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use std::collections::HashSet;
use std::env;
use std::old_io::IoError;
use syntax::ast;
pub struct RPathConfig<F, G> where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
pub used_crates: Vec<(ast::CrateNum, Option<Path>)>,
pub out_filename: Path,
pub is_like_osx: bool,
pub has_rpath: bool,
pub get_install_prefix_lib_path: F,
pub realpath: G,
}
pub fn get_rpath_flags<F, G>(config: RPathConfig<F, G>) -> Vec<String> where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
if !config.has_rpath {
return Vec::new();
}
let mut flags = Vec::new();
debug!("preparing the RPATH!");
let libs = config.used_crates.clone();
let libs = libs.into_iter().filter_map(|(_, l)| l).collect::<Vec<_>>();
let rpaths = get_rpaths(config, &libs[..]);
flags.push_all(&rpaths_to_flags(&rpaths[..]));
flags
}
fn rpaths_to_flags(rpaths: &[String]) -> Vec<String> {
let mut ret = Vec::new();
for rpath in rpaths {
ret.push(format!("-Wl,-rpath,{}", &(*rpath)[]));
}
return ret;
}
fn get_rpaths<F, G>(mut config: RPathConfig<F, G>, libs: &[Path]) -> Vec<String> where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
debug!("output: {:?}", config.out_filename.display());
debug!("libs:");
for libpath in libs {
debug!(" {:?}", libpath.display());
}
let rel_rpaths = get_rpaths_relative_to_output(&mut config, libs);
let fallback_rpaths = vec!(get_install_prefix_rpath(config));
fn log_rpaths(desc: &str, rpaths: &[String]) {
debug!("{} rpaths:", desc);
for rpath in rpaths {
debug!(" {}", *rpath);
}
}
log_rpaths("relative", &rel_rpaths[..]);
log_rpaths("fallback", &fallback_rpaths[..]);
let mut rpaths = rel_rpaths;
rpaths.push_all(&fallback_rpaths[..]);
let rpaths = minimize_rpaths(&rpaths[..]);
return rpaths;
}
fn get_rpaths_relative_to_output<F, G>(config: &mut RPathConfig<F, G>,
libs: &[Path]) -> Vec<String> where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
libs.iter().map(|a| get_rpath_relative_to_output(config, a)).collect()
}
fn get_rpath_relative_to_output<F, G>(config: &mut RPathConfig<F, G>, lib: &Path) -> String where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
let prefix = if config.is_like_osx {
"@loader_path"
} else {
"$ORIGIN"
};
let cwd = env::current_dir().unwrap();
let mut lib = (config.realpath)(&cwd.join(lib)).unwrap();
lib.pop();
let mut output = (config.realpath)(&cwd.join(&config.out_filename)).unwrap();
output.pop();
let relative = lib.path_relative_from(&output);
let relative = relative.expect("could not create rpath relative to output");
format!("{}/{}",
prefix,
relative.as_str().expect("non-utf8 component in path"))
}
fn get_install_prefix_rpath<F, G>(config: RPathConfig<F, G>) -> String where
F: FnOnce() -> Path,
G: FnMut(&Path) -> Result<Path, IoError>,
{
let path = (config.get_install_prefix_lib_path)();
let path = env::current_dir().unwrap().join(&path);
path.as_str().expect("non-utf8 component in rpath").to_string()
}
fn minimize_rpaths(rpaths: &[String]) -> Vec<String> {
let mut set = HashSet::new();
let mut minimized = Vec::new();
for rpath in rpaths {
if set.insert(&rpath[..]) {
minimized.push(rpath.clone());
}
}
minimized
}
#[cfg(all(unix, test))]
mod test {
use super::{RPathConfig};
use super::{minimize_rpaths, rpaths_to_flags, get_rpath_relative_to_output};
#[test]
fn test_rpaths_to_flags() {
let flags = rpaths_to_flags(&[
"path1".to_string(),
"path2".to_string()
]);
assert_eq!(flags,
["-Wl,-rpath,path1",
"-Wl,-rpath,path2"]);
}
#[test]
fn test_minimize1() {
let res = minimize_rpaths(&[
"rpath1".to_string(),
"rpath2".to_string(),
"rpath1".to_string()
]);
assert!(res == [
"rpath1",
"rpath2",
]);
}
#[test]
fn test_minimize2() {
let res = minimize_rpaths(&[
"1a".to_string(),
"2".to_string(),
"2".to_string(),
"1a".to_string(),
"4a".to_string(),
"1a".to_string(),
"2".to_string(),
"3".to_string(),
"4a".to_string(),
"3".to_string()
]);
assert!(res == [
"1a",
"2",
"4a",
"3",
]);
}
#[test]
#[cfg(any(target_os = "linux", target_os = "android"))]
fn test_rpath_relative() {
let config = &mut RPathConfig {
used_crates: Vec::new(),
out_filename: Path::new("bin/rustc"),
get_install_prefix_lib_path: || panic!(),
has_rpath: true,
is_like_osx: false,
realpath: |p| Ok(p.clone())
};
let res = get_rpath_relative_to_output(config, &Path::new("lib/libstd.so"));
assert_eq!(res, "$ORIGIN/../lib");
}
#[test]
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
target_os = "openbsd"))]
fn test_rpath_relative() {
let config = &mut RPathConfig {
used_crates: Vec::new(),
has_rpath: true,
is_like_osx: false,
out_filename: Path::new("bin/rustc"),
get_install_prefix_lib_path: || panic!(),
realpath: |p| Ok(p.clone())
};
let res = get_rpath_relative_to_output(config, &Path::new("lib/libstd.so"));
assert_eq!(res, "$ORIGIN/../lib");
}
#[test]
#[cfg(target_os = "macos")]
fn test_rpath_relative() {
let config = &mut RPathConfig {
used_crates: Vec::new(),
has_rpath: true,
is_like_osx: true,
out_filename: Path::new("bin/rustc"),
get_install_prefix_lib_path: || panic!(),
realpath: |p| Ok(p.clone())
};
let res = get_rpath_relative_to_output(config, &Path::new("lib/libstd.so"));
assert_eq!(res, "@loader_path/../lib");
}
}
