutually contradictory.

The restrictive policies are meant as building blocks for a limited house style. For example ProhibitBarewordDoubleColon here, or something like ProhibitUnlessBlocks. They're usually a matter of personal preference, and "non de gustibus disputandum" as they say in the classics. Trying to follow all of them would give away big parts of the language and quite likely result in very un-typical code.

Some of the restrictive policies are geared towards beginners. ProhibitUnknownBackslash here or RequireInitializationForLocalVars are along those lines. There might for instance be good backslashing which the prohibition doesn't recognise, or local variable initializers make no sense for output variables like $!, once you get to the level of knowing to use local to preserve such globals.

In general the POD of each policy is supposed to explain the motivation so you can see whether you want it or not. If you're not turning off or drastically customizing at least half of all policies then you're either not trying or you're much too easily lead!

OTHER NOTES ^

In most of the perlcritic documentation, including the Pulp add-ons here, policy names appear without the full Perl::Critic::Policy::... class part. In Emacs try man-completion.el to make M-x man automatically expand a suffix part at point, or ffap-perl-module.el for the same to go to the source.

    http://user42.tuxfamily.org/man-completion/index.html

    http://user42.tuxfamily.org/ffap-perl-module/index.html

In perlcritic's output you can ask for %P to see the full policy package name to run perldoc or copy or follow etc. Here's a good output format you can put in your .perlcriticrc. The file:line:column: part is a style Emacs will recognise.

    verbose=%f:%l:%c:\n %P\n %m\n

See Perl::Critic::Violation for all available % escapes. perlcritic.el which comes with perlcritic has regexp patterns for Emacs to recognise the builtin perlcritic formats, but it's easier to output "file:line:column:" in the first place.

SEE ALSO ^

Perl::Critic

HOME PAGE ^

http://user42.tuxfamily.org/perl-critic-pulp/index.html

COPYRIGHT ^

Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014 Kevin Ryde

Perl-Critic-Pulp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Perl-Critic-Pulp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Perl-Critic-Pulp. If not, see <http://www.gnu.org/licenses/>.

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