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|
use std::{
fmt, fs,
path::{Path, PathBuf},
};
use relative_path::RelativePathBuf;
use thread_worker::WorkerHandle;
use walkdir::{DirEntry, WalkDir};
use crate::{has_rs_extension, watcher::WatcherChange, VfsRoot};
pub(crate) enum Task {
AddRoot {
root: VfsRoot,
path: PathBuf,
filter: Box<Fn(&DirEntry) -> bool + Send>,
},
LoadChange(crate::watcher::WatcherChange),
}
#[derive(Debug)]
pub struct AddRootResult {
pub(crate) root: VfsRoot,
pub(crate) files: Vec<(RelativePathBuf, String)>,
}
#[derive(Debug)]
pub enum WatcherChangeData {
Create { path: PathBuf, text: String },
Write { path: PathBuf, text: String },
Remove { path: PathBuf },
}
pub enum TaskResult {
AddRoot(AddRootResult),
HandleChange(WatcherChange),
LoadChange(Option<WatcherChangeData>),
}
impl fmt::Debug for TaskResult {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("TaskResult { ... }")
}
}
pub(crate) type Worker = thread_worker::Worker<Task, TaskResult>;
pub(crate) fn start() -> (Worker, WorkerHandle) {
thread_worker::spawn("vfs", 128, |input_receiver, output_sender| {
input_receiver
.into_iter()
.map(handle_task)
.try_for_each(|it| output_sender.send(it))
.unwrap()
})
}
fn handle_task(task: Task) -> TaskResult {
match task {
Task::AddRoot { root, path, filter } => {
log::debug!("loading {} ...", path.as_path().display());
let files = load_root(path.as_path(), &*filter);
log::debug!("... loaded {}", path.as_path().display());
TaskResult::AddRoot(AddRootResult { root, files })
}
Task::LoadChange(change) => {
log::debug!("loading {:?} ...", change);
let data = load_change(change);
TaskResult::LoadChange(data)
}
}
}
fn load_root(root: &Path, filter: &dyn Fn(&DirEntry) -> bool) -> Vec<(RelativePathBuf, String)> {
let mut res = Vec::new();
for entry in WalkDir::new(root).into_iter().filter_entry(filter) {
let entry = match entry {
Ok(entry) => entry,
Err(e) => {
log::warn!("watcher error: {}", e);
continue;
}
};
if !entry.file_type().is_file() {
continue;
}
let path = entry.path();
if !has_rs_extension(path) {
continue;
}
let text = match fs::read_to_string(path) {
Ok(text) => text,
Err(e) => {
log::warn!("watcher error: {}", e);
continue;
}
};
let path = RelativePathBuf::from_path(path.strip_prefix(root).unwrap()).unwrap();
res.push((path.to_owned(), text))
}
res
}
fn load_change(change: WatcherChange) -> Option<WatcherChangeData> {
let data = match change {
WatcherChange::Create(path) => {
let text = match fs::read_to_string(&path) {
Ok(text) => text,
Err(e) => {
log::warn!("watcher error: {}", e);
return None;
}
};
WatcherChangeData::Create { path, text }
}
WatcherChange::Write(path) => {
let text = match fs::read_to_string(&path) {
Ok(text) => text,
Err(e) => {
log::warn!("watcher error: {}", e);
return None;
}
};
WatcherChangeData::Write { path, text }
}
WatcherChange::Remove(path) => WatcherChangeData::Remove { path },
WatcherChange::Rescan => {
// this should be handled by Vfs::handle_task
return None;
}
};
Some(data)
}
|
