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build.rs
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build.rs
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use paste::paste;
use std::env;
use std::fs;
use std::path::Path;
use std::str::FromStr;
macro_rules! p {
($($tokens: tt)*) => {{
if env::var("BUILD_PRINT_EXPANDED_ENV").unwrap_or_default() == "true" {
println!("cargo:warning={}", format!($($tokens)*));
}
}}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
prost_build::compile_protos(
&["src/proto/message.proto", "src/proto/stpw.proto"],
&["src/proto/"],
)?;
embuild::build::CfgArgs::output_propagated("ESP_IDF")?;
embuild::build::LinkArgs::output_propagated("ESP_IDF")?;
build_env()?;
Ok(())
}
fn build_env() -> Result<(), Box<dyn std::error::Error>> {
let out_dir = env::var_os("OUT_DIR").unwrap();
let dest_path = Path::new(&out_dir).join("build_env.rs");
dotenvy::from_filename("build.env")?;
let mut lines = vec![];
macro_rules! env_string {
($name: expr, $default: expr) => {
paste! {
lines.push(format!(
"pub static {}: &'static str = \"{}\";",
$name,
env::var($name).unwrap_or($default.into())
));
}
};
}
macro_rules! env_number {
($name: expr, $type: ty, $default: expr) => {
paste! {
lines.push(format!(
"pub static {}: {} = {};",
$name,
stringify!($type),
env::var($name).map(|s| $type::from_str(s.as_str()).unwrap()).unwrap_or($default)
));
}
};
}
env_string!(
"DEPHY_ENDPOINT_HTTP",
"https://send.testnet.dephy.io/dephy/signed_message"
);
env_number!("APP_SEND_LOOP_DURATION", u64, 10);
for l in lines.iter() {
p!("cargo:warning={}", l)
}
fs::write(&dest_path, lines.join("\n")).unwrap();
println!("cargo:rerun-if-changed=build.rs");
println!("cargo:rerun-if-changed=build.env");
Ok(())
}