adding pipeline logic and multi arching

Dockerfile

@@ -7,6 +7,7 @@ ARG XMLTV_VER="0.5.69"
 
 # environment settings
 ARG TZ="Europe/Oslo"
+ARG TVHEADEND_COMMIT
 ENV HOME="/config"
 
 # copy patches
@@ -29,6 +30,7 @@ RUN \
 	gettext-dev \
 	git \
 	gzip \
+	jq \
 	libcurl \
 	libdvbcsa-dev \
 	libgcrypt-dev \
@@ -144,7 +146,18 @@ RUN \
 
 RUN \
  echo "**** compile tvheadend ****" && \
- git clone https://github.com/tvheadend/tvheadend.git /tmp/tvheadend && \
+ if [ -z ${TVHEADEND_COMMIT+x} ]; then \
+	TVHEADEND_COMMIT=$(curl -sX GET https://api.github.com/repos/tvheadend/tvheadend/commits/master \
+	| jq -r '. | .sha'); \
+ fi && \
+ curl -o \
+	/tmp/tvheadend.tar.gz -L \
+	"https://github.com/tvheadend/tvheadend/archive/${TVHEADEND_COMMIT}.tar.gz" && \
+ mkdir -p \
+	/tmp/tvheadend && \
+ tar xf \
+	/tmp/tvheadend.tar.gz -C \
+	/tmp/tvheadend/ --strip-components=1 && \
  cd /tmp/tvheadend && \
  ./configure \
 	`#Encoding` \