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

Hi all, Is there any way to get the dependency modules of specified module in Perl. Example, If XXX module have a , b , c are the dependencies , then I need a , b , c as my output. Is there any command or any other way available for my query? Thanks in advance...

  • Comment on Getting the dependencies list of the module .

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Re: Getting the dependencies list of the module .
by moritz (Cardinal) on Mar 29, 2011 at 09:42 UTC
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Re: Getting the dependencies list of the module .
by Anonymous Monk on Mar 29, 2011 at 09:44 UTC
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      Hi all, Can U give me an example program for Module::Depends module. I have tried like this, 
      use YAML;
use Module::Depends;
my $deps = Module::Depends->new->dist_dir( '.' )->find_modules;
print "Our dependencies:\n", Dump $deps->requires;

      [download]
      But I didn't get any result. The dumper is empty. In this code , where I need to give my specified module name. Please help me...
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        You do not want Module::Depends, it relies on reading META.yml, or if you use Module::Depends::Intrusive , on running Build.PL/Makefile.PL

        Read more... example of using Module::Depends (4 kB)
        You want to use scandeps
        Read more... example of using scandeps (4 kB)
        or you want to use Devel::Modlist
        Read more... (705 Bytes)

        or you want to hack with grep

        Read more... grep example (795 Bytes)

        or you want to hack with ack

        Read more... ack example (378 Bytes)
        Or you want to push a coderef onto @INC
        Read more... push to @INC homebrew hack (701 Bytes)
        Or PPI based Module::Used/modules-used 
        $ modules-used Module-Depends-0.15\lib\Module\Depends.pm
base
Class::Accessor::Chained
Cwd
Parse::CPAN::Meta
strict

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        Yup, it seems you asked for modules-used
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[select]
        Is your current working directory (.) your unpacked distribution tree?
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Re: Getting the dependencies list of the module .
by Tux (Canon) on Mar 30, 2011 at 11:59 UTC

    Depend trees can be influenced run-time (think 'eval "use Some::Weird::Module";'). What I find way more usefule that the already suggested modules is showing what is actually loaded, and from where, using Devel::TraceUse.

    The chain can be a lot longer than you expect:

    $ perl -d:TraceUse -MDBI -wle'my $dbh = DBI->connect ("dbi:CSV:")'
Modules used from -e:
   1.  DBI 1.616, -e line 0 [main]
   2.    Carp 1.17, DBI.pm line 159
   3.      strict 1.04, Carp.pm line 303
   4.      warnings 1.09, Carp.pm line 304
   5.      Exporter 5.64_01, Carp.pm line 11
  11.        Exporter::Heavy 5.64_01, Exporter.pm line 16
   6.    DynaLoader 1.10, DBI.pm line 160
   7.      Config, DynaLoader.pm line 25
   9.        Config_heavy.pl, Config.pm line 70
  10.          Config_git.pl, Config_heavy.pl line 1225 [Config]
   8.      AutoLoader 5.71, DynaLoader.pm line 22
  12.    Scalar::Util 1.23, DBI.pm line 290
  13.      vars 1.01, Scalar/Util.pm line 10
  14.        warnings::register 1.01, vars.pm line 7
  15.      List::Util 1.23, Scalar/Util.pm line 12
  16.        XSLoader 0.10, List/Util.pm line 26
  17.    DBD::CSV 0.31, DBI.pm line 777 (eval 3) [DBI::_firesafe]
  18.      Text::CSV_XS 0.81, DBD/CSV.pm line 54 [DBD::CSV::dr]
  19.      DBD::File 0.4, DBD/CSV.pm line 222 [DBD::CSV::Statement]
  20.        base 2.15, DBD/File.pm line 34
  21.          DBI::DBD::SqlEngine 0.03, base.pm line 91 (eval 5)
  22.            DBI::SQL::Nano 1.014600, DBI/DBD/SqlEngine.pm line 27
+ [base]
  23.              SQL::Statement 1.33, DBI/SQL/Nano.pm line 34
  24.                SQL::Parser 1.33, SQL/Statement.pm line 18
  25.                  constant 1.20, SQL/Parser.pm line 17
  26.                  Params::Util 1.03, SQL/Parser.pm line 19
  27.                    overload 1.10, Params/Util.pm line 60
  28.                Clone 0.31, SQL/Statement.pm line 25
  29.                Errno 1.11, SQL/Statement.pm line 26
  30.                sort 2.01, SQL/Statement.pm line 1100
  31.                SQL::Eval 1.33, SQL/Statement.pm line 2187 [SQL::
+Statement::TempTable]
  32.                SQL::Statement::RAM 1.33, SQL/Statement.pm line 2
+0
  33.                SQL::Statement::TermFactory 1.33, SQL/Statement.p
+m line 21
  34.                  Data::Dumper 2.128, SQL/Statement/TermFactory.p
+m line 11
  35.                    bytes 1.04, Data/Dumper.pm line 683
  36.                  SQL::Statement::Term 1.33, SQL/Statement/TermFa
+ctory.pm line 6
  37.                  SQL::Statement::Operation 1.33, SQL/Statement/T
+ermFactory.pm line 7
  38.                  SQL::Statement::Placeholder 1.33, SQL/Statement
+/TermFactory.pm line 8
  39.                  SQL::Statement::Function 1.33, SQL/Statement/Te
+rmFactory.pm line 9
  40.                    SQL::Statement::Functions 1.33, SQL/Statement
+/Function.pm line 58 [SQL::Statement::Function::UserFunc]
  41.                SQL::Statement::Util 1.33, SQL/Statement.pm line 
+22
  42.        File::Spec 3.33, DBD/File.pm line 171 [DBD::File::db]
  43.          File::Spec::Unix 3.33, File/Spec.pm line 22
  44.        Cwd 3.33, DBD/File.pm line 172 [DBD::File::db]
  45.        Tie::Hash 1.03, DBD/File.pm line 503 [DBD::File::TieMeta]
  46.        IO::File 1.14, DBD/File.pm line 741 [DBD::File::Table]
  47.          Symbol 1.07, IO/File.pm line 131
  48.          SelectSaver 1.02, IO/File.pm line 132
  49.          IO::Seekable 1.1, IO/File.pm line 133
  50.            IO::Handle 1.28, IO/Seekable.pm line 101
  51.              IO 1.25_02, IO/Handle.pm line 266
  52.            Fcntl 1.06, IO/Seekable.pm line 104
  53.        File::Basename 2.78, DBD/File.pm line 742 [DBD::File::Tab
+le]

    [download]

    Enjoy, Have FUN! H.Merijn
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