--- /dev/null
+use crate::filesearch::make_target_lib_path;
+use crate::{config, early_error};
+use std::path::{Path, PathBuf};
+
+#[derive(Clone, Debug)]
+pub struct SearchPath {
+ pub kind: PathKind,
+ pub dir: PathBuf,
+ pub files: Vec<SearchPathFile>,
+}
+
+// The obvious implementation of `SearchPath::files` is a `Vec<PathBuf>`. But
+// it is searched repeatedly by `find_library_crate`, and the searches involve
+// checking the prefix and suffix of the filename of each `PathBuf`. This is
+// doable, but very slow, because it involves calls to `file_name` and
+// `extension` that are themselves slow.
+//
+// This type augments the `PathBuf` with an `Option<String>` containing the
+// `PathBuf`'s filename. The prefix and suffix checking is much faster on the
+// `Option<String>` than the `PathBuf`. (It's an `Option` because
+// `Path::file_name` can fail; if that happens then all subsequent checking
+// will also fail, which is fine.)
+#[derive(Clone, Debug)]
+pub struct SearchPathFile {
+ pub path: PathBuf,
+ pub file_name_str: Option<String>,
+}
+
+impl SearchPathFile {
+ fn new(path: PathBuf) -> SearchPathFile {
+ let file_name_str = path.file_name().and_then(|f| f.to_str()).map(|s| s.to_string());
+ SearchPathFile { path, file_name_str }
+ }
+}
+
+#[derive(PartialEq, Clone, Copy, Debug, Hash, Eq, Encodable, Decodable)]
+pub enum PathKind {
+ Native,
+ Crate,
+ Dependency,
+ Framework,
+ ExternFlag,
+ All,
+}
+
+rustc_data_structures::impl_stable_hash_via_hash!(PathKind);
+
+impl PathKind {
+ pub fn matches(&self, kind: PathKind) -> bool {
+ match (self, kind) {
+ (PathKind::All, _) | (_, PathKind::All) => true,
+ _ => *self == kind,
+ }
+ }
+}
+
+impl SearchPath {
+ pub fn from_cli_opt(path: &str, output: config::ErrorOutputType) -> Self {
+ let (kind, path) = if let Some(stripped) = path.strip_prefix("native=") {
+ (PathKind::Native, stripped)
+ } else if let Some(stripped) = path.strip_prefix("crate=") {
+ (PathKind::Crate, stripped)
+ } else if let Some(stripped) = path.strip_prefix("dependency=") {
+ (PathKind::Dependency, stripped)
+ } else if let Some(stripped) = path.strip_prefix("framework=") {
+ (PathKind::Framework, stripped)
+ } else if let Some(stripped) = path.strip_prefix("all=") {
+ (PathKind::All, stripped)
+ } else {
+ (PathKind::All, path)
+ };
+ if path.is_empty() {
+ early_error(output, "empty search path given via `-L`");
+ }
+
+ let dir = PathBuf::from(path);
+ Self::new(kind, dir)
+ }
+
+ pub fn from_sysroot_and_triple(sysroot: &Path, triple: &str) -> Self {
+ Self::new(PathKind::All, make_target_lib_path(sysroot, triple))
+ }
+
+ fn new(kind: PathKind, dir: PathBuf) -> Self {
+ // Get the files within the directory.
+ let files = match std::fs::read_dir(&dir) {
+ Ok(files) => files
+ .filter_map(|e| e.ok().map(|e| SearchPathFile::new(e.path())))
+ .collect::<Vec<_>>(),
+ Err(..) => vec![],
+ };
+
+ SearchPath { kind, dir, files }
+ }
+}