Simple proc-macros to generate build timestamp string literals.
Based on Jasen Borisov's build_timestamp crate.
Two function like procedures are provided: build_time_utc and build_time_local.
They take an optional strftime date and time format string as input, and return a string literal. If the input is empty, they will return a string literal in RFC 3339 date and time format, e.g., "2021-05-29T06:55:50.418437046+00:00".
Requires Rust 1.45+ because these macros are used in expression positions.
use build_time::{build_time_utc, build_time_local};
// Returns the UTC build timestamp in RFC3339 date and time format.
let utc_build_time = build_time_utc!();
// Returns the local build timestamp in the specified format.
let local_build_time = build_time_local!("%Y-%m-%dT%H:%M:%S%.f%:z");