Re: How to convert an arbitrary string into a filename

[Platon Pronko <platon7pronko@gmail.com>]

On 2023-04-26 12:42, Marcin Borkowski wrote:
> 
> On 2023-04-26, at 06:03, Platon Pronko <platon7pronko@gmail.com> wrote:
> 
>> On 2023-04-26 11:55, Marcin Borkowski wrote:
>>> Hi all,
>>> given an arbitrary string, say "Hello, world!!!", I want to have
>>> a filename with all the runs of weird characters (that is,
>>> non-alphanumeric ones) converted to dashes (say, "Hello-world").  Is
>>> there a function for that in Emacs already or should I write my own?
>>
>> Something like this?
>>
>> (let ((input "Hello, world!!!"))
>>    (replace-regexp-in-string "[^a-zA-Z0-9]+" "-" input))
>> ;; "Hello-world-"
> 
> More or less, possibly with trimming - I know it's simple, I just didn't
> want to do it if it already exists.  Which I still don't know...  (I
> suppose not, but I'm not sure.)

The term you are looking for is "slug" ("slugify").

Quick google search indicates that there's nothing built-in, but there might be some implementations inside other packages. Here's a reference to an implementation in org-roam package: https://mailb.org/pipermail/emacs-berlin/2022/000897.html

Also might be of interest:
https://github.com/masasam/emacs-easy-hugo/issues/64
https://melpa.org/#/unidecode