An exposure time calculator for (pinhole) cameras written in nim using the declarative adwaita UI framework owlkettle.

First you need nim, its package manager nimble as well as the gtk and adwaita dependencies:

dnf install nim nimble gtk4-devel libadwaita-devel

or:

apt install nim nimble libgtk-4-dev libadwaita-1-dev

Then install owlkettle via nimble (more details in the owlkettle repo):

nimble install owlkettle@#head

Once that is done, you build the app by running build.sh. You'll find the binary in the build directory.