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mod description;
mod kind;
mod map;
mod normalize;
mod options;
mod parse;
mod raise;
mod resolve;
use dashmap::DashMap;
use description::DescriptionFileInfo;
use kind::PathKind;
pub use options::ResolverOptions;
use parse::Request;
use std::{
path::{Path, PathBuf},
sync::Arc,
};
#[derive(Default, Debug)]
pub struct Resolver {
pub options: ResolverOptions,
pub cache: Option<ResolverCache>,
}
#[derive(Default, Debug)]
pub struct ResolverCache {
pub dir_info: DashMap<PathBuf, Arc<DirInfo>>,
pub description_file_info: DashMap<PathBuf, Arc<DescriptionFileInfo>>,
}
#[derive(Debug)]
pub struct DirInfo {
pub description_file_path: PathBuf,
}
#[derive(Clone, Debug)]
pub struct Stats {
pub dir: PathBuf,
pub request: Request,
}
impl Stats {
pub fn from(dir: PathBuf, request: Request) -> Self {
Self { dir, request }
}
pub fn get_path(&self) -> PathBuf {
if self.request.target.is_empty() {
self.dir.to_path_buf()
} else {
self.dir.join(&*self.request.target)
}
}
pub fn with_dir(self, dir: PathBuf) -> Self {
Self { dir, ..self }
}
pub fn with_target(self, target: String) -> Self {
Self {
request: Request {
target: target.into(),
..self.request
},
..self
}
}
}
type ResolverError = String;
type RResult<T> = Result<T, ResolverError>;
type ResolverStats = RResult<Option<Stats>>;
#[derive(Debug, PartialEq)]
pub enum ResolveResult {
Path(PathBuf),
Ignored,
}
type ResolverResult = RResult<ResolveResult>;
impl Resolver {
pub fn new(options: ResolverOptions) -> Self {
let cache = if options.enable_unsafe_cache {
Some(ResolverCache::default())
} else {
None
};
let extensions: Vec<String> = options
.extensions
.into_iter()
.map(|s| {
if let Some(striped) = s.strip_prefix('.') {
striped.to_string()
} else {
s
}
})
.collect();
let enforce_extension = if options.enforce_extension.is_none() {
Some(extensions.iter().any(|ext| ext.is_empty()))
} else {
options.enforce_extension
};
let options = ResolverOptions {
extensions,
enforce_extension,
..options
};
Self { options, cache }
}
pub fn resolve(&self, base_dir: &Path, target: &str) -> ResolverResult {
self._resolve(base_dir, target.to_string())
}
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(ResolveResult::Ignored);
};
if self.options.prefer_relative
&& !normalized_target.starts_with("../")
&& !normalized_target.starts_with("./")
{
let result = self._resolve(base_dir, format!("./{}", normalized_target));
if result.is_ok() {
return result;
}
}
let stats = Stats::from(base_dir.to_path_buf(), Self::parse(normalized_target));
let init_query = stats.request.query.clone();
let init_fragment = stats.request.fragment.clone();
let kind = Self::get_target_kind(&stats.request.target);
let dir = match kind {
PathKind::Empty => return Resolver::raise(base_dir, ""),
PathKind::BuildInModule => {
return Ok(ResolveResult::Path(PathBuf::from(&*stats.request.target)))
}
PathKind::AbsolutePosix | PathKind::AbsoluteWin => PathBuf::from("/"),
_ => base_dir.to_path_buf(),
};
let stats = stats.with_dir(dir);
let description_file_info =
self.load_description_file(&stats.dir.join(&*stats.request.target))?;
let stats = match self.get_real_target(stats, &kind, &description_file_info, false)? {
Some(stats) => stats,
None => return Ok(ResolveResult::Ignored),
};
if matches!(
Self::get_target_kind(&stats.request.target),
PathKind::AbsolutePosix | PathKind::AbsoluteWin | PathKind::Relative
) {
self.resolve_as_file(&stats)
.or_else(|_| match self.resolve_as_dir(stats, false)? {
Some(stats) => Ok(ResolveResult::Path(stats.get_path())),
None => Ok(ResolveResult::Ignored),
})
} else {
match self.resolve_as_modules(stats)? {
Some(stats) => Ok(ResolveResult::Path(stats.get_path())),
None => Ok(ResolveResult::Ignored),
}
}
.and_then(|result| self.normalize_path(result, &init_query, &init_fragment))
}
}