Re: [Tailor] changeset 1499: Reduce "rename A B"+"add B" to "add B"

[Lele Gaifax]

On Mon, 19 May 2008 10:49:45 +0200
Walter Franzini <[EMAIL PROTECTED]> wrote:

> The transformation implemented in change-set 1499 looks suspicious to
> me,
> 
> Why the reduction is not "delete A + add B"?

Because it's not what it seems: if you look at the test case, you can
see that it's rather a problematic patch *representation*, due to a
bug in darcs (I think... already fixed [we are talking about ancient
patches]):

    <summary>
    <move from="Autoconf.lhs" to="Autoconf.lhs.in"/>
    <add_file>
    Autoconf.lhs.in
    </add_file>
    ...
    </summary>

what may have happened here is:

    $ darcs add Autoconf.lhs
    # ... programmer thinks, then changes his mind ...
    $ darcs mv Autoconf.lhs Autoconf.lhs.in
    # ...
    $ darcs record

which nowadays produces:

    $ cd /tmp/
    $ mkdir p
    $ cd p
    $ darcs init
    $ touch Autoconf.lhs
    $ darcs add Autoconf.lhs
    $ darcs mv Autoconf.lhs Autoconf.lhs.in
    $ darcs rec -a -m "Add then move"
    Finished recording patch 'Add then move'
    $ darcs cha -s --xml
    <changelog>
    <patch author='[EMAIL PROTECTED]' date='20080519091835' local_date='Mon May 
19 11:18:35 CEST 2008' inverted='False' 
hash='20080519091835-97f81-ad02527dd5ecbea5c10de4c5eaeb5ef4e3da4d09.gz'>
            <name>Add then move</name>
        <summary>
        <add_file>
        Autoconf.lhs.in
        </add_file>
        </summary>
    </patch>
    </changelog>

Thanks a lot for reviewing!-)

ciao, lele.
-- 
nickname: Lele Gaifax    | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas    | comincerò ad aver paura di chi mi copia.
[EMAIL PROTECTED] |                 -- Fortunato Depero, 1929.
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