From 97710ced7ea5b5d8025dc6a3e43d82e9a280920e Mon Sep 17 00:00:00 2001
From: Kevin Stock <kevinstock@tantalic.com>
Date: Sun, 1 Oct 2017 19:36:23 -0700
Subject: [PATCH] Add hook for instance startup (#1888)

Provides a new hook for plugins as a means to provide the current caddy.Instance when starting or restarting.
---
 caddy.go               | 3 +++
 caddy/caddymain/run.go | 3 +++
 plugins.go             | 7 ++++---
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/caddy.go b/caddy.go
index 3225917b..902a1a39 100644
--- a/caddy.go
+++ b/caddy.go
@@ -213,6 +213,9 @@ func (i *Instance) Restart(newCaddyfile Input) (*Instance, error) {
 	}
 	i.Stop()
 
+	// Execute instantiation events
+	EmitEvent(InstanceStartupEvent, newInst)
+
 	log.Println("[INFO] Reloading complete")
 
 	return newInst, nil
diff --git a/caddy/caddymain/run.go b/caddy/caddymain/run.go
index 106b6e5e..81f97f2a 100644
--- a/caddy/caddymain/run.go
+++ b/caddy/caddymain/run.go
@@ -140,6 +140,9 @@ func Run() {
 		mustLogFatalf("%v", err)
 	}
 
+	// Execute instantiation events
+	caddy.EmitEvent(caddy.InstanceStartupEvent, instance)
+
 	// Twiddle your thumbs
 	instance.Wait()
 }
diff --git a/plugins.go b/plugins.go
index 8fbc4ec9..f5372184 100644
--- a/plugins.go
+++ b/plugins.go
@@ -233,9 +233,10 @@ type EventName string
 
 // Define names for the various events
 const (
-	StartupEvent   EventName = "startup"
-	ShutdownEvent  EventName = "shutdown"
-	CertRenewEvent EventName = "certrenew"
+	StartupEvent         EventName = "startup"
+	ShutdownEvent        EventName = "shutdown"
+	CertRenewEvent       EventName = "certrenew"
+	InstanceStartupEvent EventName = "instancestartup"
 )
 
 // EventHook is a type which holds information about a startup hook plugin.