feat: add flake

README.md

@@ -92,3 +92,9 @@ echo Adding git tag with version v0.0.${VERSION}
 git tag v0.0.${VERSION}
 git push origin v0.0.${VERSION}
 ```
+
+### update-nix
+Updates nix flake.
+```
+sh ./update-nix.sh
+```

doc/content/getting-started.md

@@ -28,8 +28,31 @@ TODO
 ```
 {{% /details %}}
 {{% details "Nix" %}}
+There is a nix flake that can be used:
 ```sh
-TODO
+nix develop github:joerdav/xc
+```
+Or to create your own `xc.nix`, replace `<version>` and add the correct `sha256` and `vendorSha256` for the version:
+```nix
+{ config, pkgs, fetchFromGitHub, ... }:
+
+let
+  xc = pkgs.buildGoModule rec {
+    pname = "xc";
+    version = "<version>";
+    subPackages = ["cmd/xc"];
+    src = pkgs.fetchFromGitHub {
+      owner = "joerdav";
+      repo = "xc";
+      rev = version;
+      sha256 = "";
+    };
+    vendorSha256 = "";
+  };
+in
+{
+  environment.systemPackages = [ xc ];
+}
 ```
 {{% /details %}}
 {{% details "Scoop" %}}

flake.nix

@@ -0,0 +1,30 @@
+{
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    flake-utils.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let 
+        pkgs = import nixpkgs {
+          system = system;
+        };
+        xc = pkgs.callPackage ./xc.nix {};
+      in
+      {
+        defaultPackage = xc;
+        packages = { 
+          xc = xc;
+        };
+        devShells = {
+          default = pkgs.mkShell {
+            packages = [ xc ];
+          };
+          xc = pkgs.mkShell {
+            packages = [ xc ];
+          };
+        };
+      }
+    );
+}

update-nix.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+sed -e "s/__VERSION__/$(git describe --tags --abbrev=0)/g" xc.nix.tmpl > xc.nix
+
+# We first try to build and it fails with hash mismatch, and we use it to populate sha256.
+nix-build -E 'with import <nixpkgs> { }; callPackage ./xc.nix { }'
+SRC_SHA256="$(nix-build -E 'with import <nixpkgs> { }; callPackage ./xc.nix { }' 2>&1 | grep -oE 'got:\s+sha256-\S+' | cut -d "-" -f 2)"
+sed -i -e "s|sha256 = lib.fakeSha256;|sha256 = \"$SRC_SHA256\";|g" xc.nix
+
+# We try again to build and it fails with hash mismatch, and we use it to populate vendorSha256.
+VENDOR_SHA256="$(nix-build -E 'with import <nixpkgs> { }; callPackage ./xc.nix { }' 2>&1 | grep -oE 'got:\s+sha256-\S+' | cut -d "-" -f 2)"
+sed -i -e "s|vendorSha256 = lib.fakeSha256;|vendorSha256 = \"$VENDOR_SHA256\";|g" xc.nix
+

xc.nix

@@ -0,0 +1,14 @@
+{ config, lib, pkgs, fetchFromGitHub, ... }:
+
+pkgs.buildGoModule rec {
+  pname = "xc";
+  version = "v0.0.110";
+  subPackages = ["cmd/xc"];
+  src = pkgs.fetchFromGitHub {
+    owner = "joerdav";
+    repo = "xc";
+    rev = version;
+    sha256 = "Yn+9FPYPwx1BfDf45uaNZ5fLEIu6LgN6ihw4eDAT9mY=";
+  };
+  vendorSha256 = "14dtguu787VR8/sYA+9WaS6xr/dB6ZcUjOzDEkFDpH4=";
+}

xc.nix.tmpl

@@ -0,0 +1,14 @@
+{ config, lib, pkgs, fetchFromGitHub, ... }:
+
+pkgs.buildGoModule rec {
+  pname = "xc";
+  version = "__VERSION__";
+  subPackages = ["cmd/xc"];
+  src = pkgs.fetchFromGitHub {
+    owner = "joerdav";
+    repo = "xc";
+    rev = version;
+    sha256 = lib.fakeSha256;
+  };
+  vendorSha256 = lib.fakeSha256;
+}