Add new class "cachedproperty" for creating property-like attributes
that cache the return value of a method call.
Also fix few issues in the unit tests to enable them to succeed.
ticket 1959
There are two reasons for the plugin framework:
1. To provide a way of doing manual/complex LDAP changes without having
to keep extending ldapupdate.py (like we did with managed entries).
2. Allows for better control of restarts.
There are two types of plugins, preop and postop. A preop plugin runs
before any file-based updates are loaded. A postop plugin runs after
all file-based updates are applied.
A preop plugin may update LDAP directly or craft update entries to be
applied with the file-based updates.
Either a preop or postop plugin may attempt to restart the dirsrv instance.
The instance is only restartable if ipa-ldap-updater is being executed
as root. A warning is printed if a restart is requested for a non-root
user.
Plugins are not executed by default. This is so we can use ldapupdate
to apply simple updates in commands like ipa-nis-manage.
https://fedorahosted.org/freeipa/ticket/1789https://fedorahosted.org/freeipa/ticket/1790https://fedorahosted.org/freeipa/ticket/2032
We have a larger goal of replacing all DN creation via string
formatting/concatenation with DN object operations because string
operations are not a safe way to form a DN nor to compare a DN. This
work needs to be broken into smaller chunks for easier review and
testing.
Addressing the unit tests first makes sense because we don't want to
be modifying both the core code and the tests used to verify the core
code simultaneously. If we modify the unittests first with existing
core code and no regressions are found then we can move on to
modifying parts of the core code with the belief the unittests can
validate the changes in the core code. Also by doing the unittests
first we also help to validate the DN objects are working correctly
(although they do have an extensive unittest).
The fundamental changes are:
* replace string substitution & concatenation with DN object
constructor
* when comparing dn's the comparision is done after promotion
to a DN object, then two DN objects are compared
* when a list of string dn's are to be compared a new list is
formed where each string dn is replaced by a DN object
* because the unittest framework accepts a complex data structure of
expected values where dn's are represeted as strings the unittest
needs to express the expected value of a dn as a callable object
(e.g. a lambda expression) which promotes the dn string to a DN
object in order to do the comparision.
The changes include:
* Change license blobs in source files to mention GPLv3+ not GPLv2 only
* Add GPLv3+ license text
* Package COPYING not LICENSE as the license blobs (even the old ones)
mention COPYING specifically, it is also more common, I think
https://fedorahosted.org/freeipa/ticket/239
Fix a logic problem in ldap2:get_schema() for determining if it
can fetch the schema or not. Normally we only want to do this for servers
but if you pass in your own connection it will use that.
