From 1b314a70c25aafa49e76addbbde1f567f1e54834 Mon Sep 17 00:00:00 2001
From: Michael Alan Dorman <mdorman@ironicdesign.com>
Date: Fri, 13 May 2016 06:35:19 -0400
Subject: [PATCH] Revert "Remove obsolete pcache version"

This reverts commit 5cc4ff09fac74ba9717b8663e5713faf88d71386.
---
 .../editors/emacs-modes/pcache/default.nix    | 30 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 ++
 2 files changed, 32 insertions(+)
 create mode 100644 pkgs/applications/editors/emacs-modes/pcache/default.nix

diff --git a/pkgs/applications/editors/emacs-modes/pcache/default.nix b/pkgs/applications/editors/emacs-modes/pcache/default.nix
new file mode 100644
index 000000000000..f4dcf03dee84
--- /dev/null
+++ b/pkgs/applications/editors/emacs-modes/pcache/default.nix
@@ -0,0 +1,30 @@
+{ stdenv, fetchgit, emacs }:
+
+stdenv.mkDerivation rec {
+  name = "pcache-0.2.3";
+
+  src = fetchgit {
+    url = "https://github.com/sigma/pcache.git";
+    rev = "fa8f863546e2e8f2fc0a70f5cc766a7f584e01b6";
+    sha256 = "f7cdad5a729b24f96ec69db4adfd19daf45c27aaf3a0267385b252cb2e59daa0";
+  };
+
+  buildInputs = [ emacs ];
+
+  buildPhase = ''
+    emacs --batch -f batch-byte-compile pcache.el
+  '';
+
+  installPhase = ''
+    install -d $out/share/emacs/site-lisp
+    install pcache.el pcache.elc $out/share/emacs/site-lisp
+  '';
+
+  meta = {
+    description = "Persistent caching for Emacs";
+    homepage = https://github.com/sigma/pcache.el;
+    license = stdenv.lib.licenses.gpl2Plus;
+
+    platforms = stdenv.lib.platforms.all;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a064a187bd50..60ea94f2b5df 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12340,6 +12340,8 @@ in
 
     org2blog = callPackage ../applications/editors/emacs-modes/org2blog { };
 
+    pcache = callPackage ../applications/editors/emacs-modes/pcache { };
+
     phpMode = callPackage ../applications/editors/emacs-modes/php { };
 
     prologMode = callPackage ../applications/editors/emacs-modes/prolog { };