POSIX group support
-------------------

                 Key: NXP-6430
                 URL: https://jira.nuxeo.com/browse/NXP-6430
             Project: Nuxeo Enterprise Platform
          Issue Type: New Feature
          Components: Directory
    Affects Versions: 5.4.0.1
            Reporter: François-Denis Gonthier


Hello, 

I have been asked to implement POSIX group support in Nuxeo. We use the RFC 
2307 schema [1]. This patchs only touches LDAPReference.java. It extends the 
staticAttribute option with a new boolean option called staticAttributeIsId 
where a true value indicates the content of the staticAttributeId field is the 
Id of an LDAP object instead of a DN.

<ldapReference field="members" 
               directory="userDirectory" 
               forceDnConsistencyCheck="false" 
               staticAttributeId="memberUid"
               staticAttributeIsId="true" />

The patch is mostly working on my side. I can view, add and remove users from 
groups, and add and remove groups from users. My current version of the patch 
is attached to this message and was pushed to a personnal Hg repository [2]. I 
have not submitted a bug report on this because I'm stumbling on an unrelated 
problem.

The POSIX group object doesn't support subGroups but Nuxeo seems to expect to 
find subGroups in a group definition. If I don't add a dummy reference such as 
this one, Nuxeo crashed in various ways, all related to the missing subGroups 
link.

<!-- This doesn't make sense but I need that to test the patch -->
<ldapReference field="subGroups"
               directory="groupDirectory"
               staticAttributeId="memberUid"
               forceDnConsistencyCheck="false"
               staticAttributeIsId="false" />

Is there are way to tell Nuxeo that the directory doesn't support subGroups, 
that may have escaped me? I can take a stab at implementing this feature but 
since it spans several module in Nuxeo, from views to document model, I would 
like to know if there isn't an easy way to do that first.


[1] http://www.ietf.org/rfc/rfc2307.txt
[2] https://bitbucket.org/fdgonthier/nuxeo-services-patches


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