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use std::path::{Path, PathBuf};
fn manifest_dir() -> PathBuf {
std::env::var_os("CARGO_MANIFEST_DIR")
.map(PathBuf::from)
.expect("Expected CARGO_MANIFEST_DIR environment variable")
}
fn out_dir() -> PathBuf {
std::env::var_os("OUT_DIR")
.map(PathBuf::from)
.expect("Expected OUT_DIR environment variable")
}
fn is_env(env_var: &str, value: &str) -> bool {
std::env::var_os(env_var)
.map(|v| v == value)
.unwrap_or(false)
}
fn setup_unix(output_file: PathBuf) {
println!("cargo:rustc-cdylib-link-arg=-o");
println!("cargo:rustc-cdylib-link-arg={}", output_file.display());
}
fn setup_windows(output_file: PathBuf) {
let pdb_file = output_file
.file_name()
.map(|file| out_dir().join(Path::new(file).with_extension("pdb")))
.expect("Expected a neon output file name");
println!("cargo:rustc-cdylib-link-arg=/OUT:{}", output_file.display());
println!("cargo:rustc-cdylib-link-arg=/PDB:{}", pdb_file.display());
}
#[derive(Debug, Default)]
pub struct Setup {
output_dir: Option<PathBuf>,
output_file: Option<PathBuf>,
}
impl Setup {
pub fn options() -> Self {
Default::default()
}
pub fn output_dir(&mut self, output_dir: impl AsRef<Path>) -> &mut Self {
self.output_dir = Some(output_dir.as_ref().to_path_buf());
self
}
pub fn output_file(&mut self, output_file: impl AsRef<Path>) -> &mut Self {
self.output_file = Some(output_file.as_ref().to_path_buf());
self
}
pub fn setup(&self) {
let output_file = self.absolute_output_file();
let is_windows = is_env("CARGO_CFG_TARGET_OS", "windows");
let is_gnu = is_env("CARGO_CFG_TARGET_ENV", "gnu");
if is_windows && !is_gnu {
setup_windows(output_file);
} else {
setup_unix(output_file);
}
}
fn absolute_output_file(&self) -> PathBuf {
let output_file = self
.output_file
.clone()
.unwrap_or_else(|| PathBuf::from("index.node"));
if output_file.is_absolute() {
return output_file;
}
let output_dir = if let Some(output_dir) = self.output_dir.clone() {
if output_dir.is_absolute() {
output_dir
} else {
manifest_dir().join(output_dir)
}
} else {
manifest_dir()
};
output_dir.join(output_file)
}
}
pub(crate) fn setup() {
Setup::options().setup()
}
#[test]
fn test_absolute_output_file_defaults() {
let expected = manifest_dir().join("index.node");
let actual = Setup::options().absolute_output_file();
assert_eq!(actual, expected);
}
#[test]
fn test_absolute_output_file_absolute_file() {
let expected = PathBuf::from("/tmp/hello.node");
let actual = Setup::options()
.output_dir("/tmp/ignore/me")
.output_file("/tmp/hello.node")
.absolute_output_file();
assert_eq!(actual, expected);
}
#[test]
fn test_absolute_output_file_absolute_dir() {
let expected = PathBuf::from("/tmp/index.node");
let actual = Setup::options().output_dir("/tmp").absolute_output_file();
assert_eq!(actual, expected);
}
#[test]
fn test_absolute_output_file_relative_dir() {
let expected = manifest_dir().join("lib").join("index.node");
let actual = Setup::options().output_dir("lib").absolute_output_file();
assert_eq!(actual, expected);
}
#[test]
fn test_absolute_output_file_relative_file() {
let expected = manifest_dir().join("lib.node");
let actual = Setup::options()
.output_file("lib.node")
.absolute_output_file();
assert_eq!(actual, expected);
}