Macro crate_version 

macro_rules! crate_version {
    (VERSION) => { ... };
    (BUILD_TIME) => { ... };
    (VERSION => $vis:vis $name:ident) => { ... };
    (VERSION => $vis:vis $name:ident, $($c:tt)*) => { ... };
    (BUILD_TIME => $vis:vis $name:ident) => { ... };
}

Helper to create version string or build time for your crate.

Package version with git info is in format {CARGO_PKG_VERSION}-{git btanch}-{git commit}-{debug or release}, like 0.4.0-main-c298bc2-DEBUG.

Should have git installed.

Example

• Create a build.rs in the root dir if not persists, and use this macro in the main func. The main func should return Result.

  • For a version string, use crate_version!(VERSION)

  • For a build time in RFC3339 format, use crate_version!(BUILD_TIME).

    Don’t forget to add chrono to your build dependencies.

• In your crate, place crate_version!(VERSION => pub VERSION), crate_version!(VERSION => pub VERSION) where you like.

  You can even do this: crate_version!(VERSION => pub VERSION, env!("CARGO_PKG_NAME", "/"))