bump to alpine 3.7 and fix continuation lines

Dockerfile

@@ -1,13 +1,13 @@
-FROM lsiobase/alpine:3.6
-MAINTAINER sparklyballs
+FROM lsiobase/alpine:3.7
 
 # set version label
 ARG BUILD_DATE
 ARG VERSION
 LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
+LABEL maintainer="sparklybals"
 
-# install build packages
 RUN \
+ echo "**** install build packages ****" && \
  apk add --no-cache --virtual=build-dependencies \
 	cmake \
 	ffmpeg-dev \
@@ -19,16 +19,15 @@ RUN \
 	make \
 	openjpeg-dev \
 	python2-dev && \
-
-# install runtime packages
+ echo "**** install runtime packages ****" && \
  apk add --no-cache \
 	curl \
 	expat \
 	ffmpeg \
 	ffmpeg-libs \
 	gdbm \
-	gst-plugins-good1 \
-	gstreamer1 \
+	gst-plugins-good \
+	gstreamer \
 	jpeg \
 	lame \
 	libffi \
@@ -41,8 +40,7 @@ RUN \
 	sqlite-libs \
 	tar \
 	wget && \
-
-# compile mp3gain
+ echo "**** compile mp3gain ****" && \
  mkdir -p \
 	/tmp/mp3gain-src && \
  curl -o \
@@ -51,10 +49,21 @@ RUN \
  cd /tmp/mp3gain-src && \
  unzip -qq /tmp/mp3gain-src/mp3gain.zip && \
  sed -i "s#/usr/local/bin#/usr/bin#g" /tmp/mp3gain-src/Makefile && \
- make && \
+ echo "**** attempt to set number of cores available for make to use ****" && \
+ set -ex && \
+ CPU_CORES=$( < /proc/cpuinfo grep -c processor ) || echo "failed cpu look up" && \
+ if echo $CPU_CORES | grep -E  -q '^[0-9]+$'; then \
+	: ;\
+ if [ "$CPU_CORES" -gt 7 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 3 )); \
+ elif [ "$CPU_CORES" -gt 5 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 2 )); \
+ elif [ "$CPU_CORES" -gt 3 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 1 )); fi \
+ else CPU_CORES="1"; fi && \
+ make -j $CPU_CORES && \
  make install && \
-
-# compile chromaprint
+ echo "**** compile chromaprint ****" && \
  git clone https://bitbucket.org/acoustid/chromaprint.git \
 	/tmp/chromaprint && \
  cd /tmp/chromaprint && \
@@ -62,10 +71,10 @@ RUN \
 	-DBUILD_TOOLS=ON \
 	-DCMAKE_BUILD_TYPE=Release \
 	-DCMAKE_INSTALL_PREFIX:PATH=/usr && \
- make && \
+ make -j $CPU_CORES && \
+ set +ex && \
  make install && \
-
-# install pip packages
+ echo "**** install pip packages ****" && \
  pip install --no-cache-dir -U \
 	beets \
 	beets-copyartifacts \
@@ -75,8 +84,7 @@ RUN \
 	pyacoustid \
 	pylast \
 	unidecode && \
-
-# cleanup
+ echo "**** cleanup ****" && \
  apk del --purge \
 	build-dependencies && \
  rm -rf \

README.md

@@ -85,6 +85,7 @@ Contains [beets-copyartifacts](https://github.com/sbarakat/beets-copyartifacts)
 
 ## Versions
 
++ **06.12.17:** Rebase to alpine linux 3.7.
 + **25.05.17:** Rebase to alpine linux 3.6.
 + **06.02.17:** Rebase to alpine linux 3.5.
 + **16.01.17:** Add packages required for replaygain.