From ad5b090853d381efcc0e2e7f87eaf364aa4abac6 Mon Sep 17 00:00:00 2001
From: Tim Cuthbertson <tim@gfxmonk.net>
Date: Sun, 22 Apr 2018 11:31:41 +1000
Subject: [PATCH] gup: add `passthru.updateScript`

---
 .../tools/build-managers/gup/default.nix      | 21 +++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/tools/build-managers/gup/default.nix b/pkgs/development/tools/build-managers/gup/default.nix
index 748a59bda2f3..f6d5b7b9b59c 100644
--- a/pkgs/development/tools/build-managers/gup/default.nix
+++ b/pkgs/development/tools/build-managers/gup/default.nix
@@ -1,11 +1,11 @@
-{ stdenv, fetchFromGitHub, lib, python, which, pychecker ? null }:
+{ stdenv, fetchFromGitHub, nix-update-source, lib, python, which, pychecker ? null }:
 stdenv.mkDerivation rec {
   version = "0.7.0";
   src = fetchFromGitHub {
-    sha256 = "1pwnmlq2pgkkln9sgz4wlb9dqlqw83bkf105qljnlvggc21zm3pv";
-    rev = "version-${version}";
-    repo = "gup";
     owner = "timbertson";
+    repo = "gup";
+    rev = "version-0.7.0";
+    sha256 = "1pwnmlq2pgkkln9sgz4wlb9dqlqw83bkf105qljnlvggc21zm3pv";
   };
   name = "gup-${version}";
   buildInputs = lib.remove null [ python which pychecker ];
@@ -15,6 +15,19 @@ stdenv.mkDerivation rec {
     mkdir $out
     cp -r python/bin $out/bin
   '';
+  passthru.updateScript = ''
+    set -e
+    echo
+    cd ${toString ./.}
+    ${nix-update-source}/bin/nix-update-source \
+      --prompt version \
+      --replace-attr version \
+      --set owner timbertson \
+      --set repo gup \
+      --set type fetchFromGitHub \
+      --set rev 'version-{version}' \
+      --modify-nix default.nix
+  '';
   meta = {
     inherit (src.meta) homepage;
     description = "A better make, inspired by djb's redo";