git commit hook ensuring the correct branch URL is set for Travis badges found in README files. Install both as post-commit and post-merge hooks

gistfile1.txt

#!/bin/sh
 
# Repository settings
REPOSITORY_NAME="YourRepositoryName"
README_FILE_NAME="README.markdown"

# Update a Travis badge URL found in the README to keep it in sync with the branch name
# Badge example:
#   [![Build Status](https://img.shields.io/travis/$USER_NAME/$REPOSITORY_NAME/master.svg?style=flat)](https://travis-ci.org/$USER_NAME/$REPOSITORY_NAME)
branch_name=`git symbolic-ref --short HEAD`
sed -E -i "" "s|(^.*https://img.shields.io/travis.*/$REPOSITORY_NAME/).*(\.svg.*$)|\1$branch_name\2|g" "$README_FILE_NAME"
git add "$README_FILE_NAME"
git commit -m "Update Travis badge for branch $branch_name"