From fa17cfe8782b51f39900cb216cb44c6cc6747856 Mon Sep 17 00:00:00 2001
From: David Arnold <david.arnold@iohk.io>
Date: Sun, 6 Nov 2022 00:12:15 -0500
Subject: feat: trim the build to the minimum

on a slow finicky target machine, no time to pull gcc
---
 flake.nix | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

(limited to 'flake.nix')

diff --git a/flake.nix b/flake.nix
index adb2add..cd955a2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,12 +9,38 @@
       inherit (nixpkgs) lib;
     };
     packages.x86_64-linux.disko = let
+      inherit (nixpkgs) lib;
       pkgs = nixpkgs.legacyPackages.x86_64-linux;
-    in pkgs.stdenv.mkDerivation {
+      inclFiles = {src, name}: files: lib.cleanSourceWith {
+        inherit src name;
+        filter = _path: _type: _type == "regular"
+          && lib.any (file: builtins.baseNameOf _path == file) files;
+      };
+    in derivation rec{
+      system = "x86_64-linux";
       name = "disko";
-      src = ./.;
+      builder = "/bin/sh";
+      PATH    = "${pkgs.coreutils}/bin:${pkgs.gnused}/bin";
+      passAsFile = ["buildPhase"];
+      buildPhase = ''
+        mkdir -p $out/bin $out/share/disko
+	cp -r $src/* $out/share/disko
+	sed \
+	  -e "s|libexec_dir=\".*\"|libexec_dir=\"$out/share/disko\"|" \
+	  -e "s|#!/usr/bin/env.*|#!/usr/bin/env bash|" \
+	  $src/disko > $out/bin/disko
+	chmod 755 $out/bin/disko
+      '';
+      args = ["-c" ". $buildPhasePath"];
+      src = inclFiles { inherit name; src = ./.; } [
+        "disko"
+        "cli.nix"
+        "default.nix"
+        "types.nix"
+        "options.nix"
+      ];
+    } // {
       meta.description = "Format disks with nix-config";
-      installFlags = [ "PREFIX=$(out)" ];
     };
     packages.x86_64-linux.default = self.packages.x86_64-linux.disko;
     checks.x86_64-linux = let
-- 
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