Angela Schreiber created SLING-11160:
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             Summary: Repoinit does not allow to remove individual ACEs
                 Key: SLING-11160
                 URL: https://issues.apache.org/jira/browse/SLING-11160
             Project: Sling
          Issue Type: Bug
          Components: Repoinit
            Reporter: Angela Schreiber


With SLING-9090 support for using _REMOVE *_ for all entries at a given path or 
for a given principal has been implemented.

However as indicated in the same issue the intended usage of _REMOVE 
some-thing-specific_ is not clear.

What is therefore missing repo-init is the ability to remove a single access 
control entry that matches 
- prinicipal
- privileges
- allow-status
- single value restriction
- mv restrictions.

As far as I can see the biggest issue is the fact that REMOVE vs ALLOW/DENY are 
mutually exclusive as the other params listed above can be extracted from a 
given AclLine in combination with the set-ACL statement.

This could be fixed by adjusting the following parser method
{code}
AclLine privilegesLineOperation() :
{}
{
    ( 
        <REMOVE>        { return new AclLine(AclLine.Action.REMOVE); }
        | ( <ALLOW>     { return new AclLine(AclLine.Action.ALLOW); } )
        | ( <DENY>      { return new AclLine(AclLine.Action.DENY); } )    
    ) 
}
{code}

such that
- REMOVE is optional, followed by 
- ALLOW or DENY

The  {{AclLine}} would then need to be slightly adjusted such that REMOVE can 
be combined with either ALLOW or DENY.

Otherwise, I don't see how 
{{AccessControlList.removeAccessControlEntry(AccessControlEntry)}} could be 
implemented in org.apache.sling.jcr.repoinit for a single ACE.

Or maybe the intention was something different in the first place?
[~bdelacretaz], I would appreciate if you had time to comment on this.

cc: [~kpauls], [~cziegeler]




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