[Moin-user] best way for script to update wiki page ?

[R.Bauer]

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Reimar

Thomas Arthur Oehser schrieb:
>> Hmmm...
>>
>> So, the flow in my utility should be:
>>
>> 1) Detect what the latest revision is, say, 23
>> 1) Read that latest revsion, (say, 23)
>> 2) Process it to generate desired revision, say, 24, in /tmp
>> 3) Try to mv the entry from /tmp to the data pages directory
>> 4) If that fails, then someone else updated it, try again from (1)
>>
>> Good?
> 
> Actually, I'll need to update FooBar/current and FooBar/edit-log
> and data/edit-log and data/event-log too, in addition to the
> FooBar/revisions/00000006 file...
> 
> I'm definitely uncertain as to how to do this atomically such that
> there is no possible conflict with the online wikiwiki instance.
> 
> Presumably, the consequences for messing up the logs would be far
> less than if "current" and/or "00000006" file were updated wrongly.
> 
> So, maybe,
> 
> 1) Detect what the latest revision is, say, 23
> 2) Read that latest revsion, (say, 23)
> 3) Process it to generate desired revision, say, 24, in /tmp
> 4) mv the entry from tmp to revisions _and_ update current
> 5) If that fails, then someone else updated it, try again from (1)
> 6) Append to the 2 edit-log files and update the event-log
> 
> My concern is how to do (4) atomically.
> 
> 
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