bump alpine 3.8 and use buildstage type build

Dockerfile

@@ -1,28 +1,25 @@
-FROM lsiobase/alpine:3.7
+FROM lsiobase/alpine:3.7 as buildstage
+# specifically using 3.7 alpine in buildstage
+# cgo bug in 1.10x go
+# runtime stage uses 3.8 alpine
 
-# set version label
-ARG BUILD_DATE
-ARG VERSION
-LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
-LABEL maintainer="sparklyballs"
-
-# environment settings
+# build variables
 ARG SYNC_SRC="/tmp/syncthing"
 ARG SYNC_BUILD="$SYNC_SRC/src/github.com/syncthing/syncthing"
-ENV HOME="/config"
 
 RUN \
  echo "**** install build packages ****" && \
- apk add --no-cache --virtual=build-dependencies \
+ apk add --no-cache \
 	curl \
 	g++ \
 	gcc \
 	go \
-	tar && \
- echo "**** compile syncthing ****" && \
+	tar
+
+RUN \
+echo "**** fetch source code ****" && \
  mkdir -p \
 	"${SYNC_BUILD}" && \
- export GOPATH="${SYNC_SRC}" && \
  SYNC_TAG=$(curl -sX GET "https://api.github.com/repos/syncthing/syncthing/releases/latest" \
 	| awk '/tag_name/{print $4;exit}' FS='[""]') && \
  curl -o \
@@ -31,27 +28,41 @@ RUN \
  tar xf \
  /tmp/syncthing-src.tar.gz -C \
 	"${SYNC_BUILD}" --strip-components=1 && \
+ echo "**** compile syncthing  ****" && \
  cd "${SYNC_BUILD}" && \
+ export GOPATH="${SYNC_SRC}" && \
  go run build.go -no-upgrade -version=${SYNC_TAG} && \
- echo "**** install syncthing ****" && \
- install -d -o abc -g abc \
-	/var/lib/syncthing && \
+ echo "**** install syncthing to tmp folder ****" && \
+ mkdir -p \
+	/tmp/bin && \
  install -D -m755 \
 	$SYNC_BUILD/bin/syncthing \
-	/usr/bin/syncthing && \
+	/tmp/bin/syncthing && \
  for i in $(ls $SYNC_BUILD/bin); \
 	do if ! [ "$i" = "syncthing" ]; \
-	then install -Dm 755 $SYNC_BUILD/bin/$i /usr/bin/$i ; \
+	then install -Dm 755 $SYNC_BUILD/bin/$i /tmp/bin/$i ; \
 	fi; \
- done && \
- export GOPATH="" && \
- echo "**** cleanup ****" && \
- apk del --purge \
-	build-dependencies && \
- rm -rf \
-	/tmp/*
+ done
 
-# add local files
+############## runtime stage ##############
+FROM lsiobase/alpine:3.8
+
+# set version label
+ARG BUILD_DATE
+ARG VERSION
+LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
+LABEL maintainer="sparklyballs"
+
+# environment settings
+ENV HOME="/config"
+
+RUN \
+ echo "**** create var lib folder ****" && \
+ install -d -o abc -g abc \
+	/var/lib/syncthing
+
+# copy files from build stage and local files
+COPY --from=buildstage /tmp/bin/ /usr/bin/
 COPY root/ /
 
 # ports and volumes

README.md

@@ -85,6 +85,7 @@ You can find some of the best documentation available on the web at [docs.syncth
 
 ## Versions
 
++ **30.07.17:** Rebase to alpine 3.8 and use buildstage.
 + **13.12.17:** Rebase to alpine 3.7.
 + **25.10.17:** Add env for manual setting of umask.
 + **29.07.17:** Simplify build structure as symlinks failing on > 0.14.32