generated from rp-rs/rp2040-project-template
/
build.rs
79 lines (72 loc) · 2.31 KB
/
build.rs
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//! This build script copies the `memory.x` file from the crate root into
//! a directory where the linker can always find it at build time.
//! For many projects this is optional, as the linker always searches the
//! project root directory -- wherever `Cargo.toml` is. However, if you
//! are using a workspace or have a more complicated build setup, this
//! build script becomes required. Additionally, by requesting that
//! Cargo re-run the build script whenever `memory.x` is changed,
//! updating `memory.x` ensures a rebuild of the application with the
//! new memory settings.
//!
//! The build script also stores the current time in a Rust file so the
//! program can set the real-time clock.
use chrono::{self, Datelike, Timelike};
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
fn main() {
// Put `memory.x` in our output directory and ensure it's
// on the linker search path.
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out.join("memory.x"))
.unwrap()
.write_all(include_bytes!("memory.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// By default, Cargo will re-run a build script whenever
// any file in the project changes. By specifying `memory.x`
// here, we ensure the build script is only re-run when
// `memory.x` is changed.
println!("cargo:rerun-if-changed=memory.x");
let now = chrono::Local::now();
let mut file = File::create(out.join("build_time.rs")).unwrap();
write!(
file,
"// This file is generated by build.rs and should not be modified manually.
/// Structure containing date and time information
pub struct DateTime {{
/// 0..4095
pub year: u16,
/// 1..12, 1 is January
pub month: u8,
/// 1..28,29,30,31 depending on month
pub day: u8,
///
pub day_of_week: u8,
/// 0..23
pub hour: u8,
/// 0..59
pub minute: u8,
/// 0..59
pub second: u8,
}}
pub const BUILD_TIME: DateTime = DateTime {{
year: {},
month: {},
day: {},
day_of_week: {},
hour: {},
minute: {},
second: {},
}};",
now.year(),
now.month(),
now.day(),
now.weekday().number_from_sunday(),
now.hour(),
now.minute(),
now.second()
)
.unwrap();
}