ExtUtils::Installed fails to find Catalyst because it doesn't have a .packlist

[Anonymous Monk]

% perl -MExtUtils::Installed -le 'print for ExtUtils::Installed->new->
+files("Catalyst")'
Catalyst is not installed at -e line 1.

% perl -MModule::Metadata -le 'print Module::Metadata->new_from_module
+("Catalyst")->{filename}'                  
/perl5/perlbrew/perls/perl-5.42.0/lib/site_perl/5.42.0/Catalyst.pm

Compare to module with a .packlist:

% perl -MExtUtils::Installed -le 'print ExtUtils::Installed->new->pack
+list("CGI")->packlist_file'     
/perl5/perlbrew/perls/perl-5.42.0/lib/site_perl/5.42.0/darwin-2level/a
+uto/CGI/.packlist

ls -l /perl5/perlbrew/perls/perl-5.42.0/lib/site_perl/5.42.0/darwin-2l
+evel/auto/CGI

-rw-r--r--    1 user  staff   1.3K Jan  2 00:34 .packlist
drwxr-xr-x    3 user  staff    96B Jan 10 05:23 Ajax
drwxr-xr-x    3 user  staff    96B Jan 10 05:24 Application
drwxr-xr-x    3 user  staff    96B Jan 10 05:32 Compress
drwxr-xr-x    3 user  staff    96B Jan 10 05:33 PSGI
drwxr-xr-x    3 user  staff    96B Jan 10 05:33 Prototype
drwxr-xr-x    3 user  staff    96B Dec 17 11:39 Simple
drwxr-xr-x    3 user  staff    96B Dec 17 11:39 Struct
drwxr-xr-x    3 user  staff    96B Dec 17 11:39 Wiki

% ls -l /perl5/perlbrew/perls/perl-5.42.0/lib/site_perl/5.42.0/darwin-
+2level/auto/Catalyst            

drwxr-xr-x    4 user  staff   128B Apr 15 07:00 Action
drwxr-xr-x    4 user  staff   128B Apr 15 07:00 Controller
drwxr-xr-x    3 user  staff    96B Dec 17 11:46 Devel
drwxr-xr-x    4 user  staff   128B Apr 15 07:00 Engine
drwxr-xr-x    3 user  staff    96B Dec 17 11:46 Manual
drwxr-xr-x    5 user  staff   160B Dec 17 11:46 Plugin
drwxr-xr-x    3 user  staff    96B Dec 17 11:45 Runtime

[Corion]

So consider (re)installing Catalyst with a package installer that creates a .packlist file, or create it yourself?

[roho]

I agree with Corion's advice. I prefer the package installer route that creates .packlist for you.

[Anonymous Monk]

I think ExtUtils::Install creates the .packlist during make install. It was installed by cpanm like all my other modules and a reinstall did not create a .packlist. Going through the Catalyst files like Makefile.PL I don't see a deliberate effort to delete the .packfile so maybe something's wrong with how it interacts with ExtUtils::Install? Creating my own .packlist files for random CPAN modules is not within the scope of my application. I'd rather know what is breaking the perl toolchain here. Thanks

[Corion]

Meta: Consider adding such information to your top post in the first place instead of waiting for replies trying to find out what your actual problem or question is. Maybe also consider phrasing the title of your post as a question instead of a statement of what you see.

Since you don't tell us anything about the difference between how you installed Catalyst versus how you installed other modules, there is very little we can do without your help here. Consider finding out what the difference is in installation between the two distributions.

[Haarg]

ExtUtils::Installed's files method expects you to pass it the "main" module of a dist. For Catalyst, this is Catalyst::Runtime.

$ perl -MExtUtils::Installed -le 'print for ExtUtils::Installed->new->
+files("Catalyst::Runtime")'
.../bin/catalyst.pl
.../lib/perl5/Catalyst/Exception/Detach.pm
.../lib/perl5/Catalyst/Script/CGI.pm
.../lib/perl5/Catalyst/Exception/Basic.pm
.../lib/perl5/Catalyst/Base.pm
.../lib/perl5/Catalyst/ActionContainer.pm
.../lib/perl5/Catalyst/Test.pm
.../lib/perl5/Catalyst/PSGI.pod
.../lib/perl5/Catalyst/ActionChain.pm
.../lib/perl5/Catalyst/Delta.pod
.../lib/perl5/Catalyst/Component.pm
.../lib/perl5/Catalyst.pm
.../lib/perl5/Catalyst/Stats.pm
.../lib/perl5/Catalyst/Component/ApplicationAttribute.pm
.../lib/perl5/Catalyst/Engine.pm
.../lib/perl5/Catalyst/Exception.pm
.../lib/perl5/Catalyst/Dispatcher.pm
.../lib/perl5/Catalyst/Runtime.pm
.../lib/perl5/Catalyst/DispatchType.pm
.../lib/perl5/Catalyst/Contributing.pod
.../lib/perl5/Catalyst/Controller.pm
.../lib/perl5/Catalyst/ActionRole/QueryMatching.pm
.../lib/perl5/Catalyst/Script/Test.pm
.../lib/perl5/Catalyst/UTF8.pod
.../lib/perl5/Catalyst/Engine/HTTP.pm
.../lib/perl5/Catalyst/ActionRole/ConsumesContent.pm
.../lib/perl5/Catalyst/Script/FastCGI.pm
.../lib/perl5/Catalyst/ActionRole/Scheme.pm
.../lib/perl5/Catalyst/RouteMatching.pod
.../lib/perl5/Catalyst/Response/Writer.pm
.../lib/perl5/Catalyst/EngineLoader.pm
.../lib/perl5/Catalyst/Script/Server.pm
.../lib/perl5/Catalyst/Script/Create.pm
.../lib/perl5/Catalyst/DispatchType/Index.pm
.../lib/perl5/Catalyst/Request/Upload.pm
.../lib/perl5/Catalyst/ActionRole/HTTPMethods.pm
.../lib/perl5/Catalyst/Action.pm
.../lib/perl5/Catalyst/DispatchType/Path.pm
.../lib/perl5/Catalyst/DispatchType/Default.pm
.../lib/perl5/Catalyst/Model.pm
.../lib/perl5/Catalyst/Exception/Go.pm
.../lib/perl5/Catalyst/Middleware/Stash.pm
.../lib/perl5/Catalyst/Response.pm
.../lib/perl5/Catalyst/ScriptRole.pm
.../lib/perl5/Catalyst/View.pm
.../lib/perl5/Catalyst/Component/ContextClosure.pm
.../lib/perl5/Catalyst/Exception/Interface.pm
.../lib/perl5/Catalyst/DispatchType/Chained.pm
.../lib/perl5/Catalyst/Upgrading.pod
.../lib/perl5/Catalyst/Utils.pm
.../lib/perl5/Catalyst/Log.pm
.../lib/perl5/Catalyst/Request/PartData.pm
.../lib/perl5/Catalyst/ScriptRunner.pm
.../lib/perl5/Catalyst/Plugin/Unicode/Encoding.pm
.../lib/perl5/Catalyst/Request.pm
.../lib/perl5/Catalyst/ClassData.pm

[hippo]

ls -l /perl5/perlbrew/perls/perl-5.42.0/lib/site_perl/5.42.0/darwin-2l
+evel/auto/CGI

-rw-r--r--    1 user  staff   1.3K Jan  2 00:34 .packlist
drwxr-xr-x    3 user  staff    96B Jan 10 05:23 Ajax
drwxr-xr-x    3 user  staff    96B Jan 10 05:24 Application
drwxr-xr-x    3 user  staff    96B Jan 10 05:32 Compress

That doesn't look right to me. ls does not display dotfiles by default, that requires the -a option or similar. Either you are not running a bare ls (eg. using an alias or function or other wrapper) or something else is going on which you have not explained. Either way, this casts doubt on the following snippet in which you use ls -l to "show" the absence of a dotfile.

Assuming the dotfile absence is real, however, my best guess would be that something in the Catalyst installation has not completed entirely as expected for some reason or another. It is a bit of a beast in terms of dependencies so a snag in any of those could potentially bubble up and cause a problem with the overall installation. Either go through the cpanm logfile to find it or else try installing Catalyst by hand.

[Anonymous Monk]

Good catch! You're right about the -a option but missed the -h :-). I do use an alias (alias ll='ls -lha') and replaced it with ls -l to prevent confusion but just created more! Anyway the dotfile absence from /Catalyst is real but I did find 10 .packlists under /Catalyst:

/Catalyst/Action/RenderView/.packlist
/Catalyst/Controller/POD/.packlist
/Catalyst/Devel/.packlist
/Catalyst/Engine/PSGI/.packlist
/Catalyst/Manual/.packlist
/Catalyst/Plugin/ConfigLoader/.packlist
/Catalyst/Plugin/Session/.packlist
/Catalyst/Plugin/Session/State/Cookie/.packlist
/Catalyst/Plugin/Static/Simple/.packlist
/Catalyst/Runtime/.packlist

Thanks for your time.