Re: Getting the name of file-like objects

[Liliana Marie Prikler <liliana.prikler@gmail.com>]

Hi Justin

Am Freitag, dem 01.04.2022 um 16:29 -0400 schrieb Justin Veilleux:
>  Hi everyone. I'm currently writing a set of helper functions
> (usually written using `computed-file`  which act on file like
> objects to transform them in some way.
> For instance, I have a `decompress` function which, given a file-like
> object pointing to an archive, will return a computed file object
> which it will decompress to it's output.
>  Everything works very well, but I would like to be able to name the
> `computed-file` objects something meaningfull.
> ```
> (define (unzip f)
>   (computed-file (string-append (name f) "-unzipped")
>     #~(begin
>         (system* (string-append #$unzip "/bin/unzip")
>                  "-d" #$output
>                  #$file))
>          #$out))
> ```
> Is there someting which ressembles the imaginary `name` function I
> used above?
Generally speaking, you'll have to speak to the store to achieve your
goal.  For a specific implementation, that fetches a file from a
package (without building the package in question!), see package-file
in (guix packages).

Cheers