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build.rs
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build.rs
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use std::fs;
fn main() {
#[cfg(target_os = "macos")]
{
println!("cargo:rustc-cdylib-link-arg=-undefined");
println!("cargo:rustc-cdylib-link-arg=dynamic_lookup");
}
gen_version();
}
fn gen_version() {
use tinyjson::JsonValue;
let payload = fs::read_to_string("package.json").unwrap();
let payload: JsonValue = payload.parse().unwrap();
let version_string: &String = payload["version"].get().unwrap();
let tokens: Vec<&str> = version_string.split(".").collect();
assert_eq!(tokens.len(), 3);
let (major, minor, patch) = (tokens[0], tokens[1], tokens[2]);
let source = format!(
r#"
pub struct Version {{
major: usize,
minor: usize,
patch: usize,
}}
pub const VERSION: Version = Version {{
major: {major},
minor: {minor},
patch: {patch},
}};
"#,
major = major,
minor = minor,
patch = patch
);
fs::create_dir_all("generated").unwrap();
fs::write("generated/version.rs", source).unwrap();
}