From 2bcfeccb1aedb63cbd039ecf645cdebc30fd66fc Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Fri, 30 Aug 2024 11:07:18 +0200
Subject: [PATCH 1/2] stdenv: inherit meta from src.meta

This opens the road to removing a lot of the repetition we see in the
meta attributes. Most of the time, computed values such as the changelog
URL are already known from the source fetcher.
---
 pkgs/stdenv/generic/check-meta.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/stdenv/generic/check-meta.nix b/pkgs/stdenv/generic/check-meta.nix
index 502343f01fb32..27db9c42ddc3b 100644
--- a/pkgs/stdenv/generic/check-meta.nix
+++ b/pkgs/stdenv/generic/check-meta.nix
@@ -481,6 +481,7 @@ let
         ]
         ++ optional (hasOutput "man") "man";
     }
+    // attrs.src.meta or { }
     // attrs.meta or { }
     # Fill `meta.position` to identify the source location of the package.
     // optionalAttrs (pos != null) {

From 69c77332ed9985c992d5979fa0e3f90c94f61161 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Fri, 30 Aug 2024 10:56:16 +0200
Subject: [PATCH 2/2] fetchFromGitHub: add computed meta.changelog

Assume that the changelog is attached to the release.
---
 pkgs/build-support/fetchgithub/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/build-support/fetchgithub/default.nix b/pkgs/build-support/fetchgithub/default.nix
index 4ce3c6e84d768..21ddeb2cbfc0d 100644
--- a/pkgs/build-support/fetchgithub/default.nix
+++ b/pkgs/build-support/fetchgithub/default.nix
@@ -17,7 +17,9 @@ let
     else builtins.unsafeGetAttrPos "rev" args
   );
   baseUrl = "https://${githubBase}/${owner}/${repo}";
-  newMeta = meta // {
+  newMeta = {
+    changelog = "${baseUrl}/releases/tag/${lib.removePrefix "refs/tags/" rev}";
+  } // meta // {
     homepage = meta.homepage or baseUrl;
   } // lib.optionalAttrs (position != null) {
     # to indicate where derivation originates, similar to make-derivation.nix's mkDerivation