From 2c933ad3db8bd168709a967c27cfa5c3457a9006 Mon Sep 17 00:00:00 2001
From: Austin Seipp <aseipp@pobox.com>
Date: Mon, 17 Aug 2015 22:00:47 -0500
Subject: [PATCH] nixpkgs: add tarsnap shell completion utils

Signed-off-by: Austin Seipp <aseipp@pobox.com>
---
 pkgs/tools/backup/tarsnap/default.nix | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/pkgs/tools/backup/tarsnap/default.nix b/pkgs/tools/backup/tarsnap/default.nix
index 280c0cdb05ea..e2857eed7d86 100644
--- a/pkgs/tools/backup/tarsnap/default.nix
+++ b/pkgs/tools/backup/tarsnap/default.nix
@@ -1,5 +1,16 @@
 { stdenv, fetchurl, openssl, zlib, e2fsprogs }:
 
+let
+  bashCompletion = fetchurl {
+    url = "https://gist.githubusercontent.com/thoughtpolice/daa9431044883d3896f6/raw/282360677007db9739e5bf229873d3b231eb303a/tarsnap.bash";
+    sha256 = "1cj7m0n3sw9vlaz2dfvf0bgaxkv1pcc0l31zb4h5rmm8z6d33405";
+  };
+
+  zshCompletion = fetchurl {
+    url = "https://gist.githubusercontent.com/thoughtpolice/daa9431044883d3896f6/raw/282360677007db9739e5bf229873d3b231eb303a/tarsnap.zsh";
+    sha256 = "0pawqwichzpz29rva7mh8lpx4zznnrh2rqyzzj6h7z98l0dxpair";
+  };
+in
 stdenv.mkDerivation rec {
   name = "tarsnap-${version}";
   version = "1.0.35";
@@ -9,6 +20,13 @@ stdenv.mkDerivation rec {
     sha256 = "16lc14rwrq84fz95j1g10vv0qki0qw73lzighidj5g23pib6g7vc";
   };
 
+  postInstall = ''
+    # Install some handy-dandy shell completions
+    mkdir -p $out/etc/bash_completion.d $out/share/zsh/site-functions
+    cp ${bashCompletion} $out/etc/bash_completion.d/tarsnap.bash
+    cp ${zshCompletion}  $out/share/zsh/site-functions/_tarsnap
+  '';
+
   buildInputs = [ openssl zlib e2fsprogs ];
 
   meta = {