feat(cli): nix flake for CLI

.github/release-please-config.json

@@ -8,7 +8,7 @@
     ".": {
       "component": "cli",
       "package-name": "hcloud-upload-image",
-      "extra-files": ["internal/version/version.go"]
+      "extra-files": ["internal/version/version.go", "hcloud-upload-image.nix"]
     },
     "hcloudimages": {
       "component": "hcloudimages",

flake.nix

@@ -0,0 +1,27 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; # unstable for go 1.22
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          system = system;
+        };
+        hcloud-upload-image = pkgs.callPackage ./hcloud-upload-image.nix { };
+      in
+      {
+        packages = {
+          default = hcloud-upload-image;
+        };
+
+        devShells = {
+          default = pkgs.mkShell {
+            packages = [ hcloud-upload-image ];
+          };
+        };
+      }
+    );
+}

hcloud-upload-image.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, fetchFromGitHub, ... }:
+
+pkgs.buildGo122Module rec {
+  pname = "hcloud-upload-image";
+  version = "v0.2.1"; # x-release-please-version
+  #src = pkgs.fetchFromGitHub {
+  #  owner = "apricote";
+  #  repo = "hcloud-upload-image";
+  #  rev = version;
+  #  sha256 = "KYhmMo/GDiLOWuEtdiY/KDwh1MO3crAFN2SGiL8FFIU=";
+  #};
+  src = ./.;
+
+  vendorHash = "";
+  overrideModAttrs = _: {
+    #outputHash = "sha256-/FluEFTvrX07L4kGPH7jPrcRhwdrCz1p4OVErNegNLw=";
+    #outputHash = null;
+    #outputHashAlgo = null;
+    #outputHashMode = null;
+  };
+
+  nativeBuildInputs = [
+    pkgs.installShellFiles
+  ];
+
+  preBuild = ''
+    export GOWORK=off
+  '';
+
+  subPackages = [ "." ]; # We only need to CLI, fails with the "hcloudimages" module otherwise
+  CGO_ENABLED = "0";
+
+  ldflags = [
+    "-X github.com/apricote/hcloud-upload-image/internal/version.version=${version}"
+    "-X github.com/apricote/hcloud-upload-image/internal/version.versionPrerelease="
+  ];
+
+  postInstall = ''
+    installShellCompletion --cmd hcloud-upload-image \
+      --bash <($out/bin/hcloud-upload-image completion bash) \
+      --fish <($out/bin/hcloud-upload-image completion fish) \
+      --zsh <($out/bin/hcloud-upload-image completion zsh)
+  '';
+}