feat(docs): add cheatsheet

README.md

@@ -1,4 +1,5 @@
 This flake uses the [files flake-parts module](https://flake.parts/options/files.html) to generate documentation.
 The list of generated files are:
+- [docs/cheatsheet.md](docs/cheatsheet.md)
 - [README.md](README.md)
 The option `text.<name> supports either a string or a submodule with attributes order and parts. The parts attribute can either be a string, which will get concatenated in the order laid out in `text.<name>.order`, or can itself have the attributes order and parts, in which case it will be evaluated recursively.

docs/cheatsheet.md

@@ -0,0 +1 @@
+`__curPos.file` will give the full evaluated path of the nix file it is called in. See [this issue](https://github.com/NixOS/nix/issues/5897#issuecomment-1012165198) for more information.

modules/docs/cheatsheet.nix

@@ -0,0 +1,17 @@
+{ lib, config, ... }:
+let
+  inherit (lib) concatStringsSep singleton;
+in
+{
+  text.cheatsheet = concatStringsSep "\n" [
+    "`__curPos.file` will give the full evaluated path of the nix file it is called in. See [this issue](https://github.com/NixOS/nix/issues/5897#issuecomment-1012165198) for more information."
+  ];
+  perSystem =
+    { pkgs, ... }:
+    {
+      files.files = singleton {
+        path_ = "docs/cheatsheet.md";
+        drv = pkgs.writeText "cheatsheet.md" config.text.cheatsheet;
+      };
+    };
+}