snap: add travis_snapcraft.cfg encyrpted macaron file to deploy to the store

This allows to automatically deploy on ubuntu store.
Macaron can only be decrypted using the snapcraft keys defined in travis.

.travis.yml

@@ -11,8 +11,8 @@ env:
   - DOCKER_IMAGE=ubuntu:xenial
   - SNAP_PRIME_ON_PULL_REQUEST=true
   - SNAP_DEPLOY_CHANNEL=edge
-  - SNAPCRAFT_CONFIG_KEY=''
-  - SNAPCRAFT_CONFIG_IV=''
+  - SNAPCRAFT_CONFIG_KEY=$encrypted_ad766d8d4221_key
+  - SNAPCRAFT_CONFIG_IV=$encrypted_ad766d8d4221_iv
 
   matrix:
   - BUILD_TYPE=appimage

linux/travis-build.sh

@@ -61,15 +61,17 @@ elif [ "$BUILD_TYPE" == "snap" ]; then
             exec $0 snap_transfer_deploy
         fi
     elif [ "$TRAVIS_BUILD_STEP" == "snap_store_deploy" ]; then
+        sudo mkdir -p $THIS_PATH/.snapcraft -m 777
         set +x
         openssl aes-256-cbc -K $SNAPCRAFT_CONFIG_KEY \
             -iv $SNAPCRAFT_CONFIG_IV \
-            -in $THIS_PATH/snap/.snapcraft/travis_snapcraft.cfg \
-            -out $THIS_PATH/snap/.snapcraft/snapcraft.cfg -d
+            -in $THIS_PATH/travis_snapcraft.cfg \
+            -out $THIS_PATH/.snapcraft/snapcraft.cfg -d
         set -x
 
         ls $THIS_PATH/*.snap &> /dev/null || docker_exec snapcraft
-        docker_exec snapcraft push *.snap --release edge
+        snap=$(ls $THIS_PATH/*.snap -1 | head -n1)
+        docker_exec snapcraft push $snap --release edge
     elif [ "$TRAVIS_BUILD_STEP" == "snap_github_release" ]; then
         ls $THIS_PATH/*.snap &> /dev/null || docker_exec snapcraft
         snap=$(ls $THIS_PATH/*.snap -1 | head -n1)