Austin Adams

Opening .circ files in Brandonsim

August 22, 2017

Sometimes you gotta have pretty icons and pretty buttons, y’know? In the case of Brandonsim on GNU/Linux, specifically to give it and .circ files pretty icons which open Brandonsim when clicked, do one of the following:

Option 1: Use a Script

Download Brandonsim-X.Y.Z.jar from T-Square, put it somewhere permanent (moving it will break the files the script creates), and run the following command:

curl -Ls | bash

After the script completes, log out and log back in, just in case.

Option 2: By Hand

If you don’t like piping random shell scripts from the internet into a shell, you can do the following instead:

  1. Run mkdir -p ~/.local/share/applications/ ~/.local/share/mime/packages/

  2. Install icons stolen from Brandon’s Brandonsim repo by running:

     tmpfile=$(mktemp --suffix=.png); for size in 16 20 24 48 64 128; do curl -L$size.png -o "$tmpfile" && xdg-icon-resource install --size $size "$tmpfile" brandonsim-icon; done; rm "$tmpfile"
  3. Create ~/.local/share/mime/packages/brandonsim.xml with the following contents:

     <?xml version="1.0" encoding="UTF-8"?>
     <mime-info xmlns=''>
       <mime-type type="application/brandonsim">
         <comment>Brandonsim circuit</comment>
         <glob pattern="*.circ"/>
         <icon name="brandonsim-icon"/>
  4. Run update-mime-database ~/.local/share/mime

  5. Create ~/.local/share/applications/brandonsim.desktop with the following contents, except with your path to the Brandonsim jar instead of /PATH/TO/YOUR/Brandonsim-2.7.4.jar:

     [Desktop Entry]
     GenericName=Logic circuit simulator
     Comment=Digital logic circuit simulator
     Exec=java -jar /PATH/TO/YOUR/Brandonsim-2.7.4.jar %U
  6. Run xdg-mime default brandonsim.desktop application/brandonsim

Might need to log out and log back in somewhere in there, YMMV. Just restarting gnome-shell at the end worked for me.