From c5053414c9a166ceee81245f2a35e792e71fae1a Mon Sep 17 00:00:00 2001
From: Ben Sima <ben@bsima.me>
Date: Wed, 25 Dec 2019 11:54:52 -0800
Subject: add usage

---
 nixos-pin | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'nixos-pin')

diff --git a/nixos-pin b/nixos-pin
index 296073a..7ff2c6a 100755
--- a/nixos-pin
+++ b/nixos-pin
@@ -1,6 +1,12 @@
 #!/usr/bin/env bash
 
-[[ -z $1 ]] && echo "usage: nix-pin <hash>" && exit 1
+function usage {
+  echo "usage: nixos-pin <hash>"
+  echo "where <hash> is a git sha from the nixpkgs repo"
+  exit 1
+}
+
+[[ -z $1 ]] && usage
 
 url="https://github.com/NixOS/nixpkgs/archive/$1.tar.gz"
 hash=$(nix-prefetch-url --unpack $url)
-- 
cgit v1.2.3