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mod description;
mod kind;
mod map;
mod normalize;
mod options;
mod parse;
mod resolve;
use description::DescriptionFileInfo;
use kind::PathKind;
use options::ResolverOptions;
use std::{
collections::HashMap,
path::{Path, PathBuf},
};
#[derive(Default)]
pub struct Resolver {
options: ResolverOptions,
base_dir: Option<PathBuf>,
cache_dir_info: HashMap<PathBuf, DirInfo>,
cache_description_file_info: HashMap<PathBuf, DescriptionFileInfo>,
}
pub struct DirInfo {
pub description_file_path: PathBuf,
}
type ResolverError = String;
type RResult<T> = Result<T, ResolverError>;
type ResolverResult = RResult<Option<PathBuf>>;
impl Resolver {
pub fn with_base_dir(self, base_dir: &Path) -> Self {
Self {
base_dir: Some(base_dir.to_path_buf()),
..self
}
}
pub fn use_base_dir(&mut self, base_dir: &Path) {
self.base_dir = Some(base_dir.to_path_buf());
}
fn get_base_dir(&self) -> &PathBuf {
self.base_dir
.as_ref()
.unwrap_or_else(|| panic!("base_dir is not set"))
}
pub fn resolve(&mut self, target: &str) -> ResolverResult {
self._resolve(self.get_base_dir(), target.to_owned())
}
fn _resolve(&self, base_dir: &Path, target: String) -> ResolverResult {
let normalized_target = &if let Some(target_after_alias) = self.normalize_alias(target) {
target_after_alias
} else {
return Ok(None);
};
let part = Self::parse(normalized_target);
let kind = Self::get_path_kind(&part.request);
let dir = match kind {
PathKind::Empty => return Err(ResolverError::from("empty path")),
PathKind::BuildInModule => return Ok(Some(PathBuf::from(&part.request))),
PathKind::AbsolutePosix | PathKind::AbsoluteWin => PathBuf::from("/"),
_ => base_dir.to_path_buf(),
};
let description_file_info = self.load_description_file(&dir.join(&part.request))?;
let (dir, target) = match self.get_real_target(
&dir,
&part.request,
&part.query,
&part.fragment,
&kind,
&description_file_info,
false,
)? {
Some((dir, target)) => (dir, target),
None => return Ok(None),
};
(if matches!(
Self::get_path_kind(&target),
PathKind::AbsolutePosix | PathKind::AbsoluteWin | PathKind::Relative
) {
self.resolve_as_file(&dir, &target)
.or_else(|_| self.resolve_as_dir(&dir, &target, &part.query, &part.fragment, false))
} else {
self.resolve_as_modules(&dir, &target, &part.query, &part.fragment)
})
.and_then(|path| self.normalize_path(path, &part.query, &part.fragment))
}
}