feat: added zig loaders for unix and refactor

flake.nix

@@ -35,8 +35,6 @@
       url = "https://download.freebsd.org/releases/amd64/14.1-RELEASE/base.txz";
       flake = false;
     };
-    # command for later:
-    # echo '000007: 09' | xxd -r - target/x86_64-unknown-freebsd/debug/sparse-beacon
   };
 
   outputs = { self, nixpkgs, flake-utils, crane, rust-overlay, advisory-db
@@ -54,7 +52,7 @@
             freebsd-libs-packed;
         };
         inherit (system-libs)
-          bsd-toolchain winpcap-drivers freebsd-libs libnl libpcap-linux-gnu
+          freebsd-toolchain winpcap-drivers freebsd-libs libnl libpcap-linux-gnu
           libpcap-linux-musl libpcap-freebsd;
 
         buildTools = with pkgs; [
@@ -77,10 +75,13 @@
         ];
 
         devShellTools = with pkgs; [
+          # Language servers
           rust-analyzer
+          zls
+
+          # Cargo lint tools
           taplo
           cargo-deny
-          cargo-generate
         ];
 
         craneLib = (crane.mkLib pkgs).overrideToolchain (p:
@@ -111,6 +112,10 @@
           inherit pkgs buildTools buildEnvironment craneLib advisory-db
             winpcap-libs;
         } // system-libs);
+
+        setup-zig-freebsd = pkgs.writeScriptBin "setup-zig-freebsd" ''
+          cp ${outputs.packages.freebsd-zig-libc} $(${pkgs.git}/bin/git rev-parse --show-toplevel)/unix-loader/freebsd.txt
+        '';
       in {
         packages = outputs.packages;
         checks = outputs.checks;
@@ -119,7 +124,7 @@
           default = craneLib.devShell (buildEnvironment // {
             name = "sparse-default";
 
-            packages = buildTools ++ devShellTools;
+            packages = buildTools ++ devShellTools ++ [ setup-zig-freebsd ];
           });
         };
       });