How do I get a list of installed CPAN modules

Question

Aside from trying  perldoc  lt module name gt    individually for any CPAN module that takes my fancy or going through the file system and looking at the directories I have no idea what modules we have installed    What s the easiest way to just get a big list of every CPAN module installed  From the command line or otherwise

User · Answer

All those who can t install perldoc  or other modules  and want to know what modules are available  CPAN or otherwise   the following works for linux and Mingw32 64   grep -RhIP   package  A-Z   w       perl -e  print join      INC     sed  s package       sort   uniq   Yes  it s messy   Yes  it probably reports more than you want   But if you pipe it into a file  you can easily check for  say  which dbm interfaces are present    grep -RhIP   package  A-Z   w       perl -e  print join      INC     sed  s package       sort   uniq  gt  modules-installed  cat modules-installed   grep -i dbm   AnyDBM File  Memoize  AnyDBM File  Memoize  NDBM File  Memoize  SDBM File  WWW  RobotRules  AnyDBM File    Which is why I ended up on this page  disappointed    I realise this doesn t answer the OP s question exactly  but I m posting it for anybody who ended up here for the same reason I did   That s the problem with stack    it s almost imposisble to find the question you re asking  even when it exists  yet stack    is nearly always google s top hit

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Here is yet another command-line tool to list all installed  pm files   Find installed Perl modules matching a regular expression   Portable  only uses core modules  Cache option for faster look-up s Configurable display options

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For Linux the easiest way to get is   dpkg -l   grep  perl

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for M in  perldoc -t perllocal grep Module  sed -e  s            do V  perldoc -t perllocal awk    M  y 1 next y   grep VERSION  head -n 1   printf   30s  s n    M    V   done  sort               Class  Inspector          VERSION  1 28                      Crypt  CBC          VERSION  2 33                 Crypt  Rijndael          VERSION  1 11                      Data  Dump          VERSION  1 22                     DBD  Oracle          VERSION  1 68                             DBI          VERSION  1 630                     Digest  SHA          VERSION  5 92             ExtUtils  MakeMaker          VERSION  6 84                         install          VERSION  6 84                 IO  SessionData          VERSION  1 03                 IO  Socket  SSL          VERSION  2 016                            JSON          VERSION  2 90                    MIME  Base64          VERSION  3 14                    MIME  Base64          VERSION  3 14                     Mozilla  CA          VERSION  20141217                     Net  SSLeay          VERSION  1 68                          parent          VERSION  0 228                    REST  Client          VERSION  271                      SOAP  Lite          VERSION  1 08                    Task  Weaken          VERSION  1 04                   Term  ReadKey          VERSION  2 31                  Test  Manifest          VERSION  1 23                    Test  Simple          VERSION  1 001002                    Text  CSV XS          VERSION  1 16                       Try  Tiny          VERSION  0 22                     XML  LibXML          VERSION  2 0108           XML  NamespaceSupport          VERSION  1 11                  XML  SAX  Base          VERSION  1 08

User · Answer

Try  perldoc -l      perldoc -l  Log  Dispatch  usr local share perl 5 26 1 Log Dispatch pm

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The answer can be found in the Perl FAQ list   You should skim the excellent documentation that comes with Perl  perldoc perltoc

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the Perl cookbook contains several iterations of a script  pmdesc  that does what you want   Google-search for  Perl Cookbook pmdesc  and you ll find articles on other Q amp A Sites  several code listings on the net  a discussion of the solution  and even some refinements

User · Answer

I like to use the CPAN  r  command for this  You can get into the CPAN shell with the old style   sudo perl -MCPAN -e shell   or  on most newer systems  there is a  cpan  command  so this command will get you to the shell   sudo cpan    You typically have to use  sudo  to run it as root  or use  su -  to become root before you run it  unless you have cpan set up to let you run it as a normal user  but install as root  If you don t have root on this machine  you can still use the CPAN shell to find out this information  but you won t be able to install modules  and you may have to go through a bit of setup the first time you run it    Then  once you re in the cpan shell  you can use the  r  command to report all installed modules and their versions  So  at the  cpan   prompt  type  r   This will list all installed modules and their versions  Use     to get some more help

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You can get list of perl modules installed in you system by using instmodsh command in your terminal It will ask you three option in order to enhance the output they are       l            - List all installed modules    m  lt module gt    - Select a module    q            - Quit the program

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On Linux Unix I use this simple command   perl -e  print qx find    -name    pm   foreach    INC        It scans all folder in  INC and looks for any   pm file

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You can try ExtUtils-Installed  but that only looks in  packlists  so it may miss modules that people moved things into  INC by hand   I wrote App-Module-Lister for a friend who wanted to do this as a CGI script on a non-shell web hosting account  You simple take the module file and upload it as a filename  that your server will treat as a CGI script  It has no dependencies outside of the Standard Library  Use it as is or steal the code   It outputs a list of the modules and their versions    Tie  Cycle      1 15 Tie  IxHash     1 21 Tie  Toggle     1 07 Tie  ToObject   0 03 Time  CTime     99 062201 Time  DaysInMonth       99 1117 Time  Epoch     0 02 Time  Fuzzy     0 34 Time  JulianDay 2003 1125 Time  ParseDate 2006 0814 Time  Timezone  2006 0814   I ve been meaning to add this as a feature to the cpan tool  so I ll do that too   Time passes  And  now I have a -l switch in cpan  I have a few other things to do with it before I make a release  but it s in github  If you don t want to wait for that  you could just try the -a switch to create an autobundle  although that puts some Pod around the list   Good luck

User · Answer

I wrote a perl script just yesterday to do exactly this  The script returns the list of perl modules installed in  INC using the      as the separator  Call the script using -   perl perlmod pl   OR   perl perlmod pl  lt module name gt   Case-insensitive eg  perl perlmod pl ftp    As of now the script skips the current directory      since I was having problems with recursing soft-links but you can include it by changing the grep function in line 17 from     grep                   INC   to just    INC   The script can be found here

User · Answer

Try the following command  instmodsh

User · Answer

Try man perllocal or perldoc perllocal

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Here s a script by  JamesThomasMoon1979 rewritten as a one-liner perl -MExtUtils  Installed -e   i ExtUtils  Installed- gt new           print  quot     quot   i- gt version      quot  n quot  for  i- gt modules

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Here s a really hacky way to do it in  nix  you ll get some stuff you don t really care about  ie  warnings  register etc   but it should give you a list of every  pm file that s accessible via perl     for my  path   INC        my  list    ls -R  path      pm       for   list            s  path    g          s       g          s   pm   g          print

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cd  the lib dir of your perl installation perldoc   find   -name perllocal pod    Windows users just do a Windows Explorer search to find it

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This works for me  perl -e  print join   n   INC

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This is what I do  perl -M cpan module  If you don t receive any errors there is a good chance that the module is installed

User · Answer

The following worked for me     perldoc perllocal   grep Module   perldoc perllocal   grep -E  VERSION Module

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To walk through the  INC directory trees without using an external program like ls 1   one could use the File  Find  Rule module  which has a nice declarative interface   Also  you want to filter out duplicates in case previous Perl versions contain the same modules  The code to do this looks like       usr bin perl -l  use strict  use warnings  use File  Find  Rule   my  seen  for my  path   INC        for my  file  File  Find  Rule- gt name    pm  - gt in  path             my  module   substr  file  length  path  1            module    s  pm              module    s           g          print  module unless  seen  module               At the end of the run  you also have all your module names as keys in the  seen hash  The code could be adapted to save the canonical filename  given in  file  as the value of the key instead of a count of times seen

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perldoc perllocal   Edit  There s a  little  more info about it in the CPAN FAQ

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As you enter your Perl script you have all the installed modules as  pm files below the folders in  INC so a small bash script will do the job for you      bin bash  echo -e -n  Content-type  text plain n n   inc  perl -e         n   print  INC     for d in  inc do    find  d -name    pm  done

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perl -MFile  Find find -MFile  Spec  Functions -Tlwe  find   wanted   gt  sub   print canonpath    if    pm z     no chdir   gt  1     INC

User · Answer

This is answered in the Perl FAQ  the answer which can be quickly found with perldoc -q installed   In short  it comes down to using ExtUtils  Installed or using File  Find  variants of both of which have been covered previously in this thread   You can also find the FAQ entry  How do I find which modules are installed on my system   in perlfaq3  You can see a list of all FAQ answers by looking in perlfaq

User · Answer

Here s a Perl one-liner that will print out a list of installed modules   perl -MExtUtils  Installed -MData  Dumper -e   my   inst    ExtUtils  Installed- gt new    print Dumper  inst- gt modules        Just make sure you have Data  Dumper installed

User · Answer

perldoc -q installed  claims that cpan -l will do the trick  however it s not working for me  The other option   cpan -a  does spit out a nice list of installed packages and has the nice side effect of writing them to a file

User · Answer

It s worth noting that perldoc perllocal will only report on modules installed via CPAN   If someone installs modules manually  it won t find them   Also  if you have multiple people installing modules and the perllocal pod is under source control  people might resolve conflicts incorrectly and corrupt the list  this has happened here at work  for example    Regrettably  the solution appears to be walking through  INC with File  Find or something similar   However  that doesn t just find the modules  it also finds related modules in a distribution   For example  it would report TAP  Harness and TAP  Parser in addition to the actual distribution name of Test  Harness  assuming you have version 3 or above    You could potentially match them up with distribution names and discard those names which don t match  but then you might be discarding locally built and installed modules   I believe brian d foy s backpan indexing work is supposed to have code to hand it at  pm file and it will attempt to infer the distribution  but even this fails at times because what s in a package is not necessarily installed  see Devel  Cover  Inc for an example

User · Answer

Here a script which would do the trick   use ExtUtils  Installed   my  inst   ExtUtils  Installed- gt new    my  modules    inst- gt modules    foreach  module   modules          print  module    -     inst- gt version  module     n       head1 ABOUT  This scripts lists installed cpan modules using the ExtUtils modules   head1 FORMAT  Prints each module in the following format  lt name gt  -  lt version gt    cut

[perl] How do I get a list of installed CPAN modules?

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