From b02492a1b3c38dd2a2a636260425f93320ace5b2 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 3 May 2020 09:55:55 +0200
Subject: Decrease image size

* use intermediate image for file setup
* Set version via build-arg instead of from .git
---
 Dockerfile | 51 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 35 insertions(+), 16 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 6fb8ce5..90119d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,24 @@
+# docker build -t db-fakedisplay:latest --build-arg=dbf_version=$(git describe --dirty) .
+
+FROM debian:buster-slim as files
+
+ARG dbf_version=git
+
+COPY index.pl /app/
+COPY lib/ /app/lib/
+COPY public/ /app/public/
+COPY templates/ /app/templates/
+COPY share/ /app/share/
+
+WORKDIR /app
+
+RUN ln -sf ../ext-templates/imprint.html.ep templates/imprint.html.ep \
+	&& ln -sf ../ext-templates/privacy.html.ep templates/privacy.html.ep
+
+RUN find lib -name *.pm | xargs sed -i \
+	-e "s/VERSION *= *.*;/VERSION = '${dbf_version}';/" \
+	-e "s/dbf_version *= *.*;/dbf_version = '${dbf_version}';/"
+
 FROM perl:5.30-slim
 
 ARG DEBIAN_FRONTEND=noninteractive
@@ -7,28 +28,26 @@ COPY cpanfile /app/cpanfile
 WORKDIR /app
 
 RUN apt-get update \
-	&& apt-get -y --no-install-recommends install ca-certificates curl gcc git libc6-dev libdb5.3 libdb5.3-dev libssl1.1 libssl-dev libxml2 libxml2-dev make zlib1g-dev \
+	&& apt-get -y --no-install-recommends install \
+		ca-certificates \
+		curl \
+		gcc \
+		libc6-dev \
+		libdb5.3 \
+		libdb5.3-dev \
+		libssl1.1 \
+		libssl-dev \
+		libxml2 \
+		libxml2-dev \
+		make \
+		zlib1g-dev \
 	&& cpanm -n --no-man-pages --installdeps . \
 	&& rm -rf ~/.cpanm \
 	&& apt-get -y purge curl gcc libc6-dev libdb5.3-dev libssl-dev libxml2-dev make zlib1g-dev \
 	&& apt-get -y autoremove \
-	&& apt-get -y clean \
 	&& rm -rf /var/cache/apt/* /var/lib/apt/lists/*
 
-COPY .git/ /app/.git/
-COPY lib/ /app/lib/
-COPY public/ /app/public/
-COPY templates/ /app/templates/
-COPY share/ /app/share/
-COPY index.pl /app
-
-RUN find lib -name *.pm | xargs sed -i \
-	-e "s/VERSION *= *.*;/VERSION = '$(git describe)';/" \
-	-e "s/dbf_version *= *.*;/dbf_version = '$(git describe)';/" \
-	&& rm -rf .git
-
-RUN ln -sf ../ext-templates/imprint.html.ep templates/imprint.html.ep \
-	&& ln -sf ../ext-templates/privacy.html.ep templates/privacy.html.ep
+COPY --from=files /app/ /app/
 
 EXPOSE 8092
 
-- 
cgit v1.2.3