Check if Git username is defined locally

pre-commit

#!/bin/bash

# ## Description
# This pre-commit git hook makes sure that a local username is defined if there is any remote repository on github.
# This is helpful if you are working with multiple remote hosts and use different usernames. If you forget to configure
# the local username you may end up sending a wrong username to your github remote.
#
# ## Usage
# This is script is only useful if you make it available as a hook template. To achieve this, follow these steps:
#
# 1. Tell git to copy everything in ~/.git-templates to your per-project .git/ directory when you run git init or clone
#    git config --global init.templatedir '~/.git-templates'
#
# 2. Create a directory to hold the global hooks
#    mkdir -p ~/.git-templates/hooks
#
# 3. Move this script to `~/.git-templates/hooks/pre-commit`
#    Now every time you do a `git init` or `git clone` git will copy this script to the repository and executes it
#    before the commit is done.

RED='\033[0;31m' # red color
NC='\033[0m' # no color

GITHUB_REMOTE=$(git remote -v | grep github.com)
LOCAL_USERNAME=$(git config --local user.name)

if [ -n "$GITHUB_REMOTE" ] && [ -z "$LOCAL_USERNAME" ]; then
    printf "\n${RED}ATTENTION: At least one Github remote repository is configured, but no local username. "
    printf "Please define a local username that matches your Github account.${NC} [pre-commit hook]\n\n"
    exit 1
fi