# Set your identity
git config --global user.name "Your Name"
git config --global user.email "your.email@example.com"

# Set default editor
git config --global core.editor "code --wait"  # VS Code
# or
git config --global core.editor "nano"

# Enable color output
git config --global color.ui true

# Set default branch name
git config --global init.defaultBranch main

# Create and switch to new branch
git checkout -b feature-x

# Work on branch, make commits
git add .
git commit -m "Implement feature X"

# Switch back to main
git checkout main

# Merge feature branch
git merge feature-x

# Delete feature branch
git branch -d feature-x

# Fork a repository (on GitHub/GitLab)
# Clone your fork locally
git clone https://github.com/yourname/repo.git
cd repo

# Add original repo as upstream
git remote add upstream https://github.com/original/repo.git

# Create feature branch
git checkout -b feature-x

# Make changes and commit
git add .
git commit -m "Add new feature"

# Push to your fork
git push origin feature-x

# Create pull request (on GitHub/GitLab UI)

# To sync with upstream
git fetch upstream
git merge upstream/main

# Show compact history with graph
git log --oneline --graph --all

# Show changes in last commit
git show HEAD

# Show changes between two commits
git diff abc123 def456

# Find when a bug was introduced
git bisect start
git bisect bad        # Current version is bad
git bisect good abc123 # Commit abc123 is known good
# Git will checkout midpoint, you test and mark good/bad
git bisect reset      # When done

# Change last commit (before pushing)
git add forgotten-file.txt
git commit --amend --no-edit

# Undo a public commit (creates new revert commit)
git revert abc123

# Completely remove last local commit (use with caution)
git reset --hard HEAD~1

# Recover file deleted in last commit
git checkout HEAD -- deleted-file.txt

# Rebase last 3 commits interactively
git rebase -i HEAD~3

# In the editor that opens:
# - Change "pick" to "edit" to modify a commit
# - Change to "squash" to combine with previous commit
# - Change to "reword" to change commit message
# - Delete line to remove commit

# After saving, follow prompts to complete rebase

# Example pre-commit hook to run ESLint
#!/bin/sh

# Run ESLint on staged JS files
STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".js$")

if [[ "$STAGED_FILES" = "" ]]; then
  exit 0
fi

echo "Running ESLint on staged files..."
eslint $STAGED_FILES

if [[ $? != 0 ]]; then
  echo "ESLint found errors. Commit aborted."
  exit 1
fi

exit 0