| #![allow(non_camel_case_types)] |
| |
| pub use self::FileMatch::*; |
| |
| use std::borrow::Cow; |
| use std::env; |
| use std::fs; |
| use std::path::{Path, PathBuf}; |
| |
| use crate::session::search_paths::{SearchPath, PathKind}; |
| use rustc_fs_util::fix_windows_verbatim_for_gcc; |
| |
| #[derive(Copy, Clone)] |
| pub enum FileMatch { |
| FileMatches, |
| FileDoesntMatch, |
| } |
| |
| // A module for searching for libraries |
| |
| #[derive(Clone)] |
| pub struct FileSearch<'a> { |
| sysroot: &'a Path, |
| triple: &'a str, |
| search_paths: &'a [SearchPath], |
| tlib_path: &'a SearchPath, |
| kind: PathKind, |
| } |
| |
| impl<'a> FileSearch<'a> { |
| pub fn search_paths(&self) -> impl Iterator<Item = &'a SearchPath> { |
| let kind = self.kind; |
| self.search_paths.iter() |
| .filter(move |sp| sp.kind.matches(kind)) |
| .chain(std::iter::once(self.tlib_path)) |
| } |
| |
| pub fn get_lib_path(&self) -> PathBuf { |
| make_target_lib_path(self.sysroot, self.triple) |
| } |
| |
| pub fn search<F>(&self, mut pick: F) |
| where F: FnMut(&Path, PathKind) -> FileMatch |
| { |
| for search_path in self.search_paths() { |
| debug!("searching {}", search_path.dir.display()); |
| fn is_rlib(p: &Path) -> bool { |
| p.extension() == Some("rlib".as_ref()) |
| } |
| // 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 = search_path.files.iter().filter(|p| is_rlib(p)); |
| let files2 = search_path.files.iter().filter(|p| !is_rlib(p)); |
| for path in files1.chain(files2) { |
| debug!("testing {}", path.display()); |
| let maybe_picked = pick(path, search_path.kind); |
| match maybe_picked { |
| FileMatches => { |
| debug!("picked {}", path.display()); |
| } |
| FileDoesntMatch => { |
| debug!("rejected {}", path.display()); |
| } |
| } |
| } |
| } |
| } |
| |
| pub fn new(sysroot: &'a Path, |
| triple: &'a str, |
| search_paths: &'a Vec<SearchPath>, |
| tlib_path: &'a SearchPath, |
| kind: PathKind) |
| -> FileSearch<'a> { |
| debug!("using sysroot = {}, triple = {}", sysroot.display(), triple); |
| FileSearch { |
| sysroot, |
| triple, |
| search_paths, |
| tlib_path, |
| kind, |
| } |
| } |
| |
| // Returns just the directories within the search paths. |
| pub fn search_path_dirs(&self) -> Vec<PathBuf> { |
| self.search_paths() |
| .map(|sp| sp.dir.to_path_buf()) |
| .collect() |
| } |
| |
| // Returns a list of directories where target-specific tool binaries are located. |
| pub fn get_tools_search_paths(&self) -> Vec<PathBuf> { |
| let mut p = PathBuf::from(self.sysroot); |
| p.push(find_libdir(self.sysroot).as_ref()); |
| p.push(RUST_LIB_DIR); |
| p.push(&self.triple); |
| p.push("bin"); |
| vec![p] |
| } |
| } |
| |
| pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf { |
| let mut p = PathBuf::from(find_libdir(sysroot).as_ref()); |
| assert!(p.is_relative()); |
| p.push(RUST_LIB_DIR); |
| p.push(target_triple); |
| p.push("lib"); |
| p |
| } |
| |
| pub fn make_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf { |
| sysroot.join(&relative_target_lib_path(sysroot, target_triple)) |
| } |
| |
| pub fn get_or_default_sysroot() -> PathBuf { |
| // Follow symlinks. If the resolved path is relative, make it absolute. |
| fn canonicalize(path: Option<PathBuf>) -> Option<PathBuf> { |
| path.and_then(|path| { |
| match fs::canonicalize(&path) { |
| // See comments on this target function, but the gist is that |
| // gcc chokes on verbatim paths which fs::canonicalize generates |
| // so we try to avoid those kinds of paths. |
| Ok(canon) => Some(fix_windows_verbatim_for_gcc(&canon)), |
| Err(e) => bug!("failed to get realpath: {}", e), |
| } |
| }) |
| } |
| |
| match env::current_exe() { |
| Ok(exe) => { |
| match canonicalize(Some(exe)) { |
| Some(mut p) => { p.pop(); p.pop(); p }, |
| None => bug!("can't determine value for sysroot") |
| } |
| } |
| Err(ref e) => panic!(format!("failed to get current_exe: {}", e)) |
| } |
| } |
| |
| // The name of the directory rustc expects libraries to be located. |
| fn find_libdir(sysroot: &Path) -> Cow<'static, str> { |
| // 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). |
| |
| #[cfg(target_pointer_width = "64")] |
| const PRIMARY_LIB_DIR: &str = "lib64"; |
| |
| #[cfg(target_pointer_width = "32")] |
| const PRIMARY_LIB_DIR: &str = "lib32"; |
| |
| const SECONDARY_LIB_DIR: &str = "lib"; |
| |
| match option_env!("CFG_LIBDIR_RELATIVE") { |
| Some(libdir) if libdir != "lib" => libdir.into(), |
| _ => if sysroot.join(PRIMARY_LIB_DIR).join(RUST_LIB_DIR).exists() { |
| PRIMARY_LIB_DIR.into() |
| } else { |
| SECONDARY_LIB_DIR.into() |
| } |
| } |
| } |
| |
| // The name of rustc's own place to organize libraries. |
| // Used to be "rustc", now the default is "rustlib" |
| const RUST_LIB_DIR: &str = "rustlib"; |