Merge d3fb14e436 into 546de7273f

Ci

.envrc

@@ -0,0 +1 @@
+use flake

.github/workflows/main.yml

@@ -0,0 +1,18 @@
+name: "Cache binaries"
+on:
+  pull_request:
+  push:
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v25
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v14
+        with:
+          name: suntheme
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix build --accept-flake-config
+      - run: nix develop --accept-flake-config

.gitignore

@@ -21,4 +21,5 @@ cabal.project.local
 cabal.project.local~
 .HTF/
 .ghc.environment.*
-result/
+result
+.direnv/

README.md

@@ -1,12 +1,14 @@
 # Suntheme
 
-runs a script on sunrise and sunset, written in pure haskell.
+Runs a script on sunrise and sunset, written in pure Haskell
+
+---
 
 You may be wondering how a program written in Haskell, the purely functional
-programming language, could possibly act on the real world by running a so-called "script".
+programming language, could possibly act on the real world by running a so-called "script."
 
 It's simple. We take in the entire World as an input to a pure function, the IO Monad.
-It then maps the original World to the changed World, with our desired IO actions carefully applied.
+It then maps the original World to a new (generated) World, with our desired IO actions carefully applied with mathematical precision.
 
 > From the second perspective, an IO action transforms the whole world. IO actions are actually pure, because they receive a unique world as an argument and then return the changed world.
 
@@ -14,13 +16,13 @@ See [this](https://lean-lang.org/functional_programming_in_lean/monads/io.html)
 
 ## Hacking on suntheme
 
-It's trivially easy to get started with suntheme development thanks to [Nix](https://nixos.org/), the purely functional package manager.
-Naturally, we leverage it as our primary package manager, for both Hackage packages and development tools like language servers and the like.
+It's trivial to get started with suntheme development thanks to [Nix](https://nixos.org/), the purely functional package manager.
+Naturally, we leverage it as our primary package manager, both for Hackage and development tools like language servers and the like.
 
-First, install Nix through your preferred avenue. If unsure, we recommend [the Determinate Nix Installer](https://github.com/DeterminateSystems/nix-installer).
+First, install Nix through your preferred avenue or local system administrator. If unsure, we recommend [the Determinate Nix Installer](https://github.com/DeterminateSystems/nix-installer).
 Make sure flakes and nix-command are enabled (the Determinate Installer will enable them by default).
 
-Once you have `nix`, simply type
+Once you have `nix`, simply type:
 
 ```bash
 nix develop

app/Main.hs

@@ -1,7 +1,5 @@
--- requires 'at' for running a command at a certain time
--- requires 'date' for converting unix time to human readable time
 -- run on boot and at noon and midnight
--- don't add commands to at while this script is running (monadic purity must be preserved)
+-- don't add commands to `at` while this script is running (monadic purity must be preserved)
 
 module Main where
 

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "Flake for suntheme's development environment and builds";
+  description = "Suntheme's development and build environment";
 
   inputs.haskellNix.url = "github:input-output-hk/haskell.nix";
   inputs.nixpkgs.follows = "haskellNix/nixpkgs-unstable";
@@ -29,6 +29,9 @@
               hlint = {};
               haskell-language-server = {};
             };
+            shell.buildInputs = with pkgs; [
+              at
+            ];
           };
         })
       ];
@@ -46,8 +49,8 @@
       });
 
   nixConfig = {
-    extra-substituters = ["https://cache.iog.io"];
-    extra-trusted-public-keys = ["hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="];
+    extra-substituters = ["https://cache.iog.io" "https://suntheme.cachix.org"];
+    extra-trusted-public-keys = ["hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" "suntheme.cachix.org-1:fHjlz7YAmMUcLp3tsZis8g9wIsDS6HvECGR3uZETGRo="];
     allow-import-from-derivation = "true";
   };
 }