From 86167c6e6d3362a02055e9045981434d29c7cca5 Mon Sep 17 00:00:00 2001
From: Erik Arvstedt <erik.arvstedt@gmail.com>
Date: Wed, 27 Nov 2019 14:04:38 +0100
Subject: [PATCH] clightning: wait until the RPC socket appears

This fixes failures with spark-wallet which requires clightning RPC
---
 modules/clightning.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/clightning.nix b/modules/clightning.nix
index fb513b9..f3de4a0 100644
--- a/modules/clightning.nix
+++ b/modules/clightning.nix
@@ -106,6 +106,11 @@ in {
           then nix-bitcoin-services.allowTor
           else nix-bitcoin-services.allowAnyIP
         );
+      # Wait until the rpc socket appears
+      postStart = ''
+        while read f; do [[ $f == lightning-rpc ]] && break; done \
+          < <(${pkgs.inotifyTools}/bin/inotifywait --quiet --monitor -e create,moved_to --format '%f' '${cfg.dataDir}')
+      '';
     };
   };
 }