Re: How to do a massive unfill paragraph operation over several hundred files?

[Robert Pluim]

Gerald Wildgruber <wildgruber@tu-berlin.de> writes:

> On Mo, Okt 01 2018, Emanuel Berg <moasen@zoho.com> wrote:
>
>> Gerald Wildgruber wrote:
>>
>>> But how can I use the unfill-paragraph
>>> function programmatically (non-interactively)
>>> in a script
>>
>> (unfill-paragraph ARGS)
>
> Yes, that is the whole point I didn't understand! What does "ARGS" have to be 
> when called non-interactively in a script. From the doc string of the 
> function:
>
> (defun unfill-paragraph (&optional region)
>   "Takes a multi-line paragraph and makes it into a single line of text."
>   (interactive (progn (barf-if-buffer-read-only) '(t)))
>   (let ((fill-column (point-max)))
>     (fill-paragraph nil region)))

Itʼs optional, which means it will be 'nil' if you donʼt specify it,
which means (from the docsting of 'fill-paragraph')

    The REGION argument is non-nil if called interactively; in that
    case, if Transient Mark mode is enabled and the mark is active,
    call `fill-region' to fill each of the paragraphs in the active
    region, instead of just filling the current paragraph.

So 'nil' just means 'fill the current paragraph'. It might work for
you if you mark the whole buffer, and call

(unfill-paragraph t)

instead, since that should take care of iterating over all the
paragraphs (untested).

Robert