style: Init mkBinaryInstall (#12)

* chore: Init mkBinaryInstall function

* chore: Edit mkBinaryInstall

* feat: Init surrealdb v1.4.2 without sha256

* chore: Init example dir

* feat: Init sha256

* style: nix-fmt

default.nix

@@ -1,24 +1,13 @@
-self: super: {
-  surrealdb = {
-    "1.4.2" = let
-      inherit (super.stdenv.hostPlatform) system;
-      rpath = super.lib.makeLibraryPath [ super.pkgs.gcc-unwrapped ];
-    in super.stdenv.mkDerivation rec {
-      pname = "surrealdb";
-      version = "1.4.2";
+self: super:
+let
+  lib = super.lib;
+  fetchurl = super.fetchurl;
+  rpath = super.lib.makeLibraryPath [ super.pkgs.gcc-unwrapped ];
+  mkBinaryInstall = { pname ? "surrealdb", version, url, sha256 }:
+    super.stdenv.mkDerivation rec {
+      inherit pname version;
 
-      src = {
-        x86_64-linux = super.fetchurl {
-          url =
-            "https://github.com/surrealdb/surrealdb/releases/download/v${version}/surreal-v${version}.linux-amd64.tgz";
-          hash = "sha256-JaHfiAZFgKP5RS0GCQBakYKHPnIqOtds1J65yTznGoI=";
-        };
-        aarch64-linux = super.fetchurl {
-          url =
-            "https://github.com/surrealdb/surrealdb/releases/download/v${version}/surreal-v${version}.linux-arm64.tgz";
-          hash = "sha256-hlMtgEaonW41TTd2Ilrx3oXY5mdnZjfccPmg4x/6qnU=";
-        };
-      }.${system};
+      src = fetchurl { inherit url sha256; };
 
       sourceRoot = ".";
 
@@ -36,13 +25,21 @@ self: super: {
         patchelf --set-rpath ${rpath} "$out/bin/surreal" || true
       '';
 
-      meta = with super.lib; {
+      meta = with lib; {
         description =
           "A scalable, distributed, collaborative, document-graph database, for the realtime web";
         homepage = "https://surrealdb.com/";
         mainProgram = "surreal";
         license = licenses.bsl11;
       };
     };
+in {
+  surrealdb = {
+    "1.4.2" = mkBinaryInstall {
+      version = "1.4.2";
+      url =
+        "https://github.com/surrealdb/surrealdb/releases/download/v1.4.2/surreal-v1.4.2.linux-arm64.tgz";
+      sha256 = "0xdaz8gy787rf3f3frk7czkdi1fyy5d24xip9lsnx7d88s02slw6";
+    };
   };
 }

example/v1.4.2.nix

@@ -0,0 +1,4 @@
+{ pkgs ? import <nixpkgs> { inherit overlays; }
+, overlays ? [ (import ../default.nix) ], mkShell ? pkgs.mkShell }:
+
+mkShell { packages = [ pkgs.surrealdb."1.4.2" ]; }