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20 May 2018 17:33:51 UTC
- Distribution: File-pushd
- Module version: 1.016
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Bus factor: 1- 92.03% Coverage
- License: apache_2_0
- Perl: v5.6.0
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- NAME
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- SYNOPSIS
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- USAGE
- DIAGNOSTICS
- SEE ALSO
- SUPPORT
- AUTHOR
- CONTRIBUTORS
- COPYRIGHT AND LICENSE
NAME
File::pushd - change directory temporarily for a limited scope
VERSION
version 1.016
SYNOPSIS
use File::pushd; chdir $ENV{HOME}; # change directory again for a limited scope { my $dir = pushd( '/tmp' ); # working directory changed to /tmp } # working directory has reverted to $ENV{HOME} # tempd() is equivalent to pushd( File::Temp::tempdir ) { my $dir = tempd(); } # object stringifies naturally as an absolute path { my $dir = pushd( '/tmp' ); my $filename = File::Spec->catfile( $dir, "somefile.txt" ); # gives /tmp/somefile.txt }
DESCRIPTION
File::pushd does a temporary
chdir
that is easily and automatically reverted, similar topushd
in some Unix command shells. It works by creating an object that caches the original working directory. When the object is destroyed, the destructor callschdir
to revert to the original working directory. By storing the object in a lexical variable with a limited scope, this happens automatically at the end of the scope.This is very handy when working with temporary directories for tasks like testing; a function is provided to streamline getting a temporary directory from File::Temp.
For convenience, the object stringifies as the canonical form of the absolute pathname of the directory entered.
Warning: if you create multiple
pushd
objects in the same lexical scope, their destruction order is not guaranteed and you might not wind up in the directory you expect.USAGE
use File::pushd;
Using File::pushd automatically imports the
pushd
andtempd
functions.pushd
{ my $dir = pushd( $target_directory ); }
Caches the current working directory, calls
chdir
to change to the target directory, and returns a File::pushd object. When the object is destroyed, the working directory reverts to the original directory.The provided target directory can be a relative or absolute path. If called with no arguments, it uses the current directory as its target and returns to the current directory when the object is destroyed.
If the target directory does not exist or if the directory change fails for some reason,
pushd
will die with an error message.Can be given a hashref as an optional second argument. The only supported option is
untaint_pattern
, which is used to untaint file paths involved. It defaults to {qr{^("" in -+@\w.+)$}}, which is reasonably restrictive (e.g. it does not even allow spaces in the path). Change this to suit your circumstances and security needs if running under taint mode. *Note*: you must include the parentheses in the pattern to capture the untainted portion of the path.tempd
{ my $dir = tempd(); }
This function is like
pushd
but automatically creates and callschdir
to a temporary directory created by File::Temp. Unlike normal File::Temp cleanup which happens at the end of the program, this temporary directory is removed when the object is destroyed. (But also seepreserve
.) A warning will be issued if the directory cannot be removed.As with
pushd
,tempd
will die ifchdir
fails.It may be given a single options hash that will be passed internally to
pushd
.preserve
{ my $dir = tempd(); $dir->preserve; # mark to preserve at end of scope $dir->preserve(0); # mark to delete at end of scope }
Controls whether a temporary directory will be cleaned up when the object is destroyed. With no arguments,
preserve
sets the directory to be preserved. With an argument, the directory will be preserved if the argument is true, or marked for cleanup if the argument is false. Onlytempd
objects may be marked for cleanup. (Target directories topushd
are always preserved.)preserve
returns true if the directory will be preserved, and false otherwise.DIAGNOSTICS
pushd
andtempd
warn with message"Useless use of File::pushd::%s in void context"
if called in void context and the warnings categoryvoid
is enabled.{ use warnings 'void'; pushd(); }
SEE ALSO
SUPPORT
Bugs / Feature Requests
Please report any bugs or feature requests through the issue tracker at https://github.com/dagolden/File-pushd/issues. You will be notified automatically of any progress on your issue.
Source Code
This is open source software. The code repository is available for public review and contribution under the terms of the license.
https://github.com/dagolden/File-pushd
git clone https://github.com/dagolden/File-pushd.git
AUTHOR
David Golden <dagolden@cpan.org>
CONTRIBUTORS
Diab Jerius <djerius@cfa.harvard.edu>
Graham Ollis <plicease@cpan.org>
Olivier Mengué <dolmen@cpan.org>
Shoichi Kaji <skaji@cpan.org>
COPYRIGHT AND LICENSE
This software is Copyright (c) 2018 by David A Golden.
This is free software, licensed under:
The Apache License, Version 2.0, January 2004
Module Install Instructions
To install File::pushd, copy and paste the appropriate command in to your terminal.
cpanm File::pushd
perl -MCPAN -e shell install File::pushd
For more information on module installation, please visit the detailed CPAN module installation guide.