git pre-push hook: get warned before pushing to git master branch

gistfile1.sh

#!/bin/bash
# Warn before pushing to protected branches
# Make script executable with chmod +x pre-push
# Bypass with git push --no-verify

BRANCH=`git rev-parse --abbrev-ref HEAD`
PROTECTED_BRANCHES="^(master|dev|release-*|patch-*)"

if [[ "$BRANCH" =~ $PROTECTED_BRANCHES ]]; then
  read -p "Are you sure you want to push to \"$BRANCH\" ? (y/n): " -n 1 -r < /dev/tty
  echo
  if [[ $REPLY =~ ^[Yy]$ ]]; then
    exit 0
  fi
  echo "Push aborted."
  exit 1
fi
exit 0

The idea is great but the script is not working as explained.
The $BRANCH is the branch that has been checked out locally, not the one at origin. Also doing push --all the protected branches get pushed without confirmation message, a bit more refinement on the code would do it ;-)

This code is dirty (I don't know how to factorise on shell...) but it takes in count all cases.

(when checkedout at master)
git push

(when checkedout at a not restricted branch)
git push origin master

(when checkedout at a not restricted branch)
git push --all

!/bin/bash

protected_branch='master'
current_branch=$(git symbolic-ref HEAD | sed -e 's,./(.),\1,')

if [ $protected_branch = $current_branch ]
then
read -p "You're about to push master, is that what you intended? [y|n] " -n 1 -r < /dev/tty
echo
if echo $REPLY | grep -E '^[Yy]$' > /dev/null
then

BRANCH=git rev-parse --abbrev-ref HEAD
PROTECTED_BRANCHES="^(master|dev|release-|patch-)"

if [[ "$BRANCH" =~ $PROTECTED_BRANCHES ]]; then
read -p "Are you sure you want to push to "$BRANCH" ? (y/n): " -n 1 -r < /dev/tty
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
exit 0
fi
echo "Push aborted."
exit 1
fi

    exit 0 # push will execute
fi
exit 1 # push will not execute

else

BRANCH=git rev-parse --abbrev-ref HEAD
PROTECTED_BRANCHES="^(master|dev|release-|patch-)"

if [[ "$BRANCH" =~ $PROTECTED_BRANCHES ]]; then
read -p "Are you sure you want to push to "$BRANCH" ? (y/n): " -n 1 -r < /dev/tty
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
exit 0
fi
echo "Push aborted."
exit 1
fi

exit 0 # push will execute

fi

That's a good point @sgarciafer. I almost never git push --all so I didn't come across that issue.