Automation for git release, will merge stage to main, ask for tag, create it and deploy

release.sh

#!/bin/bash

# Check version
if [ -z "$1" ]; then
  git fetch --tags >/dev/null 2>&1
  LATEST_TAG="$(git tag --sort=-v:refname | head -n1)"
  if [[ -n "$LATEST_TAG" ]]; then
    echo "📌 Current latest tag: $LATEST_TAG"
  else
    echo "⚠️  No tags found in this repository."
  fi
  read -p "Version to release (eg. 1.2.3): " VERSION
  if [[ -z "$VERSION" ]]; then
    echo "❌ No version provided. Aborting."
    exit 1
  fi
else
  VERSION=$1
fi

# Switch to stage and pull changes
git checkout stage || exit 1
git pull origin stage || exit 1

# Check if main has commits that are not on stage
if git rev-list --left-right stage...main | grep "^>"; then
  echo "❌ Warning: main is ahead stage!"
  read -p "Are you sure to proceed? (y/n) " CONFIRM
  if [ "$CONFIRM" != "y" ]; then
    echo "Canceled."
    exit 1
  fi
fi

# Merge stage into main without auto commit
git checkout main || exit 1
git pull origin main || exit 1

# Show diff commits between main and stage
echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "📋 Commits to release (stage → main):"
echo ""
git log --oneline main..stage
echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""
read -p "Proceed with release $VERSION? (y/n) " RELEASE_CONFIRM
if [ "$RELEASE_CONFIRM" != "y" ]; then
  echo "Canceled. Switching back to stage."
  git checkout stage
  exit 1
fi

# Merge stage into main without auto commit
git merge stage --no-commit || exit 1

# Create a release tag
git tag -a "$VERSION" -m "Release $VERSION" || exit 1

# Push changes
git push origin main --follow-tags || exit 1

echo "✅ Release $VERSION has been deployed!"

# 1. Add script to bin globally:
# sudo mv release.sh /usr/local/bin/release
# sudo chmod +x /usr/local/bin/release
# Usage: release 1.2.3

# 2. Second option: Alis in .bashrc or .zshrc
# BASH:
# echo 'alias release="bash /path/to/release.sh"' >> ~/.bashrc
# source ~/.bashrc
# ZSH:
# echo 'alias release="bash /path/to/release.sh"' >> ~/.zshrc
# source ~/.zshrc