From d3f62143256cfffbd0f175d90c16d012ba3f483a Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Mon, 30 Dec 2019 00:11:18 +0300
Subject: dump1090: slimmer image

* Use stretch-slim instead of stretch.
* Remove build dependencies & the build files.
---
 dump1090/Dockerfile | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/dump1090/Dockerfile b/dump1090/Dockerfile
index 578f73c..7c6f4ed 100644
--- a/dump1090/Dockerfile
+++ b/dump1090/Dockerfile
@@ -1,17 +1,7 @@
-FROM debian:stretch
+FROM debian:stretch-slim
 
 LABEL maintainer="Egor Tensin <Egor.Tensin@gmail.com>"
 
-# Don't prompt:
-ENV DEBIAN_FRONTEND=noninteractive
-
-RUN apt-get update -yq \
-    && apt-get install -yq --no-install-recommends \
-        # dump1090 dependencies (from README at https://github.com/flightaware/dump1090):
-        build-essential debhelper librtlsdr-dev pkg-config dh-systemd libncurses5-dev libbladerf-dev \
-        # Supervisor to run both lighttpd and dump1090:
-        supervisor
-
 # Build and install the dump1090-fa package:
 WORKDIR /tmp
 
@@ -21,11 +11,26 @@ ARG DUMP1090_ARCH=armhf
 
 ADD ["https://github.com/flightaware/dump1090/archive/v${DUMP1090_VERSION}.tar.gz", "./dump1090-${DUMP1090_VERSION}.tar.gz"]
 
-RUN tar xzf dump1090-${DUMP1090_VERSION}.tar.gz && \
-    cd dump1090-${DUMP1090_VERSION} && \
+# Don't prompt:
+ENV DEBIAN_FRONTEND=noninteractive
+
+    # dump1090 dependencies (from README at https://github.com/flightaware/dump1090):
+RUN build_deps='build-essential debhelper librtlsdr-dev pkg-config dh-systemd libncurses5-dev libbladerf-dev' && \
+    # dump1090-fa runtime dependencies:
+    runtime_deps='librtlsdr0 libncurses5 libbladerf1' && \
+    # Supervisor to run both dump1090-fa and lighttpd:
+    supervisor='supervisor' && \
+    apt-get update -yq && \
+    apt-get install -yq --no-install-recommends $build_deps $runtime_deps $supervisor && \
+    tar xzf dump1090-${DUMP1090_VERSION}.tar.gz && \
+    cd -- dump1090-${DUMP1090_VERSION} && \
     dpkg-buildpackage -b && \
     dpkg-buildpackage -Tclean && \
-    apt-get install -yq ../dump1090-fa_${DUMP1090_VERSION}_${DUMP1090_ARCH}.deb
+    cd -- .. && \
+    apt-get install -yq ./dump1090-fa_${DUMP1090_VERSION}_${DUMP1090_ARCH}.deb && \
+    rm -rf -- dump1090-${DUMP1090_VERSION}.tar.gz dump1090-${DUMP1090_VERSION}/ && \
+    find . -mindepth 1 -maxdepth 1 -type f -\( -name '*.buildinfo' -o -name '*.changes' -o -name '*.deb' -\) -delete && \
+    apt-get purge -yq --auto-remove -o APT::AutoRemove::RecommendsImportant=false $build_deps
 
 # Create the /run/dump1090-fa directory, typically created by systemd:
 RUN mkdir --mode=0755 /run/dump1090-fa
-- 
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