install

#!/usr/bin/env bash
set -euo pipefail

# Installs extensions from this repo onto the current machine using rsync.
# Default target: ~/.pi/agent/extensions
# Override with: PI_EXTENSIONS_DIR=/some/path ./install

usage() {
  cat <<'EOF'
Usage: ./install

This installer always requires interactive confirmation.
EOF
}

if [[ $# -gt 0 ]]; then
  case "$1" in
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Error: unknown option: $1" >&2
      usage >&2
      exit 1
      ;;
  esac
fi

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SRC_ROOT="$SCRIPT_DIR/extensions"
DEST_ROOT="${PI_EXTENSIONS_DIR:-$HOME/.pi/agent/extensions}"

if [[ ! -d "$SRC_ROOT" ]]; then
  echo "Error: source extensions directory not found: $SRC_ROOT" >&2
  exit 1
fi

PKG_MGR=""
PKG_INSTALL_CMD=()

if command -v bun >/dev/null 2>&1; then
  PKG_MGR="bun"
  PKG_INSTALL_CMD=(bun install)
elif command -v pnpm >/dev/null 2>&1; then
  PKG_MGR="pnpm"
  PKG_INSTALL_CMD=(pnpm install)
elif command -v npm >/dev/null 2>&1; then
  PKG_MGR="npm"
  PKG_INSTALL_CMD=(npm install)
else
  echo "Error: no package manager found in PATH." >&2
  echo "Install one of: bun (preferred), pnpm, npm" >&2
  exit 1
fi

echo "Target extension directory: $DEST_ROOT"
echo "Using package manager: $PKG_MGR"
echo "Warning: rsync uses --delete and may remove files under each extension target."

if [[ ! -t 0 ]]; then
  echo "Error: confirmation required but no interactive stdin detected." >&2
  echo "Run ./install from an interactive terminal session." >&2
  exit 1
fi

read -r -p "Continue and sync into this directory? [y/N] " confirm
if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
  echo "Aborted."
  exit 1
fi

mkdir -p "$DEST_ROOT"

# Install status-bar first because other extensions depend on it.
extensions=(
  "status-bar"
  "no-reflection"
  "switch-thinking"
  "safe-mode"
  "repo-stats"
  "skill-stats"
  "http"
  "interactive-bash"
  "pi-ui"
  "sqlite"
  "save"
  "prompt-stash"
  "git"
  "pi-nvim"
)

installed_extensions=()

echo "Installing extensions into: $DEST_ROOT"
for ext in "${extensions[@]}"; do
  src="$SRC_ROOT/$ext/"
  dest="$DEST_ROOT/$ext/"

  if [[ ! -d "$src" ]]; then
    echo "Skipping missing extension: $ext"
    continue
  fi

  echo "- $ext"
  rsync -a --delete "$src" "$dest"
  installed_extensions+=("$ext")
done

echo "Installing extension dependencies with $PKG_MGR..."
for ext in "${installed_extensions[@]}"; do
  ext_dir="$DEST_ROOT/$ext"

  if [[ ! -d "$ext_dir" ]]; then
    echo "Skipping missing destination directory: $ext_dir"
    continue
  fi

  if [[ ! -f "$ext_dir/package.json" ]]; then
    echo "- $ext: skipping dependency install (no package.json)"
    continue
  fi

  echo "- $ext: ${PKG_INSTALL_CMD[*]}"
  (
    cd "$ext_dir"
    "${PKG_INSTALL_CMD[@]}"
  )
done

echo "Done. Extensions synced and dependencies installed. Reload pi to apply updates (/reload)."