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Merge #665

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665: Pr 556 r=matklad a=matklad

Rebased #556 

Thanks @vemoo, now I can change branches without reopening VS Code!

Co-authored-by: Bernardo <berublan@gmail.com>
This commit is contained in:
bors[bot] 2019-01-26 08:47:56 +00:00
commit c869ee219a
6 changed files with 907 additions and 217 deletions
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268
Cargo.lock generated
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"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403" "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
@ -1715,6 +1954,7 @@ dependencies = [
"checksum serde_json 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)" = "4b90a9fbe1211e57d3e1c15670f1cb00802988fb23a1a4aad7a2b63544f1920e" "checksum serde_json 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)" = "4b90a9fbe1211e57d3e1c15670f1cb00802988fb23a1a4aad7a2b63544f1920e"
"checksum serde_yaml 0.8.8 (registry+https://github.com/rust-lang/crates.io-index)" = "0887a8e097a69559b56aa2526bf7aff7c3048cf627dff781f0b56a6001534593" "checksum serde_yaml 0.8.8 (registry+https://github.com/rust-lang/crates.io-index)" = "0887a8e097a69559b56aa2526bf7aff7c3048cf627dff781f0b56a6001534593"
"checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded" "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
"checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
"checksum slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373" "checksum slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373"
"checksum smallvec 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "88aea073965ab29f6edb5493faf96ad662fb18aa9eeb186a3b7057951605ed15" "checksum smallvec 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "88aea073965ab29f6edb5493faf96ad662fb18aa9eeb186a3b7057951605ed15"
"checksum smol_str 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9af1035bc5d742ab6b7ab16713e41cc2ffe78cb474f6f43cd696b2d16052007e" "checksum smol_str 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9af1035bc5d742ab6b7ab16713e41cc2ffe78cb474f6f43cd696b2d16052007e"
@ -1733,6 +1973,9 @@ dependencies = [
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b" "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
"checksum threadpool 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e2f0c90a5f3459330ac8bc0d2f879c693bb7a2f59689c1083fc4ef83834da865" "checksum threadpool 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e2f0c90a5f3459330ac8bc0d2f879c693bb7a2f59689c1083fc4ef83834da865"
"checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f" "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
"checksum tokio-executor 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "30c6dbf2d1ad1de300b393910e8a3aa272b724a400b6531da03eed99e329fbf0"
"checksum tokio-io 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "b53aeb9d3f5ccf2ebb29e19788f96987fa1355f8fe45ea193928eaaaf3ae820f"
"checksum tokio-reactor 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "afbcdb0f0d2a1e4c440af82d7bbf0bf91a8a8c0575bcd20c05d15be7e9d3a02f"
"checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169" "checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
"checksum ucd-trie 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "71a9c5b1fe77426cf144cc30e49e955270f5086e31a6441dfa8b32efc09b9d77" "checksum ucd-trie 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "71a9c5b1fe77426cf144cc30e49e955270f5086e31a6441dfa8b32efc09b9d77"
"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86" "checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
@ -1757,8 +2000,11 @@ dependencies = [
"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d" "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
"checksum wait-timeout 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "b9f3bf741a801531993db6478b95682117471f76916f5e690dd8d45395b09349" "checksum wait-timeout 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "b9f3bf741a801531993db6478b95682117471f76916f5e690dd8d45395b09349"
"checksum walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "9d9d7ed3431229a144296213105a390676cc49c9b6a72bd19f3176c98e129fa1" "checksum walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "9d9d7ed3431229a144296213105a390676cc49c9b6a72bd19f3176c98e129fa1"
"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
"checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0" "checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6" "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
"checksum winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "afc5508759c5bf4285e61feb862b6083c8480aec864fa17a81fdec6f69b461ab" "checksum winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "afc5508759c5bf4285e61feb862b6083c8480aec864fa17a81fdec6f69b461ab"
"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
"checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
"checksum yaml-rust 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "95acf0db5515d07da9965ec0e0ba6cc2d825e2caeb7303b66ca441729801254e" "checksum yaml-rust 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "95acf0db5515d07da9965ec0e0ba6cc2d825e2caeb7303b66ca441729801254e"

4
crates/ra_vfs/Cargo.toml
View file

@ -10,9 +10,13 @@ relative-path = "0.4.0"
rustc-hash = "1.0" rustc-hash = "1.0"
crossbeam-channel = "0.3.5" crossbeam-channel = "0.3.5"
log = "0.4.6" log = "0.4.6"
notify = "4.0.7"
drop_bomb = "0.1.0"
parking_lot = "0.7.0"
thread_worker = { path = "../thread_worker" } thread_worker = { path = "../thread_worker" }
ra_arena = { path = "../ra_arena" } ra_arena = { path = "../ra_arena" }
[dev-dependencies] [dev-dependencies]
tempfile = "3" tempfile = "3"
flexi_logger = "0.10.0"

131
crates/ra_vfs/src/io.rs
View file

@ -1,55 +1,109 @@
use std::{ use std::{fs, sync::Arc, thread};
fmt,
fs,
path::{Path, PathBuf},
};
use walkdir::{DirEntry, WalkDir}; use crossbeam_channel::{Receiver, Sender};
use thread_worker::{WorkerHandle};
use relative_path::RelativePathBuf; use relative_path::RelativePathBuf;
use thread_worker::WorkerHandle;
use walkdir::WalkDir;
use crate::{VfsRoot, has_rs_extension}; mod watcher;
use watcher::Watcher;
pub(crate) struct Task { use crate::{RootFilter, Roots, VfsRoot};
pub(crate) root: VfsRoot,
pub(crate) path: PathBuf, pub(crate) enum Task {
pub(crate) filter: Box<Fn(&DirEntry) -> bool + Send>, AddRoot {
root: VfsRoot,
filter: Arc<RootFilter>,
},
} }
pub struct TaskResult { #[derive(Debug)]
pub(crate) root: VfsRoot, pub enum TaskResult {
pub(crate) files: Vec<(RelativePathBuf, String)>, BulkLoadRoot {
root: VfsRoot,
files: Vec<(RelativePathBuf, String)>,
},
AddSingleFile {
root: VfsRoot,
path: RelativePathBuf,
text: String,
},
ChangeSingleFile {
root: VfsRoot,
path: RelativePathBuf,
text: String,
},
RemoveSingleFile {
root: VfsRoot,
path: RelativePathBuf,
},
} }
impl fmt::Debug for TaskResult { pub(crate) struct Worker {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { worker: thread_worker::Worker<Task, TaskResult>,
f.write_str("TaskResult { ... }") worker_handle: WorkerHandle,
}
} }
pub(crate) type Worker = thread_worker::Worker<Task, TaskResult>; impl Worker {
pub(crate) fn start(roots: Arc<Roots>) -> Worker {
pub(crate) fn start() -> (Worker, WorkerHandle) { let (worker, worker_handle) =
thread_worker::spawn("vfs", 128, |input_receiver, output_sender| { thread_worker::spawn("vfs", 128, move |input_receiver, output_sender| {
input_receiver let mut watcher = match Watcher::start(roots, output_sender.clone()) {
Ok(w) => Some(w),
Err(e) => {
log::error!("could not start watcher: {}", e);
None
}
};
let res = input_receiver
.into_iter() .into_iter()
.map(handle_task) .filter_map(|t| handle_task(t, &mut watcher))
.try_for_each(|it| output_sender.send(it)) .try_for_each(|it| output_sender.send(it));
.unwrap() if let Some(watcher) = watcher {
}) let _ = watcher.shutdown();
}
res.unwrap()
});
Worker {
worker,
worker_handle,
}
} }
fn handle_task(task: Task) -> TaskResult { pub(crate) fn sender(&self) -> &Sender<Task> {
let Task { root, path, filter } = task; &self.worker.inp
log::debug!("loading {} ...", path.as_path().display());
let files = load_root(path.as_path(), &*filter);
log::debug!("... loaded {}", path.as_path().display());
TaskResult { root, files }
} }
fn load_root(root: &Path, filter: &dyn Fn(&DirEntry) -> bool) -> Vec<(RelativePathBuf, String)> { pub(crate) fn receiver(&self) -> &Receiver<TaskResult> {
&self.worker.out
}
pub(crate) fn shutdown(self) -> thread::Result<()> {
let _ = self.worker.shutdown();
self.worker_handle.shutdown()
}
}
fn handle_task(task: Task, watcher: &mut Option<Watcher>) -> Option<TaskResult> {
match task {
Task::AddRoot { root, filter } => {
if let Some(watcher) = watcher {
watcher.watch_root(&filter)
}
log::debug!("loading {} ...", filter.root.as_path().display());
let files = load_root(filter.as_ref());
log::debug!("... loaded {}", filter.root.as_path().display());
Some(TaskResult::BulkLoadRoot { root, files })
}
}
}
fn load_root(filter: &RootFilter) -> Vec<(RelativePathBuf, String)> {
let mut res = Vec::new(); let mut res = Vec::new();
for entry in WalkDir::new(root).into_iter().filter_entry(filter) { for entry in WalkDir::new(&filter.root)
.into_iter()
.filter_entry(filter.entry_filter())
{
let entry = match entry { let entry = match entry {
Ok(entry) => entry, Ok(entry) => entry,
Err(e) => { Err(e) => {
@ -61,9 +115,6 @@ fn load_root(root: &Path, filter: &dyn Fn(&DirEntry) -> bool) -> Vec<(RelativePa
continue; continue;
} }
let path = entry.path(); let path = entry.path();
if !has_rs_extension(path) {
continue;
}
let text = match fs::read_to_string(path) { let text = match fs::read_to_string(path) {
Ok(text) => text, Ok(text) => text,
Err(e) => { Err(e) => {
@ -71,7 +122,7 @@ fn load_root(root: &Path, filter: &dyn Fn(&DirEntry) -> bool) -> Vec<(RelativePa
continue; continue;
} }
}; };
let path = RelativePathBuf::from_path(path.strip_prefix(root).unwrap()).unwrap(); let path = RelativePathBuf::from_path(path.strip_prefix(&filter.root).unwrap()).unwrap();
res.push((path.to_owned(), text)) res.push((path.to_owned(), text))
} }
res res

200
crates/ra_vfs/src/io/watcher.rs Normal file
View file

@ -0,0 +1,200 @@
use crate::{io, RootFilter, Roots, VfsRoot};
use crossbeam_channel::Sender;
use drop_bomb::DropBomb;
use notify::{DebouncedEvent, RecommendedWatcher, RecursiveMode, Watcher as NotifyWatcher};
use parking_lot::Mutex;
use std::{
fs,
path::{Path, PathBuf},
sync::{mpsc, Arc},
thread,
time::Duration,
};
use walkdir::WalkDir;
#[derive(Debug)]
enum ChangeKind {
Create,
Write,
Remove,
}
const WATCHER_DELAY: Duration = Duration::from_millis(250);
pub(crate) struct Watcher {
thread: thread::JoinHandle<()>,
bomb: DropBomb,
watcher: Arc<Mutex<Option<RecommendedWatcher>>>,
}
impl Watcher {
pub(crate) fn start(
roots: Arc<Roots>,
output_sender: Sender<io::TaskResult>,
) -> Result<Watcher, Box<std::error::Error>> {
let (input_sender, input_receiver) = mpsc::channel();
let watcher = Arc::new(Mutex::new(Some(notify::watcher(
input_sender,
WATCHER_DELAY,
)?)));
let sender = output_sender.clone();
let watcher_clone = watcher.clone();
let thread = thread::spawn(move || {
let worker = WatcherWorker {
roots,
watcher: watcher_clone,
sender,
};
input_receiver
.into_iter()
// forward relevant events only
.try_for_each(|change| worker.handle_debounced_event(change))
.unwrap()
});
Ok(Watcher {
thread,
watcher,
bomb: DropBomb::new(format!("Watcher was not shutdown")),
})
}
pub fn watch_root(&mut self, filter: &RootFilter) {
for res in WalkDir::new(&filter.root)
.into_iter()
.filter_entry(filter.entry_filter())
{
match res {
Ok(entry) => {
if entry.file_type().is_dir() {
watch_one(self.watcher.as_ref(), entry.path());
}
}
Err(e) => log::warn!("watcher error: {}", e),
}
}
}
pub fn shutdown(mut self) -> thread::Result<()> {
self.bomb.defuse();
drop(self.watcher.lock().take());
let res = self.thread.join();
match &res {
Ok(()) => log::info!("... Watcher terminated with ok"),
Err(_) => log::error!("... Watcher terminated with err"),
}
res
}
}
struct WatcherWorker {
watcher: Arc<Mutex<Option<RecommendedWatcher>>>,
roots: Arc<Roots>,
sender: Sender<io::TaskResult>,
}
impl WatcherWorker {
fn handle_debounced_event(&self, ev: DebouncedEvent) -> Result<(), Box<std::error::Error>> {
match ev {
DebouncedEvent::NoticeWrite(_)
| DebouncedEvent::NoticeRemove(_)
| DebouncedEvent::Chmod(_) => {
// ignore
}
DebouncedEvent::Rescan => {
// TODO rescan all roots
}
DebouncedEvent::Create(path) => {
self.handle_change(path, ChangeKind::Create);
}
DebouncedEvent::Write(path) => {
self.handle_change(path, ChangeKind::Write);
}
DebouncedEvent::Remove(path) => {
self.handle_change(path, ChangeKind::Remove);
}
DebouncedEvent::Rename(src, dst) => {
self.handle_change(src, ChangeKind::Remove);
self.handle_change(dst, ChangeKind::Create);
}
DebouncedEvent::Error(err, path) => {
// TODO should we reload the file contents?
log::warn!("watcher error \"{}\", {:?}", err, path);
}
}
Ok(())
}
fn handle_change(&self, path: PathBuf, kind: ChangeKind) {
if let Err(e) = self.try_handle_change(path, kind) {
log::warn!("watcher error: {}", e)
}
}
fn try_handle_change(
&self,
path: PathBuf,
kind: ChangeKind,
) -> Result<(), Box<std::error::Error>> {
let (root, rel_path) = match self.roots.find(&path) {
Some(x) => x,
None => return Ok(()),
};
match kind {
ChangeKind::Create => {
if path.is_dir() {
self.watch_recursive(&path, root);
} else {
let text = fs::read_to_string(&path)?;
self.sender.send(io::TaskResult::AddSingleFile {
root,
path: rel_path,
text,
})?
}
}
ChangeKind::Write => {
let text = fs::read_to_string(&path)?;
self.sender.send(io::TaskResult::ChangeSingleFile {
root,
path: rel_path,
text,
})?
}
ChangeKind::Remove => self.sender.send(io::TaskResult::RemoveSingleFile {
root,
path: rel_path,
})?,
}
Ok(())
}
fn watch_recursive(&self, dir: &Path, root: VfsRoot) {
let filter = &self.roots[root];
for res in WalkDir::new(dir)
.into_iter()
.filter_entry(filter.entry_filter())
{
match res {
Ok(entry) => {
if entry.file_type().is_dir() {
watch_one(self.watcher.as_ref(), entry.path());
} else {
// emit only for files otherwise we will cause watch_recursive to be called again with a dir that we are already watching
// emit as create because we haven't seen it yet
self.handle_change(entry.path().to_path_buf(), ChangeKind::Create);
}
}
Err(e) => log::warn!("watcher error: {}", e),
}
}
}
}
fn watch_one(watcher: &Mutex<Option<RecommendedWatcher>>, dir: &Path) {
if let Some(watcher) = watcher.lock().as_mut() {
match watcher.watch(dir, RecursiveMode::NonRecursive) {
Ok(()) => log::debug!("watching \"{}\"", dir.display()),
Err(e) => log::warn!("could not watch \"{}\": {}", dir.display(), e),
}
}
}

331
crates/ra_vfs/src/lib.rs
View file

@ -16,52 +16,77 @@
mod io; mod io;
use std::{ use std::{
fmt,
mem,
thread,
cmp::Reverse, cmp::Reverse,
fmt, fs, mem,
ops::{Deref, DerefMut},
path::{Path, PathBuf}, path::{Path, PathBuf},
ffi::OsStr,
sync::Arc, sync::Arc,
fs, thread,
}; };
use rustc_hash::{FxHashMap, FxHashSet};
use relative_path::RelativePathBuf;
use crossbeam_channel::Receiver; use crossbeam_channel::Receiver;
use ra_arena::{impl_arena_id, Arena, RawId};
use relative_path::{Component, RelativePath, RelativePathBuf};
use rustc_hash::{FxHashMap, FxHashSet};
use walkdir::DirEntry; use walkdir::DirEntry;
use thread_worker::WorkerHandle;
use ra_arena::{Arena, RawId, impl_arena_id};
pub use crate::io::TaskResult as VfsTask; pub use crate::io::TaskResult as VfsTask;
use io::{TaskResult, Worker};
/// `RootFilter` is a predicate that checks if a file can belong to a root. If /// `RootFilter` is a predicate that checks if a file can belong to a root. If
/// several filters match a file (nested dirs), the most nested one wins. /// several filters match a file (nested dirs), the most nested one wins.
struct RootFilter { pub(crate) struct RootFilter {
root: PathBuf, root: PathBuf,
file_filter: fn(&Path) -> bool, filter: fn(&Path, &RelativePath) -> bool,
excluded_dirs: Vec<PathBuf>,
} }
impl RootFilter { impl RootFilter {
fn new(root: PathBuf) -> RootFilter { fn new(root: PathBuf, excluded_dirs: Vec<PathBuf>) -> RootFilter {
RootFilter { RootFilter {
root, root,
file_filter: has_rs_extension, filter: default_filter,
excluded_dirs,
} }
} }
/// Check if this root can contain `path`. NB: even if this returns /// Check if this root can contain `path`. NB: even if this returns
/// true, the `path` might actually be conained in some nested root. /// true, the `path` might actually be conained in some nested root.
fn can_contain(&self, path: &Path) -> Option<RelativePathBuf> { pub(crate) fn can_contain(&self, path: &Path) -> Option<RelativePathBuf> {
if !(self.file_filter)(path) { let rel_path = path.strip_prefix(&self.root).ok()?;
let rel_path = RelativePathBuf::from_path(rel_path).ok()?;
if !(self.filter)(path, rel_path.as_relative_path()) {
return None; return None;
} }
let path = path.strip_prefix(&self.root).ok()?; Some(rel_path)
RelativePathBuf::from_path(path).ok() }
pub(crate) fn entry_filter<'a>(&'a self) -> impl FnMut(&DirEntry) -> bool + 'a {
move |entry: &DirEntry| {
if entry.file_type().is_dir() && self.excluded_dirs.iter().any(|it| it == entry.path())
{
// do not walk nested roots
false
} else {
self.can_contain(entry.path()).is_some()
}
}
} }
} }
fn has_rs_extension(p: &Path) -> bool { pub(crate) fn default_filter(path: &Path, rel_path: &RelativePath) -> bool {
p.extension() == Some(OsStr::new("rs")) if path.is_dir() {
for (i, c) in rel_path.components().enumerate() {
if let Component::Normal(c) = c {
// TODO hardcoded for now
if (i == 0 && c == "target") || c == ".git" || c == "node_modules" {
return false;
}
}
}
true
} else {
rel_path.extension() == Some("rs")
}
} }
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
@ -75,16 +100,58 @@ impl_arena_id!(VfsFile);
struct VfsFileData { struct VfsFileData {
root: VfsRoot, root: VfsRoot,
path: RelativePathBuf, path: RelativePathBuf,
is_overlayed: bool,
text: Arc<String>, text: Arc<String>,
} }
pub(crate) struct Roots {
roots: Arena<VfsRoot, Arc<RootFilter>>,
}
impl Roots {
pub(crate) fn new(mut paths: Vec<PathBuf>) -> Roots {
let mut roots = Arena::default();
// A hack to make nesting work.
paths.sort_by_key(|it| Reverse(it.as_os_str().len()));
for (i, path) in paths.iter().enumerate() {
let nested_roots = paths[..i]
.iter()
.filter(|it| it.starts_with(path))
.map(|it| it.clone())
.collect::<Vec<_>>();
let root_filter = Arc::new(RootFilter::new(path.clone(), nested_roots));
roots.alloc(root_filter.clone());
}
Roots { roots }
}
pub(crate) fn find(&self, path: &Path) -> Option<(VfsRoot, RelativePathBuf)> {
self.roots
.iter()
.find_map(|(root, data)| data.can_contain(path).map(|it| (root, it)))
}
}
impl Deref for Roots {
type Target = Arena<VfsRoot, Arc<RootFilter>>;
fn deref(&self) -> &Self::Target {
&self.roots
}
}
impl DerefMut for Roots {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.roots
}
}
pub struct Vfs { pub struct Vfs {
roots: Arena<VfsRoot, RootFilter>, roots: Arc<Roots>,
files: Arena<VfsFile, VfsFileData>, files: Arena<VfsFile, VfsFileData>,
root2files: FxHashMap<VfsRoot, FxHashSet<VfsFile>>, root2files: FxHashMap<VfsRoot, FxHashSet<VfsFile>>,
pending_changes: Vec<VfsChange>, pending_changes: Vec<VfsChange>,
worker: io::Worker, worker: Worker,
worker_handle: WorkerHandle,
} }
impl fmt::Debug for Vfs { impl fmt::Debug for Vfs {
@ -94,44 +161,30 @@ impl fmt::Debug for Vfs {
} }
impl Vfs { impl Vfs {
pub fn new(mut roots: Vec<PathBuf>) -> (Vfs, Vec<VfsRoot>) { pub fn new(roots: Vec<PathBuf>) -> (Vfs, Vec<VfsRoot>) {
let (worker, worker_handle) = io::start(); let roots = Arc::new(Roots::new(roots));
let worker = io::Worker::start(roots.clone());
let mut root2files = FxHashMap::default();
let mut res = Vfs { for (root, filter) in roots.iter() {
roots: Arena::default(), root2files.insert(root, Default::default());
worker
.sender()
.send(io::Task::AddRoot {
root,
filter: filter.clone(),
})
.unwrap();
}
let res = Vfs {
roots,
files: Arena::default(), files: Arena::default(),
root2files: FxHashMap::default(), root2files,
worker, worker,
worker_handle,
pending_changes: Vec::new(), pending_changes: Vec::new(),
}; };
let vfs_roots = res.roots.iter().map(|(id, _)| id).collect();
// A hack to make nesting work. (res, vfs_roots)
roots.sort_by_key(|it| Reverse(it.as_os_str().len()));
for (i, path) in roots.iter().enumerate() {
let root = res.roots.alloc(RootFilter::new(path.clone()));
res.root2files.insert(root, Default::default());
let nested = roots[..i]
.iter()
.filter(|it| it.starts_with(path))
.map(|it| it.clone())
.collect::<Vec<_>>();
let filter = move |entry: &DirEntry| {
if entry.file_type().is_file() {
has_rs_extension(entry.path())
} else {
nested.iter().all(|it| it != entry.path())
}
};
let task = io::Task {
root,
path: path.clone(),
filter: Box::new(filter),
};
res.worker.inp.send(task).unwrap();
}
let roots = res.roots.iter().map(|(id, _)| id).collect();
(res, roots)
} }
pub fn root2path(&self, root: VfsRoot) -> PathBuf { pub fn root2path(&self, root: VfsRoot) -> PathBuf {
@ -165,7 +218,7 @@ impl Vfs {
} else { } else {
let text = fs::read_to_string(path).unwrap_or_default(); let text = fs::read_to_string(path).unwrap_or_default();
let text = Arc::new(text); let text = Arc::new(text);
let file = self.add_file(root, rel_path.clone(), Arc::clone(&text)); let file = self.add_file(root, rel_path.clone(), Arc::clone(&text), false);
let change = VfsChange::AddFile { let change = VfsChange::AddFile {
file, file,
text, text,
@ -180,85 +233,130 @@ impl Vfs {
} }
pub fn task_receiver(&self) -> &Receiver<io::TaskResult> { pub fn task_receiver(&self) -> &Receiver<io::TaskResult> {
&self.worker.out self.worker.receiver()
} }
pub fn handle_task(&mut self, task: io::TaskResult) { pub fn handle_task(&mut self, task: io::TaskResult) {
let mut files = Vec::new(); match task {
TaskResult::BulkLoadRoot { root, files } => {
let mut cur_files = Vec::new();
// While we were scanning the root in the backgound, a file might have // While we were scanning the root in the backgound, a file might have
// been open in the editor, so we need to account for that. // been open in the editor, so we need to account for that.
let exising = self.root2files[&task.root] let exising = self.root2files[&root]
.iter() .iter()
.map(|&file| (self.files[file].path.clone(), file)) .map(|&file| (self.files[file].path.clone(), file))
.collect::<FxHashMap<_, _>>(); .collect::<FxHashMap<_, _>>();
for (path, text) in task.files { for (path, text) in files {
if let Some(&file) = exising.get(&path) { if let Some(&file) = exising.get(&path) {
let text = Arc::clone(&self.files[file].text); let text = Arc::clone(&self.files[file].text);
files.push((file, path, text)); cur_files.push((file, path, text));
continue; continue;
} }
let text = Arc::new(text); let text = Arc::new(text);
let file = self.add_file(task.root, path.clone(), Arc::clone(&text)); let file = self.add_file(root, path.clone(), Arc::clone(&text), false);
files.push((file, path, text)); cur_files.push((file, path, text));
} }
let change = VfsChange::AddRoot { let change = VfsChange::AddRoot {
root: task.root, root,
files, files: cur_files,
}; };
self.pending_changes.push(change); self.pending_changes.push(change);
} }
TaskResult::AddSingleFile { root, path, text } => {
self.do_add_file(root, path, text, false);
}
TaskResult::ChangeSingleFile { root, path, text } => {
if let Some(file) = self.find_file(root, &path) {
self.do_change_file(file, text, false);
} else {
self.do_add_file(root, path, text, false);
}
}
TaskResult::RemoveSingleFile { root, path } => {
if let Some(file) = self.find_file(root, &path) {
self.do_remove_file(root, path, file, false);
}
}
}
}
fn do_add_file(
&mut self,
root: VfsRoot,
path: RelativePathBuf,
text: String,
is_overlay: bool,
) -> Option<VfsFile> {
let text = Arc::new(text);
let file = self.add_file(root, path.clone(), text.clone(), is_overlay);
self.pending_changes.push(VfsChange::AddFile {
file,
root,
path,
text,
});
Some(file)
}
fn do_change_file(&mut self, file: VfsFile, text: String, is_overlay: bool) {
if !is_overlay && self.files[file].is_overlayed {
return;
}
let text = Arc::new(text);
self.change_file(file, text.clone(), is_overlay);
self.pending_changes
.push(VfsChange::ChangeFile { file, text });
}
fn do_remove_file(
&mut self,
root: VfsRoot,
path: RelativePathBuf,
file: VfsFile,
is_overlay: bool,
) {
if !is_overlay && self.files[file].is_overlayed {
return;
}
self.remove_file(file);
self.pending_changes
.push(VfsChange::RemoveFile { root, path, file });
}
pub fn add_file_overlay(&mut self, path: &Path, text: String) -> Option<VfsFile> { pub fn add_file_overlay(&mut self, path: &Path, text: String) -> Option<VfsFile> {
let mut res = None; if let Some((root, rel_path, file)) = self.find_root(path) {
if let Some((root, path, file)) = self.find_root(path) { if let Some(file) = file {
let text = Arc::new(text); self.do_change_file(file, text, true);
let change = if let Some(file) = file { Some(file)
res = Some(file);
self.change_file(file, Arc::clone(&text));
VfsChange::ChangeFile { file, text }
} else { } else {
let file = self.add_file(root, path.clone(), Arc::clone(&text)); self.do_add_file(root, rel_path, text, true)
res = Some(file);
VfsChange::AddFile {
file,
text,
root,
path,
} }
}; } else {
self.pending_changes.push(change); None
} }
res
} }
pub fn change_file_overlay(&mut self, path: &Path, new_text: String) { pub fn change_file_overlay(&mut self, path: &Path, new_text: String) {
if let Some((_root, _path, file)) = self.find_root(path) { if let Some((_root, _path, file)) = self.find_root(path) {
let file = file.expect("can't change a file which wasn't added"); let file = file.expect("can't change a file which wasn't added");
let text = Arc::new(new_text); self.do_change_file(file, new_text, true);
self.change_file(file, Arc::clone(&text));
let change = VfsChange::ChangeFile { file, text };
self.pending_changes.push(change);
} }
} }
pub fn remove_file_overlay(&mut self, path: &Path) -> Option<VfsFile> { pub fn remove_file_overlay(&mut self, path: &Path) -> Option<VfsFile> {
let mut res = None;
if let Some((root, path, file)) = self.find_root(path) { if let Some((root, path, file)) = self.find_root(path) {
let file = file.expect("can't remove a file which wasn't added"); let file = file.expect("can't remove a file which wasn't added");
res = Some(file);
let full_path = path.to_path(&self.roots[root].root); let full_path = path.to_path(&self.roots[root].root);
let change = if let Ok(text) = fs::read_to_string(&full_path) { if let Ok(text) = fs::read_to_string(&full_path) {
let text = Arc::new(text); self.do_change_file(file, text, true);
self.change_file(file, Arc::clone(&text));
VfsChange::ChangeFile { file, text }
} else { } else {
self.remove_file(file); self.do_remove_file(root, path, file, true);
VfsChange::RemoveFile { root, file, path } }
}; Some(file)
self.pending_changes.push(change); } else {
None
} }
res
} }
pub fn commit_changes(&mut self) -> Vec<VfsChange> { pub fn commit_changes(&mut self) -> Vec<VfsChange> {
@ -267,19 +365,31 @@ impl Vfs {
/// Sutdown the VFS and terminate the background watching thread. /// Sutdown the VFS and terminate the background watching thread.
pub fn shutdown(self) -> thread::Result<()> { pub fn shutdown(self) -> thread::Result<()> {
let _ = self.worker.shutdown(); self.worker.shutdown()
self.worker_handle.shutdown()
} }
fn add_file(&mut self, root: VfsRoot, path: RelativePathBuf, text: Arc<String>) -> VfsFile { fn add_file(
let data = VfsFileData { root, path, text }; &mut self,
root: VfsRoot,
path: RelativePathBuf,
text: Arc<String>,
is_overlayed: bool,
) -> VfsFile {
let data = VfsFileData {
root,
path,
text,
is_overlayed,
};
let file = self.files.alloc(data); let file = self.files.alloc(data);
self.root2files.get_mut(&root).unwrap().insert(file); self.root2files.get_mut(&root).unwrap().insert(file);
file file
} }
fn change_file(&mut self, file: VfsFile, new_text: Arc<String>) { fn change_file(&mut self, file: VfsFile, new_text: Arc<String>, is_overlayed: bool) {
self.files[file].text = new_text; let mut file_data = &mut self.files[file];
file_data.text = new_text;
file_data.is_overlayed = is_overlayed;
} }
fn remove_file(&mut self, file: VfsFile) { fn remove_file(&mut self, file: VfsFile) {
@ -292,15 +402,16 @@ impl Vfs {
} }
fn find_root(&self, path: &Path) -> Option<(VfsRoot, RelativePathBuf, Option<VfsFile>)> { fn find_root(&self, path: &Path) -> Option<(VfsRoot, RelativePathBuf, Option<VfsFile>)> {
let (root, path) = self let (root, path) = self.roots.find(&path)?;
.roots let file = self.find_file(root, &path);
.iter() Some((root, path, file))
.find_map(|(root, data)| data.can_contain(path).map(|it| (root, it)))?; }
let file = self.root2files[&root]
fn find_file(&self, root: VfsRoot, path: &RelativePath) -> Option<VfsFile> {
self.root2files[&root]
.iter() .iter()
.map(|&it| it) .map(|&it| it)
.find(|&file| self.files[file].path == path); .find(|&file| self.files[file].path == path)
Some((root, path, file))
} }
} }

154
crates/ra_vfs/tests/vfs.rs
View file

@ -1,24 +1,47 @@
use std::{ use std::{collections::HashSet, fs, time::Duration};
fs,
collections::HashSet,
};
// use flexi_logger::Logger;
use crossbeam_channel::RecvTimeoutError;
use ra_vfs::{Vfs, VfsChange};
use tempfile::tempdir; use tempfile::tempdir;
use ra_vfs::{Vfs, VfsChange}; fn process_tasks(vfs: &mut Vfs, num_tasks: u32) {
for _ in 0..num_tasks {
let task = vfs
.task_receiver()
.recv_timeout(Duration::from_secs(3))
.unwrap();
log::debug!("{:?}", task);
vfs.handle_task(task);
}
}
macro_rules! assert_match {
($x:expr, $pat:pat) => {
assert_match!($x, $pat, ())
};
($x:expr, $pat:pat, $assert:expr) => {
match $x {
$pat => $assert,
x => assert!(false, "Expected {}, got {:?}", stringify!($pat), x),
};
};
}
#[test] #[test]
fn test_vfs_works() -> std::io::Result<()> { fn test_vfs_works() -> std::io::Result<()> {
// Logger::with_str("vfs=debug,ra_vfs=debug").start().unwrap();
let files = [ let files = [
("a/foo.rs", "hello"), ("a/foo.rs", "hello"),
("a/bar.rs", "world"), ("a/bar.rs", "world"),
("a/b/baz.rs", "nested hello"), ("a/b/baz.rs", "nested hello"),
]; ];
let dir = tempdir()?; let dir = tempdir().unwrap();
for (path, text) in files.iter() { for (path, text) in files.iter() {
let file_path = dir.path().join(path); let file_path = dir.path().join(path);
fs::create_dir_all(file_path.parent().unwrap())?; fs::create_dir_all(file_path.parent().unwrap()).unwrap();
fs::write(file_path, text)? fs::write(file_path, text)?
} }
@ -26,10 +49,7 @@ fn test_vfs_works() -> std::io::Result<()> {
let b_root = dir.path().join("a/b"); let b_root = dir.path().join("a/b");
let (mut vfs, _) = Vfs::new(vec![a_root, b_root]); let (mut vfs, _) = Vfs::new(vec![a_root, b_root]);
for _ in 0..2 { process_tasks(&mut vfs, 2);
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
}
{ {
let files = vfs let files = vfs
.commit_changes() .commit_changes()
@ -58,43 +78,101 @@ fn test_vfs_works() -> std::io::Result<()> {
assert_eq!(files, expected_files); assert_eq!(files, expected_files);
} }
vfs.add_file_overlay(&dir.path().join("a/b/baz.rs"), "quux".to_string()); fs::write(&dir.path().join("a/b/baz.rs"), "quux").unwrap();
let change = vfs.commit_changes().pop().unwrap(); process_tasks(&mut vfs, 1);
match change { assert_match!(
VfsChange::ChangeFile { text, .. } => assert_eq!(&*text, "quux"), vfs.commit_changes().as_slice(),
_ => panic!("unexpected change"), [VfsChange::ChangeFile { text, .. }],
} assert_eq!(text.as_str(), "quux")
);
vfs.change_file_overlay(&dir.path().join("a/b/baz.rs"), "m".to_string()); vfs.add_file_overlay(&dir.path().join("a/b/baz.rs"), "m".to_string());
let change = vfs.commit_changes().pop().unwrap(); assert_match!(
match change { vfs.commit_changes().as_slice(),
VfsChange::ChangeFile { text, .. } => assert_eq!(&*text, "m"), [VfsChange::ChangeFile { text, .. }],
_ => panic!("unexpected change"), assert_eq!(text.as_str(), "m")
} );
// changing file on disk while overlayed doesn't generate a VfsChange
fs::write(&dir.path().join("a/b/baz.rs"), "corge").unwrap();
process_tasks(&mut vfs, 1);
assert_match!(vfs.commit_changes().as_slice(), []);
// removing overlay restores data on disk
vfs.remove_file_overlay(&dir.path().join("a/b/baz.rs")); vfs.remove_file_overlay(&dir.path().join("a/b/baz.rs"));
let change = vfs.commit_changes().pop().unwrap(); assert_match!(
match change { vfs.commit_changes().as_slice(),
VfsChange::ChangeFile { text, .. } => assert_eq!(&*text, "nested hello"), [VfsChange::ChangeFile { text, .. }],
_ => panic!("unexpected change"), assert_eq!(text.as_str(), "corge")
} );
vfs.add_file_overlay(&dir.path().join("a/b/spam.rs"), "spam".to_string()); vfs.add_file_overlay(&dir.path().join("a/b/spam.rs"), "spam".to_string());
let change = vfs.commit_changes().pop().unwrap(); assert_match!(
match change { vfs.commit_changes().as_slice(),
VfsChange::AddFile { text, path, .. } => { [VfsChange::AddFile { text, path, .. }],
assert_eq!(&*text, "spam"); {
assert_eq!(text.as_str(), "spam");
assert_eq!(path, "spam.rs"); assert_eq!(path, "spam.rs");
} }
_ => panic!("unexpected change"), );
}
vfs.remove_file_overlay(&dir.path().join("a/b/spam.rs")); vfs.remove_file_overlay(&dir.path().join("a/b/spam.rs"));
let change = vfs.commit_changes().pop().unwrap(); assert_match!(
match change { vfs.commit_changes().as_slice(),
VfsChange::RemoveFile { .. } => (), [VfsChange::RemoveFile { path, .. }],
_ => panic!("unexpected change"), assert_eq!(path, "spam.rs")
);
fs::create_dir_all(dir.path().join("a/sub1/sub2")).unwrap();
fs::write(dir.path().join("a/sub1/sub2/new.rs"), "new hello").unwrap();
process_tasks(&mut vfs, 1);
assert_match!(
vfs.commit_changes().as_slice(),
[VfsChange::AddFile { text, path, .. }],
{
assert_eq!(text.as_str(), "new hello");
assert_eq!(path, "sub1/sub2/new.rs");
} }
);
fs::rename(
&dir.path().join("a/sub1/sub2/new.rs"),
&dir.path().join("a/sub1/sub2/new1.rs"),
)
.unwrap();
process_tasks(&mut vfs, 2);
assert_match!(
vfs.commit_changes().as_slice(),
[VfsChange::RemoveFile {
path: removed_path, ..
}, VfsChange::AddFile {
text,
path: added_path,
..
}],
{
assert_eq!(removed_path, "sub1/sub2/new.rs");
assert_eq!(added_path, "sub1/sub2/new1.rs");
assert_eq!(text.as_str(), "new hello");
}
);
fs::remove_file(&dir.path().join("a/sub1/sub2/new1.rs")).unwrap();
process_tasks(&mut vfs, 1);
assert_match!(
vfs.commit_changes().as_slice(),
[VfsChange::RemoveFile { path, .. }],
assert_eq!(path, "sub1/sub2/new1.rs")
);
// should be ignored
fs::create_dir_all(dir.path().join("a/target")).unwrap();
fs::write(&dir.path().join("a/target/new.rs"), "ignore me").unwrap();
assert_match!(
vfs.task_receiver().recv_timeout(Duration::from_millis(300)), // slightly more than watcher debounce delay
Err(RecvTimeoutError::Timeout)
);
vfs.shutdown().unwrap(); vfs.shutdown().unwrap();
Ok(()) Ok(())