parallel

Signed-off-by: Jess Frazelle <acidburn@google.com>

build-all.sh

@@ -3,6 +3,8 @@ set -e
 set -o pipefail
 
 REPO_URL="${REPO_URL:-r.j3ss.co}"
+JOBS=${JOBS:-2}
+export REPO_URL
 
 build_and_push(){
 	base=$1
@@ -33,16 +35,10 @@ build_and_push(){
 		docker push --disable-content-trust=false ${REPO_URL}/${base}:latest
 	fi
 }
+export -f build_and_push
 
-main(){
-	# get the dockerfiles
-	IFS=$'\n'
-	files=( $(find . -iname '*Dockerfile' | sed 's|./||' | sort) )
-	unset IFS
-
-	ERRORS=()
-	# build all dockerfiles
-	for f in "${files[@]}"; do
+dofile() {
+	f=$1
 	image=${f%Dockerfile}
 	base=${image%%\/*}
 	build_dir=$(dirname $f)
@@ -56,19 +52,31 @@ main(){
 		build_and_push "${base}" "${suite}" "${build_dir}"
 	} || {
 	# add to errors
-		ERRORS+=("${base}:${suite}")
-	}
-	echo
-	echo
-done
+	export ERRORS="${ERRORS} ${base}:${suite} "
+}
+echo
+echo
+}
+export -f dofile
 
-if [ ${#ERRORS[@]} -eq 0 ]; then
+main(){
+	# get the dockerfiles
+	IFS=$'\n'
+	files=( $(find . -iname '*Dockerfile' | sed 's|./||' | sort) )
+	unset IFS
+
+	export ERRORS=""
+	# build all dockerfiles
+	echo "Running in parallel with ${JOBS} jobs."
+	parallel -j"${JOBS}" dofile "{1}" ::: "${files[@]}"
+
+	if [[ "$ERRORS" == "" ]]; then
 		echo "No errors, hooray!"
-else
+	else
 		echo "[ERROR] Some images did not build correctly, see below." >&2
 		echo "These images failed: ${ERRORS[@]}" >&2
 		exit 1
-fi
+	fi
 }
 
 main $@