small fixes

Signed-off-by: Jess Frazelle <me@jessfraz.com>

build-all.sh

@@ -6,11 +6,9 @@ build_and_push(){
 	suite=$2
 	build_dir=$3
 
-	(
-	set -x
-	docker build --rm --force-rm -t r.j3ss.co/${base}:${suite} ${build_dir} || exit 1
-	)
+	docker build --rm --force-rm -t r.j3ss.co/${base}:${suite} ${build_dir} || return 1
 
+	# on successful build, push the image
 	echo "                       ---                                   "
 	echo "Successfully built ${base}:${suite} with context ${build_dir}"
 	echo "                       ---                                   "
@@ -30,7 +28,6 @@ build_and_push(){
 		docker tag r.j3ss.co/${base}:${suite} r.j3ss.co/${base}:latest
 		docker push --disable-content-trust=false r.j3ss.co/${base}:latest
 	fi
-
 }
 
 main(){
@@ -66,9 +63,10 @@ main(){
 done
 
 if [ ${#ERRORS[@]} -eq 0 ]; then
-    	echo "No errors, hooray"
+	echo "No errors, hooray!"
 else
-    	echo "These images failed: ${ERRORS[@]}"
+	echo "[ERROR] Some images did not build correctly, see below." >&2
+	echo "These images failed: ${ERRORS[@]}" >&2
 	exit 1
 fi
 }

t/Dockerfile

@@ -1,11 +1,16 @@
-FROM alpine:latest
+FROM ruby:2-alpine
 MAINTAINER Jessica Frazelle <jess@docker.com>
 
-RUN apk --no-cache add \
+RUN apk add --no-cache \
+	ca-certificates
+
+RUN set -x \
+        && apk add --no-cache --virtual .build-deps \
                 build-base \
-	ca-certificates \
-	ruby \
-	ruby-dev \
-	&& gem install --no-document io-console t
+        && gem install \
+                io-console \
+				t \
+                --no-rdoc --no-ri \
+        && apk del .build-deps
 
 ENTRYPOINT [ "t" ]