bootstrap

#!/bin/bash

export SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)

##
## Configuration Variables
##

config() {
  # A whitespace-separated list of executables that must be present and locatable.
  # These will each be installed through Homebrew if not found.
  : ${REQUIRED_TOOLS="cmake libssh2 libtool autoconf automake pkg-config openssl"}

  export REQUIRED_TOOLS
}

##
## Bootstrap Process
##

main() {
  config

  git submodule update --init --recursive

  if [ -n "$REQUIRED_TOOLS" ]; then
    echo "** Checking dependencies in Homebrew ..."
    check_deps
  fi
}

check_deps() {
  # Check if Homebrew is installed
  which -s brew
  local result=$?

  if [ "$result" -ne "0" ]; then
    echo
    echo "Homebrew is not installed (http://brew.sh). You will need to manually ensure the following tools are installed:"
    echo "  $REQUIRED_TOOLS"
    echo
    echo "Additionally, the following libssh2 files must be symlinked under /usr/local or /opt/homebrew :"
    echo "  lib/libssh2.a include/libssh2.h include/libssh2_sftp.h include/libssh2_publickey.h"

    if [ ! -z "$CI" ]; then
      echo
      echo "I will try to install it now on github CI"
      /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
      echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >>/Users/hannes/.zprofile
      eval "$(/opt/homebrew/bin/brew shellenv)"
    fi
  fi

  brew_prefix=$(brew --prefix)
  if [[ $(uname -m) == 'arm64' ]]; then
    echo "** Running on a Apple Silicon M1"
    export expected_prefix=/opt/homebrew
  else
    echo "** Running on a Apple x86"
    export expected_prefix=/usr/local
  fi

  # Ensure that we have libgit2's dependencies installed.
  installed=$(brew list)

  for tool in $REQUIRED_TOOLS; do
    # Skip packages that are already installed.
    echo "$installed" | grep -q "$tool" && code=$? || code=$?

    if [ "$code" -eq "0" ]; then
      echo "*** $tool is available 👍"
      continue
    elif [ "$code" -ne "1" ]; then
      exit $code
    fi

    echo "*** Installing $tool with Homebrew..."
    brew install "$tool"
  done

  install_path="./External"
  echo "*** copy "$brew_prefix"/lib/libssh2.a to $install_path"
  cp "$brew_prefix"/lib/libssh2.a $install_path

  if [ "$brew_prefix" != "$expected_prefix" ]; then
    echo "*** Adding soft links into $expected_prefix..."

    products=(lib/libssh2.a include/libssh2.h include/libssh2_sftp.h include/libssh2_publickey.h)

    for product in "${products[@]}"; do
      destination="$expected_prefix/$product"
      if [ -e "$destination" ]; then
        continue
      fi

      sudo mkdir -p "$(dirname "$destination")"
      sudo ln -s "$brew_prefix/$product" "$destination"
    done
  fi

  # openssl@1 is expected
  sslSource=$(find $brew_prefix -name libcrypto.a | grep openssl | sort | head -1 | xargs dirname)
  echo "Find libcrypto.a and take first $sslSource and copy to $install_path"
  cp $sslSource/* $install_path 2>/dev/null | echo "Copy and ignore subdirectory. This makes build work on x86 and arm64"
  ls -la $install_path
}

main