From 75805267b9724ce35294e65152ef96a19e7e7bea Mon Sep 17 00:00:00 2001
From: Andrew Newdigate <andrew@troupe.co>
Date: Mon, 22 May 2017 12:13:23 +0100
Subject: Added restart script

---
 restarts.sh | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 restarts.sh

diff --git a/restarts.sh b/restarts.sh
new file mode 100755
index 000000000..051e7a4fb
--- /dev/null
+++ b/restarts.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+IFS=$'\n\t'
+
+process_pid=""
+new_process_pid=""
+
+function start {
+    GITALY_LISTEN_ADDR=:1828 go run cmd/gitaly/main.go &
+    process_pid=$!
+}
+
+function restart {
+    GITALY_LISTEN_ADDR=:1828 go run cmd/gitaly/main.go &
+    new_process_pid=$!
+
+    # Give the new process time to start listening before killing the old one
+    sleep 2 
+
+    kill -s TERM ${process_pid} || true 
+    process_pid=${new_process_pid}
+    new_process_pid=""
+}
+
+function finish {
+    # Last ditch attempt to cleanup before termination
+    kill -s TERM ${process_pid} || true
+
+    # If this is run while both the old and new processes are running
+    # we need to make sure we terminate both processes
+    if [[ -n "${new_process_pid}" ]]; then  
+       kill -s TERM ${new_process_pid} || true
+    fi 
+}
+
+function forward_signal {    
+    kill -s ${1} ${process_pid}
+}
+
+function await_process {
+    set +e
+    wait -n
+    local wait_status=$?
+    set -e
+
+    if [[ ${wait_status} == 0 ]] || [[ ${wait_status} == 129 ]] ; then
+        return
+    else 
+        exit ${wait_status}
+    fi
+
+}
+
+trap restart SIGHUP
+trap finish EXIT
+
+for sig in STOP CONT ALRM INT QUIT USR1 USR2 TERM; do
+    trap "forward_signal ${sig}" ${sig}
+done
+
+start
+
+while true; do
+    await_process
+    sleep 1
+
+    if [[ -z $(jobs -r) ]]; then
+        exit 
+    fi
+done
-- 
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