Use Circle CI for faster builds. (#181)

Move to Circle CI from Travis CI.

build.sh

@@ -9,8 +9,9 @@ if [ "$1" = "dev" ]; then
 		export DEV=true
 fi
 
+REG_URL=${REGISTRY}_URL
 
-if [ "$TRAVIS_EVENT_TYPE" = "cron" ]  || [ "$DEV" = "true" ] ; then
+if [ "$EVENT_TYPE" = "cron" ]  || [ "$DEV" = "true" ] ; then
 		python -m pip install python-gitlab
 		# Get the latest commit for repositories and set their reference values to be
 		# used in the development builds.
@@ -25,23 +26,25 @@ if [ "$TRAVIS_EVENT_TYPE" = "cron" ]  || [ "$DEV" = "true" ] ; then
 		$DOCKER build -f core/Dockerfile.dev \
 						--build-arg CORE_REF=$CORE_REF \
 						--build-arg MM3_HK_REF=$MM3_HK_REF \
-						-t maxking/mailman-core:rolling core/
+						--label version.core="$CORE_REF" \
+						--label version.mm3-hk="$MM3_HK_REF" \
+						--label version.git_commit="$COMMIT_ID" \
+						-t ${!REG_URL}/maxking/mailman-core:rolling core/
 
 		# Build the mailman-web image.
 		$DOCKER build -f web/Dockerfile.dev \
+				        --label version.git_commit="$COMMIT_ID" \
+						--label version.postorius="$POSTORIUS_REF" \
+						--label version.hyperkitty="$HYPERKITTY_REF" \
+						--label version.client="$CLIENT_REF" \
+						--label version.dj-mm3="$DJ_MM3_REF" \
 						--build-arg POSTORIUS_REF=$POSTORIUS_REF \
 						--build-arg CLIENT_REF=$CLIENT_REF \
 						--build-arg HYPERKITTY_REF=$HYPERKITTY_REF \
 						--build-arg DJ_MM3_REF=$DJ_MM3_REF \
-						-t maxking/mailman-web:rolling web/
+						-t ${!REG_URL}/maxking/mailman-web:rolling web/
 else
 		# Do the normal building process.
-		if [ "$TRAVIS_BRANCH" = "master" ]; then
-				TAG="latest"
-		else
-				TAG="$TRAVIS_BRANCH"
-		fi
-
-		$DOCKER build -t maxking/mailman-core:$TAG core/
-		$DOCKER build -t maxking/mailman-web:$TAG web/
+		$DOCKER build -t ${!REG_URL}/maxking/mailman-core:$TAG core/
+		$DOCKER build -t ${!REG_URL}/maxking/mailman-web:$TAG web/
 fi