/
filesearch.rs
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/
filesearch.rs
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![allow(non_camel_case_types)]
pub use self::FileMatch::*;
use std::collections::HashSet;
use std::io::fs::PathExtensions;
use std::io::fs;
use std::os;
use util::fs as myfs;
use session::search_paths::{SearchPaths, PathKind};
#[derive(Copy)]
pub enum FileMatch {
FileMatches,
FileDoesntMatch,
}
// A module for searching for libraries
// FIXME (#2658): I'm not happy how this module turned out. Should
// probably just be folded into cstore.
pub struct FileSearch<'a> {
pub sysroot: &'a Path,
pub search_paths: &'a SearchPaths,
pub triple: &'a str,
pub kind: PathKind,
}
impl<'a> FileSearch<'a> {
pub fn for_each_lib_search_path<F>(&self, mut f: F) where
F: FnMut(&Path) -> FileMatch,
{
let mut visited_dirs = HashSet::new();
let mut found = false;
for path in self.search_paths.iter(self.kind) {
match f(path) {
FileMatches => found = true,
FileDoesntMatch => ()
}
visited_dirs.insert(path.as_vec().to_vec());
}
debug!("filesearch: searching lib path");
let tlib_path = make_target_lib_path(self.sysroot,
self.triple);
if !visited_dirs.contains(tlib_path.as_vec()) {
match f(&tlib_path) {
FileMatches => found = true,
FileDoesntMatch => ()
}
}
visited_dirs.insert(tlib_path.as_vec().to_vec());
// Try RUST_PATH
if !found {
let rustpath = rust_path();
for path in rustpath.iter() {
let tlib_path = make_rustpkg_lib_path(
self.sysroot, path, self.triple);
debug!("is {} in visited_dirs? {}", tlib_path.display(),
visited_dirs.contains(&tlib_path.as_vec().to_vec()));
if !visited_dirs.contains(tlib_path.as_vec()) {
visited_dirs.insert(tlib_path.as_vec().to_vec());
// Don't keep searching the RUST_PATH if one match turns up --
// if we did, we'd get a "multiple matching crates" error
match f(&tlib_path) {
FileMatches => {
break;
}
FileDoesntMatch => ()
}
}
}
}
}
pub fn get_lib_path(&self) -> Path {
make_target_lib_path(self.sysroot, self.triple)
}
pub fn search<F>(&self, mut pick: F) where F: FnMut(&Path) -> FileMatch {
self.for_each_lib_search_path(|lib_search_path| {
debug!("searching {}", lib_search_path.display());
match fs::readdir(lib_search_path) {
Ok(files) => {
let mut rslt = FileDoesntMatch;
fn is_rlib(p: & &Path) -> bool {
p.extension_str() == Some("rlib")
}
// Reading metadata out of rlibs is faster, and if we find both
// an rlib and a dylib we only read one of the files of
// metadata, so in the name of speed, bring all rlib files to
// the front of the search list.
let files1 = files.iter().filter(|p| is_rlib(p));
let files2 = files.iter().filter(|p| !is_rlib(p));
for path in files1.chain(files2) {
debug!("testing {}", path.display());
let maybe_picked = pick(path);
match maybe_picked {
FileMatches => {
debug!("picked {}", path.display());
rslt = FileMatches;
}
FileDoesntMatch => {
debug!("rejected {}", path.display());
}
}
}
rslt
}
Err(..) => FileDoesntMatch,
}
});
}
pub fn new(sysroot: &'a Path,
triple: &'a str,
search_paths: &'a SearchPaths,
kind: PathKind) -> FileSearch<'a> {
debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
FileSearch {
sysroot: sysroot,
search_paths: search_paths,
triple: triple,
kind: kind,
}
}
// Returns a list of directories where target-specific dylibs might be located.
pub fn get_dylib_search_paths(&self) -> Vec<Path> {
let mut paths = Vec::new();
self.for_each_lib_search_path(|lib_search_path| {
paths.push(lib_search_path.clone());
FileDoesntMatch
});
paths
}
// Returns a list of directories where target-specific tool binaries are located.
pub fn get_tools_search_paths(&self) -> Vec<Path> {
let mut p = Path::new(self.sysroot);
p.push(find_libdir(self.sysroot));
p.push(rustlibdir());
p.push(self.triple);
p.push("bin");
vec![p]
}
}
pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> Path {
let mut p = Path::new(find_libdir(sysroot));
assert!(p.is_relative());
p.push(rustlibdir());
p.push(target_triple);
p.push("lib");
p
}
fn make_target_lib_path(sysroot: &Path,
target_triple: &str) -> Path {
sysroot.join(&relative_target_lib_path(sysroot, target_triple))
}
fn make_rustpkg_lib_path(sysroot: &Path,
dir: &Path,
triple: &str) -> Path {
let mut p = dir.join(find_libdir(sysroot));
p.push(triple);
p
}
pub fn get_or_default_sysroot() -> Path {
// Follow symlinks. If the resolved path is relative, make it absolute.
fn canonicalize(path: Option<Path>) -> Option<Path> {
path.and_then(|path|
match myfs::realpath(&path) {
Ok(canon) => Some(canon),
Err(e) => panic!("failed to get realpath: {}", e),
})
}
match canonicalize(os::self_exe_name()) {
Some(mut p) => { p.pop(); p.pop(); p }
None => panic!("can't determine value for sysroot")
}
}
#[cfg(windows)]
static PATH_ENTRY_SEPARATOR: &'static str = ";";
#[cfg(not(windows))]
static PATH_ENTRY_SEPARATOR: &'static str = ":";
/// Returns RUST_PATH as a string, without default paths added
pub fn get_rust_path() -> Option<String> {
os::getenv("RUST_PATH").map(|x| x.to_string())
}
/// Returns the value of RUST_PATH, as a list
/// of Paths. Includes default entries for, if they exist:
/// $HOME/.rust
/// DIR/.rust for any DIR that's the current working directory
/// or an ancestor of it
pub fn rust_path() -> Vec<Path> {
let mut env_rust_path: Vec<Path> = match get_rust_path() {
Some(env_path) => {
let env_path_components =
env_path.split_str(PATH_ENTRY_SEPARATOR);
env_path_components.map(|s| Path::new(s)).collect()
}
None => Vec::new()
};
let mut cwd = os::getcwd().unwrap();
// now add in default entries
let cwd_dot_rust = cwd.join(".rust");
if !env_rust_path.contains(&cwd_dot_rust) {
env_rust_path.push(cwd_dot_rust);
}
if !env_rust_path.contains(&cwd) {
env_rust_path.push(cwd.clone());
}
loop {
if { let f = cwd.filename(); f.is_none() || f.unwrap() == b".." } {
break
}
cwd.set_filename(".rust");
if !env_rust_path.contains(&cwd) && cwd.exists() {
env_rust_path.push(cwd.clone());
}
cwd.pop();
}
let h = os::homedir();
for h in h.iter() {
let p = h.join(".rust");
if !env_rust_path.contains(&p) && p.exists() {
env_rust_path.push(p);
}
}
env_rust_path
}
// The name of the directory rustc expects libraries to be located.
// On Unix should be "lib", on windows "bin"
#[cfg(unix)]
fn find_libdir(sysroot: &Path) -> String {
// FIXME: This is a quick hack to make the rustc binary able to locate
// Rust libraries in Linux environments where libraries might be installed
// to lib64/lib32. This would be more foolproof by basing the sysroot off
// of the directory where librustc is located, rather than where the rustc
// binary is.
//If --libdir is set during configuration to the value other than
// "lib" (i.e. non-default), this value is used (see issue #16552).
match option_env!("CFG_LIBDIR_RELATIVE") {
Some(libdir) if libdir != "lib" => return libdir.to_string(),
_ => if sysroot.join(primary_libdir_name()).join(rustlibdir()).exists() {
return primary_libdir_name();
} else {
return secondary_libdir_name();
}
}
#[cfg(any(all(stage0, target_word_size = "64"), all(not(stage0), target_pointer_width = "64")))]
fn primary_libdir_name() -> String {
"lib64".to_string()
}
#[cfg(any(all(stage0, target_word_size = "32"), all(not(stage0), target_pointer_width = "32")))]
fn primary_libdir_name() -> String {
"lib32".to_string()
}
fn secondary_libdir_name() -> String {
"lib".to_string()
}
}
#[cfg(windows)]
fn find_libdir(_sysroot: &Path) -> String {
"bin".to_string()
}
// The name of rustc's own place to organize libraries.
// Used to be "rustc", now the default is "rustlib"
pub fn rustlibdir() -> String {
"rustlib".to_string()
}