This plugin for X Plane labels points of interest (POIs) on your scenery as you fly around. POIs are downloaded from OpenStreetMap automatically. These are the kinds of POIs the plugin labels:

• Mountains
• Rivers
• Population centers
• Airports

This plugin uses the SASL plugin framework. All of the logic is implemented in Lua. The Busted test-driven-development framework is used for testing.

To setup your development environment, be sure to install Lua 5.1 so you're developing and testing with the same version of Lua that LuaJIT uses in X Plane (v5.1 as of X Plane 11.41). You'll also need Busted for running tests and LuaCov for test coverage analysis. Here's how I did it on my Mac (note: I tried an approach with Homebrew but was unsuccessful).

1. Install hererocks: pip3 install hererocks . You'll need Python and Pip to install it.
2. Make a directory somewhere for your installation of Lua, Luarocks, etc. (hererocks gave me an error for directories with a space in the path).
3. In that directory, hererocks lua51 -l5.1 -rlatest to install Lua 5.1 with the latest luarocks.
4. Activate that installation (add the necessary paths to your shell) with source lua51/bin/activate. You should also source this command in your .bashrc or .zshrc so that the paths are active each time you login.
5. luarocks install busted
6. luarocks install luacov

cd data/modules/Custom\ Module
busted

Again, in the data/modules/Custom\ Module directory:

luacov
cat luacov.report.out | more