Specify the git branch code to be deployed in Elastic Beanstalk environment - ruby-on-rails

Question

Is there any way to specify which git branch code to be deployed to an Elastic Beanstalk environment?
Assume, I have two git branches named test and stage and I have an Elastic Beanstalk environment named test-env.
Now, I set the branch defaults in config.yml as below:
branch-defaults:
test:
environment: test-env
group_suffix: null
global:
application_name: test
default_ec2_keyname: abcde
default_platform: Ruby 2.2 (Puma)
default_region: us-west-2
profile: eb-cli
sc: git
Now, what I need is if I deploy from stage branch with eb deploy test-env it should automatically deploy the code from test branch or it should throw an error..
Is there any way to do it. If no please suggest me some other way to do it..
Thanks..

Answer 1

This isn't something that the EB CLI supports; it will always run a deployment from the current branch. However, it's certainly something you can script (I'm assuming you're running under bash, it wouldn't be too hard to port to Windows command shell using the for command to extract the current branch name):
deployTest.sh:
#!bin/bash
# Grab the current branch name
current=`git rev-parse --abbrev-ref HEAD`
# Just in case we have any in-flight work, stash it
git stash
# Switch to 'test' branch
git checkout test
# Deploy to test-env
eb deploy test-env
# Switch back to whatever branchwe were on
git checkout $current
# Restore in-flight work
git stash pop