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handle watched events filtering in Vfsadd is_overlayedload changed files contents in io

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Bernardo 2019-01-12 18:17:52 +01:00 committed by Aleksey Kladov
parent 6b86f038d6
commit 76bf7498aa
5 changed files with 221 additions and 146 deletions
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2
Cargo.lock generated
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@ -1009,7 +1009,7 @@ version = "0.1.0"
dependencies = [
"crossbeam-channel 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
"drop_bomb 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
"flexi_logger 0.10.3 (registry+https://github.com/rust-lang/crates.io-index)",
"flexi_logger 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
"log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
"notify 4.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
"ra_arena 0.1.0",

74
crates/ra_vfs/src/io.rs
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@ -1,14 +1,13 @@
use std::{
fmt,
fs,
fmt, fs,
path::{Path, PathBuf},
};
use walkdir::{DirEntry, WalkDir};
use thread_worker::{WorkerHandle};
use relative_path::RelativePathBuf;
use thread_worker::WorkerHandle;
use walkdir::{DirEntry, WalkDir};
use crate::{VfsRoot, has_rs_extension};
use crate::{has_rs_extension, watcher::WatcherChange, VfsRoot};
pub(crate) enum Task {
AddRoot {
@ -16,7 +15,7 @@ pub(crate) enum Task {
path: PathBuf,
filter: Box<Fn(&DirEntry) -> bool + Send>,
},
WatcherChange(crate::watcher::WatcherChange),
LoadChange(crate::watcher::WatcherChange),
}
#[derive(Debug)]
@ -26,29 +25,16 @@ pub struct AddRootResult {
}
#[derive(Debug)]
pub enum WatcherChangeResult {
Create {
path: PathBuf,
text: String,
},
Write {
path: PathBuf,
text: String,
},
Remove {
path: PathBuf,
},
// can this be replaced and use Remove and Create instead?
Rename {
src: PathBuf,
dst: PathBuf,
text: String,
},
pub enum WatcherChangeData {
Create { path: PathBuf, text: String },
Write { path: PathBuf, text: String },
Remove { path: PathBuf },
}
pub enum TaskResult {
AddRoot(AddRootResult),
WatcherChange(WatcherChangeResult),
HandleChange(WatcherChange),
LoadChange(Option<WatcherChangeData>),
}
impl fmt::Debug for TaskResult {
@ -77,9 +63,10 @@ fn handle_task(task: Task) -> TaskResult {
log::debug!("... loaded {}", path.as_path().display());
TaskResult::AddRoot(AddRootResult { root, files })
}
Task::WatcherChange(change) => {
// TODO
unimplemented!()
Task::LoadChange(change) => {
log::debug!("loading {:?} ...", change);
let data = load_change(change);
TaskResult::LoadChange(data)
}
}
}
@ -113,3 +100,34 @@ fn load_root(root: &Path, filter: &dyn Fn(&DirEntry) -> bool) -> Vec<(RelativePa
}
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)
}

163
crates/ra_vfs/src/lib.rs
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@ -75,6 +75,7 @@ pub(crate) fn has_rs_extension(p: &Path) -> bool {
struct VfsFileData {
root: VfsRoot,
path: RelativePathBuf,
is_overlayed: bool,
text: Arc<String>,
}
@ -170,7 +171,7 @@ pub fn load(&mut self, path: &Path) -> Option<VfsFile> {
} else {
let text = fs::read_to_string(path).unwrap_or_default();
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 {
file,
text,
@ -205,7 +206,7 @@ pub fn handle_task(&mut self, task: io::TaskResult) {
continue;
}
let text = Arc::new(text);
let file = self.add_file(task.root, path.clone(), Arc::clone(&text));
let file = self.add_file(task.root, path.clone(), Arc::clone(&text), false);
files.push((file, path, text));
}
@ -215,63 +216,132 @@ pub fn handle_task(&mut self, task: io::TaskResult) {
};
self.pending_changes.push(change);
}
io::TaskResult::WatcherChange(change) => {
// TODO
unimplemented!()
io::TaskResult::HandleChange(change) => match &change {
watcher::WatcherChange::Create(path)
| watcher::WatcherChange::Remove(path)
| watcher::WatcherChange::Write(path) => {
if self.should_handle_change(&path) {
self.worker.inp.send(io::Task::LoadChange(change)).unwrap()
}
}
watcher::WatcherChange::Rescan => {
// TODO send Task::AddRoot?
}
},
io::TaskResult::LoadChange(None) => {}
io::TaskResult::LoadChange(Some(change)) => match change {
io::WatcherChangeData::Create { path, text }
| io::WatcherChangeData::Write { path, text } => {
if let Some((root, path, file)) = self.find_root(&path) {
if let Some(file) = file {
self.do_change_file(file, text, false);
} else {
self.do_add_file(root, path, text, false);
}
}
}
io::WatcherChangeData::Remove { path } => {
if let Some((root, path, file)) = self.find_root(&path) {
if let Some(file) = file {
self.do_remove_file(root, path, file, false);
}
}
}
},
}
}
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) {
let text = Arc::new(text);
let change = if let Some(file) = file {
res = Some(file);
self.change_file(file, Arc::clone(&text));
VfsChange::ChangeFile { file, text }
fn should_handle_change(&self, path: &Path) -> bool {
if let Some((_root, _rel_path, file)) = self.find_root(&path) {
if let Some(file) = file {
if self.files[file].is_overlayed {
// file is overlayed
return false;
}
}
true
} else {
let file = self.add_file(root, rel_path.clone(), Arc::clone(&text));
res = Some(file);
VfsChange::AddFile {
// file doesn't belong to any root
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,
text,
root,
path: rel_path,
path,
text,
});
Some(file)
}
};
self.pending_changes.push(change);
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> {
if let Some((root, rel_path, file)) = self.find_root(path) {
if let Some(file) = file {
self.do_change_file(file, text, true);
Some(file)
} else {
self.do_add_file(root, rel_path, text, true)
}
} else {
None
}
res
}
pub fn change_file_overlay(&mut self, path: &Path, new_text: String) {
if let Some((_root, _path, file)) = self.find_root(path) {
let file = file.expect("can't change a file which wasn't added");
let text = Arc::new(new_text);
self.change_file(file, Arc::clone(&text));
let change = VfsChange::ChangeFile { file, text };
self.pending_changes.push(change);
self.do_change_file(file, new_text, true);
}
}
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) {
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 change = if let Ok(text) = fs::read_to_string(&full_path) {
let text = Arc::new(text);
self.change_file(file, Arc::clone(&text));
VfsChange::ChangeFile { file, text }
if let Ok(text) = fs::read_to_string(&full_path) {
self.do_change_file(file, text, true);
} else {
self.remove_file(file);
VfsChange::RemoveFile { root, file, path }
};
self.pending_changes.push(change);
self.do_remove_file(root, path, file, true);
}
Some(file)
} else {
None
}
res
}
pub fn commit_changes(&mut self) -> Vec<VfsChange> {
@ -285,15 +355,28 @@ pub fn shutdown(self) -> thread::Result<()> {
self.worker_handle.shutdown()
}
fn add_file(&mut self, root: VfsRoot, path: RelativePathBuf, text: Arc<String>) -> VfsFile {
let data = VfsFileData { root, path, text };
fn add_file(
&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);
self.root2files.get_mut(&root).unwrap().insert(file);
file
}
fn change_file(&mut self, file: VfsFile, new_text: Arc<String>) {
self.files[file].text = new_text;
fn change_file(&mut self, file: VfsFile, new_text: Arc<String>, is_overlayed: bool) {
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) {

49
crates/ra_vfs/src/watcher.rs
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@ -5,10 +5,10 @@
time::Duration,
};
use crate::io;
use crossbeam_channel::Sender;
use drop_bomb::DropBomb;
use notify::{DebouncedEvent, RecommendedWatcher, RecursiveMode, Watcher as NotifyWatcher};
use crate::{has_rs_extension, io};
pub struct Watcher {
watcher: RecommendedWatcher,
@ -21,59 +21,41 @@ pub enum WatcherChange {
Create(PathBuf),
Write(PathBuf),
Remove(PathBuf),
// can this be replaced and use Remove and Create instead?
Rename(PathBuf, PathBuf),
Rescan,
}
impl WatcherChange {
fn try_from_debounced_event(ev: DebouncedEvent) -> Option<WatcherChange> {
fn send_change_events(
ev: DebouncedEvent,
sender: &Sender<io::Task>,
) -> Result<(), Box<std::error::Error>> {
match ev {
DebouncedEvent::NoticeWrite(_)
| DebouncedEvent::NoticeRemove(_)
| DebouncedEvent::Chmod(_) => {
// ignore
None
}
DebouncedEvent::Rescan => {
// TODO should we rescan the root?
None
sender.send(io::Task::LoadChange(WatcherChange::Rescan))?;
}
DebouncedEvent::Create(path) => {
if has_rs_extension(&path) {
Some(WatcherChange::Create(path))
} else {
None
}
sender.send(io::Task::LoadChange(WatcherChange::Create(path)))?;
}
DebouncedEvent::Write(path) => {
if has_rs_extension(&path) {
Some(WatcherChange::Write(path))
} else {
None
}
sender.send(io::Task::LoadChange(WatcherChange::Write(path)))?;
}
DebouncedEvent::Remove(path) => {
if has_rs_extension(&path) {
Some(WatcherChange::Remove(path))
} else {
None
}
sender.send(io::Task::LoadChange(WatcherChange::Remove(path)))?;
}
DebouncedEvent::Rename(src, dst) => {
match (has_rs_extension(&src), has_rs_extension(&dst)) {
(true, true) => Some(WatcherChange::Rename(src, dst)),
(true, false) => Some(WatcherChange::Remove(src)),
(false, true) => Some(WatcherChange::Create(dst)),
(false, false) => None,
}
sender.send(io::Task::LoadChange(WatcherChange::Remove(src)))?;
sender.send(io::Task::LoadChange(WatcherChange::Create(dst)))?;
}
DebouncedEvent::Error(err, path) => {
// TODO should we reload the file contents?
log::warn!("watch error {}, {:?}", err, path);
None
}
log::warn!("watcher error {}, {:?}", err, path);
}
}
Ok(())
}
impl Watcher {
@ -86,8 +68,7 @@ pub(crate) fn start(
input_receiver
.into_iter()
// forward relevant events only
.filter_map(WatcherChange::try_from_debounced_event)
.try_for_each(|change| output_sender.send(io::Task::WatcherChange(change)))
.try_for_each(|change| send_change_events(change, &output_sender))
.unwrap()
});
Ok(Watcher {

35
crates/ra_vfs/tests/vfs.rs
View File

@ -4,6 +4,13 @@
use ra_vfs::{Vfs, VfsChange};
use tempfile::tempdir;
fn process_tasks(vfs: &mut Vfs, num_tasks: u32) {
for _ in 0..num_tasks {
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
}
}
#[test]
fn test_vfs_works() -> std::io::Result<()> {
Logger::with_str("debug").start().unwrap();
@ -25,10 +32,7 @@ fn test_vfs_works() -> std::io::Result<()> {
let b_root = dir.path().join("a/b");
let (mut vfs, _) = Vfs::new(vec![a_root, b_root]);
for _ in 0..2 {
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
}
process_tasks(&mut vfs, 2);
{
let files = vfs
.commit_changes()
@ -57,30 +61,26 @@ fn test_vfs_works() -> std::io::Result<()> {
assert_eq!(files, expected_files);
}
// on disk change
fs::write(&dir.path().join("a/b/baz.rs"), "quux").unwrap();
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "quux"),
_ => panic!("unexpected changes"),
}
// in memory change
vfs.change_file_overlay(&dir.path().join("a/b/baz.rs"), "m".to_string());
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "m"),
_ => panic!("unexpected changes"),
}
// in memory remove, restores data on disk
// removing overlay restores data on disk
vfs.remove_file_overlay(&dir.path().join("a/b/baz.rs"));
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "quux"),
_ => panic!("unexpected changes"),
}
// in memory add
vfs.add_file_overlay(&dir.path().join("a/b/spam.rs"), "spam".to_string());
match vfs.commit_changes().as_slice() {
[VfsChange::AddFile { text, path, .. }] => {
@ -90,17 +90,14 @@ fn test_vfs_works() -> std::io::Result<()> {
_ => panic!("unexpected changes"),
}
// in memory remove
vfs.remove_file_overlay(&dir.path().join("a/b/spam.rs"));
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile { path, .. }] => assert_eq!(path, "spam.rs"),
_ => panic!("unexpected changes"),
}
// on disk add
fs::write(&dir.path().join("a/new.rs"), "new hello").unwrap();
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::AddFile { text, path, .. }] => {
assert_eq!(text.as_str(), "new hello");
@ -109,10 +106,8 @@ fn test_vfs_works() -> std::io::Result<()> {
_ => panic!("unexpected changes"),
}
// on disk rename
fs::rename(&dir.path().join("a/new.rs"), &dir.path().join("a/new1.rs")).unwrap();
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
process_tasks(&mut vfs, 2);
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile {
path: removed_path, ..
@ -125,13 +120,11 @@ fn test_vfs_works() -> std::io::Result<()> {
assert_eq!(added_path, "new1.rs");
assert_eq!(text.as_str(), "new hello");
}
_ => panic!("unexpected changes"),
xs => panic!("unexpected changes {:?}", xs),
}
// on disk remove
fs::remove_file(&dir.path().join("a/new1.rs")).unwrap();
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile { path, .. }] => assert_eq!(path, "new1.rs"),
_ => panic!("unexpected changes"),