Given a GitHub username and a month/date string, this will take your GitHub avatar and slather the
words OOO 'til <month/date>.
In other words:
| From this | To this |
|---|---|
 |
 |
You will need the dependencies outlined in node-canvas before using this tool.
Once that's done, run:
npm install -g ooo-maker
This assumes node is available in your PATH. If you're using a system where the node binary is named nodejs instead, you'll need to symlink it (or something).
ooo-maker -u <GitHub_username> -d <month/date>
This will place the modified avatar in the same folder where you ran this command.
I got tired of doing this myself.