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 `String` containing the
19 /// `PathBuf`'s filename. The prefix and suffix checking is much faster on the
20 /// `String` than the `PathBuf`. (The filename must be valid UTF-8. If it's
21 /// not, the entry should be skipped, because all Rust output files are valid
22 /// UTF-8, and so a non-UTF-8 filename couldn't be one we're looking for.)
23 #[derive(Clone, Debug)]
24 pub struct SearchPathFile {
26 pub file_name_str: String,
29 #[derive(PartialEq, Clone, Copy, Debug, Hash, Eq, Encodable, Decodable)]
39 rustc_data_structures::impl_stable_hash_via_hash!(PathKind);
42 pub fn matches(&self, kind: PathKind) -> bool {
44 (PathKind::All, _) | (_, PathKind::All) => true,
51 pub fn from_cli_opt(path: &str, output: config::ErrorOutputType) -> Self {
52 let (kind, path) = if let Some(stripped) = path.strip_prefix("native=") {
53 (PathKind::Native, stripped)
54 } else if let Some(stripped) = path.strip_prefix("crate=") {
55 (PathKind::Crate, stripped)
56 } else if let Some(stripped) = path.strip_prefix("dependency=") {
57 (PathKind::Dependency, stripped)
58 } else if let Some(stripped) = path.strip_prefix("framework=") {
59 (PathKind::Framework, stripped)
60 } else if let Some(stripped) = path.strip_prefix("all=") {
61 (PathKind::All, stripped)
66 early_error(output, "empty search path given via `-L`");
69 let dir = PathBuf::from(path);
73 pub fn from_sysroot_and_triple(sysroot: &Path, triple: &str) -> Self {
74 Self::new(PathKind::All, make_target_lib_path(sysroot, triple))
77 fn new(kind: PathKind, dir: PathBuf) -> Self {
78 // Get the files within the directory.
79 let files = match std::fs::read_dir(&dir) {
83 e.file_name().to_str().map(|s| SearchPathFile {
85 file_name_str: s.to_string(),
93 SearchPath { kind, dir, files }