Re: [Gnu-arch-users] [BUG] FEATURE PLANS: summary revlibs

[Bug Goo]

Created as bug 147

On Sat May 29 05:12:13 2004, Tom Lord wrote:
> 
> We currently have --greedy and --sparse revlibs.
> 
> "greedy" should not be a boolean ("greedy or not greedy") 
> but should be part of a set of options including at least:
> 
>         passive     (== the current not greedy)
>         greedy      (== the current greedy)
>         summary     (new)
> 
> In a summary library, if REV has a patch log entry that
> contains the header 
> 
>         Summary-basis: REV
> 
> (naming itself as a basis), then it is a _permanent_addition_ to the
> revlib.  It will be greedily added and can only be deleted by hand
> (using `library-remove').
> 
> If a revision in a summary revlib is not permanent, it's sliding.
> 
> When a new sliding revision is needed in a library, the
> already-present nearest neighbor revisions are checked.   Either of
> them that is not permanent and that can be locked and that has an 
> identical "Summary-basis:" can be removed from the library and
> converted into the newly desired revision.
> 
> Suppose that know sliding revision exists which can be turned into our 
> desired revision.  In that case, 
> 
>         0) If the basis revision exists in the library, link to that
>            and build by applying at most two changesets.
> 
>         1) Otherwise, if the library is --sparse, recursively try to
>            build the BASIS revision as a temp directory and 
>            patch against that.
> 
>         2) Otherwise, (missing basis, not --sparse), recursively
>            add the basis to the library and goto step 0.
> 
> 
> (Note that the intention here is to encourage people to make a summary
> revlib for summary versions.)
> 
> 
> -t
> 
> 
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