1 use crate::filesearch::make_target_lib_path;
2 use crate::{config, early_error};
3 use std::path::{Path, PathBuf};
5 #[derive(Clone, Debug)]
6 pub struct SearchPath {
9 pub files: Vec<SearchPathFile>,
12 // The obvious implementation of `SearchPath::files` is a `Vec<PathBuf>`. But
13 // it is searched repeatedly by `find_library_crate`, and the searches involve
14 // checking the prefix and suffix of the filename of each `PathBuf`. This is
15 // doable, but very slow, because it involves calls to `file_name` and
16 // `extension` that are themselves slow.
18 // This type augments the `PathBuf` with an `Option<String>` containing the
19 // `PathBuf`'s filename. The prefix and suffix checking is much faster on the
20 // `Option<String>` than the `PathBuf`. (It's an `Option` because
21 // `Path::file_name` can fail; if that happens then all subsequent checking
22 // will also fail, which is fine.)
23 #[derive(Clone, Debug)]
24 pub struct SearchPathFile {
26 pub file_name_str: Option<String>,
30 fn new(path: PathBuf) -> SearchPathFile {
31 let file_name_str = path.file_name().and_then(|f| f.to_str()).map(|s| s.to_string());
32 SearchPathFile { path, file_name_str }
36 #[derive(PartialEq, Clone, Copy, Debug, Hash, Eq, Encodable, Decodable)]
46 rustc_data_structures::impl_stable_hash_via_hash!(PathKind);
49 pub fn matches(&self, kind: PathKind) -> bool {
51 (PathKind::All, _) | (_, PathKind::All) => true,
58 pub fn from_cli_opt(path: &str, output: config::ErrorOutputType) -> Self {
59 let (kind, path) = if let Some(stripped) = path.strip_prefix("native=") {
60 (PathKind::Native, stripped)
61 } else if let Some(stripped) = path.strip_prefix("crate=") {
62 (PathKind::Crate, stripped)
63 } else if let Some(stripped) = path.strip_prefix("dependency=") {
64 (PathKind::Dependency, stripped)
65 } else if let Some(stripped) = path.strip_prefix("framework=") {
66 (PathKind::Framework, stripped)
67 } else if let Some(stripped) = path.strip_prefix("all=") {
68 (PathKind::All, stripped)
73 early_error(output, "empty search path given via `-L`");
76 let dir = PathBuf::from(path);
80 pub fn from_sysroot_and_triple(sysroot: &Path, triple: &str) -> Self {
81 Self::new(PathKind::All, make_target_lib_path(sysroot, triple))
84 fn new(kind: PathKind, dir: PathBuf) -> Self {
85 // Get the files within the directory.
86 let files = match std::fs::read_dir(&dir) {
88 .filter_map(|e| e.ok().map(|e| SearchPathFile::new(e.path())))
93 SearchPath { kind, dir, files }