1 pub use self::FileMatch
::*;
6 use std
::path
::{Path, PathBuf}
;
8 use crate::search_paths
::{PathKind, SearchPath, SearchPathFile}
;
9 use rustc_fs_util
::fix_windows_verbatim_for_gcc
;
12 #[derive(Copy, Clone)]
18 // A module for searching for libraries
21 pub struct FileSearch
<'a
> {
24 search_paths
: &'a
[SearchPath
],
25 tlib_path
: &'a SearchPath
,
29 impl<'a
> FileSearch
<'a
> {
30 pub fn search_paths(&self) -> impl Iterator
<Item
= &'a SearchPath
> {
34 .filter(move |sp
| sp
.kind
.matches(kind
))
35 .chain(std
::iter
::once(self.tlib_path
))
38 pub fn get_lib_path(&self) -> PathBuf
{
39 make_target_lib_path(self.sysroot
, self.triple
)
42 pub fn get_self_contained_lib_path(&self) -> PathBuf
{
43 self.get_lib_path().join("self-contained")
46 pub fn search
<F
>(&self, mut pick
: F
)
48 F
: FnMut(&SearchPathFile
, PathKind
) -> FileMatch
,
50 for search_path
in self.search_paths() {
51 debug
!("searching {}", search_path
.dir
.display());
52 fn is_rlib(spf
: &SearchPathFile
) -> bool
{
53 if let Some(f
) = &spf
.file_name_str { f.ends_with(".rlib") }
else { false }
55 // Reading metadata out of rlibs is faster, and if we find both
56 // an rlib and a dylib we only read one of the files of
57 // metadata, so in the name of speed, bring all rlib files to
58 // the front of the search list.
59 let files1
= search_path
.files
.iter().filter(|spf
| is_rlib(&spf
));
60 let files2
= search_path
.files
.iter().filter(|spf
| !is_rlib(&spf
));
61 for spf
in files1
.chain(files2
) {
62 debug
!("testing {}", spf
.path
.display());
63 let maybe_picked
= pick(spf
, search_path
.kind
);
66 debug
!("picked {}", spf
.path
.display());
69 debug
!("rejected {}", spf
.path
.display());
79 search_paths
: &'a Vec
<SearchPath
>,
80 tlib_path
: &'a SearchPath
,
83 debug
!("using sysroot = {}, triple = {}", sysroot
.display(), triple
);
84 FileSearch { sysroot, triple, search_paths, tlib_path, kind }
87 // Returns just the directories within the search paths.
88 pub fn search_path_dirs(&self) -> Vec
<PathBuf
> {
89 self.search_paths().map(|sp
| sp
.dir
.to_path_buf()).collect()
92 // Returns a list of directories where target-specific tool binaries are located.
93 pub fn get_tools_search_paths(&self, self_contained
: bool
) -> Vec
<PathBuf
> {
94 let mut p
= PathBuf
::from(self.sysroot
);
95 p
.push(find_libdir(self.sysroot
).as_ref());
99 if self_contained { vec![p.clone(), p.join("self-contained")] }
else { vec![p] }
103 pub fn relative_target_lib_path(sysroot
: &Path
, target_triple
: &str) -> PathBuf
{
104 let mut p
= PathBuf
::from(find_libdir(sysroot
).as_ref());
105 assert
!(p
.is_relative());
106 p
.push(RUST_LIB_DIR
);
107 p
.push(target_triple
);
112 pub fn make_target_lib_path(sysroot
: &Path
, target_triple
: &str) -> PathBuf
{
113 sysroot
.join(&relative_target_lib_path(sysroot
, target_triple
))
116 pub fn get_or_default_sysroot() -> PathBuf
{
117 // Follow symlinks. If the resolved path is relative, make it absolute.
118 fn canonicalize(path
: PathBuf
) -> PathBuf
{
119 let path
= fs
::canonicalize(&path
).unwrap_or(path
);
120 // See comments on this target function, but the gist is that
121 // gcc chokes on verbatim paths which fs::canonicalize generates
122 // so we try to avoid those kinds of paths.
123 fix_windows_verbatim_for_gcc(&path
)
126 match env
::current_exe() {
128 let mut p
= canonicalize(exe
);
133 Err(e
) => panic
!("failed to get current_exe: {}", e
),
137 // The name of the directory rustc expects libraries to be located.
138 fn find_libdir(sysroot
: &Path
) -> Cow
<'
static, str> {
139 // FIXME: This is a quick hack to make the rustc binary able to locate
140 // Rust libraries in Linux environments where libraries might be installed
141 // to lib64/lib32. This would be more foolproof by basing the sysroot off
142 // of the directory where `librustc_driver` is located, rather than
143 // where the rustc binary is.
144 // If --libdir is set during configuration to the value other than
145 // "lib" (i.e., non-default), this value is used (see issue #16552).
147 #[cfg(target_pointer_width = "64")]
148 const PRIMARY_LIB_DIR
: &str = "lib64";
150 #[cfg(target_pointer_width = "32")]
151 const PRIMARY_LIB_DIR
: &str = "lib32";
153 const SECONDARY_LIB_DIR
: &str = "lib";
155 match option_env
!("CFG_LIBDIR_RELATIVE") {
156 None
| Some("lib") => {
157 if sysroot
.join(PRIMARY_LIB_DIR
).join(RUST_LIB_DIR
).exists() {
158 PRIMARY_LIB_DIR
.into()
160 SECONDARY_LIB_DIR
.into()
163 Some(libdir
) => libdir
.into(),
167 // The name of rustc's own place to organize libraries.
168 // Used to be "rustc", now the default is "rustlib"
169 const RUST_LIB_DIR
: &str = "rustlib";