Add required setup files.

Author: Graybox CI

Source/.ruby-version

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+3.0.5

Source/Brewfile

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+brew "swiftlint"
+brew "carthage"
+brew "cmake"
+brew "ccache"

Source/setup.sh

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+#!/usr/bin/env bash
+set -eu
+
+if [ "${1:-}" == "brew" ]; then
+  echo "Updating brew..."
+  brew update
+  brew upgrade
+  shift
+fi
+
+# Install dependencies via homebrew, including carthage (see Brewfile)
+brew bundle
+
+# Initialize git submodules
+# macOS does not have realpath and readlink does not have -f option, so do this instead:
+myDir=$( cd "$(dirname "$0")" ; pwd -P )
+cd "${myDir}"
+
+core_dir="external/objectbox"
+
+if [ ! -d "../objectbox.git" ]; then
+  if [ -d "${core_dir}" ]; then
+    rm -d "${core_dir}"
+  fi
+  
+  echo "Updating git submodules..."
+  git submodule update --init --recursive external/SwiftLint external/objectbox-swift-generator
+else
+  echo "Updating git submodules..."
+  git submodule update --init --recursive
+
+  echo "Core submodule status and version string from ObjectStore.cpp:"
+  git submodule status "$core_dir"
+  grep 'ObjectStore_VERSION = ' "$core_dir/objectbox/src/main/cpp/ObjectStore.cpp"
+fi
+
+# Install Xcode command line tools (installed by default with newer versions)
+xcode_cli_tools=$(xcode-select 2>&1 --install || true)
+if [[ $xcode_cli_tools != *"already installed"* ]]; then
+  echo "Trying to install Xcode command line tools returned this message:"
+  echo "$xcode_cli_tools"
+  exit 1
+fi
+
+# Build SwiftLint from source into its `external/SwiftLint/.build` directory.
+make build_swiftlint
+
+# Build the code generator binary (including Sourcery)
+cd ios-framework
+make build_generator
+cd ..
+
+# Print Carthage version
+cartage_version=$(carthage version || true)
+echo "Carthage version: $cartage_version"
+
+# Install gems, including CocoaPods (see Gemfile)
+bundle install
+
+# Update CocoaPods repo
+cocoapods_version=$(pod --version || true)
+echo "Cocoapods version: $cocoapods_version"
+pod repo update
+
+# Print CMake version
+echo "CMake: $(cmake --version)"
+
+echo "Seems like setup was successful. So, what's next? See the Development section of the README."