From adfdaf186573a02c8654d142c8548e614804b4f0 Mon Sep 17 00:00:00 2001
From: Alexander Heldt <me@alexanderheldt.se>
Date: Thu, 9 Nov 2023 22:05:18 +0100
Subject: [PATCH] pinwheel: Add `skal` to handle `nix develop` shells

---
 hosts/pinwheel/configuration.nix              |  4 ++
 hosts/pinwheel/modules/skal/default.nix       | 55 +++++++++++++++++++
 .../pinwheel/modules/skal/flake-template.nix  | 18 ++++++
 3 files changed, 77 insertions(+)
 create mode 100644 hosts/pinwheel/modules/skal/default.nix
 create mode 100644 hosts/pinwheel/modules/skal/flake-template.nix

diff --git a/hosts/pinwheel/configuration.nix b/hosts/pinwheel/configuration.nix
index 3040c68..c52e452 100644
--- a/hosts/pinwheel/configuration.nix
+++ b/hosts/pinwheel/configuration.nix
@@ -75,6 +75,10 @@
   };
 
   mod = {
+    skal = {
+      path = "/home/alex/code/own/skal";
+    };
+
     nix-index.enable = false;
     greetd.enable = true;
     hyprland.enable = true;
diff --git a/hosts/pinwheel/modules/skal/default.nix b/hosts/pinwheel/modules/skal/default.nix
new file mode 100644
index 0000000..b45c749
--- /dev/null
+++ b/hosts/pinwheel/modules/skal/default.nix
@@ -0,0 +1,55 @@
+{ pkgs, lib, config, ... }:
+let
+  skalPath = config.mod.skal.path;
+
+  skal =
+    if skalPath == "" then
+      throw "'skal.path' cannot be empty"
+   else
+     pkgs.writeShellScriptBin "skal" ''
+       URL=`git config --get remote.origin.url`
+       GITHOST=`echo $URL | sed -e s/.*@// | sed -e s/:.*//`
+       GITPATH=`echo $URL | sed -e s/.*:// | sed -e s/.git$//`
+
+       FLAKE_DIR="${skalPath}/$GITHOST/$GITPATH"
+
+       if [ "$1" == "create" ]; then
+         if [ ! -d "$FLAKE_DIR" ]; then
+           echo Creating flake "$FLAKE_DIR"
+           mkdir -p "$FLAKE_DIR"
+           FLAKE="$FLAKE_DIR"/flake.nix
+           cp ${./flake-template.nix} "$FLAKE"
+           chmod 700 "$FLAKE"
+           ${pkgs.vim}/bin/vim "$FLAKE"
+           exit 0
+         else
+           echo Flake already exist
+         fi
+       fi
+
+       if [ ! -d $FLAKE_DIR ]; then
+         echo No flake exist for "$FLAKE_DIR"
+         exit 1
+       fi
+
+       echo Using "$FLAKE_DIR"
+       nix develop $FLAKE_DIR $*
+     '';
+in
+{
+  options = {
+    mod.skal = {
+      path = lib.mkOption {
+        description = "path to where all flake.nix reside";
+        type = lib.types.str;
+        default = "";
+      };
+    };
+  };
+
+  config = {
+    home-manager.users.alex = {
+      home.packages = [ skal ];
+    };
+  };
+}
diff --git a/hosts/pinwheel/modules/skal/flake-template.nix b/hosts/pinwheel/modules/skal/flake-template.nix
new file mode 100644
index 0000000..2f280cf
--- /dev/null
+++ b/hosts/pinwheel/modules/skal/flake-template.nix
@@ -0,0 +1,18 @@
+{
+  description = "";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+      {
+        devShells."${system}".default = pkgs.mkShell {
+          packages = [];
+        };
+      };
+}