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=item B<noupgrades>* - a list of package names to not upgrade

=item B<noextracts>* - a list of package names to not extract

=item B<assumeinstalled>* - a list of dependencies to assume are satisfied.
The setter methods take either a dependency hash or a string representing
a dependency.  The accessor returns a list of dependency hash references.

=item B<ignorepkgs>* - a list of package names to ignore for upgrade

=item B<ignoregroups>* - a list of groups to ignore for upgrade

=item B<usesyslog> - if true, log to the system log as well

=item B<deltaratio> - accepts a decimal from 0 to 1

=item B<checkspace> - check for available diskspace

=item B<defsiglvl> - the default signature level. See L</Signature Level>.
This name was shortened from I<alpm_option_set_default_signature_level>.
You're welcome.

=back

=head2 Read-only options

=over

=item B<root> - path to the installation root

=item B<dbpath> - path to the database

=item B<lockfile> - path to the lockfile

=back

  * = the option is set with (and gets you) a list

=head2 Callback options

Callbacks can only be set to code references.

=head3 logcb - Generic logging

The log level and message are passed to the provided code ref as
arguments.

=over 4

=item 1. level

This is one of the following strings: error, warning, debug, function, or unknown.

=item 2. message

This is the message itself.

=back

=head1 DATA TYPES

Several libalpm data types have been converted into hash references. The
alternative is to turn them into full-blown objects, which seems pointless
considering the only methods are data accessors.

=head2 Dependency

Dependencies specify constraints on a set of packages. Only certain packages
satisfy a dependency. These can be used in places other than dependencies,
such as conflicts. Dependencies have the following keys:

=over 4

=item name

The name of a package.

=item version

A version string, which can be empty.

=item mod

A boolean operator used to compare package versions to our dependency
version, must be either an empty string (which allows any version), =, >=,
<=, >, <, or ? if an internal error occurred.

=item desc

If the dependency is optional this key gives a description of the dependency. This key does not exist on a regular dependency.

=back

=head2 Conflict

Conflicts have the following keys:

=over 4

=item package1

An L<ALPM::Package> object.

=item package2

An L<ALPM::Package> object.

=item reason

A hashref that is identical to a dependency. See L</Dependency>.

=back

=head2 Signature Level

Signature levels describe the level of security which is required for packages files
and by databases files. Different degrees of signature checking can be used for
either type of file. The signature checking is performed after the file is downloaded
in order to verify the original packager. B<When gpg is not available an invalid argument
error will be raised from libalpm if you try to set the siglevel.>