rerun.sh

#!/usr/bin/env bash

# Reruns the last command executed via run.sh in the current directory
# Shows an error message if no previous command exists

set -e

# Find the cached command for this directory
CACHE_DIR="/tmp/helix_last_command_$USER"
# Use same hash logic as run.sh (portable across macOS and Linux)
if command -v md5sum &> /dev/null; then
    PWD_HASH=$(echo -n "$PWD" | md5sum | cut -d' ' -f1)
elif command -v md5 &> /dev/null; then
    PWD_HASH=$(echo -n "$PWD" | md5)
else
    # Fallback: use base64-encoded path (less elegant but works everywhere)
    PWD_HASH=$(echo -n "$PWD" | base64 | tr -d '=\n' | tr '/' '_')
fi
CACHE_FILE="$CACHE_DIR/$PWD_HASH"

# Check if cache file exists
if [ ! -f "$CACHE_FILE" ]; then
    echo "No previous command to rerun in this directory" >&2
    exit 1
fi

# Source the cache file to get PWD and ARGS as an array
source "$CACHE_FILE"

# Change to the cached directory and re-execute run.sh
cd "$PWD"

# Re-execute run.sh with the cached arguments (ARGS is now an array)
exec "$(dirname "$0")/run.sh" "${ARGS[@]}"