On Tue, 27 Sep 2022, 15:45 John H Palmieri, <jhpalmier...@gmail.com> wrote:
> One of the issues is that code in Sage is using this temporary directory
> in the background; the user is not doing it and has no control over it.
> Regardless of the context manager approach, apparently some browsers refuse
> to open local files that are not in the user's home directory, so this
> location just won't work for them.
>
tempfile.TemporaryDirectory(*suffix=None*, *prefix=None*, *dir=None*,
*ignore_cleanup_errors=False*)
dir= may be used to set a directory to place
the created one in.
>
> On Tuesday, September 27, 2022 at 2:22:47 AM UTC-7 dim...@gmail.com wrote:
>
>> On Tue, Sep 27, 2022 at 3:58 AM Andrey Novoseltsev <novo...@gmail.com>
>> wrote:
>> >
>> > Hello!
>> >
>> > I've run into this while testing upgrades to Ubuntu 22.04 from 20.04,
>> but it seems that it comes from how temporary files are handled in Sage
>> 9.7:
>> >
>> > TMP_DIR_FILENAME_BASE=tempfile.TemporaryDirectory()
>> >
>> > this temporary directory is created and then used ever after. But what
>> if it gets deleted?
>> I think it's meant to be used in a context manager, i.e. with with
>> statement, e.g., citing python docs:
>>
>> >>> with tempfile.TemporaryDirectory() as tmpdirname:
>> ... print('created temporary directory', tmpdirname)
>> >>>
>> # directory and contents have been removed
>>
>> Or with a callback (from Sage source)
>>
>> TMP_DIR_FILENAME_BASE=tempfile.TemporaryDirectory()
>> atexit.register(lambda: TMP_DIR_FILENAME_BASE.cleanup())
>>
>>
>> Needless to say, one can interfere with it in a bad way messing around
>> with ~/.sage/ - but so it the case for any file-based process...
>>
>>
>>
>> For example, what if someone uses tmpreaper or something similar,
>> when old files are removed from /tmp? Sage does not notice it, but
>> things break in a weird way, e.g. plots are not displayed and the
>> error message is not transparent.
>> >
>> > I believe this is exactly what is happening and I would appreciate some
>> attention to this matter ;-)
>> >
>> > Thank you!
>> > Andrey
>> >
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>>
>>
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