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extern crate cc;
use std::env;
use std::path;
struct Version {
major: String,
minor: String,
git: String,
}
fn stringify(err: env::VarError) -> String {
format!("{}", err)
}
fn extract_git_version(pre: &str) -> Result<String, String> {
// If a pre-release version is set, it is expected to have the format
// pre.v<maj>.<min>.<n>.g<hash>, where <maj> and <min> are the last major and minor version,
// <n> is the number of commits since this version and <hash> is the hash of the last commit.
let parts: Vec<&str> = pre.split('.').collect();
if parts.len() != 5 {
return Err(format!("'{}' is not a valid pre-release version", pre));
}
Ok(format!("{}.{}-{}-{}", parts[1], parts[2], parts[3], parts[4]))
}
fn get_version() -> Result<Version, String> {
let major = env::var("CARGO_PKG_VERSION_MAJOR").map_err(stringify)?;
let minor = env::var("CARGO_PKG_VERSION_MINOR").map_err(stringify)?;
let pre = env::var("CARGO_PKG_VERSION_PRE").map_err(stringify)?;
let git = match pre.is_empty() {
true => format!("v{}.{}", major, minor),
false => extract_git_version(&pre)?,
};
Ok(Version {
major,
minor,
git,
})
}
fn main() {
let version = get_version().expect("Could not extract library version");
let sources = [
"DeviceCommunicationExceptions.cpp",
"NK_C_API.cc",
"NitrokeyManager.cc",
"command_id.cc",
"device.cc",
"log.cc",
"misc.cc",
];
let library_dir = format!("libnitrokey-{}", version.git);
let library_path = path::Path::new(&library_dir);
cc::Build::new()
.cpp(true)
.include(library_path.join("libnitrokey"))
.files(sources.iter().map(|s| library_path.join(s)))
.compile("libnitrokey.a");
println!("cargo:rustc-link-lib=hidapi-libusb");
}
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