[texworks] external read-access causes TeXWorks to revert open file to old version

[Paul A Norman]

Thanks that clears a lot up Stefan.

Unless the same thing happens using another text editor - it is
outside of my experience area sorry.

Paul

On 26 October 2010 21:16, Stefan Müller <warrence.stm at gmx.de> wrote:
> Hi Paul,
>
> On 26.10.2010 02:12, Paul A Norman wrote:
>>
>> Stefan,
>>
>> Just to clarify from your earlier postings, you said that you have two
>> boxes, an Xp and a Linux box?
>>
>> 1. Was this happening under both Os-es please? I'm still thinking of
>> caching issues here.
>
> It happens under both Os-es. I'm using v0.3 r606 on Windows and v0.3 r670
> (with those extra debug lines from on of the previous mails) on Linux.
>
>> 2. And have you tried exactly the same procedures of what you call a
>> "Positive run", not using TeXworks but instead a very simple text
>> editor (preferably a GUI one).
>
> No, I haven't tried that. Mostly because I don't know any other nice TeX
> editor for Linux. I could try to reproduce a "positive run" with Scite. I'll
> report back soon about this.
>
>> 3. Otherwise ... apparently there are two versions of TortoiseHG and
>> one of them is a Qt version -can you determine which one you are on?
>> ...
>
> In the TortoiseHG info is something written about "Python, PyGTK, GTK", so I
> suppose I'm not using the Qt version. I didn't know there was one.
>
> Stefan
>
>> Thoughts ...
>>
>> A. (i)(Starting to wonder if it is an intermittent Qt file handling
>> issue - does Qt use any memory caching in opening and accessing and
>> prior to commit to disk? Or build a virtual drive in Ram  for
>> temporary staging (same thing practically I suppose)?
>>     (ii) If so, is there an explicit flush/clear that needs to be called?
>>     (iii) Is TortoiseHG Qt version accessing this same memory file
>> caching area (wouldn't
>>          that trigger some sort of a violation error message though or
>> does Qt leave a door
>>          open  for that between Qt applications?)?
>>
>> Paul
>>
>> On 26 October 2010 09:36, Stefan Müller<warrence.stm at gmx.de>  wrote:
>>>
>>> Another thing I just recognized: In a "positive run" (i.e. where the
>>> problem
>>> occurs) TW prints (beside others) the following debug messages:
>>>
>>> Loading: "/dir/to/my/file.tex"
>>> Loading: "/dir/to/my"
>>> ...
>>> Loading: "/dir/to/my"
>>> Changed: "/dir/to/my/file.tex"
>>> Loading: "/dir/to/my/file.tex"
>>>
>>> Is it correct, that sometimes the directory and sometimes the file is
>>> loaded?
>>>
>>> Stefan
>>>
>>>
>>> On 25.10.2010 19:19, Stefan Müller wrote:
>>>>
>>>> Hi,
>>>>
>>>> it has been a while since the last reply, but I was only now able to
>>>> test again on my Linux machine with those debug messages you gave me (I
>>>> didn't compile it for Windows).
>>>>
>>>> So, still strange things that happen. (Sometimes) When I change
>>>> something in the open tex file in TW, save and commit this change with
>>>> TortoiseHG (my Mercurial client), the debug messages say that the open
>>>> tex file has changed and that the same file is loaded (again). Then TW
>>>> displays an older version of the tex file. To get my current file back I
>>>> have to reopen TW.
>>>>
>>>> So there are basically two possiblities I can think of.
>>>> (1) TW has a problem with TortoiseHG accessing the tex file and
>>>> "restores" an old version of the file. What goes wrong? Where does the
>>>> old file come from?
>>>> (2) TortoiseHG messes with the tex file causing TW to reload it. Why
>>>> should TortoiseHG write on the file? And if TortoiseHG temporarily
>>>> writes to the tex file, why doesn't TW reloads again when TortoiseHG
>>>> restores the current (committed) version?
>>>>
>>>> Hopefully someone has an idea what's causing the problem or how it could
>>>> be fixed, especially if it's (1). Thanks in advance.
>>>>
>>>> Best regards,
>>>> Stefan
>>>>
>>>> On 22.09.2010 18:07, Stefan Löffler wrote:
>>>>>
>>>>> Am 2010-09-22 17:49, schrieb Stefan Müller:
>>>>>>>
>>>>>>> Anyway, if you build Tw yourself, you could add the following to
>>>>>>> lines
>>>>>>> (linenumber where to add in brackets) to get some debugging
>>>>>>> information:
>>>>>>> [959] qDebug()<<  "Loading:"<<  fileName;
>>>>>>> [1094] qDebug()<<  "Changed:"<<  curFile;
>>>>>>> This should print the filenames Tw loads, and whenever it detects a
>>>>>>> change to the filename on the harddisk.
>>>>>>
>>>>>> Maybe that's not clever to ask, but in which file should I put those
>>>>>> lines? I
>>>>>> looked into TWApp.cpp, but it looks wrong there...
>>>>>
>>>>> Oops, sorry. In src/TeXDocument.cpp.
>>>>>
>>>>> Stefan
>>>>
>>>
>>
>>
>