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DEFINING AN EXPLICIT SYSTEM PLUMBER IN POSIX SHELL

Mon Apr 10 14:09:28 PDT 2023

The computing environments I prefer are minimal. Minimal window managers, and CLI oriented programs are my preference. This being the case, I am not a fan of xdg-open. This may be because I dont fully understand it, or because I feel it is overly complex. Whatever the reason, I prefer a plumber which is explicity defined, in a language I can understand.

The Noice terminal file manager relies on a separate opener for plumbing called 'nopen'. File types, and what those file types are opened with is explicitly defined. I find this appealing. The same kind of opener can be created using posix shell with a case statement:

   case $1 in							 
       *.mp4|*.mkv|*.webm|*.mov|*.m3u)				 
           mpv "$1"						 
       ;;								 
    								 
       *.ogg|*.mp3|*.pls*|*.opus|*.aiff|*.aif|*.flac)		 
           mpv --no-video "$1"					 
       ;;								 
    								 
       *.png|*.gif|*.jpg|*.jpe|*.jpeg|*.webp)			 
           nsxiv "$1"						 
       ;;								 
    								 
       *.html|*.htm)						 
           w3m "$1"						 
       ;;								 
                                                                   
       *.pdf|*.epub|*.cbz|*.djvu)					 
		       zathura "$1"				        		  
       ;;								  
    								 
       *.md)							 
   	       lowdown -Tterm "$1" | less		        		  
       ;;								 
    								 
       # all other files						 
       *)								 
           "${EDITOR:=vi}" "$1"					 
       ;;								 
   esac								 

I use this opener for almost everything now, and added it to my

system in the following ways:

In ~/bin/openr.sh

Added to my ~/.kshrc as:

     openr(){							 
       "the above case statement"				 
     }								 

map o $openr $f

cmd openr $/home/atyh/bin/openr.sh $f

OPENER=/home/atyh/bin/openr.sh

With the opener(plumber) defined in these 4 locations, I am able to

use it to great effect. The power in this lies in the ability to

define shell commands for specific file types. The *.md) section for

example takes advantage of lowdown(1)'s ability to format markdown

documents into terminal formated output. With this, in lf, I can

push 'o' and lf will open a README.md in a git repo in a nice color

formated and readable way in less(1).

This is really just scratching the surface with what can be done

with this plumbing method.

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