merge.sh

#!/usr/bin/env bash

set -e

SOURCE_BRANCH="develop"
TARGET_BRANCH="master"

# Pull requests and commits to other branches shouldn't try to deploy, just build to verify
if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_BRANCH" != "$SOURCE_BRANCH" ]; then
    echo "Skipping deploy; just doing a build."
    exit 0
fi

git fetch origin $TARGET_BRANCH:$TARGET_BRANCH
git checkout $TARGET_BRANCH
git merge $SOURCE_BRANCH

REPO=`git config remote.origin.url`
SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
chmod 600 deploy_key
eval `ssh-agent -s`
ssh-add deploy_key

git push $SSH_REPO $TARGET_BRANCH