tooling: Provide a Nix Flake

.github/workflows/build-and-release.yaml

@@ -17,15 +17,23 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-
-      - name: Fetch history
-        run: git fetch --prune --unshallow
+        with:
+          # Flakes don't work on shallow clones
+          fetch-depth: 0
 
       - name: Configure Git
         run: |
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
+      - name: Install Nix
+        uses: cachix/install-nix-action@v12
+        with:
+          install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210207_fd6eaa1/install
+
+      - name: Enable Flakes
+        run: echo "experimental-features = nix-command flakes" | sudo tee -a /etc/nix/nix.conf
+
       - name: Build
         id: build-bin
         run: |
@@ -39,6 +47,10 @@ jobs:
         run: |
           echo "::set-output name=version::$(./bin/spacebar --version | cut -d- -f2)"
 
+      - name: Build with Nix
+        run: |
+          nix build
+
       - name: Get the current tag name
         if: ${{ startsWith(github.ref, 'refs/tags/') }}
         run: |

.gitignore

@@ -1,3 +1,4 @@
 /bin
 /archive
 /.idea
+result

CHANGELOG.md

@@ -22,6 +22,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Default to "Solid" style of Font Awesome 5 Free icon font
 - Option to display spaces for all displays, including: optional separator, secondary & tertiary space indicator colours in relation to display
 - Option to specify only drawing one bar on the main display or multiple bars, one for each display (this aligns with yabai's `external_bar` option)
+- Provide a [Nix Flake](https://nixos.wiki/wiki/Flakes)
 
 ## [1.2.1](https://github.com/cmacrae/spacebar/releases/tag/v1.2.1) - 2020-11-18
 

README.md

@@ -44,6 +44,27 @@ brew services start spacebar
 
 ### Nix
 A package is generally available to Nix users on macOS in the various channels.  
+A [Flake](https://nixos.wiki/wiki/Flakes) is also available in this repository and can be used like so:
+```nix
+{
+  inputs.darwin.url = "github:lnl7/nix-darwin";
+  inputs.spacebar.url = "github:cmacrae/spacebar";
+
+  outputs = { self, darwin, spacebar }: {
+    darwinConfigurations.example = darwin.lib.darwinSystem {
+      modules = [
+        {
+          nixpkgs.overlays = [
+            spacebar.overlay
+          ];
+        }
+      ];
+    };
+  };
+}
+```
+Or try it out with `nix run github:cmacrae/spacebar`!
+
 spacebar can be configured and managed in a declarative manner using the `services.spacebar` module in [nix-darwin](https://github.com/LnL7/nix-darwin)
 
 ### Accessibility Permissions
@@ -178,7 +199,8 @@ brew upgrade spacebar
 brew services start spacebar
 ```
 
-If you're using the Nix package and keeping your channels up to date, package upgrades will roll in as you command.
+If you're using the Nix package form the nixpkgs collection and keeping your channels up to date, package upgrades will roll in as you command.  
+If you're using the Nix Flake, you can update your `input.spacebar.url` to point to the latest release tag and update your lockfile.
 
 ## Requirements and Caveats
 Please read the below requirements carefully.  

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1616847335,
+        "narHash": "sha256-AQrNtJZRl9P78u+otHNXVxcQzu84vuTJLqynupp335g=",
+        "owner": "cmacrae",
+        "repo": "nixpkgs",
+        "rev": "7745d5338ad3c6cef295f40a732c6a739b1fcc7b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cmacrae",
+        "ref": "fix_spacebar",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "A minimal status bar for macOS";
+
+  # TODO: Move to official nixpkgs once PR is merged
+  #       https://github.com/NixOS/nixpkgs/pull/117780
+  inputs.nixpkgs.url = "github:cmacrae/nixpkgs/fix_spacebar";
+
+  outputs = { self, nixpkgs }:
+    let
+      pkgs = import nixpkgs {
+        config = {};
+        system = "x86_64-darwin";
+      };
+
+      buildInputs = with pkgs.darwin.apple_sdk.frameworks; [
+        Carbon
+        Cocoa
+        ScriptingBridge
+        SkyLight
+      ];
+
+      shellInputs = buildInputs ++ [ pkgs.asciidoctor ];
+    in
+      {
+        packages.x86_64-darwin.spacebar =
+          pkgs.stdenv.mkDerivation rec {
+            pname = "spacebar";
+            version = "1.3.0";
+            src = self;
+
+            inherit buildInputs;
+
+            installPhase = ''
+              mkdir -p $out/bin
+              mkdir -p $out/share/man/man1/
+              cp ./bin/spacebar $out/bin/spacebar
+              cp ./doc/spacebar.1 $out/share/man/man1/spacebar.1
+            '';
+
+            meta = with pkgs.lib; {
+              description = "A minimal status bar for macOS";
+              homepage = "https://github.com/cmacrae/spacebar";
+              platforms = platforms.darwin;
+              maintainers = [ maintainers.cmacrae ];
+              license = licenses.mit;
+            };
+          };
+
+        overlay = final: prev: {
+          spacebar = self.packages.x86_64-darwin.spacebar;
+        };
+
+        defaultPackage.x86_64-darwin = self.packages.x86_64-darwin.spacebar;
+
+        devShell.x86_64-darwin = pkgs.stdenv.mkDerivation {
+          name = "spacebar";
+          buildInputs = shellInputs;
+        };
+      };
+}