Keep master safe.

pre-push

#!/bin/bash
# Prompt before pushing to master. If it's a force push or delete, bail
# Don't be overly reliant on this, though; I'm not sure what the corner cases are.
# As usual, put this is .git/hooks directory, and make it executable with "chmod 755 pre-push"
# Requires git >= 1.8.3

PROT_BRANCH='master'
UNSAFE='force|delete|\-f'

CONFIRM_MSG="Pushing to master - are you absolutely sure you want to continue?"

COMMAND=$(ps -ocommand= -p $PPID)

abort() {
 echo "  Unsafe action:"
 echo "\t" $COMMAND
 echo "On branch master. Aborting push..."
 exit 1
}

confirm() {
    echo $CONFIRM_MSG
    read -p "Confirm: [y/n]" -n 1
    echo ""
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        exit 1
    fi
}


exec < /dev/tty


if [[ $(git rev-parse --abbrev-ref HEAD) == $PROT_BRANCH ]]; then
    if [[ $COMMAND =~ $UNSAFE ]]; then
        abort
    else
        confirm
    fi
fi