NAME

File::Move::Undoable - Move file/directory using rename/rsync, with undo support

VERSION

version 0.01

FAQ

Why do you use rsync? Why not, say, File::Copy::Recursive?

With rsync, we can continue interrupted transfer. We need this ability for recovery. Also, rsync can handle hardlinks and preservation of ownership, something which File::Copy::Recursive currently does not do. And, being implemented in C, it might be faster when processing large files/trees.

SEE ALSO

Setup

Rinci::Transaction

DESCRIPTION

This module has Rinci metadata.

FUNCTIONS

None are exported by default, but they are exportable.

mv(%args) -> [status, msg, result, meta]

Move file/directory using rename/rsync, with undo support.

If moving to the same filesystem, will move using rename(). On undo will restore the old name.

If moving to a different filesystem, will copy to target using rsync and then trash source. On undo, will trash target and restore source from trash.

Fixed state: source does not exist and target exists. Content or sizes are not checked; only existence.

Fixable state: source exists and target doesn't exist.

Unfixable state: source does not exist, or both source and target exist (unless we are moving to a different filesystem, in which it means an interrupted transfer and thus fixable).

This function is idempotent (repeated invocations with same arguments has the same effect as single invocation). This function supports transactions.

Arguments ('*' denotes required arguments):

• rsync_opts => array (default: ["-a"])

  Rsync options.

  By default, -a is used. You should not use rsync options that modify or destroy source, like --remove-source-files as it will make recovery of interrupted move impossible.

• source* => str

• target* => str

  Target location.

  Note that to avoid ambiguity, you must specify full location instead of just directory name. For example: mv(source=>'/dir', target=>'/a') will move /dir to /a and mv(source=>'/dir', target=>'/a/dir') will move /dir to /a/dir.

Special arguments:

• -tx_action => str

  For more information on transaction, see Rinci::Transaction.

• -tx_action_id => str

  For more information on transaction, see Rinci::Transaction.

• -tx_recovery => str

  For more information on transaction, see Rinci::Transaction.

• -tx_rollback => str

  For more information on transaction, see Rinci::Transaction.

• -tx_v => str

  For more information on transaction, see Rinci::Transaction.

Return value:

Returns an enveloped result (an array). First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (result) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

AUTHOR

Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Steven Haryanto.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm File::Move::Undoable

perl -MCPAN -e shell
install File::Move::Undoable