nix: refactor and clean up flake

Author: faukah

.github/workflows/merge.yaml

@@ -65,7 +65,7 @@ jobs:
       - name: Install nix
         uses: DeterminateSystems/nix-installer-action@v17
       - name: Build
-        run: nix build .#dev.presenterm
+        run: nix build .#presenterm
 
   bat-assets:
     name: Validate bat assets

flake.lock

@@ -1,64 +1,24 @@
 {
   description = "A terminal slideshow tool";
 
-  inputs = {
-    flakebox = {
-      url = "github:rustshop/flakebox?rev=62af969ab344229d2a0d585a482293b3f186b221";
+  inputs.nixpkgs.url = "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz";
+
+  outputs =
+    { nixpkgs, self }:
+    let
+      inherit (nixpkgs.lib) genAttrs systems;
+      forEachSystem = genAttrs systems.flakeExposed;
+      pkgsForEach = nixpkgs.legacyPackages;
+      rev = self.shortRev or self.dirtyShortRev or "unknown";
+    in
+    {
+      packages = forEachSystem (system: {
+        presenterm = pkgsForEach.${system}.callPackage ./package.nix { inherit rev; };
+        default = self.packages.${system}.presenterm;
+      });
+
+      devShells = forEachSystem (system: {
+        default = pkgsForEach.${system}.callPackage ./shell.nix { };
+      });
     };
-
-    flake-utils.url = "github:numtide/flake-utils";
-  };
-
-  outputs = { self, flake-utils, flakebox }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        projectName = "presenterm";
-        pkgs = flakebox.inputs.nixpkgs.legacyPackages.${system};
-
-        flakeboxLib = flakebox.lib.mkLib pkgs {
-          config = {
-            github.ci.buildOutputs = [ ".#ci.${projectName}" ];
-          };
-        };
-
-        buildPaths = [
-          "build.rs"
-          "Cargo.toml"
-          "Cargo.lock"
-          ".cargo"
-          "src"
-          "themes"
-          "bat"
-          "executors.yaml"
-        ];
-
-        buildSrc = flakeboxLib.filterSubPaths {
-          root = builtins.path {
-            name = projectName;
-            path = ./.;
-          };
-          paths = buildPaths;
-        };
-
-        multiBuild =
-          (flakeboxLib.craneMultiBuild { }) (craneLib':
-            let
-              craneLib = (craneLib'.overrideArgs {
-                pname = projectName;
-                src = buildSrc;
-                nativeBuildInputs = [ ];
-              });
-            in
-            {
-              ${projectName} = craneLib.buildPackage { };
-            });
-      in
-      {
-        packages.default = multiBuild.${projectName};
-
-        legacyPackages = multiBuild;
-
-        devShells = flakeboxLib.mkShells { };
-      }
-    );
 }