From 95ddbcbfd6d2e14b7289971f400b8b411e27502e Mon Sep 17 00:00:00 2001
From: Zhaofeng Li <hello@zhaofeng.li>
Date: Fri, 12 Feb 2021 13:54:17 -0800
Subject: [PATCH] ssh/deploy-key: Skip chown if the user/group doesn't exist

This matches the behavior of NixOps.

Potential solution to #10.
---
 src/nix/host/deploy-key.template | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/nix/host/deploy-key.template b/src/nix/host/deploy-key.template
index 339e59f..a0f94d2 100644
--- a/src/nix/host/deploy-key.template
+++ b/src/nix/host/deploy-key.template
@@ -1,15 +1,20 @@
-
 set -euo pipefail
 
 destination=%DESTINATION%
-tmp=$destination.tmp
+tmp="${destination}.tmp"
 user=%USER%
 group=%GROUP%
 permissions=%PERMISSIONS%
 
 mkdir -p $(dirname "$destination")
 touch "$tmp"
-chown "$user:$group" $tmp
-chmod "$permissions" $tmp
+
+if getent passwd "$user" >/dev/null && getent group "$group" >/dev/null; then
+	chown "$user:$group" "$tmp"
+else
+	>&2 echo "User $user and/or group $group do not exist. Skipping chown."
+fi
+
+chmod "$permissions" "$tmp"
 cat <&0 >$tmp
 mv "$tmp" "$destination"