1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(non_camel_case_types)]
13 pub use self::FileMatch::*;
15 use std::collections::HashSet;
16 use std::io::fs::PathExtensions;
21 use session::search_paths::{SearchPaths, PathKind};
29 // A module for searching for libraries
30 // FIXME (#2658): I'm not happy how this module turned out. Should
31 // probably just be folded into cstore.
33 /// Functions with type `pick` take a parent directory as well as
34 /// a file found in that directory.
35 pub type pick<'a> = |path: &Path|: 'a -> FileMatch;
37 pub struct FileSearch<'a> {
38 pub sysroot: &'a Path,
39 pub search_paths: &'a SearchPaths,
44 impl<'a> FileSearch<'a> {
45 pub fn for_each_lib_search_path<F>(&self, mut f: F) where
46 F: FnMut(&Path) -> FileMatch,
48 let mut visited_dirs = HashSet::new();
49 let mut found = false;
51 for path in self.search_paths.iter(self.kind) {
53 FileMatches => found = true,
56 visited_dirs.insert(path.as_vec().to_vec());
59 debug!("filesearch: searching lib path");
60 let tlib_path = make_target_lib_path(self.sysroot,
62 if !visited_dirs.contains(tlib_path.as_vec()) {
64 FileMatches => found = true,
69 visited_dirs.insert(tlib_path.as_vec().to_vec());
72 let rustpath = rust_path();
73 for path in rustpath.iter() {
74 let tlib_path = make_rustpkg_lib_path(
75 self.sysroot, path, self.triple);
76 debug!("is {} in visited_dirs? {}", tlib_path.display(),
77 visited_dirs.contains(&tlib_path.as_vec().to_vec()));
79 if !visited_dirs.contains(tlib_path.as_vec()) {
80 visited_dirs.insert(tlib_path.as_vec().to_vec());
81 // Don't keep searching the RUST_PATH if one match turns up --
82 // if we did, we'd get a "multiple matching crates" error
94 pub fn get_lib_path(&self) -> Path {
95 make_target_lib_path(self.sysroot, self.triple)
98 pub fn search(&self, pick: pick) {
99 self.for_each_lib_search_path(|lib_search_path| {
100 debug!("searching {}", lib_search_path.display());
101 match fs::readdir(lib_search_path) {
103 let mut rslt = FileDoesntMatch;
104 fn is_rlib(p: & &Path) -> bool {
105 p.extension_str() == Some("rlib")
107 // Reading metadata out of rlibs is faster, and if we find both
108 // an rlib and a dylib we only read one of the files of
109 // metadata, so in the name of speed, bring all rlib files to
110 // the front of the search list.
111 let files1 = files.iter().filter(|p| is_rlib(p));
112 let files2 = files.iter().filter(|p| !is_rlib(p));
113 for path in files1.chain(files2) {
114 debug!("testing {}", path.display());
115 let maybe_picked = pick(path);
118 debug!("picked {}", path.display());
122 debug!("rejected {}", path.display());
128 Err(..) => FileDoesntMatch,
133 pub fn new(sysroot: &'a Path,
135 search_paths: &'a SearchPaths,
136 kind: PathKind) -> FileSearch<'a> {
137 debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
140 search_paths: search_paths,
146 // Returns a list of directories where target-specific dylibs might be located.
147 pub fn get_dylib_search_paths(&self) -> Vec<Path> {
148 let mut paths = Vec::new();
149 self.for_each_lib_search_path(|lib_search_path| {
150 paths.push(lib_search_path.clone());
156 // Returns a list of directories where target-specific tool binaries are located.
157 pub fn get_tools_search_paths(&self) -> Vec<Path> {
158 let mut p = Path::new(self.sysroot);
159 p.push(find_libdir(self.sysroot));
160 p.push(rustlibdir());
167 pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> Path {
168 let mut p = Path::new(find_libdir(sysroot));
169 assert!(p.is_relative());
170 p.push(rustlibdir());
171 p.push(target_triple);
176 fn make_target_lib_path(sysroot: &Path,
177 target_triple: &str) -> Path {
178 sysroot.join(&relative_target_lib_path(sysroot, target_triple))
181 fn make_rustpkg_lib_path(sysroot: &Path,
183 triple: &str) -> Path {
184 let mut p = dir.join(find_libdir(sysroot));
189 pub fn get_or_default_sysroot() -> Path {
190 // Follow symlinks. If the resolved path is relative, make it absolute.
191 fn canonicalize(path: Option<Path>) -> Option<Path> {
193 match myfs::realpath(&path) {
194 Ok(canon) => Some(canon),
195 Err(e) => panic!("failed to get realpath: {}", e),
199 match canonicalize(os::self_exe_name()) {
200 Some(mut p) => { p.pop(); p.pop(); p }
201 None => panic!("can't determine value for sysroot")
206 static PATH_ENTRY_SEPARATOR: &'static str = ";";
208 static PATH_ENTRY_SEPARATOR: &'static str = ":";
210 /// Returns RUST_PATH as a string, without default paths added
211 pub fn get_rust_path() -> Option<String> {
212 os::getenv("RUST_PATH").map(|x| x.to_string())
215 /// Returns the value of RUST_PATH, as a list
216 /// of Paths. Includes default entries for, if they exist:
218 /// DIR/.rust for any DIR that's the current working directory
219 /// or an ancestor of it
220 pub fn rust_path() -> Vec<Path> {
221 let mut env_rust_path: Vec<Path> = match get_rust_path() {
223 let env_path_components =
224 env_path.split_str(PATH_ENTRY_SEPARATOR);
225 env_path_components.map(|s| Path::new(s)).collect()
229 let mut cwd = os::getcwd().unwrap();
230 // now add in default entries
231 let cwd_dot_rust = cwd.join(".rust");
232 if !env_rust_path.contains(&cwd_dot_rust) {
233 env_rust_path.push(cwd_dot_rust);
235 if !env_rust_path.contains(&cwd) {
236 env_rust_path.push(cwd.clone());
239 if { let f = cwd.filename(); f.is_none() || f.unwrap() == b".." } {
242 cwd.set_filename(".rust");
243 if !env_rust_path.contains(&cwd) && cwd.exists() {
244 env_rust_path.push(cwd.clone());
248 let h = os::homedir();
250 let p = h.join(".rust");
251 if !env_rust_path.contains(&p) && p.exists() {
252 env_rust_path.push(p);
258 // The name of the directory rustc expects libraries to be located.
259 // On Unix should be "lib", on windows "bin"
261 fn find_libdir(sysroot: &Path) -> String {
262 // FIXME: This is a quick hack to make the rustc binary able to locate
263 // Rust libraries in Linux environments where libraries might be installed
264 // to lib64/lib32. This would be more foolproof by basing the sysroot off
265 // of the directory where librustc is located, rather than where the rustc
267 //If --libdir is set during configuration to the value other than
268 // "lib" (i.e. non-default), this value is used (see issue #16552).
270 match option_env!("CFG_LIBDIR_RELATIVE") {
271 Some(libdir) if libdir != "lib" => return libdir.to_string(),
272 _ => if sysroot.join(primary_libdir_name()).join(rustlibdir()).exists() {
273 return primary_libdir_name();
275 return secondary_libdir_name();
279 #[cfg(target_word_size = "64")]
280 fn primary_libdir_name() -> String {
284 #[cfg(target_word_size = "32")]
285 fn primary_libdir_name() -> String {
289 fn secondary_libdir_name() -> String {
295 fn find_libdir(_sysroot: &Path) -> String {
299 // The name of rustc's own place to organize libraries.
300 // Used to be "rustc", now the default is "rustlib"
301 pub fn rustlibdir() -> String {
302 "rustlib".to_string()