git-wt.sh

#!/bin/bash

# creates a new worktree.
# Usage: git wt [revision] [command]
# If no revision is specified, it will use the current HEAD.
#  you can use `.` as a shortcut for HEAD too.
# If no command is specified, it will open the worktree in your IDE: 
#  this is `cursor` for me, but you can change it to your favorite editor.

# Function to generate a unique worktree name
generate_worktree_name() {
    local repo_name=$(basename "$(git rev-parse --show-toplevel)")
    local date_str=$(date +%Y-%m-%d)
    local random_hash=$(head -c 4 /dev/urandom | xxd -p)
    echo "${repo_name}-${date_str}-${random_hash}"
}

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

if [ "$#" -lt 1 ]; then
    revision="HEAD"
    command="cursor ."
else
    revision=$1
    shift
    command="$*"
fi


if [[ "$revision" == "." ]]; then 
    revision="HEAD"
fi;

# Validate revision
if ! git rev-parse --verify "$revision" >/dev/null 2>&1; then
    echo "Error: Invalid revision: $revision"
    exit 1
fi

# prune old worktrees
git worktree prune

# Create temporary directory in /tmp
worktree_name=$(generate_worktree_name)
worktree_path="/tmp/$worktree_name"

# Create worktree
if ! git worktree add --detach "$worktree_path" "$revision"; then
    echo "Error: Failed to create worktree"
    exit 1
fi


# Change to worktree directory and execute command
cd "$worktree_path" || exit 1
if [[ ! -z "${command}" ]]; then 
    echo "Running command: $command"
    eval "$command"
else 
    echo "no command specified"
fi

# Provide information about the worktree
echo
echo "Worktree is ready at: $worktree_path"
echo "To remove this worktree later, run:"
echo "git worktree remove $worktree_name"