use lib LIST;
no lib LIST;
It is typically used to add extra directories to perl's search path so that later use or require statements will find modules which are not located on perl's default search path.
use lib
are added to the start of the perl search path. Saying
use lib LIST;
is almost the same as saying
BEGIN { unshift(@INC, LIST) }
For each directory in
LIST (called $dir
here) the lib module
also checks to see if a directory called $dir/$archname/auto exists. If so
the $dir/$archname directory is assumed to be a corresponding architecture
specific directory and is added to @INC in front
of $dir.
If
LIST includes both $dir
and
$dir/$archname then $dir/$archname will be added to @INC twice (if $dir/$archname/auto exists).
By default the no lib
statement deletes the first instance of each named directory from
@INC. To delete multiple instances of the same name
from @INC you can specify the name multiple times.
To delete all instances of all the specified names from @INC you can specify
':ALL' as the first parameter of no lib
. For example:
no lib qw(:ALL .);
For each directory in
LIST (called $dir
here) the lib module also checks to see if a directory called $dir/$archname/auto exists. If so the $dir/$archname directory is assumed to be a corresponding architecture specific directory and is also deleted from
@INC.
If
LIST includes both $dir
and
$dir/$archname then $dir/$archname will be deleted from @INC twice (if $dir/$archname/auto exists).
@lib::ORIG_INC
. To restore @INC to that value you can say
@INC = @lib::ORIG_INC;