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|
//! Object safe interface for file watching and reading.
use std::fmt;
use paths::{AbsPath, AbsPathBuf};
#[derive(Debug, Clone)]
pub enum Entry {
Files(Vec<AbsPathBuf>),
Directories(Directories),
}
/// Specifies a set of files on the file system.
///
/// A file is included if:
/// * it has included extension
/// * it is under an `include` path
/// * it is not under `exclude` path
///
/// If many include/exclude paths match, the longest one wins.
#[derive(Debug, Clone)]
pub struct Directories {
pub extensions: Vec<String>,
pub include: Vec<AbsPathBuf>,
pub exclude: Vec<AbsPathBuf>,
}
#[derive(Debug)]
pub struct Config {
pub load: Vec<Entry>,
pub watch: Vec<usize>,
}
pub enum Message {
Progress { n_total: usize, n_done: usize },
Loaded { files: Vec<(AbsPathBuf, Option<Vec<u8>>)> },
}
pub type Sender = Box<dyn Fn(Message) + Send>;
pub trait Handle: fmt::Debug {
fn spawn(sender: Sender) -> Self
where
Self: Sized;
fn set_config(&mut self, config: Config);
fn invalidate(&mut self, path: AbsPathBuf);
fn load_sync(&mut self, path: &AbsPath) -> Option<Vec<u8>>;
}
impl Entry {
pub fn rs_files_recursively(base: AbsPathBuf) -> Entry {
Entry::Directories(dirs(base, &[".git"]))
}
pub fn local_cargo_package(base: AbsPathBuf) -> Entry {
Entry::Directories(dirs(base, &[".git", "target"]))
}
pub fn cargo_package_dependency(base: AbsPathBuf) -> Entry {
Entry::Directories(dirs(base, &[".git", "/tests", "/examples", "/benches"]))
}
pub fn contains_file(&self, path: &AbsPath) -> bool {
match self {
Entry::Files(files) => files.iter().any(|it| it == path),
Entry::Directories(dirs) => dirs.contains_file(path),
}
}
pub fn contains_dir(&self, path: &AbsPath) -> bool {
match self {
Entry::Files(_) => false,
Entry::Directories(dirs) => dirs.contains_dir(path),
}
}
}
impl Directories {
pub fn contains_file(&self, path: &AbsPath) -> bool {
let ext = path.extension().unwrap_or_default();
if self.extensions.iter().all(|it| it.as_str() != ext) {
return false;
}
self.includes_path(path)
}
pub fn contains_dir(&self, path: &AbsPath) -> bool {
self.includes_path(path)
}
fn includes_path(&self, path: &AbsPath) -> bool {
let mut include = None;
for incl in &self.include {
if is_prefix(incl, path) {
include = Some(match include {
Some(prev) if is_prefix(incl, prev) => prev,
_ => incl,
})
}
}
let include = match include {
Some(it) => it,
None => return false,
};
for excl in &self.exclude {
if is_prefix(excl, path) && is_prefix(include, excl) {
return false;
}
}
return true;
fn is_prefix(short: &AbsPath, long: &AbsPath) -> bool {
long.strip_prefix(short).is_some()
}
}
}
fn dirs(base: AbsPathBuf, exclude: &[&str]) -> Directories {
let exclude = exclude.iter().map(|it| base.join(it)).collect::<Vec<_>>();
Directories { extensions: vec!["rs".to_string()], include: vec![base], exclude }
}
impl fmt::Debug for Message {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Message::Loaded { files } => {
f.debug_struct("Loaded").field("n_files", &files.len()).finish()
}
Message::Progress { n_total, n_done } => f
.debug_struct("Progress")
.field("n_total", n_total)
.field("n_done", n_done)
.finish(),
}
}
}
#[test]
fn handle_is_object_safe() {
fn _assert(_: &dyn Handle) {}
}
|
