SYNOPSIS

     # equivalent to -Mlib::none
     % perl -Mlib::filter=allow_core,0,allow_noncore,0 yourscript.pl
    
     # equivalent to -Mlib::core::only
     % perl -Mlib::filter=allow_noncore,0 yourscript.pl
    
     # allow core modules plus some more modules
     % perl -Mlib::filter=allow_noncore,0,allow,'List::MoreUtils;List::MoreUtils::PP;List::MoreUtils::XS' yourscript.pl
    
     # allow additional modules by pattern
     % perl -Mlib::filter=allow_noncore,0,allow_re,'^DateTime::.*' yourscript.pl
    
     # allow additional modules listed in a file
     % perl -Mlib::filter=allow_noncore,0,allow_list,'^DateTime::.*' yourscript.pl
    
     # allow additional modules found in some dirs
     % perl -Mlib::filter=allow_noncore,0,extra_path,'.:proj/lib' yourscript.pl

DESCRIPTION

    This pragma installs a hook in @INC to allow only some modules from
    being found/loadable. This pragma is useful for testing, e.g. fatpacked
    script and is more flexible than lib::none and lib::core::only.

    lib::none is absolutely ruthless: your fatpacked script must fatpack
    all modules (including things like strict, warnings) as lib::none
    empties @INC and removes perl's ability to load any more modules.

    lib::core::only only puts core paths in @INC so your fatpacked script
    must contain all non-core modules. But this is also too restrictive in
    some cases because we cannot fatpack XS modules and want to let the
    script load those from filesystem.

    lib::filter makes it possible for you to, e.g. only allow core modules,
    plus some other modules (like some XS modules).

    To use this pragma:

     use lib::filter %opts;

    Known options:

      * allow_core => bool (default: 1)

      * allow_noncore => bool (default: 1)

      * allow => str

      Add a semicolon-separated list of modules to allow.

      * disallow => str

      Add a semicolon-separated list of modules to disallow. This will take
      precedence over any allowed list.

      * allow_re => str

      Allow modules matching regex pattern.

      * disallow_re => str

      Disallow modules matching regex pattern. This will take precedence
      over any allowed list.

      * allow_list => filename

      Read a file containing list of modules to allow (one module per
      line).

      * disallow_list => filename

      Read a file containing list of modules to disallow (one module per
      line). This wlll take precedence over any allowed list.

      * extra_inc => str

      Add additional path to search modules in. String must be
      colon-separated paths.

SEE ALSO

    lib::none

    lib::core::only