Vapor is a popular web framework for Swift. It is composed of many Swift and Clang dependencies. Some of their Clang modules (e.g. CBcrypt) have custom module maps. This example exercises the rules_swift_package_manager code that processes custom module maps and handles novel Clang module linking issues.

Also, this example demonstrates how to store the Swift-specific dependency files in a sub-package.

Be sure to install the folllwing to ensure that all of the prerequisites are satisfied.

sudo apt install sqlite3 libsqlite3-dev