Use packaged libnitrokey instead of compiling from source

Per default, nitrokey-sys compiles libnitrokey from source.  This commit
patches nitrokey-sys to use the packaged libnitrokey instead.  Firstly,
this makes the build process easier.  Secondly, this guarantees that the
udev rules required to use the Nitrokey devices are already in place (as
they are shipped with the libnitrokey package).

1 files changed, 120 insertions, 0 deletions

diff --git a/use-system-library.patch b/use-system-library.patch
new file mode 100644
index 000000000000..991c9e14e9d5
--- /dev/null
+++ b/use-system-library.patch
@@ -0,0 +1,120 @@
+Only in nitrocli-0.2.0: cc
+diff -ura nitrocli-0.2.0/nitrokey-sys/build.rs nitrocli-0.2.0.new/nitrokey-sys/build.rs
+--- nitrocli-0.2.0/nitrokey-sys/build.rs	2019-01-02 01:21:10.000000000 +0000
++++ nitrocli-0.2.0.new/nitrokey-sys/build.rs	2019-01-04 16:21:39.881258886 +0000
+@@ -1,104 +1,3 @@
+-extern crate cc;
+-
+-use std::env;
+-use std::io;
+-use std::io::{Read, Write};
+-use std::fs;
+-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 patch = env::var("CARGO_PKG_VERSION_PATCH").map_err(stringify)?;
+-    let pre = env::var("CARGO_PKG_VERSION_PRE").map_err(stringify)?;
+-
+-    let git = match pre.is_empty() {
+-        true => match patch.is_empty() {
+-            true => format!("v{}.{}", major, minor),
+-            false => format!("v{}.{}.{}", major, minor, patch),
+-        },
+-        false => extract_git_version(&pre)?,
+-    };
+-
+-    Ok(Version {
+-        major,
+-        minor,
+-        git,
+-    })
+-}
+-
+-fn prepare_version_source(
+-    version: &Version,
+-    out_path: &path::Path,
+-    library_path: &path::Path
+-) -> io::Result<path::PathBuf> {
+-    let out = out_path.join("version.cc");
+-    let template = library_path.join("version.cc.in");
+-
+-    let mut file = fs::File::open(template)?;
+-    let mut data = String::new();
+-    file.read_to_string(&mut data)?;
+-    drop(file);
+-
+-    let data = data
+-        .replace("@PROJECT_VERSION_MAJOR@", &version.major)
+-        .replace("@PROJECT_VERSION_MINOR@", &version.minor)
+-        .replace("@PROJECT_VERSION_GIT@", &version.git);
+-
+-    let mut file = fs::File::create(&out)?;
+-    file.write_all(data.as_bytes())?;
+-
+-    Ok(out)
+-}
+-
+ fn main() {
+-    let out_dir = env::var("OUT_DIR").expect("Environment variable OUT_DIR is not set");
+-    let out_path = path::PathBuf::from(out_dir);
+-
+-    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);
+-
+-    let version_source = prepare_version_source(&version, &out_path, &library_path)
+-        .expect("Could not prepare the version source file");
+-
+-    cc::Build::new()
+-        .cpp(true)
+-        .include(library_path.join("libnitrokey"))
+-        .files(sources.iter().map(|s| library_path.join(s)))
+-        .file(version_source)
+-        .compile("libnitrokey.a");
+-
+-    println!("cargo:rustc-link-lib=hidapi-libusb");
++    println!("cargo:rustc-link-lib=nitrokey");
+ }
+diff -ura nitrocli-0.2.0/nitrokey-sys/Cargo.toml nitrocli-0.2.0.new/nitrokey-sys/Cargo.toml
+--- nitrocli-0.2.0/nitrokey-sys/Cargo.toml	2019-01-02 01:21:10.000000000 +0000
++++ nitrocli-0.2.0.new/nitrokey-sys/Cargo.toml	2019-01-04 16:21:53.252875210 +0000
+@@ -10,6 +10,3 @@
+ links = "nitrokey"
+ build = "build.rs"
+ readme = "README.md"
+-
+-[build-dependencies]
+-cc = "1.0"