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ExtUtils::Install(3)   Perl Programmers	Reference Guide	  ExtUtils::Install(3)

       ExtUtils::Install - install files from here to there

	 use ExtUtils::Install;

	 install({ 'blib/lib' => 'some/install/dir' } );


	 pm_to_blib({ 'lib/Foo/' => 'blib/lib/Foo/'	});


       Handles the installing and uninstalling of perl modules,	scripts, man
       pages, etc...

       Both install() and uninstall() are specific to the way
       ExtUtils::MakeMaker handles the installation and	deinstallation of perl
       modules.	They are not designed as general purpose tools.

       On some operating systems such as Win32 installation may	not be
       possible	until after a reboot has occurred. This	can have varying
       consequences: removing an old DLL does not impact programs using	the
       new one,	but if a new DLL cannot	be installed properly until reboot
       then anything depending on it must wait.	The package variable


       is used to store	this status.

       If this variable	is true	then such an operation has occurred and
       anything	depending on this module cannot	proceed	until a	reboot has

       If this value is	defined	but false then such an operation has ocurred,
       but should not impact later operations.

	       # deprecated forms
	       install(\%from_to, $verbose, $dry_run, $uninstall_shadows,
			   $skip, $always_copy,	\%result);

	       # recommended form as of	1.47
		   from_to => \%from_to,
		   verbose => 1,
		   dry_run => 0,
		   uninstall_shadows =>	1,
		   skip	=> undef,
		   always_copy => 1,
		   result => \%install_results,

	   Copies each directory tree of %from_to to its corresponding value
	   preserving timestamps and permissions.

	   There are two keys with a special meaning in	the hash: "read" and
	   "write".  These contain packlist files.  After the copying is done,
	   install() will write	the list of target files to $from_to{write}.
	   If $from_to{read} is	given the contents of this file	will be	merged
	   into	the written file. The read and the written file	may be
	   identical, but on AFS it is quite likely that people	are installing
	   to a	different directory than the one where the files later appear.

	   If $verbose is true,	will print out each file removed.  Default is
	   false.  This	is "make install VERBINST=1". $verbose values going up
	   to 5	show increasingly more diagnostics output.

	   If $dry_run is true it will only print what it was going to do
	   without actually doing it.  Default is false.

	   If $uninstall_shadows is true any differing versions	throughout
	   @INC	will be	uninstalled.  This is "make install UNINST=1"

	   As of 1.37_02 install() supports the	use of a list of patterns to
	   filter out files that shouldn't be installed. If $skip is omitted
	   or undefined	then install will try to read the list from
	   INSTALL.SKIP	in the CWD. This file is a list	of regular expressions
	   and is just like the	MANIFEST.SKIP file used	by ExtUtils::Manifest.

	   A default site INSTALL.SKIP may be provided by setting then
	   environment variable	EU_INSTALL_SITE_SKIPFILE, this will only be
	   used	when there isn't a distribution	specific INSTALL.SKIP. If the
	   environment variable	EU_INSTALL_IGNORE_SKIP is true then no install
	   file	filtering will be performed.

	   If $skip is undefined then the skip file will be autodetected and
	   used	if it is found.	If $skip is a reference	to an array then it is
	   assumed the array contains the list of patterns, if $skip is	a true
	   non reference it is assumed to be the filename holding the list of
	   patterns, any other value of	$skip is taken to mean that no install
	   filtering should occur.

	   Changes As of Version 1.47

	   As of version 1.47 the following additions were made	to the install
	   interface.  Note that the new argument style	and use	of the %result
	   hash	is recommended.

	   The $always_copy parameter which when true causes files to be
	   updated regardless as to whether they have changed, if it is
	   defined but false then copies are made only if the files have
	   changed, if it is undefined then the	value of the environment
	   variable EU_INSTALL_ALWAYS_COPY is used as default.

	   The %result hash will be populated with the various keys/subhashes
	   reflecting the install. Currently these keys	and their structure

	       install		   => {	$target	   => $source },
	       install_fail	   => {	$target	   => $source },
	       install_unchanged   => {	$target	   => $source },

	       install_filtered	   => {	$source	   => $pattern },

	       uninstall	   => {	$uninstalled =>	$source	},
	       uninstall_fail	   => {	$uninstalled =>	$source	},

	   where $source is the	filespec of the	file being installed. $target
	   is where it is being	installed to, and $uninstalled is any shadow
	   file	that is	in @INC	or $ENV{PERL5LIB} or other standard locations,
	   and $pattern	is the pattern that caused a source file to be
	   skipped. In future more keys	will be	added, such as to show created
	   directories,	however	this requires changes in other modules and
	   must	therefore wait.

	   These keys will be populated	before any exceptions are thrown
	   should there	be an error.

	   Note	that all updates of the	%result	are additive, the hash will
	   not be cleared before use, thus allowing status results of many
	   installs to be easily aggregated.


	   If there is only one	argument and it	is a reference to an array
	   then	the array is assumed to	contain	a list of key-value pairs
	   specifying the options. In this case	the option "from_to" is
	   mandatory. This style means that you	do not have to supply a
	   cryptic list	of arguments and can use a self	documenting argument
	   list	that is	easier to understand.

	   This	is now the recommended interface to install().


	   If all actions were successful install will return a	hashref	of the
	   results as described	above for the $result parameter. If any	action
	   is a	failure	then install will die, therefore it is recommended to
	   pass	in the $result parameter instead of using the return value. If
	   the result parameter	is provided then the returned hashref will be
	   the passed in hashref.

       install_default DISCOURAGED

	   Calls install() with	arguments to copy a module from	blib/ to the
	   default site	installation location.

	   $fullext is the name	of the module converted	to a directory (ie.
	   Foo::Bar would be Foo/Bar).	If $fullext is not specified, it will
	   attempt to read it from @ARGV.

	   This	is primarily useful for	install	scripts.

	   NOTE	This function is not really useful because of the hard-coded
	   install location with no way	to control site	vs core	vs vendor
	   directories and the strange way in which the	module name is given.
	   Consider its	use discouraged.

	       uninstall($packlist_file, $verbose, $dont_execute);

	   Removes the files listed in a $packlist_file.

	   If $verbose is true,	will print out each file removed.  Default is

	   If $dont_execute is true it will only print what it was going to do
	   without actually doing it.  Default is false.

	       pm_to_blib(\%from_to, $autosplit_dir);
	       pm_to_blib(\%from_to, $autosplit_dir, $filter_cmd);

	   Copies each key of %from_to to its corresponding value efficiently.
	   If an $autosplit_dir	is provided, all .pm files will	be autosplit
	   into	it.  Any destination directories are created.

	   $filter_cmd is an optional shell command to run each	.pm file
	   through prior to splitting and copying.  Input is the contents of
	   the module, output the new module contents.

	   You can have	an environment variable	PERL_INSTALL_ROOT set which
	   will	be prepended as	a directory to each installed file (and

	   By default verbose output is	generated, setting the
	   PERL_INSTALL_QUIET environment variable will	silence	this output.

	   Will	be prepended to	each install path.

	   Will	prevent	the automatic use of INSTALL.SKIP as the install skip

	   If there is no INSTALL.SKIP file in the make	directory then this
	   value can be	used to	provide	a default.

	   If this environment variable	is true	then normal install processes
	   will	always overwrite older identical files during the install

	   Note	that the alias EU_ALWAYS_COPY will be supported	if
	   EU_INSTALL_ALWAYS_COPY is not defined until at least	the 1.50
	   release. Please ensure you use the correct EU_INSTALL_ALWAYS_COPY.

       Original	author lost in the mists of time.  Probably the	same as

       Production release currently maintained by demerphq "yves at",
       extensive changes by Michael G. Schwern.

       Send bug	reports	via  Please send your generated
       Makefile	along with your	report.

       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

       See <>

perl v5.28.3			  2021-03-01		  ExtUtils::Install(3)


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