From a1cb111cc3c53066491f007b2dcaca4076def7ec Mon Sep 17 00:00:00 2001
From: Robert Helgesson <robert@rycee.net>
Date: Sat, 7 Jan 2017 19:36:39 +0100
Subject: [PATCH] home-manager: handle missing `home-manager-path`

When listing packages we have to handle the case where the rebuild
command has not yet been run.
---
 home-manager/home-manager | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/home-manager/home-manager b/home-manager/home-manager
index 63dac595f..1667564a1 100644
--- a/home-manager/home-manager
+++ b/home-manager/home-manager
@@ -29,7 +29,11 @@ function doListGens() {
 function doListPackages() {
     local outPath
     outPath="$(nix-env -q --out-path | grep -o '/.*home-manager-path$')"
-    nix-store -q --references "$outPath" | sed 's/[^-]*-//'
+    if [[ -n "$outPath" ]] ; then
+        nix-store -q --references "$outPath" | sed 's/[^-]*-//'
+    else
+        echo "No home-manager packages seem to be installed."
+    fi
 }
 
 function doHelp() {