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Assign new file handles on buffers when their files change on disk

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Co-Authored-By: Antonio Scandurra <me@as-cii.com>
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
This commit is contained in:
Max Brunsfeld 2021-10-21 13:08:11 +02:00
parent eb9d7c8660
commit 282195b13e
6 changed files with 102 additions and 101 deletions
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2
Cargo.lock generated
View File

@ -2815,6 +2815,7 @@ dependencies = [
"anyhow",
"buffer",
"clock",
"futures",
"gpui",
"lazy_static",
"log",
@ -2828,6 +2829,7 @@ dependencies = [
"tree-sitter",
"tree-sitter-rust",
"unindent",
"util",
]
[[package]]

10
crates/buffer/src/lib.rs
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@ -17,12 +17,10 @@ pub use point::*;
pub use random_char_iter::*;
pub use rope::{Chunks, Rope, TextSummary};
use rpc::proto;
use seahash::SeaHasher;
pub use selection::*;
use std::{
cmp,
convert::{TryFrom, TryInto},
hash::BuildHasher,
iter::Iterator,
ops::Range,
str,
@ -32,14 +30,16 @@ use std::{
pub use sum_tree::Bias;
use sum_tree::{FilterCursor, SumTree};
#[cfg(any(test, feature = "test-support"))]
#[derive(Clone, Default)]
struct DeterministicState;
impl BuildHasher for DeterministicState {
type Hasher = SeaHasher;
#[cfg(any(test, feature = "test-support"))]
impl std::hash::BuildHasher for DeterministicState {
type Hasher = seahash::SeaHasher;
fn build_hasher(&self) -> Self::Hasher {
SeaHasher::new()
seahash::SeaHasher::new()
}
}

4
crates/language/Cargo.toml
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@ -4,7 +4,7 @@ version = "0.1.0"
edition = "2018"
[features]
test-support = ["rand"]
test-support = ["rand", "buffer/test-support"]
[dependencies]
buffer = { path = "../buffer" }
@ -12,7 +12,9 @@ clock = { path = "../clock" }
gpui = { path = "../gpui" }
rpc = { path = "../rpc" }
theme = { path = "../theme" }
util = { path = "../util" }
anyhow = "1.0.38"
futures = "0.3"
lazy_static = "1.4"
log = "0.4"
parking_lot = "0.11.1"

69
crates/language/src/lib.rs
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@ -10,6 +10,7 @@ pub use self::{
use anyhow::{anyhow, Result};
pub use buffer::{Buffer as TextBuffer, *};
use clock::ReplicaId;
use futures::FutureExt as _;
use gpui::{AppContext, Entity, ModelContext, MutableAppContext, Task};
use lazy_static::lazy_static;
use parking_lot::Mutex;
@ -31,6 +32,7 @@ use std::{
time::{Duration, Instant, SystemTime, UNIX_EPOCH},
};
use tree_sitter::{InputEdit, Parser, QueryCursor, Tree};
use util::TryFutureExt as _;
thread_local! {
static PARSER: RefCell<Parser> = RefCell::new(Parser::new());
@ -83,16 +85,10 @@ pub trait File {
fn entry_id(&self) -> Option<usize>;
fn set_entry_id(&mut self, entry_id: Option<usize>);
fn mtime(&self) -> SystemTime;
fn set_mtime(&mut self, mtime: SystemTime);
fn path(&self) -> &Arc<Path>;
fn set_path(&mut self, path: Arc<Path>);
fn full_path(&self, cx: &AppContext) -> PathBuf;
/// Returns the last component of this handle's absolute path. If this handle refers to the root
@ -109,6 +105,8 @@ pub trait File {
cx: &mut MutableAppContext,
) -> Task<Result<(clock::Global, SystemTime)>>;
fn load_local(&self, cx: &AppContext) -> Option<Task<Result<String>>>;
fn buffer_updated(&self, buffer_id: u64, operation: Operation, cx: &mut MutableAppContext);
fn buffer_removed(&self, buffer_id: u64, cx: &mut MutableAppContext);
@ -256,10 +254,6 @@ impl Buffer {
self.file.as_deref()
}
pub fn file_mut(&mut self) -> Option<&mut dyn File> {
self.file.as_mut().map(|f| f.deref_mut() as &mut dyn File)
}
pub fn save(
&mut self,
cx: &mut ModelContext<Self>,
@ -300,42 +294,65 @@ impl Buffer {
cx.emit(Event::Saved);
}
pub fn file_renamed(&self, cx: &mut ModelContext<Self>) {
cx.emit(Event::FileHandleChanged);
}
pub fn file_updated(
&mut self,
new_text: String,
new_file: Box<dyn File>,
cx: &mut ModelContext<Self>,
) -> Option<Task<()>> {
if let Some(file) = self.file.as_ref() {
cx.emit(Event::FileHandleChanged);
let mtime = file.mtime();
if self.version == self.saved_version {
return Some(cx.spawn(|this, mut cx| async move {
let old_file = self.file.as_ref()?;
let mut file_changed = false;
let mut task = None;
if new_file.path() != old_file.path() {
file_changed = true;
}
if new_file.is_deleted() {
if !old_file.is_deleted() {
file_changed = true;
if !self.is_dirty() {
cx.emit(Event::Dirtied);
}
}
} else {
let new_mtime = new_file.mtime();
if new_mtime != old_file.mtime() {
file_changed = true;
if !self.is_dirty() {
task = Some(cx.spawn(|this, mut cx| {
async move {
let new_text = this.read_with(&cx, |this, cx| {
this.file.as_ref().and_then(|file| file.load_local(cx))
});
if let Some(new_text) = new_text {
let new_text = new_text.await?;
let diff = this
.read_with(&cx, |this, cx| this.diff(new_text.into(), cx))
.await;
this.update(&mut cx, |this, cx| {
if this.apply_diff(diff, cx) {
this.saved_version = this.version.clone();
this.saved_mtime = mtime;
this.saved_mtime = new_mtime;
cx.emit(Event::Reloaded);
}
});
}
Ok(())
}
.log_err()
.map(drop)
}));
}
}
None
}
pub fn file_deleted(&mut self, cx: &mut ModelContext<Self>) {
if self.version == self.saved_version {
cx.emit(Event::Dirtied);
}
if file_changed {
cx.emit(Event::FileHandleChanged);
}
self.file = Some(new_file);
task
}
pub fn close(&mut self, cx: &mut ModelContext<Self>) {
cx.emit(Event::Closed);

3
crates/project/Cargo.toml
View File

@ -4,7 +4,7 @@ version = "0.1.0"
edition = "2018"
[features]
test-support = []
test-support = ["language/test-support", "buffer/test-support"]
[dependencies]
buffer = { path = "../buffer" }
@ -34,6 +34,7 @@ toml = "0.5"
[dev-dependencies]
client = { path = "../client", features = ["test-support"] }
gpui = { path = "../gpui", features = ["test-support"] }
language = { path = "../language", features = ["test-support"] }
util = { path = "../util", features = ["test-support"] }
rpc = { path = "../rpc", features = ["test-support"] }

91
crates/project/src/worktree.rs
View File

@ -587,43 +587,40 @@ impl Worktree {
}
};
let worktree_handle = cx.handle();
let mut buffers_to_delete = Vec::new();
for (buffer_id, buffer) in open_buffers {
if let Some(buffer) = buffer.upgrade(cx) {
buffer.update(cx, |buffer, cx| {
let buffer_is_clean = !buffer.is_dirty();
if let Some(file) = buffer.file_mut() {
if let Some(entry) = file
if let Some(old_file) = buffer.file() {
let new_file = if let Some(entry) = old_file
.entry_id()
.and_then(|entry_id| self.entry_for_id(entry_id))
{
if entry.mtime != file.mtime() {
file.set_mtime(entry.mtime);
if let Some(worktree) = self.as_local() {
if buffer_is_clean {
let abs_path = worktree.absolutize(file.path().as_ref());
refresh_buffer(abs_path, &worktree.fs, cx);
File {
entry_id: Some(entry.id),
mtime: entry.mtime,
path: entry.path.clone(),
worktree: worktree_handle.clone(),
}
} else if let Some(entry) = self.entry_for_path(old_file.path().as_ref()) {
File {
entry_id: Some(entry.id),
mtime: entry.mtime,
path: entry.path.clone(),
worktree: worktree_handle.clone(),
}
} else {
File {
entry_id: None,
path: old_file.path().clone(),
mtime: old_file.mtime(),
worktree: worktree_handle.clone(),
}
};
if entry.path != *file.path() {
file.set_path(entry.path.clone());
buffer.file_renamed(cx);
}
} else if let Some(entry) = self.entry_for_path(file.path().as_ref()) {
file.set_entry_id(Some(entry.id));
file.set_mtime(entry.mtime);
if let Some(worktree) = self.as_local() {
if buffer_is_clean {
let abs_path = worktree.absolutize(file.path().as_ref());
refresh_buffer(abs_path, &worktree.fs, cx);
}
}
} else if !file.is_deleted() {
file.set_entry_id(None);
buffer.file_deleted(cx);
if let Some(task) = buffer.file_updated(Box::new(new_file), cx) {
task.detach();
}
}
});
@ -1172,23 +1169,6 @@ fn build_gitignore(abs_path: &Path, fs: &dyn Fs) -> Result<Gitignore> {
Ok(builder.build()?)
}
pub fn refresh_buffer(abs_path: PathBuf, fs: &Arc<dyn Fs>, cx: &mut ModelContext<Buffer>) {
let fs = fs.clone();
cx.spawn(|buffer, mut cx| async move {
match fs.load(&abs_path).await {
Err(error) => log::error!("error refreshing buffer after file changed: {}", error),
Ok(new_text) => {
if let Some(task) =
buffer.update(&mut cx, |buffer, cx| buffer.file_updated(new_text, cx))
{
task.await;
}
}
}
})
.detach()
}
impl Deref for LocalWorktree {
type Target = Snapshot;
@ -1787,26 +1767,14 @@ impl language::File for File {
self.entry_id
}
fn set_entry_id(&mut self, entry_id: Option<usize>) {
self.entry_id = entry_id;
}
fn mtime(&self) -> SystemTime {
self.mtime
}
fn set_mtime(&mut self, mtime: SystemTime) {
self.mtime = mtime;
}
fn path(&self) -> &Arc<Path> {
&self.path
}
fn set_path(&mut self, path: Arc<Path>) {
self.path = path;
}
fn full_path(&self, cx: &AppContext) -> PathBuf {
let worktree = self.worktree.read(cx);
let mut full_path = PathBuf::new();
@ -1875,6 +1843,16 @@ impl language::File for File {
})
}
fn load_local(&self, cx: &AppContext) -> Option<Task<Result<String>>> {
let worktree = self.worktree.read(cx).as_local()?;
let abs_path = worktree.absolutize(&self.path);
let fs = worktree.fs.clone();
Some(
cx.background()
.spawn(async move { fs.load(&abs_path).await }),
)
}
fn buffer_updated(&self, buffer_id: u64, operation: Operation, cx: &mut MutableAppContext) {
self.worktree.update(cx, |worktree, cx| {
if let Some((rpc, remote_id)) = match worktree {
@ -3430,12 +3408,13 @@ mod tests {
buffer.update(&mut cx, |buffer, cx| {
buffer.edit(vec![0..0], " ", cx);
assert!(buffer.is_dirty());
assert!(!buffer.has_conflict());
});
// Change the file on disk again, adding blank lines to the beginning.
fs::write(&abs_path, "\n\n\nAAAA\naaa\nBB\nbbbbb\n").unwrap();
// Becaues the buffer is modified, it doesn't reload from disk, but is
// Because the buffer is modified, it doesn't reload from disk, but is
// marked as having a conflict.
buffer
.condition(&cx, |buffer, _| buffer.has_conflict())