We need some sort of meta-bug 'This bug depends on'
capability. The main use of this is for tracking
purposes; e.g we can make a "make zope go faster"
tracking bug, and list related bugs as dependencies on it.

This is a facility that bugzilla has and uses to good
effect. Stories about its usefulness or annoyances
would be appreciated.

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What are the supposed semantics of such a feature that can't
be covered by a simple multilink attribute 'dependencies',
and some detectors ?

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You are correct, and I've got this down as an example in the TODO. 
There's display issues (for example, displaying the dependency tree) 
which can't be handled with the current Roundup code, but should be 
possible with the new templating. 
 

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One of the major things that I can't see an easy way to do
right now is to give a simple view of the dependencies that
are still open/shut. Bugzilla shows these by marking ones that
are not open with strike - /strike pairs. 

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In my sysadmin tracker, I have groups, depends on and see also 
fields.

When these are viewed in index view, they present as 


    [issue#][tag] [title]

The tag shows the current status of 
the issue N for new, O for open etc. The drawback is that it only immediate 

dependencies, but it is serviceable.

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Well, I just finished getting the last few bugs removed
from grouping 
and wrote the detector for the depends on
functionality.

I have 
had 12 node tree built to do the testing.

The only major problem 
was trying to keep the tree layouts
straight in my head. Then again it is 
5:37 AM here and
I have been working on this since yesterday 
AM.

The display is really the crux of this ticket. At this point 
I
think we have a proof of concept of detectors that
work.

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You can use the following detector with any issue multilink.
Just change the dependson field references.

Hmm, I may not be able to upload. I'll submit
this and see if I can add a file on refresh.

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You can use the following detector with any issue multilink.
Just change the dependson field references.

Hmm, I may not be able to upload. I'll submit
this and see if I can add a file on refresh.

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This is easy enough to implement, and will be present in a 
number of third-party trackers that are starting to emerge.