From de46e9864b954b8fdece73a0dcaa048dd7d527f7 Mon Sep 17 00:00:00 2001
From: Roberto Alsina <roberto.alsina@gmail.com>
Date: Sat, 6 Jul 2024 21:37:30 -0300
Subject: [PATCH] Make caddy reload reactive on modified file

---
 config/Caddyfile    |  8 ++++++++
 shard.lock          |  4 ++++
 shard.yml           |  4 +++-
 src/daemon/proxy.cr | 11 ++++++++---
 4 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/config/Caddyfile b/config/Caddyfile
index 29669d7..276e7fd 100644
--- a/config/Caddyfile
+++ b/config/Caddyfile
@@ -15,4 +15,12 @@ http://*:8888 {
   handle_path /admin/* {
     reverse_proxy /* http://127.0.0.1:3000
   }
+
+      handle_path /faaso/exp/* {
+        reverse_proxy /* http://faaso-exp-6ne49v:3000 {
+          health_uri /ping
+          fail_duration 30s
+        }
+      }
+      
 }
diff --git a/shard.lock b/shard.lock
index dbfe162..cccfdd6 100644
--- a/shard.lock
+++ b/shard.lock
@@ -36,6 +36,10 @@ shards:
     git: https://github.com/mamantoha/http_proxy.git
     version: 0.10.3
 
+  inotify:
+    git: https://github.com/petoem/inotify.cr.git
+    version: 1.0.3
+
   kemal:
     git: https://github.com/kemalcr/kemal.git
     version: 1.5.0
diff --git a/shard.yml b/shard.yml
index 1c792aa..eb29fd1 100644
--- a/shard.yml
+++ b/shard.yml
@@ -30,6 +30,8 @@ dependencies:
     github: kemalcr/kemal
   rucksack:
     github: busyloop/rucksack
-
+  inotify:
+    github: petoem/inotify.cr
+    
 scripts:
   postinstall: cat .rucksack >> bin/faaso
\ No newline at end of file
diff --git a/src/daemon/proxy.cr b/src/daemon/proxy.cr
index bb2559c..281bcc1 100644
--- a/src/daemon/proxy.cr
+++ b/src/daemon/proxy.cr
@@ -1,11 +1,17 @@
-require "docr"
 require "./funko.cr"
+require "docr"
+require "inotify"
 require "kemal"
 
 module Proxy
   CADDY_CONFIG_PATH = "config/Caddyfile"
   @@current_config = File.read(CADDY_CONFIG_PATH)
 
+  @@watcher = Inotify.watch(CADDY_CONFIG_PATH) do |_|
+    Log.info { "Reloading caddy config" }
+    Process.run(command: "caddy", args: ["reload", "--config", CADDY_CONFIG_PATH])
+  end
+
   # Get current proxy config
   get "/proxy/" do
     @@current_config
@@ -69,14 +75,13 @@ CONFIG
         file << config
       end
       # Reload config
-      Process.run(command: "caddy", args: ["reload", "--config", "Caddyfile"])
       @@current_config = config
     end
     config
   end
 end
 
-# Update proxy config once a second
+# Update proxy config every 1 second (if changed)
 spawn do
   loop do
     Proxy.update_proxy_config