install

#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'
dimmed=$'\e[2m'
bold=$(tput bold)
cyan=$'\e[96m'
normal=$(tput sgr0)

SCRIPT_NAME="ks"
SCRIPT_DOWNLOAD_URL="https://raw.githubusercontent.com/loteoo/ks/main/ks"
REQUIRES_RESTART="false"
SYSTEM_BIN_PATH="/usr/local/bin"
LOCAL_BIN_PATH="$HOME/.local/bin"
KEYCHAIN="${KS_DEFAULT_KEYCHAIN:-Secrets}"
KEYCHAIN_FILE="$KEYCHAIN.keychain"

info() {
  # shellcheck disable=SC2145
  echo "${dimmed}$@${normal}" 1>&2
}

success() {
  # shellcheck disable=SC2145
  echo "${cyan}==> $@${normal}"
}

throw() {
  echo "$@" 1>&2
  exit 1
}

yn() {
  read -r -n 1 -p "$1 [y/n]: " yn
  echo
  if [[ "$yn" != [Yy]* ]]; then
    return 1
  fi
}

# Validate macOS
if [[ "$OSTYPE" != "darwin"* ]]; then
  throw "Unfortunately $SCRIPT_NAME is for macOS only as it relies on it's native keychain features. Installation aborted."
else
  info "✓ On macOS."
fi

# Validate security command
if ! command -v security &> /dev/null; then
  throw "\"security\" command not available. Installation aborted."
else
  info "✓ \"security\" is available."
fi

# Warn reinstall
if command -v $SCRIPT_NAME &> /dev/null; then
  if ! yn "$SCRIPT_NAME already exists. Remove and reinstall?"; then
    throw "Installation aborted."
  fi
  existing="$(which $SCRIPT_NAME)"
  rm "$existing"
  success "Removed old install."
fi


echo "Select install location:
  1) Local: For $USER user only. Location: $LOCAL_BIN_PATH.
  2) System: For whole system. Location: $SYSTEM_BIN_PATH. Requires sudo."
read -r -n 1 -p "Pick one: " num
echo
case "$num" in
  1) BIN_PATH="$LOCAL_BIN_PATH";;
  2) BIN_PATH="$SYSTEM_BIN_PATH";;
  *) throw "Invalid choice.";;
esac

# Create bin directory if needed.
if [[ ! -d "$BIN_PATH" ]]; then
  if ! yn "Need to create $BIN_PATH. Continue?"; then
    throw "Installation aborted."
  fi
  mkdir -p "$BIN_PATH"
  success "Created $BIN_PATH folder."
else
  info "✓ Directory exists."
fi

# Add to bin directory to $PATH if needed.
if ! echo "$PATH" | tr ':' $'\n' | grep -q "$BIN_PATH"; then
  if ! yn "$BIN_PATH has not been added to \$PATH. Add to path? (requires sudo privileges)"; then
    throw "Installation aborted."
  fi
  sudo bash -c "echo '$BIN_PATH' >> /etc/paths"
  REQUIRES_RESTART="true"
  success "$BIN_PATH was added to \$PATH."
else
  info "✓ Directory is in \$PATH."
fi

SCRIPT_PATH="$BIN_PATH/$SCRIPT_NAME"

info "Downloading $SCRIPT_DOWNLOAD_URL..."
curl -fsSL "$SCRIPT_DOWNLOAD_URL" -o "$SCRIPT_PATH"
success "Script added under $SCRIPT_PATH"

if [[ ! -x "$SCRIPT_PATH" ]]; then
  chmod +x "$SCRIPT_PATH"
  success "Script made executable."
else
  info "✓ Script is executable."
fi

if [[ "$REQUIRES_RESTART" == "true" ]]; then
  echo "${bold}Done! 🎉${normal}"
  echo "Please restart your terminal to make $SCRIPT_NAME available, then run \"$SCRIPT_NAME init\"."
  info "Give $SCRIPT_NAME it a star on Github if you like it! 🙏"
  exit
fi

if ! security show-keychain-info "$KEYCHAIN_FILE" > /dev/null 2>&1; then
  $SCRIPT_NAME init
else
  info "✓ Keychain \"$KEYCHAIN\" exists."
fi

info "Give $SCRIPT_NAME it a star on Github if you like it! 🙏"
echo "${bold}Installation completed! 🎉${normal}"
info "Running \"$SCRIPT_NAME help\"."
eval "$SCRIPT_NAME help"