From cd7c8e2172943f00331d44d4b49d7f8c201e42d7 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Sat, 3 Apr 2021 17:35:14 +0000
Subject: [PATCH] lib: attrs: add renaming functions

---
 lib/attrs.nix | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/lib/attrs.nix b/lib/attrs.nix
index 7b86aaa..84b63c7 100644
--- a/lib/attrs.nix
+++ b/lib/attrs.nix
@@ -1,6 +1,6 @@
 { lib, ... }:
 let
-  inherit (lib) filterAttrs listToAttrs mapAttrs';
+  inherit (lib) filterAttrs listToAttrs mapAttrs' nameValuePair;
 in
 {
   # Filter a generated set of attrs using a predicate function.
@@ -18,4 +18,19 @@ in
   #   (value -> { name = any; value = any; })
   #   attrs
   genAttrs' = values: f: listToAttrs (map f values);
+
+  # Rename each of the attributes in an attribute set using the mapping function
+  #
+  # renameAttrs ::
+  #   (name -> new name)
+  #   attrs
+  renameAttrs = f: mapAttrs' (name: value: nameValuePair (f name) value);
+
+  # Rename each of the attributes in an attribute set using a function which
+  # takes the attribute's name and value as inputs.
+  #
+  # renameAttrs' ::
+  #   (name -> value -> new name)
+  #   attrs
+  renameAttrs' = f: mapAttrs' (name: value: nameValuePair (f name value) value);
 }