Implement Crate Feature to Disable SSL on Windows for ScyllaDB Node.js Driver

[Daniel-Boll]

The driver is currently facing a build issue on Windows due to problems encountered with OpenSSL configuration. To work around this issue and re-establish Windows support, this task proposes the introduction of a crate feature that will disable SSL on Windows platforms. This will simplify the build process and ensure functionality, albeit without SSL support for the time being.

Here's a breakdown of the task:

1. Feature Flag Creation:
   • Create a new feature flag, e.g., disable-ssl, in the Cargo.toml file.
   • Ensure this feature is conditional for Windows platforms only.

[features]
disable-ssl = ["cfg(windows)"]

2. Conditional Compilation and Dependency Exclusion:
   • Use Rust's conditional compilation attributes to disable the SSL-related code and dependencies when the disable-ssl feature is enabled.
   • Adjust the dependency declarations in Cargo.toml to exclude SSL dependencies on Windows.

#[cfg(not(feature = "disable-ssl"))]
extern crate openssl;

[dependencies]
scylla = { version = "0.10.1", features = ["ssl"], optional = true }
openssl = { version = "0.10", features = ["vendored"], optional = true }

[target.'cfg(windows)'.dependencies]
scylla = { version = "0.10.1", default-features = false } # There might be more things necessary

3. Documentation:

   • Update the project documentation to explain the new feature flag and its implications.
   • Include clear instructions for Windows users on how to use this feature to build the project, while making them aware of the temporary lack of SSL support.

4. Testing:

   • Ensure that the project builds successfully on Windows with the disable-ssl feature enabled.
   • Test the functionality of the driver on Windows to ensure it operates as expected without SSL.

5. Future Work:

   • Mention that this is a temporary workaround, and that a more robust solution to fix the OpenSSL issue on Windows and re-enable SSL support is in the pipeline.

This issue serves as a call for contributions to implement this feature, and invites discussion on any alternative solutions or potential implications. By addressing the OpenSSL configuration problem in a phased manner, we can promptly restore Windows compatibility for the ScyllaDB Node.js driver while working towards a complete solution.