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bug#35129: Unsupported escape sequences for progress in shell

From: Michael Albinus
Subject: bug#35129: Unsupported escape sequences for progress in shell
Date: Mon, 08 Apr 2019 09:36:35 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Juri Linkov <address@hidden> writes:

Hi Juri,

>>> I'm not sure if we can provide min-value/max-value for
>>> make-progress-reporter.  If not, then it uses spinning/pulsing.
>>> It seems progress-reporter doesn't support arbitrary strings
>>> such as that come from underlying process like ^[7Progress: [ 0%]^[8
>> progress-reporter should be improved to accept also strings like "45%"
>> to be displayed literally.
> Another problem is that there is no clear moment to start/stop
> progress-reporter with calls to make-progress-reporter and
> progress-reporter-done.

At least for my use case, calling external p?scp commands in Tramp,
there is no problem. But in general you might be right.

>>> Could you show an example of a progress reporter from an external command.
>>> Do they use arbitrary strings?
>> Some scp or pscp versions do it. For example:
>> $ pscp -v localhost:/net/ford/Multimedia/Eigene\ 
>> Videos/Videos/20150829_145255.mp4 /tmp/foo
>> [...]
>> foo                       | 203369 kB | 5810.6 kB/s | ETA: 00:00:00 | 84%
> Progress on copying large files would be needed for local file operations
> as well.

Yes. But local copying is not implemented via external commands; this
needs another progress reporter call.

Best regards, Michael.

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