From 2981ad0a2797f4cde8e2090f7d1ce2ee22bd1e5d Mon Sep 17 00:00:00 2001
From: Akira Komamura <akira.komamura@gmail.com>
Date: Thu, 19 Sep 2024 20:08:32 +0900
Subject: [PATCH] feat: Expose a function to build a single Emacs Lisp package

---
 lib/default.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/default.nix b/lib/default.nix
index 23013c3..8e9f196 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -41,4 +41,18 @@ in
       (split "\n")
       (filter (s: isString s && s != ""))
     ];
+
+  # A function that builds a single Emacs Lisp package. The argument should be
+  # an attribute set that takes the same form as an entry value in
+  # packageInputs. Most attributes for basic usage are self-explanatory, but it
+  # requires elispInputs, which is a list of derivations that contain Emacs Lisp
+  # source files in share/emacs/site-lisp directory and (optional)
+  # native-compiled libraries in share/emacs/native-lisp directory.
+  buildElispPackage =
+    pkgs:
+    pkgs.callPackage ../pkgs/emacs/build {
+      lib = import ../pkgs/build-support {
+        inherit inputs pkgs;
+      };
+    };
 }