Dean Arnold


Module::Mapper - Find source for modules and optionally map to another directory


        use Module::Mapper;
        #       explicit mode
        $options = (
                All => 1,
                IncludePOD => 1,
                Verbose => sub { print STDERR $_[0], "\n"; },
                UseINC => 1,
                Libs => [ './lib', './otherlib' ],
                Scripts => [ './bin/mapmodule' ],
                Output => './classdoc',
                Modules => [ 'DBD', 'Module::Mapper', 'Some::Other::Module' ]
        my $modules = find_sources( %options );
        #       project mode
        $options = (
                IncludePOD => 1,
                Verbose => sub { print STDERR $_[0], "\n"; },
                Output => './classdoc',
                Project => './project'
        my $modules = find_sources( %options );


Searches specified directories and/or @INC (or both) for the specified module(s) and/or executable(s). Returns a hashref mapping the module to an arrayref containing the full path where the sources were found and (optionally) a mapping output path if the Output option was specified.

If neither Scripts or Modules are specified, the search is performed in "project" mode, which assumes that all scripts and modules within a project directory tree (specified by Project, or defaults to './') are to be scanned and remapped. Any files within the "$options{Project}/bin" directory are assumed to be scripts; all files ending in '.pm' and '.pod' in all directories beneath the "$options{Project}/lib" directory are assumed to be modules.


Only a single method is exported:

$modules = find_sources( %options )

Uses the options in %options to direct a search for modules and executable, and optionally generate a remapped paths for them.

If an error occurs during the search (e.g., a nonexistant directory is specified in Libs), undef is returned with an error message in $@.

On success, the returned hashref maps the found module names and/or provided executable script paths to an arrayref consisting of

  • the full pathname of the source file for the module or script

  • the remapped pathname of the source file, with the root directory replaced with a directory specified via the Output option described below.

  • the full pathname of any associated POD file for the module (if any)

  • the fully remapped pathname of the POD file (if any), with the root directory replaced with a directory specified via the Output option described below.

%options may include the following:

All => $boolean

Causes each module to be treated as a potential root namespace, and locates/maps all child modules within the same root directory. Does not effect script searches.

IncludePOD => $boolean

Causes POD files (ending in '.pod') to be included in the search/map operation, and treats as an acceptable alternative to the source file (ending in '.pm').

Verbose => \&coderef

Calls the provided coderef with diagnostic message as the search progresses.

UseINC => $boolean

Causes the paths in @INC to be included in the search. Default is to only search directories explicit specified via Libs.

Libs => \@locallibs

Contains a list of directories to be searched for any specified modules. The libraries are searched in the order they appear in @locallibs; if UseINC is specified, directories in <@INC> are searched after @locallibs.

Scripts => \@scripts

Contains a list of fully qualified script paths to be located and optionally remapped. Does not apply the same directory search method as for modules.

Output => $outpath

Specifies a root directory to be used to remap the modules and scripts. If specified, then the output paths are mapped as follows:

        Source Type         Mapped Location
        -----------         ---------------
        executables         <$outpath>/bin
        local modules       <$outpath>/blib
        @INC modules        <$outpath>/lib

NOTE that the output maths are not created; rather, a file specification is provided which can be used by the caller to create the path via (e.g.) File::Path::mkpath().

Modules => \@modules

Contains a list of Perl module names or namespaces to search for in the specified @localibs and/or @INC. If the All option is enabled, then elements may be top level namespaces within which to search for all child modules.

Project => $projpath

Specifies a project root directory to be used for project mode searches. If not specified, defaults to './'.




This module was developed primarily to support Pod::Classdoc and PPI::HTML::CodeFolder, but may be generally useful.



Copyright(C) 2007, Dean Arnold, Presicient Corp., USA. All rights reserved.

Permission is granted to use this software under the terms of the Perl Artistic License.

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