NAME
    File::Copy::Undoable - Copy file/directory using rsync, with undo
    support

VERSION
    version 0.04

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

AUTHOR
    Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2013 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.

DESCRIPTION
FUNCTIONS
    None are exported by default, but they are exportable.

  cp(%args) -> [status, msg, result, meta]
    On do, will copy "source" to "target" (which must not exist beforehand).
    On undo, will trash "target".

    Fixed state: "source" exists 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.

    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 can add, for example, "--delete" or
        other rsync options.

    *   source* => *str*

    *   target* => *str*

        Target location.

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

    *   target_group => *str*

        Set group of target.

        See "target_owner".

    *   target_owner => *str*

        Set ownership of target.

        If set, will do a "chmod -Rh" on the target after rsync to set
        ownership. This usually requires super-user privileges. An example
        of this is copying files on behalf of user from a source that is
        inaccessible by the user (e.g. a system backup location). Or,
        setting up user's home directory when creating a user.

        Will do nothing if not running as super-user.

    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.