Why don't some CPAN modules append perllocal?

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

perl -MExtUtils::Installed -le '$_=ExtUtils::Installed->new->modules;p
+rint'
[download]

1650

perl -le '@_=grep/Module/,split/\n/,`perldoc -uT perllocal`;print scal
+ar@_'
[download]

1472


perl -MExtUtils::Installed -le '@_=ExtUtils::Installed->new->modules;p
+rint for sort{lc$a cmp lc$b}@_' >mod.ext

perl -e '@_=grep/Module/,`perldoc -uT perllocal`;for(@_){s/.*?\|([^>]+
+)>/$1/}print for sort{lc$a cmp lc$b} @_' >mod.loc

diff -y mod.ext mod.loc
[download]

diff -y mod.ext mod.loc|grep '<'|wc -l
[download]

232

diff -y mod.ext mod.loc|grep '>'|wc -l
[download]

Comment on Why don't some CPAN modules append perllocal? Select or Download Code

Replies are listed 'Best First'.
Re: Why don't some CPAN modules append perllocal? by hippo (Bishop) on Jan 29, 2023 at 12:16 UTC
Because some CPAN modules use Module::Build to install themselves and as was discussed recently Module::Build doesn't write to perllocal. 🦛	[reply]
Re: Why don't some CPAN modules append perllocal? by syphilis (Archbishop) on Jan 29, 2023 at 04:07 UTC
Can you provide examples of some that don't append perllocal ? These days I build perl such that the different architectures sit alongside each other. This means that any (pure perl) module that gets installed into perl/site/lib is immediately accessible to all architectures. But the only perllocal that gets appended is the one for the architecture I was actually running when I installed that pure perl module. Hence, the perllocals for all but one of those architectures will not mention this pure perl module, even though the module is accessible to all of the different architectures. OTOH, it seems that ExtUtils::Installed is aware of all of the modules that have been installed - not just those modules that were appended to perllocal. I don't know if that is relevant to what you are seeing. Cheers, Rob	[reply]
Re^2: Why don't some CPAN modules append perllocal? by Anonymous Monk on Jan 29, 2023 at 06:03 UTC
This command lists the modules missing from perllocal, for normal installations (creates 2 files mod.ext and mod.loc): perl -MExtUtils::Installed -le '@_=ExtUtils::Installed->new->modules;p +rint for sort{lc$a cmp lc$b}@_' >mod.ext;perl -e '@_=grep/Module/,`pe +rldoc -uT perllocal`;for(@_){s/.*?\\|([^>]+)>/$1/}print for sort{lc$a +cmp lc$b}@_' >mod.loc;diff -y mod.ext mod.loc\|grep '<' [download] Here are my CPAN modules known to the "modules" method of ExtUtils::Installed but missing from `perldoc perllocal \| grep 'Module'`: Acme::JavaTrace Acme::MetaSyntactic::errno Algorithm::MarkovChain Algorithm::NaiveBayes aliased Alien::Base::ModuleBuild Alien::FLTK Alien::TALib Alien::wxWidgets Apache::LogFormat::Compiler App::AsciiChart App::cpm App::FatPacker::Simple App::perl2js App::perlfind App::SourcePlot Array::Compare Astro-Montenbruck Astro::App::Satpass2 Astro::Catalog Astro::Coord::ECI Astro::Coords Astro::FITS::Header Astro::PAL Astro::SIMBAD::Client Astro::Telescope Astro::WaveBand BackPAN::Index CAM::PDF Carp::Parse Catalyst::Controller::POD Catalyst::Engine::PSGI CGI::Application CGI::Compress::Gzip CGI::Simple CGI::Wiki::Formatter::Multiple CGI::Wiki::Kwiki CGI::Wiki::Search::DB Chart::Plotly Class::Accessor::Chained Class::C3::Adopt::NEXT Class::Factory::Util Class::Prototyped Class::PublicPrivate Class::Std CLI::Coin::Toss Clipboard Color::Brewer Command::Runner Compiler::Parser Config::Std Convert::Color Cookie::Baker CPAN::Audit criticism Cwd::Guard Data::Dump::Streamer Data::Format::Pretty Data::Generate Data::Serializer Data::Transform::ExplicitMetadata DateTime::Astro DateTime::Calendar::Discordian DateTime::Format::ISO8601 DBIx::Admin::CreateTable DBIx::Table2Hash Devel::CheckCompiler Devel::Ditto Directory::Scratch Distribution::Metadata Error ExtUtils::XSpp File::CountLines File::Find::Object File::Map File::RotateLogs File::ShareDir::Tarball File::Type Furl Future Future::AsyncAwait Future::Mojo GD::Sparkline Geo::WebService::Elevation::USGS Graph::Easy Graphics::ColorNames::WWW Hash::FieldHash HTML::Escape HTML::FormatText::WithLinks HTML::GenToc HTML::LinkList HTML::Notebook HTML::Parser::Simple HTML::Show HTML::SimpleParse HTML::TagCloud HTML::Tree HTTP::CookieMonster HTTP::Entity::Parser Image::Term256Color Imager::Filter::Bakumatsu Imager::Filter::RoundedCorner IO::Async IO::Handle::Util IO::Interface Kwiki::RenamePage L Lexical::SealRequireHints Lingua::EN::CommonMistakes Lingua::EN::Conjugate Lingua::EN::Contraction Lingua::EN::Fathom Lingua::Stem Lingua::Stem::Snowball::No Lingua::Stem::Snowball::Se List::Flatten List::PowerSet List::UtilsBy Log::QnD LWP::UserAgent::DNS::Hosts Mac::CocoaDialog Mac::Pasteboard Math::Factor::XS Math::GComplex Math::MatrixReal Math::Prime::XS MLDBM Modern::Perl Module::Build Module::Build::Pluggable Module::Build::Pluggable::PPPort Module::Build::Tiny Module::Build::XSUtil Module::ExtractUse Module::List Module::Runtime Module::Util MooseX::Clone MooseX::Daemonize MooseX::ExtraArgs MooseX::Getopt MooseX::LazyRequire MooseX::Object::Pluggable MooseX::Role::Parameterized MooseX::Singleton MooseX::Types MooseX::Types::Path::Class Mouse Music::Chord::Note Net::Async::HTTP Number::Misc Object::InsideOut OCR::PerfectCR Parallel::Pipes Params::Validate Parse::RecDescent Path::Class ~~Perl~~ (The perl 'core' is given the special name 'Perl'.) Perl4::CoreLibs Perl::Critic Perl::Phase PerlIO::Layers Perlito5 Pod::Browser Pod::LaTeX Pod::Section Pod::Strip Pod::Text::Color::Delight Pod::Webserver POSIX::strftime::Compiler Postal::US::State PPIx::Regexp PPIx::Utilities Readonly Regexp::Debugger Starman Statistics::Autocorrelation Statistics::Data Statistics::Descriptive Statistics::Zed String::Dump String::Random String::Util Struct::Dumb SUPER SVN::Dump Sweat Syntax::Feature::EachOnArray Syntax::Keyword::Try Task::Unicode Template::Liquid Term::Drawille Term::Shell Test::Compile Test::Deep::JSON Test::Differences Test::Expect Test::Fake::HTTPD Test::Fork Test::Identity Test::MockModule Test::Perl::Critic Test::Pod::LinkCheck::Lite Test::Refcount Test::Toolbox Test::Trap Text::Affixes Text::Aligner Text::Flow Text::Reform Text::UpsideDown Text::WikiFormat Text::Xslate Thesaurus Tie::IxHash Tie::RangeHash Time::Format Tk::Canvas::GradientColor Tree::Node Unicode::CaseFold Unicode::Stringprep Unicode::Util Unix::Lsof Unix::Uptime URI::Find Web::NewsAPI WWW::Form::UrlEncoded WWW::YouTube::Download XML::Entities XML::RSS XML::Rules Zoidberg	[reply] [d/l]
Re^3: Why don't some CPAN modules append perllocal? by syphilis (Archbishop) on Jan 29, 2023 at 07:53 UTC
I hypothesize that if the module is built and installed using ExtUtils::MakeMaker (Makefile.PL) then perllocal gets updated. But if the module is built and installed using Module::Build (Build.PL) then perllocal does not get updated. If you can locate a module in that list you provided that does not provide a Build.PL file, then obviously my hypothesis is an unsatisfactory one. (Either it's plain wrong, or there are other factors involved.) I can definitely see the message "Appending installation info to D:\perl .../perllocal.pod" when the Makefile.PL gets run, but no such equivalent message when Build.PL gets run. But I've only looked at a very small sample ... and I've just now found this very pertinent bug report. Cheers, Rob	[reply]
Re^4: Why don't some CPAN modules append perllocal? by Anonymous Monk on Jan 29, 2023 at 12:37 UTC
Re^5: Why don't some CPAN modules append perllocal? by syphilis (Archbishop) on Jan 29, 2023 at 13:58 UTC
Re^4: Why don't some CPAN modules append perllocal? by Anonymous Monk on Jan 29, 2023 at 17:27 UTC
Re^5: Why don't some CPAN modules append perllocal? by hv (Prior) on Jan 29, 2023 at 19:54 UTC
Some notes below your chosen depth have not been shown here
Re: Why don't some CPAN modules append perllocal? by Anonymous Monk on Jan 29, 2023 at 08:31 UTC
how were the modules installed, cpan or package manager? is it the system perl or perlbrew?	[reply]

Back to Seekers of Perl Wisdom