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--- usage_on_fly [2012/02/23 18:09] – created k2patel
+++ usage_on_fly [2020/08/10 02:35] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 ==== To install Modules Locally ====
-Best way to install local module is to install module "local::lib".\\
-[[http://search.cpan.org/~apeiron/local-lib/ | CPAN Local::lib ]]
+local::lib enables you to install modules into a specified directory, \\
+without requiring root or administrator access. See the bootstrapping technique for how to get started.\\
+You can create a directory per user/project/company and deploy to other servers,\\
+by copying the directory (as long as you are on the same operating system).
+[[http://search.cpan.org/~apeiron/local-lib/ | CPAN Local::lib ]]\\
 But you can also manually do it.
+**First export your username**
 <code bash>
+ export username=ketan
+</code>
+<note warning>Still you have to modify / change "$username" manually at many places</note>
+**create the .cpan directories**
+<code oobas>
+ mkdir $HOME/.cpan/
+ mkdir $HOME/.cpan/CPAN/
+ # This is so it ignores the global CPAN config
+ echo "\$CPAN::Config->{cpan_home}='/home/$username/.cpan';" > /home/$username/.cpan/CPAN/MyConfig.pm
+</code>
+Then Execute a CPAN shell
+<code oobas>
+ perl -MCPAN -e shell
+OR
+ cpan
+</code>
+Then when in the shell type:
+<code oobas>
+ o conf init
+</code>
+<note>to reconfigure CPAN, replace all */root/.cpan/* with  /home/$username/.cpan/*</note>
+change the makepl_arg so it should look like.
+<code bash | /home/$username/.cpan/CPAN/MyConfig.pm>
+ 'makepl_arg' => q[INSTALLDIRS=site PREFIX=/home/$username/perl/],
+</code>
+Finally the env variable PERL5LIB needs to point to the new module installation paths:
+<code oobas>
+ export PERL5LIB="/home/$username/perl/share/perl/custom_lib/:/home/$username/perl/lib/perl/custom_lib/";
+</code>
+and then you should be able to use CPAN to install modules.
+I then modified following file
+<code bash | ~/.bashrc>
+export PERL_LOCAL_LIB_ROOT="/home/$username/perl";
+export PERL_MB_OPT="--install_base /home/$username/perl";
+export PERL_MM_OPT="INSTALL_BASE=/home/$username/perl";
+export PERL5LIB="/home/$username/perl/share/perl/custom_lib/:/home/$username/perl/lib/perl/custom_lib/";
+export PATH="/home/$username/perl/bin:$PATH";
+</code>