From 93dfab27408fbbbbccd9e2bc89925deef71ee92f Mon Sep 17 00:00:00 2001
From: Adrian Kosmaczewski <adrian.kosmaczewski@vshn.ch>
Date: Mon, 4 Sep 2023 14:59:13 +0200
Subject: [PATCH] Fixed excessive CPU usage

---
 Dockerfile | 20 ++++++++++----------
 Guardfile  |  8 +++++++-
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 58f6f39..4a250f7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,8 @@
 FROM ghcr.io/vshn/asciidoctor-slides:1.17.0
 
-RUN addgroup -S preview && adduser -S preview -G preview
-RUN mkdir -p /presentation && chown -R preview:preview /presentation
-RUN mkdir -p /build && chown -R preview:preview /build
+RUN addgroup -S preview && adduser -S preview -G preview && \
+    mkdir -p /presentation && chown -R preview:preview /presentation && \
+    mkdir -p /build && chown -R preview:preview /build
 
 WORKDIR /build
 
@@ -10,13 +10,13 @@ WORKDIR /build
 # https://github.com/bebraven/platform/pull/82/files
 # to fix file system notification issues when running this image in a Mac
 
-RUN apk update && apk add curl unzip build-base ruby-dev ruby-rdoc libnotify
-RUN gem install guard guard-livereload guard-shell libnotify
-
-RUN curl --silent --location https://github.com/caddyserver/caddy/releases/download/v2.4.6/caddy_2.4.6_linux_amd64.tar.gz -o /build/caddy.tar.gz
-RUN tar -zxvf /build/caddy.tar.gz
-RUN mv /build/caddy /usr/local/bin/caddy
-RUN rm /build/caddy.tar.gz
+RUN apk update && apk add curl unzip build-base ruby-dev ruby-rdoc libnotify && \
+    gem install --no-document guard guard-livereload guard-shell libnotify && \
+    apk del build-base ruby-dev && \
+    curl --silent --location https://github.com/caddyserver/caddy/releases/download/v2.4.6/caddy_2.4.6_linux_amd64.tar.gz -o /build/caddy.tar.gz && \
+    tar -zxvf /build/caddy.tar.gz && \
+    mv /build/caddy /usr/local/bin/caddy && \
+    rm /build/caddy.tar.gz
 
 COPY slides-preview.sh /usr/local/bin/
 COPY signal-listener.sh /usr/local/bin/
diff --git a/Guardfile b/Guardfile
index b23f09b..2fe38d4 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,7 +1,13 @@
+# Very important!
+ignore %r{^node_modules/}
+
 group :presentation do
     # Rebuild documentation when modifying files
     guard :shell do
-        watch(/slides.adoc/) do
+        watch(/(.*).adoc/) do |a|
+            time = Time.new
+            timestring = time.strftime("%H:%M:%S")
+            puts "#{timestring} - INFO - Got change for: #{a[0]}"
             `generate-vshn-slides --filename=slides.adoc`
         end
     end