deps.sh

#!/usr/bin/env bash

set -euo pipefail

# Change into Firedancer root directory
cd "$(dirname "${BASH_SOURCE[0]}")"

# Fix pkg-config path and environment
# shellcheck source=./activate-opt
source activate-opt

# Load OS information
OS="$(uname -s)"
case "$OS" in
  Darwin)
    MAKE=( make -j )
    ID=macos
    ;;
  Linux)
    MAKE=( make -j )
    # Load distro information
    if [[ -f /etc/os-release ]]; then
      source /etc/os-release
    fi
    ;;
  *)
    echo "[!] Unsupported OS $OS"
    ;;
esac

# Figure out how to escalate privileges
SUDO=""
if [[ ! "$(id -u)" -eq "0" ]]; then
  SUDO="sudo "
fi

# Install prefix
PREFIX="$(pwd)/opt"

help () {
cat <<EOF

  Usage: $0 [cmd] [args...]

  If cmd is ommitted, default is 'install'.

  Commands are:

    help
    - Prints this message

    check
    - Runs system requirement checks for dep build/install
    - Exits with code 0 on success

    nuke
    - Get rid of dependency checkouts
    - Get rid of all third party dependency files
    - Same as 'rm -rf $(pwd)/opt'

    fetch
    - Fetches dependencies from Git repos into $(pwd)/opt/git

    install
    - Runs 'fetch'
    - Runs 'check'
    - Builds dependencies
    - Installs all project dependencies into prefix $(pwd)/opt

EOF
  exit 0
}

nuke () {
  rm -rf ./opt
  echo "[-] Nuked $(pwd)/opt"
  exit 0
}

checkout_repo () {
  # Skip if dir already exists
  if [[ -d ./opt/git/"$1" ]]; then
    echo "[~] Skipping $1 fetch as \"$(pwd)/opt/git/$1\" already exists"
  else
    echo "[+] Cloning $1 from $2"
    git -c advice.detachedHead=false clone "$2" "./opt/git/$1" --branch "$3" --depth=1
  fi
  echo

  echo "[~] Checking out $1 $3"
  (
    cd ./opt/git/"$1"
    git fetch origin "$3" --depth=1
    git -c advice.detachedHead=false checkout "$3"
  )
  echo
}

fetch () {
  mkdir -pv ./opt/git

  checkout_repo zlib    https://github.com/madler/zlib     "v1.2.13"
  checkout_repo zstd    https://github.com/facebook/zstd   "v1.5.4"
  checkout_repo openssl https://github.com/quictls/openssl "OpenSSL_1_1_1t-quic1"
}

check_fedora_pkgs () {
  local REQUIRED_RPMS=( perl autoconf gettext-devel automake flex bison )

  echo "[~] Checking for required RPM packages"

  local MISSING_RPMS=( )
  for rpm in "${REQUIRED_RPMS[@]}"; do
    if ! rpm -q "$rpm" >/dev/null; then
      MISSING_RPMS+=( "$rpm" )
    fi
  done

  if [[ "${#MISSING_RPMS[@]}" -eq 0 ]]; then
    echo "[~] OK: RPM packages required for build are installed"
    return 0
  fi

  echo "[!] Found missing packages"
  echo "[?] This is fixed by the following command:"
  echo "        ${SUDO}dnf install -y ${MISSING_RPMS[*]}"
  read -r -p "[?] Install missing packages with superuser privileges? (y/N) " choice
  case "$choice" in
    y|Y)
      echo "[+] Installing missing RPMs"
      ${SUDO}dnf install -y "${MISSING_RPMS[@]}"
      echo "[+] Installed missing RPMs"
      ;;
    *)
      echo "[-] Skipping package install"
      ;;
  esac
}

check_debian_pkgs () {
  local REQUIRED_DEBS=( perl autoconf gettext automake autopoint flex bison build-essential pkg-config gcc-multilib )

  echo "[~] Checking for required DEB packages"

  local MISSING_DEBS=( )
  for deb in "${REQUIRED_DEBS[@]}"; do
    if ! dpkg -s "$deb" >/dev/null 2>/dev/null; then
      MISSING_DEBS+=( "$deb" )
    fi
  done

  if [[ ${#MISSING_DEBS[@]} -eq 0 ]]; then
    echo "[~] OK: DEB packages required for build are installed"
    return 0
  fi

  echo "[!] Found missing packages"
  echo "[?] This is fixed by the following command:"
  echo "        ${SUDO}apt-get install -y ${MISSING_DEBS[*]}"
  read -r -p "[?] Install missing packages with superuser privileges? (y/N) " choice
  case "$choice" in
    y|Y)
      echo "[+] Installing missing DEBs"
      ${SUDO}apt-get install -y "${MISSING_DEBS[@]}"
      echo "[+] Installed missing DEBs"
      ;;
    *)
      echo "[-] Skipping package install"
      ;;
  esac
}

check_alpine_pkgs () {
  local REQUIRED_APKS=( perl autoconf gettext automake flex bison build-base pkgconf )

  echo "[~] Checking for required APK packages"

  local MISSING_APKS=( )
  for deb in "${REQUIRED_APKS[@]}"; do
    if ! apk info -e "$deb" >/dev/null; then
      MISSING_APKS+=( "$deb" )
    fi
  done

  if [[ ${#MISSING_APKS[@]} -eq 0 ]]; then
    echo "[~] OK: APK packages required for build are installed"
    return 0
  fi

  echo "[!] Found missing packages"
  echo "[?] This is fixed by the following command:"
  echo "        ${SUDO}apk add ${MISSING_APKS[*]}"
  read -r -p "[?] Install missing packages with superuser privileges? (y/N) " choice
  case "$choice" in
    y|Y)
      echo "[+] Installing missing APKs"
      ${SUDO}apk add "${MISSING_APKS[@]}"
      echo "[+] Installed missing APKs"
      ;;
    *)
      echo "[-] Skipping package install"
      ;;
  esac
}

check_macos_pkgs () {
  local REQUIRED_FORMULAE=( perl autoconf gettext automake flex bison pkg-config )

  echo "[~] Checking for required brew formulae"

  local MISSING_FORMULAE=( )
  for formula in "${REQUIRED_FORMULAE[@]}"; do
    if [[ ! -d "/usr/local/Cellar/$formula" ]]; then
      MISSING_FORMULAE+=( "$formula" )
    fi
  done

  if [[ ${#MISSING_FORMULAE[@]} -eq 0 ]]; then
    echo "[~] OK: brew formulae required for build are installed"
    return 0
  fi

  echo "[!] Found missing formulae"
  echo "[?] This is fixed by the following command:"
  echo "        brew install ${MISSING_FORMULAE[*]}"
  read -r -p "[?] Install missing formulae with brew? (y/N) " choice
  case "$choice" in
    y|Y)
      echo "[+] Installing missing formulae"
      brew install "${MISSING_FORMULAE[@]}"
      echo "[+] Installed missing formulae"
      ;;
    *)
      echo "[-] Skipping formula install"
      ;;
  esac
}

check () {
  DISTRO="${ID_LIKE:-${ID:-}}"
  case "$DISTRO" in
    fedora)
      check_fedora_pkgs
      ;;
    debian)
      check_debian_pkgs
      ;;
    alpine)
      check_alpine_pkgs
      ;;
    macos)
      check_macos_pkgs
      ;;
    *)
      echo "Unsupported distro $DISTRO. Your mileage may vary."
      ;;
  esac
}

install_zlib () {
  if pkg-config --exists zlib; then
    echo "[~] zlib already installed at $(pkg-config --path zlib), skipping installation"
    return 0
  fi

  cd ./opt/git/zlib

  echo "[+] Configuring zlib"
  ./configure \
    --prefix="$PREFIX"
  echo "[+] Configured zlib"

  echo "[+] Building zlib"
  "${MAKE[@]}" libz.a
  echo "[+] Successfully built zlib"

  echo "[+] Installing zlib to $PREFIX"
  make install -j
  echo "[+] Successfully installed zlib"
}

install_zstd () {
  if pkg-config --exists libzstd; then
    echo "[~] zstd already installed at $(pkg-config --path libzstd), skipping installation"
    return 0
  fi

  cd ./opt/git/zstd/lib

  echo "[+] Installing zstd to $PREFIX"
  "${MAKE[@]}" DESTDIR="$PREFIX" PREFIX="" install-pc install-static install-includes
  echo "[+] Successfully installed zstd"
}

install_openssl () {
  if pkg-config --exists openssl; then
    echo "[~] openssl already installed at $(pkg-config --path openssl), skipping installation"
    return 0
  fi

  cd ./opt/git/openssl

  echo "[+] Configuring OpenSSL"
  ./config \
    --prefix="$PREFIX" \
    enable-quic
  echo "[+] Configured OpenSSL"

  echo "[+] Building OpenSSL"
  "${MAKE[@]}"
  echo "[+] Successfully built OpenSSL"

  echo "[+] Installing OpenSSL to $PREFIX"
  make install_sw -j
  echo "[+] Successfully installed OpenSSL"

  echo "[~] Installed all dependencies"
}

install () {
  ( install_zlib    )
  ( install_zstd    )
  ( install_openssl )

  echo "[~] Done! To wire up $(pwd)/opt with make, run:"
  echo "    source activate-opt"
  echo
}

if [[ $# -eq 0 ]]; then
  echo "[~] This will fetch, build, and install Firedancer's dependencies into $(pwd)/opt"
  echo "[~] For help, run: $0 help"
  echo
  echo "[~] Running $0 install"

  read -r -p "[?] Continue? (y/N) " choice
  case "$choice" in
    y|Y)
      echo
      fetch
      check
      install
      ;;
    *)
      echo "[!] Stopping." >&2
      exit 1
  esac
fi

while [[ $# -gt 0 ]]; do
  case $1 in
    -h|--help|help)
      help
      ;;
    nuke)
      shift
      nuke
      ;;
    fetch)
      shift
      fetch
      ;;
    check)
      shift
      check
      ;;
    install)
      shift
      fetch
      check
      install
      ;;
    *)
      echo "Unknown command: $1" >&2
      exit 1
      ;;
  esac
done