Git Worktree Creator

gistfile1.txt

#!/bin/zsh
#
# gwt - Git Worktree Creator with Virtual Environment Copying
#
# Creates a git worktree for a branch, copies gitignored virtual environments
# (.venv and node_modules), and starts Claude Code in the new worktree.
#
# Usage: gwt <branch-name>
#

if [ $# -eq 0 ]; then
  echo "Usage: gwt <branch-name>"
  echo ""
  echo "Creates a git worktree, copies virtual environments, and starts Claude Code"
  echo ""
  echo "Example:"
  echo "  gwt feature/new-api    # Creates worktree for feature/new-api branch"
  return 1
fi

branch_name="$1"
current_dir="$(pwd)"

# Check if we're in a git repo
if ! git rev-parse --git-dir > /dev/null 2>&1; then
  echo "Error: Not in a git repository"
  return 1
fi

# Get the root of the git repo
repo_root="$(git rev-parse --show-toplevel)"
repo_name="$(basename "$repo_root")"

# Determine worktree directory (sibling to current repo)
worktree_path="${repo_root}/../${repo_name}-${branch_name}"

# Check if branch exists, if not create it
if ! git rev-parse --verify "$branch_name" > /dev/null 2>&1; then
  echo "Branch '$branch_name' doesn't exist. Creating it..."
  git branch "$branch_name"
fi

# Create the worktree
echo "Creating worktree at: $worktree_path"
if ! git worktree add "$worktree_path" "$branch_name"; then
  echo "Error: Failed to create worktree"
  return 1
fi

# Copy virtual environments
echo ""
echo "Copying virtual environments..."

if [ -d "$repo_root/.venv" ]; then
  echo "  → Copying .venv..."
  cp -R "$repo_root/.venv" "$worktree_path/.venv"
fi

if [ -d "$repo_root/node_modules" ]; then
  echo "  → Copying node_modules..."
  cp -R "$repo_root/node_modules" "$worktree_path/node_modules"
fi

echo ""
echo "✓ Worktree created successfully!"
echo "✓ Starting Claude Code in $worktree_path"
echo ""

# Change to directory and start claude
cd "$worktree_path" && claude

# After claude exits, return to original directory
cd "$current_dir"