Provides the ability to gather information about the crate's cargo build.

All OysterPack modules must provide build time info. This module standardizes the approach, which leverages built.

How to integrate within your project

1. Add the following to Cargo.toml: ```toml [package] build = "build.rs"

   [build-dependencies] oysterpack_built = "0.1" ```

2. Include the following in build.rs:

   For Library Modules ```norun extern crate oysterpackbuilt;

   fn main() { oysterpackbuilt::writelibrarybuiltfile().expect("Failed to acquire build-time information"); } ```

   For Application (Binary) Modules ```norun extern crate oysterpackbuilt;

   fn main() { oysterpackbuilt::writeappbuiltfile().expect("Failed to acquire build-time information"); } ```

   • includes application dependency info
     • NOTE: dependency info can only be collected for standalone projects, i.e., this will not work for projects that are part of a Cargo workspace.
     • Cargo.lock is used to get the application's dependencies. Since Cargo.lock is shared by all projects in a workspace, this approach won't work for workspaces.

3. The build script will by default write a file named built.rs into Cargo's output directory. It can be picked up like this: no_run // Use of a mod or pub mod is not actually necessary. pub mod build { // The file has been placed there by the build script. include!(concat!(env!("OUT_DIR"), "/built.rs")); }

   • OUT_DIR environment variable is set by Cargo for build scripts