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authorRobin Krahl <me@robin-krahl.de>2018-07-05 19:19:55 +0200
committerRobin Krahl <me@robin-krahl.de>2018-07-05 19:19:55 +0200
commitb126c5ba1e5a9f00859868d75900043d02a0031c (patch)
treed35fcce5322caf414d3cd3a04a8999ef78e32a08
parent4cf21377525af162b3117523673dafab12bc388e (diff)
downloadnitrokey-sys-rs-b126c5ba1e5a9f00859868d75900043d02a0031c.tar.gz
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Extract libnitrokey version from crate version
This patch uses the nitrokey-sys-rs crate version to extract the version of the contained libnitrokey and to deduce the name of the libnitrokey directory. The implementation uses these assumptions: 1. The crate major and minor version match the libnitrokey major and minor version. 2. If the crate has a pre-release version, it is assumed that this version has the format pre.<d>, where <d> is the output of `git describe` with all dashes replaced by dots. 3. The name of the libnitrokey directory is libnitrokey-<tag>, where <tag> is the corresponding Git version tag. 4. libnitrokey uses version tags of the format v<maj>.<min>, where <maj> the major version and <min> is the minor version.
-rw-r--r--build.rs50
1 files changed, 46 insertions, 4 deletions
diff --git a/build.rs b/build.rs
index 47d2e19..e44b3c0 100644
--- a/build.rs
+++ b/build.rs
@@ -1,8 +1,49 @@
extern crate cc;
-use std::path::Path;
+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",
@@ -12,12 +53,13 @@ fn main() {
"log.cc",
"misc.cc",
];
- let library_dir = Path::new("libnitrokey-v3.3");
+ let library_dir = format!("libnitrokey-{}", version.git);
+ let library_path = path::Path::new(&library_dir);
cc::Build::new()
.cpp(true)
- .include(library_dir.join("libnitrokey"))
- .files(sources.iter().map(|s| library_dir.join(s)))
+ .include(library_path.join("libnitrokey"))
+ .files(sources.iter().map(|s| library_path.join(s)))
.compile("libnitrokey.a");
println!("cargo:rustc-link-lib=hidapi-libusb");