Update config.yml

Author: schickling

.circleci/config.yml

@@ -19,13 +19,16 @@ jobs:
       - checkout
       - run: sudo npm i -g yarn
       - run: |
-          security create-keychain -p travis build.keychain
-          security default-keychain -s build.keychain
-          security unlock-keychain -p travis build.keychain
-          echo $CERTIFICATE_OSX_P12 | base64 --decode > certificate.p12
-          security import certificate.p12 -k build.keychain -P $CERTIFICATE_OSX_PASSWORD -T /usr/bin/codesign
-          # needed for signing in CI environments (don't ask...)
-          security set-key-partition-list -S apple-tool:,apple: -s -k travis build.keychain
+          if [[ -z "$CIRCLE_PULL_REQUEST" && "$CIRCLE_BRANCH" == "master" ]]
+          then
+            security create-keychain -p travis build.keychain
+            security default-keychain -s build.keychain
+            security unlock-keychain -p travis build.keychain
+            echo $CERTIFICATE_OSX_P12 | base64 --decode > certificate.p12
+            security import certificate.p12 -k build.keychain -P $CERTIFICATE_OSX_PASSWORD -T /usr/bin/codesign
+            # needed for signing in CI environments (don't ask...)
+            security set-key-partition-list -S apple-tool:,apple: -s -k travis build.keychain
+          fi
       - run: sudo npm i -g yarn
       # needed for release process
       - run: brew install gettext