Add support for custom local branch names

Author: jovrtn

README.md

@@ -37,6 +37,7 @@ action "Git Push to Production" {
 | Name | Type  | Usage |
 |-|-|-|
 | `WPENGINE_ENVIRONMENT` | Environment Variable  | Defaults to `production`. You shouldn't need to change this, but if you're using WP Engine's legacy staging, you can override the default and set to `staging` if needed. |
+| `LOCAL_BRANCH` | Environment Variable  | Set which branch in your repository you'd like to push to WP Engine. Defaults to `master`. |
 
 ### Further reading
 

entrypoint.sh

@@ -13,6 +13,8 @@ WPENGINE_SSH_KEY_PRIVATE_PATH="$SSH_PATH/wpengine_key"
 WPENGINE_SSH_KEY_PUBLIC_PATH="$SSH_PATH/wpengine_key.pub"
 WPENGINE_ENVIRONMENT_DEFAULT="production"
 WPENGINE_ENV=${WPENGINE_ENVIRONMENT:-$WPENGINE_ENVIRONMENT_DEFAULT}
+LOCAL_BRANCH_DEFAULT="master"
+BRANCH=${LOCAL_BRANCH:-$LOCAL_BRANCH_DEFAULT}
 
 mkdir "$SSH_PATH"
 
@@ -28,4 +30,4 @@ chmod 644 "$WPENGINE_SSH_KEY_PUBLIC_PATH"
 
 git config core.sshCommand "ssh -i $WPENGINE_SSH_KEY_PRIVATE_PATH -o UserKnownHostsFile=$KNOWN_HOSTS_PATH"
 git remote add $WPENGINE_ENV git@$WPENGINE_HOST:$WPENGINE_ENV/$WPENGINE_ENVIRONMENT_NAME.git
-git push -fu $WPENGINE_ENV master
+git push -fu $WPENGINE_ENV $BRANCH:master