From 61db56778bf682f0c52118a4e97e168d729ba799 Mon Sep 17 00:00:00 2001
From: Tom Wilkie <tomwilkie@users.noreply.github.com>
Date: Fri, 14 Dec 2018 13:41:42 -0800
Subject: [PATCH] Don't push docker images on forks. (#111)

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
---
 .circleci/config.yml | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 48bb06d7aa..9fe6baa494 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,6 +12,9 @@ workflows:
         - test
         - build
         - lint
+        filters:
+          branches:
+            only: master
     - publish-master:
         requires:
         - test
@@ -103,8 +106,10 @@ jobs:
       - run:
           name: Push Images
           command: |
-            docker login -u "$DOCKER_USER" -p "$DOCKER_PASS" &&
-            make push-images
+            if [ -n "$DOCKER_USER" ]; then
+              docker login -u "$DOCKER_USER" -p "$DOCKER_PASS" &&
+              make push-images
+            fi
 
   publish-master:
     <<: *defaults