CI optimizations

circle.yml

@@ -3,6 +3,12 @@ machine:
     version: 4.1.0
   ruby:
     version: 2.1.2
+
+general:
+  branches:
+    only:
+      - master # ignore PRs and branches
+      
 test:
   override:
     - echo "Skipping tests for now"

scripts/git/clone.sh

@@ -13,7 +13,7 @@ function run {
 
   echo "-- Cloning $REPOSITORY#$BRANCH to $DIRECTORY..."
 
-  ARGS="--branch=${BRANCH:-master}"
+  ARGS="--branch=${BRANCH:-master} --depth=3"
   if [[ "$DEPTH" != "" ]]; then
     ARGS="$ARGS --depth=$DEPTH"
   fi