# build_id
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[Docs](https://docs.rs/build_id/0.2.1)
Obtain a [`Uuid`](https://docs.rs/uuid/0.8/uuid/) uniquely representing the
build of the current binary.
This is intended to be used to check that different processes are indeed
invocations of identically laid out binaries.
As such:
* It is guaranteed to be identical within multiple invocations of the same
binary.
* It is guaranteed to be different across binaries with different code or data
segments or layout.
* Equality is unspecified if the binaries have identical code and data segments
and layout but differ immaterially (e.g. if a timestamp is included in the
binary at compile time).
## Examples
```rust
let local_build_id = build_id::get();
if local_build_id == remote_build_id {
println!("We're running the same binary as remote!");
} else {
println!("We're running a different binary to remote");
}
```
## Note
This looks first for linker-inserted build ID / binary UUIDs (i.e.
`.note.gnu.build-id` on Linux; `LC_UUID` in Mach-O; etc), falling back to
hashing the whole binary.
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE.txt](LICENSE-APACHE.txt) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT.txt](LICENSE-MIT.txt) or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.